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-rw-r--r--contrib/fmt/LICENSE.rst27
-rw-r--r--contrib/fmt/README.rst506
-rw-r--r--contrib/fmt/include/fmt/args.h234
-rw-r--r--contrib/fmt/include/fmt/chrono.h2267
-rw-r--r--contrib/fmt/include/fmt/color.h633
-rw-r--r--contrib/fmt/include/fmt/compile.h607
-rw-r--r--contrib/fmt/include/fmt/core.h2951
-rw-r--r--contrib/fmt/include/fmt/format-inl.h1681
-rw-r--r--contrib/fmt/include/fmt/format.h4735
-rw-r--r--contrib/fmt/include/fmt/locale.h2
-rw-r--r--contrib/fmt/include/fmt/os.h451
-rw-r--r--contrib/fmt/include/fmt/ostream.h209
-rw-r--r--contrib/fmt/include/fmt/posix.h2
-rw-r--r--contrib/fmt/include/fmt/printf.h679
-rw-r--r--contrib/fmt/include/fmt/ranges.h732
-rw-r--r--contrib/fmt/include/fmt/std.h349
-rw-r--r--contrib/fmt/include/fmt/xchar.h259
17 files changed, 16324 insertions, 0 deletions
diff --git a/contrib/fmt/LICENSE.rst b/contrib/fmt/LICENSE.rst
new file mode 100644
index 0000000..f0ec3db
--- /dev/null
+++ b/contrib/fmt/LICENSE.rst
@@ -0,0 +1,27 @@
+Copyright (c) 2012 - present, Victor Zverovich
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+--- Optional exception to the license ---
+
+As an exception, if, as a result of your compiling your source code, portions
+of this Software are embedded into a machine-executable object form of such
+source code, you may redistribute such embedded portions in such object form
+without including the above copyright and permission notices.
diff --git a/contrib/fmt/README.rst b/contrib/fmt/README.rst
new file mode 100644
index 0000000..acddc70
--- /dev/null
+++ b/contrib/fmt/README.rst
@@ -0,0 +1,506 @@
+{fmt}
+=====
+
+.. image:: https://travis-ci.org/fmtlib/fmt.png?branch=master
+ :target: https://travis-ci.org/fmtlib/fmt
+
+.. image:: https://ci.appveyor.com/api/projects/status/ehjkiefde6gucy1v
+ :target: https://ci.appveyor.com/project/vitaut/fmt
+
+.. image:: https://oss-fuzz-build-logs.storage.googleapis.com/badges/fmt.svg
+ :alt: fmt is continuously fuzzed at oss-fuzz
+ :target: https://bugs.chromium.org/p/oss-fuzz/issues/list?\
+ colspec=ID%20Type%20Component%20Status%20Proj%20Reported%20Owner%20\
+ Summary&q=proj%3Dfmt&can=1
+
+.. image:: https://img.shields.io/badge/stackoverflow-fmt-blue.svg
+ :alt: Ask questions at StackOverflow with the tag fmt
+ :target: https://stackoverflow.com/questions/tagged/fmt
+
+**{fmt}** is an open-source formatting library providing a fast and safe
+alternative to C stdio and C++ iostreams.
+
+If you like this project, please consider donating to BYSOL,
+an initiative to help victims of political repressions in Belarus:
+https://www.facebook.com/donate/759400044849707/108388587646909/.
+
+`Documentation <https://fmt.dev>`__
+
+Q&A: ask questions on `StackOverflow with the tag fmt
+<https://stackoverflow.com/questions/tagged/fmt>`_.
+
+Try {fmt} in `Compiler Explorer <https://godbolt.org/z/Eq5763>`_.
+
+Features
+--------
+
+* Simple `format API <https://fmt.dev/latest/api.html>`_ with positional arguments
+ for localization
+* Implementation of `C++20 std::format
+ <https://en.cppreference.com/w/cpp/utility/format>`__
+* `Format string syntax <https://fmt.dev/latest/syntax.html>`_ similar to Python's
+ `format <https://docs.python.org/3/library/stdtypes.html#str.format>`_
+* Fast IEEE 754 floating-point formatter with correct rounding, shortness and
+ round-trip guarantees
+* Safe `printf implementation
+ <https://fmt.dev/latest/api.html#printf-formatting>`_ including the POSIX
+ extension for positional arguments
+* Extensibility: `support for user-defined types
+ <https://fmt.dev/latest/api.html#formatting-user-defined-types>`_
+* High performance: faster than common standard library implementations of
+ ``(s)printf``, iostreams, ``to_string`` and ``to_chars``, see `Speed tests`_
+ and `Converting a hundred million integers to strings per second
+ <http://www.zverovich.net/2020/06/13/fast-int-to-string-revisited.html>`_
+* Small code size both in terms of source code with the minimum configuration
+ consisting of just three files, ``core.h``, ``format.h`` and ``format-inl.h``,
+ and compiled code; see `Compile time and code bloat`_
+* Reliability: the library has an extensive set of `tests
+ <https://github.com/fmtlib/fmt/tree/master/test>`_ and is `continuously fuzzed
+ <https://bugs.chromium.org/p/oss-fuzz/issues/list?colspec=ID%20Type%20
+ Component%20Status%20Proj%20Reported%20Owner%20Summary&q=proj%3Dfmt&can=1>`_
+* Safety: the library is fully type safe, errors in format strings can be
+ reported at compile time, automatic memory management prevents buffer overflow
+ errors
+* Ease of use: small self-contained code base, no external dependencies,
+ permissive MIT `license
+ <https://github.com/fmtlib/fmt/blob/master/LICENSE.rst>`_
+* `Portability <https://fmt.dev/latest/index.html#portability>`_ with
+ consistent output across platforms and support for older compilers
+* Clean warning-free codebase even on high warning levels such as
+ ``-Wall -Wextra -pedantic``
+* Locale-independence by default
+* Optional header-only configuration enabled with the ``FMT_HEADER_ONLY`` macro
+
+See the `documentation <https://fmt.dev>`_ for more details.
+
+Examples
+--------
+
+**Print to stdout** (`run <https://godbolt.org/z/Tevcjh>`_)
+
+.. code:: c++
+
+ #include <fmt/core.h>
+
+ int main() {
+ fmt::print("Hello, world!\n");
+ }
+
+**Format a string** (`run <https://godbolt.org/z/oK8h33>`_)
+
+.. code:: c++
+
+ std::string s = fmt::format("The answer is {}.", 42);
+ // s == "The answer is 42."
+
+**Format a string using positional arguments** (`run <https://godbolt.org/z/Yn7Txe>`_)
+
+.. code:: c++
+
+ std::string s = fmt::format("I'd rather be {1} than {0}.", "right", "happy");
+ // s == "I'd rather be happy than right."
+
+**Print chrono durations** (`run <https://godbolt.org/z/K8s4Mc>`_)
+
+.. code:: c++
+
+ #include <fmt/chrono.h>
+
+ int main() {
+ using namespace std::literals::chrono_literals;
+ fmt::print("Default format: {} {}\n", 42s, 100ms);
+ fmt::print("strftime-like format: {:%H:%M:%S}\n", 3h + 15min + 30s);
+ }
+
+Output::
+
+ Default format: 42s 100ms
+ strftime-like format: 03:15:30
+
+**Print a container** (`run <https://godbolt.org/z/MjsY7c>`_)
+
+.. code:: c++
+
+ #include <vector>
+ #include <fmt/ranges.h>
+
+ int main() {
+ std::vector<int> v = {1, 2, 3};
+ fmt::print("{}\n", v);
+ }
+
+Output::
+
+ {1, 2, 3}
+
+**Check a format string at compile time**
+
+.. code:: c++
+
+ std::string s = fmt::format(FMT_STRING("{:d}"), "don't panic");
+
+This gives a compile-time error because ``d`` is an invalid format specifier for
+a string.
+
+**Write a file from a single thread**
+
+.. code:: c++
+
+ #include <fmt/os.h>
+
+ int main() {
+ auto out = fmt::output_file("guide.txt");
+ out.print("Don't {}", "Panic");
+ }
+
+This can be `5 to 9 times faster than fprintf
+<http://www.zverovich.net/2020/08/04/optimal-file-buffer-size.html>`_.
+
+**Print with colors and text styles**
+
+.. code:: c++
+
+ #include <fmt/color.h>
+
+ int main() {
+ fmt::print(fg(fmt::color::crimson) | fmt::emphasis::bold,
+ "Hello, {}!\n", "world");
+ fmt::print(fg(fmt::color::floral_white) | bg(fmt::color::slate_gray) |
+ fmt::emphasis::underline, "Hello, {}!\n", "мир");
+ fmt::print(fg(fmt::color::steel_blue) | fmt::emphasis::italic,
+ "Hello, {}!\n", "世界");
+ }
+
+Output on a modern terminal:
+
+.. image:: https://user-images.githubusercontent.com/
+ 576385/88485597-d312f600-cf2b-11ea-9cbe-61f535a86e28.png
+
+Benchmarks
+----------
+
+Speed tests
+~~~~~~~~~~~
+
+================= ============= ===========
+Library Method Run Time, s
+================= ============= ===========
+libc printf 1.04
+libc++ std::ostream 3.05
+{fmt} 6.1.1 fmt::print 0.75
+Boost Format 1.67 boost::format 7.24
+Folly Format folly::format 2.23
+================= ============= ===========
+
+{fmt} is the fastest of the benchmarked methods, ~35% faster than ``printf``.
+
+The above results were generated by building ``tinyformat_test.cpp`` on macOS
+10.14.6 with ``clang++ -O3 -DNDEBUG -DSPEED_TEST -DHAVE_FORMAT``, and taking the
+best of three runs. In the test, the format string ``"%0.10f:%04d:%+g:%s:%p:%c:%%\n"``
+or equivalent is filled 2,000,000 times with output sent to ``/dev/null``; for
+further details refer to the `source
+<https://github.com/fmtlib/format-benchmark/blob/master/tinyformat_test.cpp>`_.
+
+{fmt} is up to 20-30x faster than ``std::ostringstream`` and ``sprintf`` on
+floating-point formatting (`dtoa-benchmark <https://github.com/fmtlib/dtoa-benchmark>`_)
+and faster than `double-conversion <https://github.com/google/double-conversion>`_ and
+`ryu <https://github.com/ulfjack/ryu>`_:
+
+.. image:: https://user-images.githubusercontent.com/576385/
+ 95684665-11719600-0ba8-11eb-8e5b-972ff4e49428.png
+ :target: https://fmt.dev/unknown_mac64_clang12.0.html
+
+Compile time and code bloat
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The script `bloat-test.py
+<https://github.com/fmtlib/format-benchmark/blob/master/bloat-test.py>`_
+from `format-benchmark <https://github.com/fmtlib/format-benchmark>`_
+tests compile time and code bloat for nontrivial projects.
+It generates 100 translation units and uses ``printf()`` or its alternative
+five times in each to simulate a medium sized project. The resulting
+executable size and compile time (Apple LLVM version 8.1.0 (clang-802.0.42),
+macOS Sierra, best of three) is shown in the following tables.
+
+**Optimized build (-O3)**
+
+============= =============== ==================== ==================
+Method Compile Time, s Executable size, KiB Stripped size, KiB
+============= =============== ==================== ==================
+printf 2.6 29 26
+printf+string 16.4 29 26
+iostreams 31.1 59 55
+{fmt} 19.0 37 34
+Boost Format 91.9 226 203
+Folly Format 115.7 101 88
+============= =============== ==================== ==================
+
+As you can see, {fmt} has 60% less overhead in terms of resulting binary code
+size compared to iostreams and comes pretty close to ``printf``. Boost Format
+and Folly Format have the largest overheads.
+
+``printf+string`` is the same as ``printf`` but with extra ``<string>``
+include to measure the overhead of the latter.
+
+**Non-optimized build**
+
+============= =============== ==================== ==================
+Method Compile Time, s Executable size, KiB Stripped size, KiB
+============= =============== ==================== ==================
+printf 2.2 33 30
+printf+string 16.0 33 30
+iostreams 28.3 56 52
+{fmt} 18.2 59 50
+Boost Format 54.1 365 303
+Folly Format 79.9 445 430
+============= =============== ==================== ==================
+
+``libc``, ``lib(std)c++`` and ``libfmt`` are all linked as shared libraries to
+compare formatting function overhead only. Boost Format is a
+header-only library so it doesn't provide any linkage options.
+
+Running the tests
+~~~~~~~~~~~~~~~~~
+
+Please refer to `Building the library`__ for the instructions on how to build
+the library and run the unit tests.
+
+__ https://fmt.dev/latest/usage.html#building-the-library
+
+Benchmarks reside in a separate repository,
+`format-benchmarks <https://github.com/fmtlib/format-benchmark>`_,
+so to run the benchmarks you first need to clone this repository and
+generate Makefiles with CMake::
+
+ $ git clone --recursive https://github.com/fmtlib/format-benchmark.git
+ $ cd format-benchmark
+ $ cmake .
+
+Then you can run the speed test::
+
+ $ make speed-test
+
+or the bloat test::
+
+ $ make bloat-test
+
+Projects using this library
+---------------------------
+
+* `0 A.D. <https://play0ad.com/>`_: a free, open-source, cross-platform
+ real-time strategy game
+
+* `AMPL/MP <https://github.com/ampl/mp>`_:
+ an open-source library for mathematical programming
+
+* `Aseprite <https://github.com/aseprite/aseprite>`_:
+ animated sprite editor & pixel art tool
+
+* `AvioBook <https://www.aviobook.aero/en>`_: a comprehensive aircraft
+ operations suite
+
+* `Blizzard Battle.net <https://battle.net/>`_: an online gaming platform
+
+* `Celestia <https://celestia.space/>`_: real-time 3D visualization of space
+
+* `Ceph <https://ceph.com/>`_: a scalable distributed storage system
+
+* `ccache <https://ccache.dev/>`_: a compiler cache
+
+* `ClickHouse <https://github.com/ClickHouse/ClickHouse>`_: analytical database
+ management system
+
+* `CUAUV <http://cuauv.org/>`_: Cornell University's autonomous underwater
+ vehicle
+
+* `Drake <https://drake.mit.edu/>`_: a planning, control, and analysis toolbox
+ for nonlinear dynamical systems (MIT)
+
+* `Envoy <https://lyft.github.io/envoy/>`_: C++ L7 proxy and communication bus
+ (Lyft)
+
+* `FiveM <https://fivem.net/>`_: a modification framework for GTA V
+
+* `Folly <https://github.com/facebook/folly>`_: Facebook open-source library
+
+* `HarpyWar/pvpgn <https://github.com/pvpgn/pvpgn-server>`_:
+ Player vs Player Gaming Network with tweaks
+
+* `KBEngine <https://github.com/kbengine/kbengine>`_: an open-source MMOG server
+ engine
+
+* `Keypirinha <https://keypirinha.com/>`_: a semantic launcher for Windows
+
+* `Kodi <https://kodi.tv/>`_ (formerly xbmc): home theater software
+
+* `Knuth <https://kth.cash/>`_: high-performance Bitcoin full-node
+
+* `Microsoft Verona <https://github.com/microsoft/verona>`_:
+ research programming language for concurrent ownership
+
+* `MongoDB <https://mongodb.com/>`_: distributed document database
+
+* `MongoDB Smasher <https://github.com/duckie/mongo_smasher>`_: a small tool to
+ generate randomized datasets
+
+* `OpenSpace <https://openspaceproject.com/>`_: an open-source
+ astrovisualization framework
+
+* `PenUltima Online (POL) <https://www.polserver.com/>`_:
+ an MMO server, compatible with most Ultima Online clients
+
+* `PyTorch <https://github.com/pytorch/pytorch>`_: an open-source machine
+ learning library
+
+* `quasardb <https://www.quasardb.net/>`_: a distributed, high-performance,
+ associative database
+
+* `Quill <https://github.com/odygrd/quill>`_: asynchronous low-latency logging library
+
+* `QKW <https://github.com/ravijanjam/qkw>`_: generalizing aliasing to simplify
+ navigation, and executing complex multi-line terminal command sequences
+
+* `redis-cerberus <https://github.com/HunanTV/redis-cerberus>`_: a Redis cluster
+ proxy
+
+* `redpanda <https://vectorized.io/redpanda>`_: a 10x faster Kafka® replacement
+ for mission critical systems written in C++
+
+* `rpclib <http://rpclib.net/>`_: a modern C++ msgpack-RPC server and client
+ library
+
+* `Salesforce Analytics Cloud
+ <https://www.salesforce.com/analytics-cloud/overview/>`_:
+ business intelligence software
+
+* `Scylla <https://www.scylladb.com/>`_: a Cassandra-compatible NoSQL data store
+ that can handle 1 million transactions per second on a single server
+
+* `Seastar <http://www.seastar-project.org/>`_: an advanced, open-source C++
+ framework for high-performance server applications on modern hardware
+
+* `spdlog <https://github.com/gabime/spdlog>`_: super fast C++ logging library
+
+* `Stellar <https://www.stellar.org/>`_: financial platform
+
+* `Touch Surgery <https://www.touchsurgery.com/>`_: surgery simulator
+
+* `TrinityCore <https://github.com/TrinityCore/TrinityCore>`_: open-source
+ MMORPG framework
+
+* `Windows Terminal <https://github.com/microsoft/terminal>`_: the new Windows
+ terminal
+
+`More... <https://github.com/search?q=fmtlib&type=Code>`_
+
+If you are aware of other projects using this library, please let me know
+by `email <mailto:victor.zverovich@gmail.com>`_ or by submitting an
+`issue <https://github.com/fmtlib/fmt/issues>`_.
+
+Motivation
+----------
+
+So why yet another formatting library?
+
+There are plenty of methods for doing this task, from standard ones like
+the printf family of function and iostreams to Boost Format and FastFormat
+libraries. The reason for creating a new library is that every existing
+solution that I found either had serious issues or didn't provide
+all the features I needed.
+
+printf
+~~~~~~
+
+The good thing about ``printf`` is that it is pretty fast and readily available
+being a part of the C standard library. The main drawback is that it
+doesn't support user-defined types. ``printf`` also has safety issues although
+they are somewhat mitigated with `__attribute__ ((format (printf, ...))
+<https://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html>`_ in GCC.
+There is a POSIX extension that adds positional arguments required for
+`i18n <https://en.wikipedia.org/wiki/Internationalization_and_localization>`_
+to ``printf`` but it is not a part of C99 and may not be available on some
+platforms.
+
+iostreams
+~~~~~~~~~
+
+The main issue with iostreams is best illustrated with an example:
+
+.. code:: c++
+
+ std::cout << std::setprecision(2) << std::fixed << 1.23456 << "\n";
+
+which is a lot of typing compared to printf:
+
+.. code:: c++
+
+ printf("%.2f\n", 1.23456);
+
+Matthew Wilson, the author of FastFormat, called this "chevron hell". iostreams
+don't support positional arguments by design.
+
+The good part is that iostreams support user-defined types and are safe although
+error handling is awkward.
+
+Boost Format
+~~~~~~~~~~~~
+
+This is a very powerful library which supports both ``printf``-like format
+strings and positional arguments. Its main drawback is performance. According to
+various, benchmarks it is much slower than other methods considered here. Boost
+Format also has excessive build times and severe code bloat issues (see
+`Benchmarks`_).
+
+FastFormat
+~~~~~~~~~~
+
+This is an interesting library which is fast, safe and has positional arguments.
+However, it has significant limitations, citing its author:
+
+ Three features that have no hope of being accommodated within the
+ current design are:
+
+ * Leading zeros (or any other non-space padding)
+ * Octal/hexadecimal encoding
+ * Runtime width/alignment specification
+
+It is also quite big and has a heavy dependency, STLSoft, which might be too
+restrictive for using it in some projects.
+
+Boost Spirit.Karma
+~~~~~~~~~~~~~~~~~~
+
+This is not really a formatting library but I decided to include it here for
+completeness. As iostreams, it suffers from the problem of mixing verbatim text
+with arguments. The library is pretty fast, but slower on integer formatting
+than ``fmt::format_to`` with format string compilation on Karma's own benchmark,
+see `Converting a hundred million integers to strings per second
+<http://www.zverovich.net/2020/06/13/fast-int-to-string-revisited.html>`_.
+
+License
+-------
+
+{fmt} is distributed under the MIT `license
+<https://github.com/fmtlib/fmt/blob/master/LICENSE.rst>`_.
+
+Documentation License
+---------------------
+
+The `Format String Syntax <https://fmt.dev/latest/syntax.html>`_
+section in the documentation is based on the one from Python `string module
+documentation <https://docs.python.org/3/library/string.html#module-string>`_.
+For this reason the documentation is distributed under the Python Software
+Foundation license available in `doc/python-license.txt
+<https://raw.github.com/fmtlib/fmt/master/doc/python-license.txt>`_.
+It only applies if you distribute the documentation of {fmt}.
+
+Maintainers
+-----------
+
+The {fmt} library is maintained by Victor Zverovich (`vitaut
+<https://github.com/vitaut>`_) and Jonathan Müller (`foonathan
+<https://github.com/foonathan>`_) with contributions from many other people.
+See `Contributors <https://github.com/fmtlib/fmt/graphs/contributors>`_ and
+`Releases <https://github.com/fmtlib/fmt/releases>`_ for some of the names.
+Let us know if your contribution is not listed or mentioned incorrectly and
+we'll make it right.
diff --git a/contrib/fmt/include/fmt/args.h b/contrib/fmt/include/fmt/args.h
new file mode 100644
index 0000000..a3966d1
--- /dev/null
+++ b/contrib/fmt/include/fmt/args.h
@@ -0,0 +1,234 @@
+// Formatting library for C++ - dynamic format arguments
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_ARGS_H_
+#define FMT_ARGS_H_
+
+#include <functional> // std::reference_wrapper
+#include <memory> // std::unique_ptr
+#include <vector>
+
+#include "core.h"
+
+FMT_BEGIN_NAMESPACE
+
+namespace detail {
+
+template <typename T> struct is_reference_wrapper : std::false_type {};
+template <typename T>
+struct is_reference_wrapper<std::reference_wrapper<T>> : std::true_type {};
+
+template <typename T> const T& unwrap(const T& v) { return v; }
+template <typename T> const T& unwrap(const std::reference_wrapper<T>& v) {
+ return static_cast<const T&>(v);
+}
+
+class dynamic_arg_list {
+ // Workaround for clang's -Wweak-vtables. Unlike for regular classes, for
+ // templates it doesn't complain about inability to deduce single translation
+ // unit for placing vtable. So storage_node_base is made a fake template.
+ template <typename = void> struct node {
+ virtual ~node() = default;
+ std::unique_ptr<node<>> next;
+ };
+
+ template <typename T> struct typed_node : node<> {
+ T value;
+
+ template <typename Arg>
+ FMT_CONSTEXPR typed_node(const Arg& arg) : value(arg) {}
+
+ template <typename Char>
+ FMT_CONSTEXPR typed_node(const basic_string_view<Char>& arg)
+ : value(arg.data(), arg.size()) {}
+ };
+
+ std::unique_ptr<node<>> head_;
+
+ public:
+ template <typename T, typename Arg> const T& push(const Arg& arg) {
+ auto new_node = std::unique_ptr<typed_node<T>>(new typed_node<T>(arg));
+ auto& value = new_node->value;
+ new_node->next = std::move(head_);
+ head_ = std::move(new_node);
+ return value;
+ }
+};
+} // namespace detail
+
+/**
+ \rst
+ A dynamic version of `fmt::format_arg_store`.
+ It's equipped with a storage to potentially temporary objects which lifetimes
+ could be shorter than the format arguments object.
+
+ It can be implicitly converted into `~fmt::basic_format_args` for passing
+ into type-erased formatting functions such as `~fmt::vformat`.
+ \endrst
+ */
+template <typename Context>
+class dynamic_format_arg_store
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
+ // Workaround a GCC template argument substitution bug.
+ : public basic_format_args<Context>
+#endif
+{
+ private:
+ using char_type = typename Context::char_type;
+
+ template <typename T> struct need_copy {
+ static constexpr detail::type mapped_type =
+ detail::mapped_type_constant<T, Context>::value;
+
+ enum {
+ value = !(detail::is_reference_wrapper<T>::value ||
+ std::is_same<T, basic_string_view<char_type>>::value ||
+ std::is_same<T, detail::std_string_view<char_type>>::value ||
+ (mapped_type != detail::type::cstring_type &&
+ mapped_type != detail::type::string_type &&
+ mapped_type != detail::type::custom_type))
+ };
+ };
+
+ template <typename T>
+ using stored_type = conditional_t<
+ std::is_convertible<T, std::basic_string<char_type>>::value &&
+ !detail::is_reference_wrapper<T>::value,
+ std::basic_string<char_type>, T>;
+
+ // Storage of basic_format_arg must be contiguous.
+ std::vector<basic_format_arg<Context>> data_;
+ std::vector<detail::named_arg_info<char_type>> named_info_;
+
+ // Storage of arguments not fitting into basic_format_arg must grow
+ // without relocation because items in data_ refer to it.
+ detail::dynamic_arg_list dynamic_args_;
+
+ friend class basic_format_args<Context>;
+
+ unsigned long long get_types() const {
+ return detail::is_unpacked_bit | data_.size() |
+ (named_info_.empty()
+ ? 0ULL
+ : static_cast<unsigned long long>(detail::has_named_args_bit));
+ }
+
+ const basic_format_arg<Context>* data() const {
+ return named_info_.empty() ? data_.data() : data_.data() + 1;
+ }
+
+ template <typename T> void emplace_arg(const T& arg) {
+ data_.emplace_back(detail::make_arg<Context>(arg));
+ }
+
+ template <typename T>
+ void emplace_arg(const detail::named_arg<char_type, T>& arg) {
+ if (named_info_.empty()) {
+ constexpr const detail::named_arg_info<char_type>* zero_ptr{nullptr};
+ data_.insert(data_.begin(), {zero_ptr, 0});
+ }
+ data_.emplace_back(detail::make_arg<Context>(detail::unwrap(arg.value)));
+ auto pop_one = [](std::vector<basic_format_arg<Context>>* data) {
+ data->pop_back();
+ };
+ std::unique_ptr<std::vector<basic_format_arg<Context>>, decltype(pop_one)>
+ guard{&data_, pop_one};
+ named_info_.push_back({arg.name, static_cast<int>(data_.size() - 2u)});
+ data_[0].value_.named_args = {named_info_.data(), named_info_.size()};
+ guard.release();
+ }
+
+ public:
+ constexpr dynamic_format_arg_store() = default;
+
+ /**
+ \rst
+ Adds an argument into the dynamic store for later passing to a formatting
+ function.
+
+ Note that custom types and string types (but not string views) are copied
+ into the store dynamically allocating memory if necessary.
+
+ **Example**::
+
+ fmt::dynamic_format_arg_store<fmt::format_context> store;
+ store.push_back(42);
+ store.push_back("abc");
+ store.push_back(1.5f);
+ std::string result = fmt::vformat("{} and {} and {}", store);
+ \endrst
+ */
+ template <typename T> void push_back(const T& arg) {
+ if (detail::const_check(need_copy<T>::value))
+ emplace_arg(dynamic_args_.push<stored_type<T>>(arg));
+ else
+ emplace_arg(detail::unwrap(arg));
+ }
+
+ /**
+ \rst
+ Adds a reference to the argument into the dynamic store for later passing to
+ a formatting function.
+
+ **Example**::
+
+ fmt::dynamic_format_arg_store<fmt::format_context> store;
+ char band[] = "Rolling Stones";
+ store.push_back(std::cref(band));
+ band[9] = 'c'; // Changing str affects the output.
+ std::string result = fmt::vformat("{}", store);
+ // result == "Rolling Scones"
+ \endrst
+ */
+ template <typename T> void push_back(std::reference_wrapper<T> arg) {
+ static_assert(
+ need_copy<T>::value,
+ "objects of built-in types and string views are always copied");
+ emplace_arg(arg.get());
+ }
+
+ /**
+ Adds named argument into the dynamic store for later passing to a formatting
+ function. ``std::reference_wrapper`` is supported to avoid copying of the
+ argument. The name is always copied into the store.
+ */
+ template <typename T>
+ void push_back(const detail::named_arg<char_type, T>& arg) {
+ const char_type* arg_name =
+ dynamic_args_.push<std::basic_string<char_type>>(arg.name).c_str();
+ if (detail::const_check(need_copy<T>::value)) {
+ emplace_arg(
+ fmt::arg(arg_name, dynamic_args_.push<stored_type<T>>(arg.value)));
+ } else {
+ emplace_arg(fmt::arg(arg_name, arg.value));
+ }
+ }
+
+ /** Erase all elements from the store */
+ void clear() {
+ data_.clear();
+ named_info_.clear();
+ dynamic_args_ = detail::dynamic_arg_list();
+ }
+
+ /**
+ \rst
+ Reserves space to store at least *new_cap* arguments including
+ *new_cap_named* named arguments.
+ \endrst
+ */
+ void reserve(size_t new_cap, size_t new_cap_named) {
+ FMT_ASSERT(new_cap >= new_cap_named,
+ "Set of arguments includes set of named arguments");
+ data_.reserve(new_cap);
+ named_info_.reserve(new_cap_named);
+ }
+};
+
+FMT_END_NAMESPACE
+
+#endif // FMT_ARGS_H_
diff --git a/contrib/fmt/include/fmt/chrono.h b/contrib/fmt/include/fmt/chrono.h
new file mode 100644
index 0000000..55e8a50
--- /dev/null
+++ b/contrib/fmt/include/fmt/chrono.h
@@ -0,0 +1,2267 @@
+// Formatting library for C++ - chrono support
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_CHRONO_H_
+#define FMT_CHRONO_H_
+
+#include <algorithm>
+#include <chrono>
+#include <cmath> // std::isfinite
+#include <cstring> // std::memcpy
+#include <ctime>
+#include <iterator>
+#include <locale>
+#include <ostream>
+#include <type_traits>
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+
+// Check if std::chrono::local_t is available.
+#ifndef FMT_USE_LOCAL_TIME
+# ifdef __cpp_lib_chrono
+# define FMT_USE_LOCAL_TIME (__cpp_lib_chrono >= 201907L)
+# else
+# define FMT_USE_LOCAL_TIME 0
+# endif
+#endif
+
+// Check if std::chrono::utc_timestamp is available.
+#ifndef FMT_USE_UTC_TIME
+# ifdef __cpp_lib_chrono
+# define FMT_USE_UTC_TIME (__cpp_lib_chrono >= 201907L)
+# else
+# define FMT_USE_UTC_TIME 0
+# endif
+#endif
+
+// Enable tzset.
+#ifndef FMT_USE_TZSET
+// UWP doesn't provide _tzset.
+# if FMT_HAS_INCLUDE("winapifamily.h")
+# include <winapifamily.h>
+# endif
+# if defined(_WIN32) && (!defined(WINAPI_FAMILY) || \
+ (WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP))
+# define FMT_USE_TZSET 1
+# else
+# define FMT_USE_TZSET 0
+# endif
+#endif
+
+// Enable safe chrono durations, unless explicitly disabled.
+#ifndef FMT_SAFE_DURATION_CAST
+# define FMT_SAFE_DURATION_CAST 1
+#endif
+#if FMT_SAFE_DURATION_CAST
+
+// For conversion between std::chrono::durations without undefined
+// behaviour or erroneous results.
+// This is a stripped down version of duration_cast, for inclusion in fmt.
+// See https://github.com/pauldreik/safe_duration_cast
+//
+// Copyright Paul Dreik 2019
+namespace safe_duration_cast {
+
+template <typename To, typename From,
+ FMT_ENABLE_IF(!std::is_same<From, To>::value &&
+ std::numeric_limits<From>::is_signed ==
+ std::numeric_limits<To>::is_signed)>
+FMT_CONSTEXPR To lossless_integral_conversion(const From from, int& ec) {
+ ec = 0;
+ using F = std::numeric_limits<From>;
+ using T = std::numeric_limits<To>;
+ static_assert(F::is_integer, "From must be integral");
+ static_assert(T::is_integer, "To must be integral");
+
+ // A and B are both signed, or both unsigned.
+ if (detail::const_check(F::digits <= T::digits)) {
+ // From fits in To without any problem.
+ } else {
+ // From does not always fit in To, resort to a dynamic check.
+ if (from < (T::min)() || from > (T::max)()) {
+ // outside range.
+ ec = 1;
+ return {};
+ }
+ }
+ return static_cast<To>(from);
+}
+
+/**
+ * converts From to To, without loss. If the dynamic value of from
+ * can't be converted to To without loss, ec is set.
+ */
+template <typename To, typename From,
+ FMT_ENABLE_IF(!std::is_same<From, To>::value &&
+ std::numeric_limits<From>::is_signed !=
+ std::numeric_limits<To>::is_signed)>
+FMT_CONSTEXPR To lossless_integral_conversion(const From from, int& ec) {
+ ec = 0;
+ using F = std::numeric_limits<From>;
+ using T = std::numeric_limits<To>;
+ static_assert(F::is_integer, "From must be integral");
+ static_assert(T::is_integer, "To must be integral");
+
+ if (detail::const_check(F::is_signed && !T::is_signed)) {
+ // From may be negative, not allowed!
+ if (fmt::detail::is_negative(from)) {
+ ec = 1;
+ return {};
+ }
+ // From is positive. Can it always fit in To?
+ if (detail::const_check(F::digits > T::digits) &&
+ from > static_cast<From>(detail::max_value<To>())) {
+ ec = 1;
+ return {};
+ }
+ }
+
+ if (detail::const_check(!F::is_signed && T::is_signed &&
+ F::digits >= T::digits) &&
+ from > static_cast<From>(detail::max_value<To>())) {
+ ec = 1;
+ return {};
+ }
+ return static_cast<To>(from); // Lossless conversion.
+}
+
+template <typename To, typename From,
+ FMT_ENABLE_IF(std::is_same<From, To>::value)>
+FMT_CONSTEXPR To lossless_integral_conversion(const From from, int& ec) {
+ ec = 0;
+ return from;
+} // function
+
+// clang-format off
+/**
+ * converts From to To if possible, otherwise ec is set.
+ *
+ * input | output
+ * ---------------------------------|---------------
+ * NaN | NaN
+ * Inf | Inf
+ * normal, fits in output | converted (possibly lossy)
+ * normal, does not fit in output | ec is set
+ * subnormal | best effort
+ * -Inf | -Inf
+ */
+// clang-format on
+template <typename To, typename From,
+ FMT_ENABLE_IF(!std::is_same<From, To>::value)>
+FMT_CONSTEXPR To safe_float_conversion(const From from, int& ec) {
+ ec = 0;
+ using T = std::numeric_limits<To>;
+ static_assert(std::is_floating_point<From>::value, "From must be floating");
+ static_assert(std::is_floating_point<To>::value, "To must be floating");
+
+ // catch the only happy case
+ if (std::isfinite(from)) {
+ if (from >= T::lowest() && from <= (T::max)()) {
+ return static_cast<To>(from);
+ }
+ // not within range.
+ ec = 1;
+ return {};
+ }
+
+ // nan and inf will be preserved
+ return static_cast<To>(from);
+} // function
+
+template <typename To, typename From,
+ FMT_ENABLE_IF(std::is_same<From, To>::value)>
+FMT_CONSTEXPR To safe_float_conversion(const From from, int& ec) {
+ ec = 0;
+ static_assert(std::is_floating_point<From>::value, "From must be floating");
+ return from;
+}
+
+/**
+ * safe duration cast between integral durations
+ */
+template <typename To, typename FromRep, typename FromPeriod,
+ FMT_ENABLE_IF(std::is_integral<FromRep>::value),
+ FMT_ENABLE_IF(std::is_integral<typename To::rep>::value)>
+To safe_duration_cast(std::chrono::duration<FromRep, FromPeriod> from,
+ int& ec) {
+ using From = std::chrono::duration<FromRep, FromPeriod>;
+ ec = 0;
+ // the basic idea is that we need to convert from count() in the from type
+ // to count() in the To type, by multiplying it with this:
+ struct Factor
+ : std::ratio_divide<typename From::period, typename To::period> {};
+
+ static_assert(Factor::num > 0, "num must be positive");
+ static_assert(Factor::den > 0, "den must be positive");
+
+ // the conversion is like this: multiply from.count() with Factor::num
+ // /Factor::den and convert it to To::rep, all this without
+ // overflow/underflow. let's start by finding a suitable type that can hold
+ // both To, From and Factor::num
+ using IntermediateRep =
+ typename std::common_type<typename From::rep, typename To::rep,
+ decltype(Factor::num)>::type;
+
+ // safe conversion to IntermediateRep
+ IntermediateRep count =
+ lossless_integral_conversion<IntermediateRep>(from.count(), ec);
+ if (ec) return {};
+ // multiply with Factor::num without overflow or underflow
+ if (detail::const_check(Factor::num != 1)) {
+ const auto max1 = detail::max_value<IntermediateRep>() / Factor::num;
+ if (count > max1) {
+ ec = 1;
+ return {};
+ }
+ const auto min1 =
+ (std::numeric_limits<IntermediateRep>::min)() / Factor::num;
+ if (detail::const_check(!std::is_unsigned<IntermediateRep>::value) &&
+ count < min1) {
+ ec = 1;
+ return {};
+ }
+ count *= Factor::num;
+ }
+
+ if (detail::const_check(Factor::den != 1)) count /= Factor::den;
+ auto tocount = lossless_integral_conversion<typename To::rep>(count, ec);
+ return ec ? To() : To(tocount);
+}
+
+/**
+ * safe duration_cast between floating point durations
+ */
+template <typename To, typename FromRep, typename FromPeriod,
+ FMT_ENABLE_IF(std::is_floating_point<FromRep>::value),
+ FMT_ENABLE_IF(std::is_floating_point<typename To::rep>::value)>
+To safe_duration_cast(std::chrono::duration<FromRep, FromPeriod> from,
+ int& ec) {
+ using From = std::chrono::duration<FromRep, FromPeriod>;
+ ec = 0;
+ if (std::isnan(from.count())) {
+ // nan in, gives nan out. easy.
+ return To{std::numeric_limits<typename To::rep>::quiet_NaN()};
+ }
+ // maybe we should also check if from is denormal, and decide what to do about
+ // it.
+
+ // +-inf should be preserved.
+ if (std::isinf(from.count())) {
+ return To{from.count()};
+ }
+
+ // the basic idea is that we need to convert from count() in the from type
+ // to count() in the To type, by multiplying it with this:
+ struct Factor
+ : std::ratio_divide<typename From::period, typename To::period> {};
+
+ static_assert(Factor::num > 0, "num must be positive");
+ static_assert(Factor::den > 0, "den must be positive");
+
+ // the conversion is like this: multiply from.count() with Factor::num
+ // /Factor::den and convert it to To::rep, all this without
+ // overflow/underflow. let's start by finding a suitable type that can hold
+ // both To, From and Factor::num
+ using IntermediateRep =
+ typename std::common_type<typename From::rep, typename To::rep,
+ decltype(Factor::num)>::type;
+
+ // force conversion of From::rep -> IntermediateRep to be safe,
+ // even if it will never happen be narrowing in this context.
+ IntermediateRep count =
+ safe_float_conversion<IntermediateRep>(from.count(), ec);
+ if (ec) {
+ return {};
+ }
+
+ // multiply with Factor::num without overflow or underflow
+ if (detail::const_check(Factor::num != 1)) {
+ constexpr auto max1 = detail::max_value<IntermediateRep>() /
+ static_cast<IntermediateRep>(Factor::num);
+ if (count > max1) {
+ ec = 1;
+ return {};
+ }
+ constexpr auto min1 = std::numeric_limits<IntermediateRep>::lowest() /
+ static_cast<IntermediateRep>(Factor::num);
+ if (count < min1) {
+ ec = 1;
+ return {};
+ }
+ count *= static_cast<IntermediateRep>(Factor::num);
+ }
+
+ // this can't go wrong, right? den>0 is checked earlier.
+ if (detail::const_check(Factor::den != 1)) {
+ using common_t = typename std::common_type<IntermediateRep, intmax_t>::type;
+ count /= static_cast<common_t>(Factor::den);
+ }
+
+ // convert to the to type, safely
+ using ToRep = typename To::rep;
+
+ const ToRep tocount = safe_float_conversion<ToRep>(count, ec);
+ if (ec) {
+ return {};
+ }
+ return To{tocount};
+}
+} // namespace safe_duration_cast
+#endif
+
+// Prevents expansion of a preceding token as a function-style macro.
+// Usage: f FMT_NOMACRO()
+#define FMT_NOMACRO
+
+namespace detail {
+template <typename T = void> struct null {};
+inline null<> localtime_r FMT_NOMACRO(...) { return null<>(); }
+inline null<> localtime_s(...) { return null<>(); }
+inline null<> gmtime_r(...) { return null<>(); }
+inline null<> gmtime_s(...) { return null<>(); }
+
+inline const std::locale& get_classic_locale() {
+ static const auto& locale = std::locale::classic();
+ return locale;
+}
+
+template <typename CodeUnit> struct codecvt_result {
+ static constexpr const size_t max_size = 32;
+ CodeUnit buf[max_size];
+ CodeUnit* end;
+};
+template <typename CodeUnit>
+constexpr const size_t codecvt_result<CodeUnit>::max_size;
+
+template <typename CodeUnit>
+void write_codecvt(codecvt_result<CodeUnit>& out, string_view in_buf,
+ const std::locale& loc) {
+#if FMT_CLANG_VERSION
+# pragma clang diagnostic push
+# pragma clang diagnostic ignored "-Wdeprecated"
+ auto& f = std::use_facet<std::codecvt<CodeUnit, char, std::mbstate_t>>(loc);
+# pragma clang diagnostic pop
+#else
+ auto& f = std::use_facet<std::codecvt<CodeUnit, char, std::mbstate_t>>(loc);
+#endif
+ auto mb = std::mbstate_t();
+ const char* from_next = nullptr;
+ auto result = f.in(mb, in_buf.begin(), in_buf.end(), from_next,
+ std::begin(out.buf), std::end(out.buf), out.end);
+ if (result != std::codecvt_base::ok)
+ FMT_THROW(format_error("failed to format time"));
+}
+
+template <typename OutputIt>
+auto write_encoded_tm_str(OutputIt out, string_view in, const std::locale& loc)
+ -> OutputIt {
+ if (detail::is_utf8() && loc != get_classic_locale()) {
+ // char16_t and char32_t codecvts are broken in MSVC (linkage errors) and
+ // gcc-4.
+#if FMT_MSC_VERSION != 0 || \
+ (defined(__GLIBCXX__) && !defined(_GLIBCXX_USE_DUAL_ABI))
+ // The _GLIBCXX_USE_DUAL_ABI macro is always defined in libstdc++ from gcc-5
+ // and newer.
+ using code_unit = wchar_t;
+#else
+ using code_unit = char32_t;
+#endif
+
+ using unit_t = codecvt_result<code_unit>;
+ unit_t unit;
+ write_codecvt(unit, in, loc);
+ // In UTF-8 is used one to four one-byte code units.
+ unicode_to_utf8<code_unit, basic_memory_buffer<char, unit_t::max_size * 4>>
+ u;
+ if (!u.convert({unit.buf, to_unsigned(unit.end - unit.buf)}))
+ FMT_THROW(format_error("failed to format time"));
+ return copy_str<char>(u.c_str(), u.c_str() + u.size(), out);
+ }
+ return copy_str<char>(in.data(), in.data() + in.size(), out);
+}
+
+template <typename Char, typename OutputIt,
+ FMT_ENABLE_IF(!std::is_same<Char, char>::value)>
+auto write_tm_str(OutputIt out, string_view sv, const std::locale& loc)
+ -> OutputIt {
+ codecvt_result<Char> unit;
+ write_codecvt(unit, sv, loc);
+ return copy_str<Char>(unit.buf, unit.end, out);
+}
+
+template <typename Char, typename OutputIt,
+ FMT_ENABLE_IF(std::is_same<Char, char>::value)>
+auto write_tm_str(OutputIt out, string_view sv, const std::locale& loc)
+ -> OutputIt {
+ return write_encoded_tm_str(out, sv, loc);
+}
+
+template <typename Char>
+inline void do_write(buffer<Char>& buf, const std::tm& time,
+ const std::locale& loc, char format, char modifier) {
+ auto&& format_buf = formatbuf<std::basic_streambuf<Char>>(buf);
+ auto&& os = std::basic_ostream<Char>(&format_buf);
+ os.imbue(loc);
+ using iterator = std::ostreambuf_iterator<Char>;
+ const auto& facet = std::use_facet<std::time_put<Char, iterator>>(loc);
+ auto end = facet.put(os, os, Char(' '), &time, format, modifier);
+ if (end.failed()) FMT_THROW(format_error("failed to format time"));
+}
+
+template <typename Char, typename OutputIt,
+ FMT_ENABLE_IF(!std::is_same<Char, char>::value)>
+auto write(OutputIt out, const std::tm& time, const std::locale& loc,
+ char format, char modifier = 0) -> OutputIt {
+ auto&& buf = get_buffer<Char>(out);
+ do_write<Char>(buf, time, loc, format, modifier);
+ return get_iterator(buf, out);
+}
+
+template <typename Char, typename OutputIt,
+ FMT_ENABLE_IF(std::is_same<Char, char>::value)>
+auto write(OutputIt out, const std::tm& time, const std::locale& loc,
+ char format, char modifier = 0) -> OutputIt {
+ auto&& buf = basic_memory_buffer<Char>();
+ do_write<char>(buf, time, loc, format, modifier);
+ return write_encoded_tm_str(out, string_view(buf.data(), buf.size()), loc);
+}
+
+} // namespace detail
+
+FMT_BEGIN_EXPORT
+
+/**
+ Converts given time since epoch as ``std::time_t`` value into calendar time,
+ expressed in local time. Unlike ``std::localtime``, this function is
+ thread-safe on most platforms.
+ */
+inline std::tm localtime(std::time_t time) {
+ struct dispatcher {
+ std::time_t time_;
+ std::tm tm_;
+
+ dispatcher(std::time_t t) : time_(t) {}
+
+ bool run() {
+ using namespace fmt::detail;
+ return handle(localtime_r(&time_, &tm_));
+ }
+
+ bool handle(std::tm* tm) { return tm != nullptr; }
+
+ bool handle(detail::null<>) {
+ using namespace fmt::detail;
+ return fallback(localtime_s(&tm_, &time_));
+ }
+
+ bool fallback(int res) { return res == 0; }
+
+#if !FMT_MSC_VERSION
+ bool fallback(detail::null<>) {
+ using namespace fmt::detail;
+ std::tm* tm = std::localtime(&time_);
+ if (tm) tm_ = *tm;
+ return tm != nullptr;
+ }
+#endif
+ };
+ dispatcher lt(time);
+ // Too big time values may be unsupported.
+ if (!lt.run()) FMT_THROW(format_error("time_t value out of range"));
+ return lt.tm_;
+}
+
+#if FMT_USE_LOCAL_TIME
+template <typename Duration>
+inline auto localtime(std::chrono::local_time<Duration> time) -> std::tm {
+ return localtime(std::chrono::system_clock::to_time_t(
+ std::chrono::current_zone()->to_sys(time)));
+}
+#endif
+
+/**
+ Converts given time since epoch as ``std::time_t`` value into calendar time,
+ expressed in Coordinated Universal Time (UTC). Unlike ``std::gmtime``, this
+ function is thread-safe on most platforms.
+ */
+inline std::tm gmtime(std::time_t time) {
+ struct dispatcher {
+ std::time_t time_;
+ std::tm tm_;
+
+ dispatcher(std::time_t t) : time_(t) {}
+
+ bool run() {
+ using namespace fmt::detail;
+ return handle(gmtime_r(&time_, &tm_));
+ }
+
+ bool handle(std::tm* tm) { return tm != nullptr; }
+
+ bool handle(detail::null<>) {
+ using namespace fmt::detail;
+ return fallback(gmtime_s(&tm_, &time_));
+ }
+
+ bool fallback(int res) { return res == 0; }
+
+#if !FMT_MSC_VERSION
+ bool fallback(detail::null<>) {
+ std::tm* tm = std::gmtime(&time_);
+ if (tm) tm_ = *tm;
+ return tm != nullptr;
+ }
+#endif
+ };
+ dispatcher gt(time);
+ // Too big time values may be unsupported.
+ if (!gt.run()) FMT_THROW(format_error("time_t value out of range"));
+ return gt.tm_;
+}
+
+inline std::tm gmtime(
+ std::chrono::time_point<std::chrono::system_clock> time_point) {
+ return gmtime(std::chrono::system_clock::to_time_t(time_point));
+}
+
+FMT_BEGIN_DETAIL_NAMESPACE
+
+// DEPRECATED!
+template <typename Char>
+FMT_CONSTEXPR auto parse_align(const Char* begin, const Char* end,
+ format_specs<Char>& specs) -> const Char* {
+ FMT_ASSERT(begin != end, "");
+ auto align = align::none;
+ auto p = begin + code_point_length(begin);
+ if (end - p <= 0) p = begin;
+ for (;;) {
+ switch (to_ascii(*p)) {
+ case '<':
+ align = align::left;
+ break;
+ case '>':
+ align = align::right;
+ break;
+ case '^':
+ align = align::center;
+ break;
+ }
+ if (align != align::none) {
+ if (p != begin) {
+ auto c = *begin;
+ if (c == '}') return begin;
+ if (c == '{') {
+ throw_format_error("invalid fill character '{'");
+ return begin;
+ }
+ specs.fill = {begin, to_unsigned(p - begin)};
+ begin = p + 1;
+ } else {
+ ++begin;
+ }
+ break;
+ } else if (p == begin) {
+ break;
+ }
+ p = begin;
+ }
+ specs.align = align;
+ return begin;
+}
+
+// Writes two-digit numbers a, b and c separated by sep to buf.
+// The method by Pavel Novikov based on
+// https://johnnylee-sde.github.io/Fast-unsigned-integer-to-time-string/.
+inline void write_digit2_separated(char* buf, unsigned a, unsigned b,
+ unsigned c, char sep) {
+ unsigned long long digits =
+ a | (b << 24) | (static_cast<unsigned long long>(c) << 48);
+ // Convert each value to BCD.
+ // We have x = a * 10 + b and we want to convert it to BCD y = a * 16 + b.
+ // The difference is
+ // y - x = a * 6
+ // a can be found from x:
+ // a = floor(x / 10)
+ // then
+ // y = x + a * 6 = x + floor(x / 10) * 6
+ // floor(x / 10) is (x * 205) >> 11 (needs 16 bits).
+ digits += (((digits * 205) >> 11) & 0x000f00000f00000f) * 6;
+ // Put low nibbles to high bytes and high nibbles to low bytes.
+ digits = ((digits & 0x00f00000f00000f0) >> 4) |
+ ((digits & 0x000f00000f00000f) << 8);
+ auto usep = static_cast<unsigned long long>(sep);
+ // Add ASCII '0' to each digit byte and insert separators.
+ digits |= 0x3030003030003030 | (usep << 16) | (usep << 40);
+
+ constexpr const size_t len = 8;
+ if (const_check(is_big_endian())) {
+ char tmp[len];
+ std::memcpy(tmp, &digits, len);
+ std::reverse_copy(tmp, tmp + len, buf);
+ } else {
+ std::memcpy(buf, &digits, len);
+ }
+}
+
+template <typename Period> FMT_CONSTEXPR inline const char* get_units() {
+ if (std::is_same<Period, std::atto>::value) return "as";
+ if (std::is_same<Period, std::femto>::value) return "fs";
+ if (std::is_same<Period, std::pico>::value) return "ps";
+ if (std::is_same<Period, std::nano>::value) return "ns";
+ if (std::is_same<Period, std::micro>::value) return "µs";
+ if (std::is_same<Period, std::milli>::value) return "ms";
+ if (std::is_same<Period, std::centi>::value) return "cs";
+ if (std::is_same<Period, std::deci>::value) return "ds";
+ if (std::is_same<Period, std::ratio<1>>::value) return "s";
+ if (std::is_same<Period, std::deca>::value) return "das";
+ if (std::is_same<Period, std::hecto>::value) return "hs";
+ if (std::is_same<Period, std::kilo>::value) return "ks";
+ if (std::is_same<Period, std::mega>::value) return "Ms";
+ if (std::is_same<Period, std::giga>::value) return "Gs";
+ if (std::is_same<Period, std::tera>::value) return "Ts";
+ if (std::is_same<Period, std::peta>::value) return "Ps";
+ if (std::is_same<Period, std::exa>::value) return "Es";
+ if (std::is_same<Period, std::ratio<60>>::value) return "m";
+ if (std::is_same<Period, std::ratio<3600>>::value) return "h";
+ return nullptr;
+}
+
+enum class numeric_system {
+ standard,
+ // Alternative numeric system, e.g. 十二 instead of 12 in ja_JP locale.
+ alternative
+};
+
+// Glibc extensions for formatting numeric values.
+enum class pad_type {
+ unspecified,
+ // Do not pad a numeric result string.
+ none,
+ // Pad a numeric result string with zeros even if the conversion specifier
+ // character uses space-padding by default.
+ zero,
+ // Pad a numeric result string with spaces.
+ space,
+};
+
+template <typename OutputIt>
+auto write_padding(OutputIt out, pad_type pad, int width) -> OutputIt {
+ if (pad == pad_type::none) return out;
+ return std::fill_n(out, width, pad == pad_type::space ? ' ' : '0');
+}
+
+template <typename OutputIt>
+auto write_padding(OutputIt out, pad_type pad) -> OutputIt {
+ if (pad != pad_type::none) *out++ = pad == pad_type::space ? ' ' : '0';
+ return out;
+}
+
+// Parses a put_time-like format string and invokes handler actions.
+template <typename Char, typename Handler>
+FMT_CONSTEXPR const Char* parse_chrono_format(const Char* begin,
+ const Char* end,
+ Handler&& handler) {
+ if (begin == end || *begin == '}') return begin;
+ if (*begin != '%') FMT_THROW(format_error("invalid format"));
+ auto ptr = begin;
+ pad_type pad = pad_type::unspecified;
+ while (ptr != end) {
+ auto c = *ptr;
+ if (c == '}') break;
+ if (c != '%') {
+ ++ptr;
+ continue;
+ }
+ if (begin != ptr) handler.on_text(begin, ptr);
+ ++ptr; // consume '%'
+ if (ptr == end) FMT_THROW(format_error("invalid format"));
+ c = *ptr;
+ switch (c) {
+ case '_':
+ pad = pad_type::space;
+ ++ptr;
+ break;
+ case '-':
+ pad = pad_type::none;
+ ++ptr;
+ break;
+ case '0':
+ pad = pad_type::zero;
+ ++ptr;
+ break;
+ }
+ if (ptr == end) FMT_THROW(format_error("invalid format"));
+ c = *ptr++;
+ switch (c) {
+ case '%':
+ handler.on_text(ptr - 1, ptr);
+ break;
+ case 'n': {
+ const Char newline[] = {'\n'};
+ handler.on_text(newline, newline + 1);
+ break;
+ }
+ case 't': {
+ const Char tab[] = {'\t'};
+ handler.on_text(tab, tab + 1);
+ break;
+ }
+ // Year:
+ case 'Y':
+ handler.on_year(numeric_system::standard);
+ break;
+ case 'y':
+ handler.on_short_year(numeric_system::standard);
+ break;
+ case 'C':
+ handler.on_century(numeric_system::standard);
+ break;
+ case 'G':
+ handler.on_iso_week_based_year();
+ break;
+ case 'g':
+ handler.on_iso_week_based_short_year();
+ break;
+ // Day of the week:
+ case 'a':
+ handler.on_abbr_weekday();
+ break;
+ case 'A':
+ handler.on_full_weekday();
+ break;
+ case 'w':
+ handler.on_dec0_weekday(numeric_system::standard);
+ break;
+ case 'u':
+ handler.on_dec1_weekday(numeric_system::standard);
+ break;
+ // Month:
+ case 'b':
+ case 'h':
+ handler.on_abbr_month();
+ break;
+ case 'B':
+ handler.on_full_month();
+ break;
+ case 'm':
+ handler.on_dec_month(numeric_system::standard);
+ break;
+ // Day of the year/month:
+ case 'U':
+ handler.on_dec0_week_of_year(numeric_system::standard);
+ break;
+ case 'W':
+ handler.on_dec1_week_of_year(numeric_system::standard);
+ break;
+ case 'V':
+ handler.on_iso_week_of_year(numeric_system::standard);
+ break;
+ case 'j':
+ handler.on_day_of_year();
+ break;
+ case 'd':
+ handler.on_day_of_month(numeric_system::standard);
+ break;
+ case 'e':
+ handler.on_day_of_month_space(numeric_system::standard);
+ break;
+ // Hour, minute, second:
+ case 'H':
+ handler.on_24_hour(numeric_system::standard, pad);
+ break;
+ case 'I':
+ handler.on_12_hour(numeric_system::standard, pad);
+ break;
+ case 'M':
+ handler.on_minute(numeric_system::standard, pad);
+ break;
+ case 'S':
+ handler.on_second(numeric_system::standard, pad);
+ break;
+ // Other:
+ case 'c':
+ handler.on_datetime(numeric_system::standard);
+ break;
+ case 'x':
+ handler.on_loc_date(numeric_system::standard);
+ break;
+ case 'X':
+ handler.on_loc_time(numeric_system::standard);
+ break;
+ case 'D':
+ handler.on_us_date();
+ break;
+ case 'F':
+ handler.on_iso_date();
+ break;
+ case 'r':
+ handler.on_12_hour_time();
+ break;
+ case 'R':
+ handler.on_24_hour_time();
+ break;
+ case 'T':
+ handler.on_iso_time();
+ break;
+ case 'p':
+ handler.on_am_pm();
+ break;
+ case 'Q':
+ handler.on_duration_value();
+ break;
+ case 'q':
+ handler.on_duration_unit();
+ break;
+ case 'z':
+ handler.on_utc_offset(numeric_system::standard);
+ break;
+ case 'Z':
+ handler.on_tz_name();
+ break;
+ // Alternative representation:
+ case 'E': {
+ if (ptr == end) FMT_THROW(format_error("invalid format"));
+ c = *ptr++;
+ switch (c) {
+ case 'Y':
+ handler.on_year(numeric_system::alternative);
+ break;
+ case 'y':
+ handler.on_offset_year();
+ break;
+ case 'C':
+ handler.on_century(numeric_system::alternative);
+ break;
+ case 'c':
+ handler.on_datetime(numeric_system::alternative);
+ break;
+ case 'x':
+ handler.on_loc_date(numeric_system::alternative);
+ break;
+ case 'X':
+ handler.on_loc_time(numeric_system::alternative);
+ break;
+ case 'z':
+ handler.on_utc_offset(numeric_system::alternative);
+ break;
+ default:
+ FMT_THROW(format_error("invalid format"));
+ }
+ break;
+ }
+ case 'O':
+ if (ptr == end) FMT_THROW(format_error("invalid format"));
+ c = *ptr++;
+ switch (c) {
+ case 'y':
+ handler.on_short_year(numeric_system::alternative);
+ break;
+ case 'm':
+ handler.on_dec_month(numeric_system::alternative);
+ break;
+ case 'U':
+ handler.on_dec0_week_of_year(numeric_system::alternative);
+ break;
+ case 'W':
+ handler.on_dec1_week_of_year(numeric_system::alternative);
+ break;
+ case 'V':
+ handler.on_iso_week_of_year(numeric_system::alternative);
+ break;
+ case 'd':
+ handler.on_day_of_month(numeric_system::alternative);
+ break;
+ case 'e':
+ handler.on_day_of_month_space(numeric_system::alternative);
+ break;
+ case 'w':
+ handler.on_dec0_weekday(numeric_system::alternative);
+ break;
+ case 'u':
+ handler.on_dec1_weekday(numeric_system::alternative);
+ break;
+ case 'H':
+ handler.on_24_hour(numeric_system::alternative, pad);
+ break;
+ case 'I':
+ handler.on_12_hour(numeric_system::alternative, pad);
+ break;
+ case 'M':
+ handler.on_minute(numeric_system::alternative, pad);
+ break;
+ case 'S':
+ handler.on_second(numeric_system::alternative, pad);
+ break;
+ case 'z':
+ handler.on_utc_offset(numeric_system::alternative);
+ break;
+ default:
+ FMT_THROW(format_error("invalid format"));
+ }
+ break;
+ default:
+ FMT_THROW(format_error("invalid format"));
+ }
+ begin = ptr;
+ }
+ if (begin != ptr) handler.on_text(begin, ptr);
+ return ptr;
+}
+
+template <typename Derived> struct null_chrono_spec_handler {
+ FMT_CONSTEXPR void unsupported() {
+ static_cast<Derived*>(this)->unsupported();
+ }
+ FMT_CONSTEXPR void on_year(numeric_system) { unsupported(); }
+ FMT_CONSTEXPR void on_short_year(numeric_system) { unsupported(); }
+ FMT_CONSTEXPR void on_offset_year() { unsupported(); }
+ FMT_CONSTEXPR void on_century(numeric_system) { unsupported(); }
+ FMT_CONSTEXPR void on_iso_week_based_year() { unsupported(); }
+ FMT_CONSTEXPR void on_iso_week_based_short_year() { unsupported(); }
+ FMT_CONSTEXPR void on_abbr_weekday() { unsupported(); }
+ FMT_CONSTEXPR void on_full_weekday() { unsupported(); }
+ FMT_CONSTEXPR void on_dec0_weekday(numeric_system) { unsupported(); }
+ FMT_CONSTEXPR void on_dec1_weekday(numeric_system) { unsupported(); }
+ FMT_CONSTEXPR void on_abbr_month() { unsupported(); }
+ FMT_CONSTEXPR void on_full_month() { unsupported(); }
+ FMT_CONSTEXPR void on_dec_month(numeric_system) { unsupported(); }
+ FMT_CONSTEXPR void on_dec0_week_of_year(numeric_system) { unsupported(); }
+ FMT_CONSTEXPR void on_dec1_week_of_year(numeric_system) { unsupported(); }
+ FMT_CONSTEXPR void on_iso_week_of_year(numeric_system) { unsupported(); }
+ FMT_CONSTEXPR void on_day_of_year() { unsupported(); }
+ FMT_CONSTEXPR void on_day_of_month(numeric_system) { unsupported(); }
+ FMT_CONSTEXPR void on_day_of_month_space(numeric_system) { unsupported(); }
+ FMT_CONSTEXPR void on_24_hour(numeric_system) { unsupported(); }
+ FMT_CONSTEXPR void on_12_hour(numeric_system) { unsupported(); }
+ FMT_CONSTEXPR void on_minute(numeric_system) { unsupported(); }
+ FMT_CONSTEXPR void on_second(numeric_system) { unsupported(); }
+ FMT_CONSTEXPR void on_datetime(numeric_system) { unsupported(); }
+ FMT_CONSTEXPR void on_loc_date(numeric_system) { unsupported(); }
+ FMT_CONSTEXPR void on_loc_time(numeric_system) { unsupported(); }
+ FMT_CONSTEXPR void on_us_date() { unsupported(); }
+ FMT_CONSTEXPR void on_iso_date() { unsupported(); }
+ FMT_CONSTEXPR void on_12_hour_time() { unsupported(); }
+ FMT_CONSTEXPR void on_24_hour_time() { unsupported(); }
+ FMT_CONSTEXPR void on_iso_time() { unsupported(); }
+ FMT_CONSTEXPR void on_am_pm() { unsupported(); }
+ FMT_CONSTEXPR void on_duration_value() { unsupported(); }
+ FMT_CONSTEXPR void on_duration_unit() { unsupported(); }
+ FMT_CONSTEXPR void on_utc_offset(numeric_system) { unsupported(); }
+ FMT_CONSTEXPR void on_tz_name() { unsupported(); }
+};
+
+struct tm_format_checker : null_chrono_spec_handler<tm_format_checker> {
+ FMT_NORETURN void unsupported() { FMT_THROW(format_error("no format")); }
+
+ template <typename Char>
+ FMT_CONSTEXPR void on_text(const Char*, const Char*) {}
+ FMT_CONSTEXPR void on_year(numeric_system) {}
+ FMT_CONSTEXPR void on_short_year(numeric_system) {}
+ FMT_CONSTEXPR void on_offset_year() {}
+ FMT_CONSTEXPR void on_century(numeric_system) {}
+ FMT_CONSTEXPR void on_iso_week_based_year() {}
+ FMT_CONSTEXPR void on_iso_week_based_short_year() {}
+ FMT_CONSTEXPR void on_abbr_weekday() {}
+ FMT_CONSTEXPR void on_full_weekday() {}
+ FMT_CONSTEXPR void on_dec0_weekday(numeric_system) {}
+ FMT_CONSTEXPR void on_dec1_weekday(numeric_system) {}
+ FMT_CONSTEXPR void on_abbr_month() {}
+ FMT_CONSTEXPR void on_full_month() {}
+ FMT_CONSTEXPR void on_dec_month(numeric_system) {}
+ FMT_CONSTEXPR void on_dec0_week_of_year(numeric_system) {}
+ FMT_CONSTEXPR void on_dec1_week_of_year(numeric_system) {}
+ FMT_CONSTEXPR void on_iso_week_of_year(numeric_system) {}
+ FMT_CONSTEXPR void on_day_of_year() {}
+ FMT_CONSTEXPR void on_day_of_month(numeric_system) {}
+ FMT_CONSTEXPR void on_day_of_month_space(numeric_system) {}
+ FMT_CONSTEXPR void on_24_hour(numeric_system, pad_type) {}
+ FMT_CONSTEXPR void on_12_hour(numeric_system, pad_type) {}
+ FMT_CONSTEXPR void on_minute(numeric_system, pad_type) {}
+ FMT_CONSTEXPR void on_second(numeric_system, pad_type) {}
+ FMT_CONSTEXPR void on_datetime(numeric_system) {}
+ FMT_CONSTEXPR void on_loc_date(numeric_system) {}
+ FMT_CONSTEXPR void on_loc_time(numeric_system) {}
+ FMT_CONSTEXPR void on_us_date() {}
+ FMT_CONSTEXPR void on_iso_date() {}
+ FMT_CONSTEXPR void on_12_hour_time() {}
+ FMT_CONSTEXPR void on_24_hour_time() {}
+ FMT_CONSTEXPR void on_iso_time() {}
+ FMT_CONSTEXPR void on_am_pm() {}
+ FMT_CONSTEXPR void on_utc_offset(numeric_system) {}
+ FMT_CONSTEXPR void on_tz_name() {}
+};
+
+inline const char* tm_wday_full_name(int wday) {
+ static constexpr const char* full_name_list[] = {
+ "Sunday", "Monday", "Tuesday", "Wednesday",
+ "Thursday", "Friday", "Saturday"};
+ return wday >= 0 && wday <= 6 ? full_name_list[wday] : "?";
+}
+inline const char* tm_wday_short_name(int wday) {
+ static constexpr const char* short_name_list[] = {"Sun", "Mon", "Tue", "Wed",
+ "Thu", "Fri", "Sat"};
+ return wday >= 0 && wday <= 6 ? short_name_list[wday] : "???";
+}
+
+inline const char* tm_mon_full_name(int mon) {
+ static constexpr const char* full_name_list[] = {
+ "January", "February", "March", "April", "May", "June",
+ "July", "August", "September", "October", "November", "December"};
+ return mon >= 0 && mon <= 11 ? full_name_list[mon] : "?";
+}
+inline const char* tm_mon_short_name(int mon) {
+ static constexpr const char* short_name_list[] = {
+ "Jan", "Feb", "Mar", "Apr", "May", "Jun",
+ "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
+ };
+ return mon >= 0 && mon <= 11 ? short_name_list[mon] : "???";
+}
+
+template <typename T, typename = void>
+struct has_member_data_tm_gmtoff : std::false_type {};
+template <typename T>
+struct has_member_data_tm_gmtoff<T, void_t<decltype(T::tm_gmtoff)>>
+ : std::true_type {};
+
+template <typename T, typename = void>
+struct has_member_data_tm_zone : std::false_type {};
+template <typename T>
+struct has_member_data_tm_zone<T, void_t<decltype(T::tm_zone)>>
+ : std::true_type {};
+
+#if FMT_USE_TZSET
+inline void tzset_once() {
+ static bool init = []() -> bool {
+ _tzset();
+ return true;
+ }();
+ ignore_unused(init);
+}
+#endif
+
+// Converts value to Int and checks that it's in the range [0, upper).
+template <typename T, typename Int, FMT_ENABLE_IF(std::is_integral<T>::value)>
+inline Int to_nonnegative_int(T value, Int upper) {
+ FMT_ASSERT(std::is_unsigned<Int>::value ||
+ (value >= 0 && to_unsigned(value) <= to_unsigned(upper)),
+ "invalid value");
+ (void)upper;
+ return static_cast<Int>(value);
+}
+template <typename T, typename Int, FMT_ENABLE_IF(!std::is_integral<T>::value)>
+inline Int to_nonnegative_int(T value, Int upper) {
+ if (value < 0 || value > static_cast<T>(upper))
+ FMT_THROW(format_error("invalid value"));
+ return static_cast<Int>(value);
+}
+
+constexpr long long pow10(std::uint32_t n) {
+ return n == 0 ? 1 : 10 * pow10(n - 1);
+}
+
+// Counts the number of fractional digits in the range [0, 18] according to the
+// C++20 spec. If more than 18 fractional digits are required then returns 6 for
+// microseconds precision.
+template <long long Num, long long Den, int N = 0,
+ bool Enabled = (N < 19) && (Num <= max_value<long long>() / 10)>
+struct count_fractional_digits {
+ static constexpr int value =
+ Num % Den == 0 ? N : count_fractional_digits<Num * 10, Den, N + 1>::value;
+};
+
+// Base case that doesn't instantiate any more templates
+// in order to avoid overflow.
+template <long long Num, long long Den, int N>
+struct count_fractional_digits<Num, Den, N, false> {
+ static constexpr int value = (Num % Den == 0) ? N : 6;
+};
+
+// Format subseconds which are given as an integer type with an appropriate
+// number of digits.
+template <typename Char, typename OutputIt, typename Duration>
+void write_fractional_seconds(OutputIt& out, Duration d, int precision = -1) {
+ constexpr auto num_fractional_digits =
+ count_fractional_digits<Duration::period::num,
+ Duration::period::den>::value;
+
+ using subsecond_precision = std::chrono::duration<
+ typename std::common_type<typename Duration::rep,
+ std::chrono::seconds::rep>::type,
+ std::ratio<1, detail::pow10(num_fractional_digits)>>;
+
+ const auto fractional =
+ d - std::chrono::duration_cast<std::chrono::seconds>(d);
+ const auto subseconds =
+ std::chrono::treat_as_floating_point<
+ typename subsecond_precision::rep>::value
+ ? fractional.count()
+ : std::chrono::duration_cast<subsecond_precision>(fractional).count();
+ auto n = static_cast<uint32_or_64_or_128_t<long long>>(subseconds);
+ const int num_digits = detail::count_digits(n);
+
+ int leading_zeroes = (std::max)(0, num_fractional_digits - num_digits);
+ if (precision < 0) {
+ FMT_ASSERT(!std::is_floating_point<typename Duration::rep>::value, "");
+ if (std::ratio_less<typename subsecond_precision::period,
+ std::chrono::seconds::period>::value) {
+ *out++ = '.';
+ out = std::fill_n(out, leading_zeroes, '0');
+ out = format_decimal<Char>(out, n, num_digits).end;
+ }
+ } else {
+ *out++ = '.';
+ leading_zeroes = (std::min)(leading_zeroes, precision);
+ out = std::fill_n(out, leading_zeroes, '0');
+ int remaining = precision - leading_zeroes;
+ if (remaining != 0 && remaining < num_digits) {
+ n /= to_unsigned(detail::pow10(to_unsigned(num_digits - remaining)));
+ out = format_decimal<Char>(out, n, remaining).end;
+ return;
+ }
+ out = format_decimal<Char>(out, n, num_digits).end;
+ remaining -= num_digits;
+ out = std::fill_n(out, remaining, '0');
+ }
+}
+
+// Format subseconds which are given as a floating point type with an
+// appropriate number of digits. We cannot pass the Duration here, as we
+// explicitly need to pass the Rep value in the chrono_formatter.
+template <typename Duration>
+void write_floating_seconds(memory_buffer& buf, Duration duration,
+ int num_fractional_digits = -1) {
+ using rep = typename Duration::rep;
+ FMT_ASSERT(std::is_floating_point<rep>::value, "");
+
+ auto val = duration.count();
+
+ if (num_fractional_digits < 0) {
+ // For `std::round` with fallback to `round`:
+ // On some toolchains `std::round` is not available (e.g. GCC 6).
+ using namespace std;
+ num_fractional_digits =
+ count_fractional_digits<Duration::period::num,
+ Duration::period::den>::value;
+ if (num_fractional_digits < 6 && static_cast<rep>(round(val)) != val)
+ num_fractional_digits = 6;
+ }
+
+ format_to(std::back_inserter(buf), FMT_STRING("{:.{}f}"),
+ std::fmod(val * static_cast<rep>(Duration::period::num) /
+ static_cast<rep>(Duration::period::den),
+ static_cast<rep>(60)),
+ num_fractional_digits);
+}
+
+template <typename OutputIt, typename Char,
+ typename Duration = std::chrono::seconds>
+class tm_writer {
+ private:
+ static constexpr int days_per_week = 7;
+
+ const std::locale& loc_;
+ const bool is_classic_;
+ OutputIt out_;
+ const Duration* subsecs_;
+ const std::tm& tm_;
+
+ auto tm_sec() const noexcept -> int {
+ FMT_ASSERT(tm_.tm_sec >= 0 && tm_.tm_sec <= 61, "");
+ return tm_.tm_sec;
+ }
+ auto tm_min() const noexcept -> int {
+ FMT_ASSERT(tm_.tm_min >= 0 && tm_.tm_min <= 59, "");
+ return tm_.tm_min;
+ }
+ auto tm_hour() const noexcept -> int {
+ FMT_ASSERT(tm_.tm_hour >= 0 && tm_.tm_hour <= 23, "");
+ return tm_.tm_hour;
+ }
+ auto tm_mday() const noexcept -> int {
+ FMT_ASSERT(tm_.tm_mday >= 1 && tm_.tm_mday <= 31, "");
+ return tm_.tm_mday;
+ }
+ auto tm_mon() const noexcept -> int {
+ FMT_ASSERT(tm_.tm_mon >= 0 && tm_.tm_mon <= 11, "");
+ return tm_.tm_mon;
+ }
+ auto tm_year() const noexcept -> long long { return 1900ll + tm_.tm_year; }
+ auto tm_wday() const noexcept -> int {
+ FMT_ASSERT(tm_.tm_wday >= 0 && tm_.tm_wday <= 6, "");
+ return tm_.tm_wday;
+ }
+ auto tm_yday() const noexcept -> int {
+ FMT_ASSERT(tm_.tm_yday >= 0 && tm_.tm_yday <= 365, "");
+ return tm_.tm_yday;
+ }
+
+ auto tm_hour12() const noexcept -> int {
+ const auto h = tm_hour();
+ const auto z = h < 12 ? h : h - 12;
+ return z == 0 ? 12 : z;
+ }
+
+ // POSIX and the C Standard are unclear or inconsistent about what %C and %y
+ // do if the year is negative or exceeds 9999. Use the convention that %C
+ // concatenated with %y yields the same output as %Y, and that %Y contains at
+ // least 4 characters, with more only if necessary.
+ auto split_year_lower(long long year) const noexcept -> int {
+ auto l = year % 100;
+ if (l < 0) l = -l; // l in [0, 99]
+ return static_cast<int>(l);
+ }
+
+ // Algorithm:
+ // https://en.wikipedia.org/wiki/ISO_week_date#Calculating_the_week_number_from_a_month_and_day_of_the_month_or_ordinal_date
+ auto iso_year_weeks(long long curr_year) const noexcept -> int {
+ const auto prev_year = curr_year - 1;
+ const auto curr_p =
+ (curr_year + curr_year / 4 - curr_year / 100 + curr_year / 400) %
+ days_per_week;
+ const auto prev_p =
+ (prev_year + prev_year / 4 - prev_year / 100 + prev_year / 400) %
+ days_per_week;
+ return 52 + ((curr_p == 4 || prev_p == 3) ? 1 : 0);
+ }
+ auto iso_week_num(int tm_yday, int tm_wday) const noexcept -> int {
+ return (tm_yday + 11 - (tm_wday == 0 ? days_per_week : tm_wday)) /
+ days_per_week;
+ }
+ auto tm_iso_week_year() const noexcept -> long long {
+ const auto year = tm_year();
+ const auto w = iso_week_num(tm_yday(), tm_wday());
+ if (w < 1) return year - 1;
+ if (w > iso_year_weeks(year)) return year + 1;
+ return year;
+ }
+ auto tm_iso_week_of_year() const noexcept -> int {
+ const auto year = tm_year();
+ const auto w = iso_week_num(tm_yday(), tm_wday());
+ if (w < 1) return iso_year_weeks(year - 1);
+ if (w > iso_year_weeks(year)) return 1;
+ return w;
+ }
+
+ void write1(int value) {
+ *out_++ = static_cast<char>('0' + to_unsigned(value) % 10);
+ }
+ void write2(int value) {
+ const char* d = digits2(to_unsigned(value) % 100);
+ *out_++ = *d++;
+ *out_++ = *d;
+ }
+ void write2(int value, pad_type pad) {
+ unsigned int v = to_unsigned(value) % 100;
+ if (v >= 10) {
+ const char* d = digits2(v);
+ *out_++ = *d++;
+ *out_++ = *d;
+ } else {
+ out_ = detail::write_padding(out_, pad);
+ *out_++ = static_cast<char>('0' + v);
+ }
+ }
+
+ void write_year_extended(long long year) {
+ // At least 4 characters.
+ int width = 4;
+ if (year < 0) {
+ *out_++ = '-';
+ year = 0 - year;
+ --width;
+ }
+ uint32_or_64_or_128_t<long long> n = to_unsigned(year);
+ const int num_digits = count_digits(n);
+ if (width > num_digits) out_ = std::fill_n(out_, width - num_digits, '0');
+ out_ = format_decimal<Char>(out_, n, num_digits).end;
+ }
+ void write_year(long long year) {
+ if (year >= 0 && year < 10000) {
+ write2(static_cast<int>(year / 100));
+ write2(static_cast<int>(year % 100));
+ } else {
+ write_year_extended(year);
+ }
+ }
+
+ void write_utc_offset(long offset, numeric_system ns) {
+ if (offset < 0) {
+ *out_++ = '-';
+ offset = -offset;
+ } else {
+ *out_++ = '+';
+ }
+ offset /= 60;
+ write2(static_cast<int>(offset / 60));
+ if (ns != numeric_system::standard) *out_++ = ':';
+ write2(static_cast<int>(offset % 60));
+ }
+ template <typename T, FMT_ENABLE_IF(has_member_data_tm_gmtoff<T>::value)>
+ void format_utc_offset_impl(const T& tm, numeric_system ns) {
+ write_utc_offset(tm.tm_gmtoff, ns);
+ }
+ template <typename T, FMT_ENABLE_IF(!has_member_data_tm_gmtoff<T>::value)>
+ void format_utc_offset_impl(const T& tm, numeric_system ns) {
+#if defined(_WIN32) && defined(_UCRT)
+# if FMT_USE_TZSET
+ tzset_once();
+# endif
+ long offset = 0;
+ _get_timezone(&offset);
+ if (tm.tm_isdst) {
+ long dstbias = 0;
+ _get_dstbias(&dstbias);
+ offset += dstbias;
+ }
+ write_utc_offset(-offset, ns);
+#else
+ if (ns == numeric_system::standard) return format_localized('z');
+
+ // Extract timezone offset from timezone conversion functions.
+ std::tm gtm = tm;
+ std::time_t gt = std::mktime(&gtm);
+ std::tm ltm = gmtime(gt);
+ std::time_t lt = std::mktime(&ltm);
+ long offset = gt - lt;
+ write_utc_offset(offset, ns);
+#endif
+ }
+
+ template <typename T, FMT_ENABLE_IF(has_member_data_tm_zone<T>::value)>
+ void format_tz_name_impl(const T& tm) {
+ if (is_classic_)
+ out_ = write_tm_str<Char>(out_, tm.tm_zone, loc_);
+ else
+ format_localized('Z');
+ }
+ template <typename T, FMT_ENABLE_IF(!has_member_data_tm_zone<T>::value)>
+ void format_tz_name_impl(const T&) {
+ format_localized('Z');
+ }
+
+ void format_localized(char format, char modifier = 0) {
+ out_ = write<Char>(out_, tm_, loc_, format, modifier);
+ }
+
+ public:
+ tm_writer(const std::locale& loc, OutputIt out, const std::tm& tm,
+ const Duration* subsecs = nullptr)
+ : loc_(loc),
+ is_classic_(loc_ == get_classic_locale()),
+ out_(out),
+ subsecs_(subsecs),
+ tm_(tm) {}
+
+ OutputIt out() const { return out_; }
+
+ FMT_CONSTEXPR void on_text(const Char* begin, const Char* end) {
+ out_ = copy_str<Char>(begin, end, out_);
+ }
+
+ void on_abbr_weekday() {
+ if (is_classic_)
+ out_ = write(out_, tm_wday_short_name(tm_wday()));
+ else
+ format_localized('a');
+ }
+ void on_full_weekday() {
+ if (is_classic_)
+ out_ = write(out_, tm_wday_full_name(tm_wday()));
+ else
+ format_localized('A');
+ }
+ void on_dec0_weekday(numeric_system ns) {
+ if (is_classic_ || ns == numeric_system::standard) return write1(tm_wday());
+ format_localized('w', 'O');
+ }
+ void on_dec1_weekday(numeric_system ns) {
+ if (is_classic_ || ns == numeric_system::standard) {
+ auto wday = tm_wday();
+ write1(wday == 0 ? days_per_week : wday);
+ } else {
+ format_localized('u', 'O');
+ }
+ }
+
+ void on_abbr_month() {
+ if (is_classic_)
+ out_ = write(out_, tm_mon_short_name(tm_mon()));
+ else
+ format_localized('b');
+ }
+ void on_full_month() {
+ if (is_classic_)
+ out_ = write(out_, tm_mon_full_name(tm_mon()));
+ else
+ format_localized('B');
+ }
+
+ void on_datetime(numeric_system ns) {
+ if (is_classic_) {
+ on_abbr_weekday();
+ *out_++ = ' ';
+ on_abbr_month();
+ *out_++ = ' ';
+ on_day_of_month_space(numeric_system::standard);
+ *out_++ = ' ';
+ on_iso_time();
+ *out_++ = ' ';
+ on_year(numeric_system::standard);
+ } else {
+ format_localized('c', ns == numeric_system::standard ? '\0' : 'E');
+ }
+ }
+ void on_loc_date(numeric_system ns) {
+ if (is_classic_)
+ on_us_date();
+ else
+ format_localized('x', ns == numeric_system::standard ? '\0' : 'E');
+ }
+ void on_loc_time(numeric_system ns) {
+ if (is_classic_)
+ on_iso_time();
+ else
+ format_localized('X', ns == numeric_system::standard ? '\0' : 'E');
+ }
+ void on_us_date() {
+ char buf[8];
+ write_digit2_separated(buf, to_unsigned(tm_mon() + 1),
+ to_unsigned(tm_mday()),
+ to_unsigned(split_year_lower(tm_year())), '/');
+ out_ = copy_str<Char>(std::begin(buf), std::end(buf), out_);
+ }
+ void on_iso_date() {
+ auto year = tm_year();
+ char buf[10];
+ size_t offset = 0;
+ if (year >= 0 && year < 10000) {
+ copy2(buf, digits2(static_cast<size_t>(year / 100)));
+ } else {
+ offset = 4;
+ write_year_extended(year);
+ year = 0;
+ }
+ write_digit2_separated(buf + 2, static_cast<unsigned>(year % 100),
+ to_unsigned(tm_mon() + 1), to_unsigned(tm_mday()),
+ '-');
+ out_ = copy_str<Char>(std::begin(buf) + offset, std::end(buf), out_);
+ }
+
+ void on_utc_offset(numeric_system ns) { format_utc_offset_impl(tm_, ns); }
+ void on_tz_name() { format_tz_name_impl(tm_); }
+
+ void on_year(numeric_system ns) {
+ if (is_classic_ || ns == numeric_system::standard)
+ return write_year(tm_year());
+ format_localized('Y', 'E');
+ }
+ void on_short_year(numeric_system ns) {
+ if (is_classic_ || ns == numeric_system::standard)
+ return write2(split_year_lower(tm_year()));
+ format_localized('y', 'O');
+ }
+ void on_offset_year() {
+ if (is_classic_) return write2(split_year_lower(tm_year()));
+ format_localized('y', 'E');
+ }
+
+ void on_century(numeric_system ns) {
+ if (is_classic_ || ns == numeric_system::standard) {
+ auto year = tm_year();
+ auto upper = year / 100;
+ if (year >= -99 && year < 0) {
+ // Zero upper on negative year.
+ *out_++ = '-';
+ *out_++ = '0';
+ } else if (upper >= 0 && upper < 100) {
+ write2(static_cast<int>(upper));
+ } else {
+ out_ = write<Char>(out_, upper);
+ }
+ } else {
+ format_localized('C', 'E');
+ }
+ }
+
+ void on_dec_month(numeric_system ns) {
+ if (is_classic_ || ns == numeric_system::standard)
+ return write2(tm_mon() + 1);
+ format_localized('m', 'O');
+ }
+
+ void on_dec0_week_of_year(numeric_system ns) {
+ if (is_classic_ || ns == numeric_system::standard)
+ return write2((tm_yday() + days_per_week - tm_wday()) / days_per_week);
+ format_localized('U', 'O');
+ }
+ void on_dec1_week_of_year(numeric_system ns) {
+ if (is_classic_ || ns == numeric_system::standard) {
+ auto wday = tm_wday();
+ write2((tm_yday() + days_per_week -
+ (wday == 0 ? (days_per_week - 1) : (wday - 1))) /
+ days_per_week);
+ } else {
+ format_localized('W', 'O');
+ }
+ }
+ void on_iso_week_of_year(numeric_system ns) {
+ if (is_classic_ || ns == numeric_system::standard)
+ return write2(tm_iso_week_of_year());
+ format_localized('V', 'O');
+ }
+
+ void on_iso_week_based_year() { write_year(tm_iso_week_year()); }
+ void on_iso_week_based_short_year() {
+ write2(split_year_lower(tm_iso_week_year()));
+ }
+
+ void on_day_of_year() {
+ auto yday = tm_yday() + 1;
+ write1(yday / 100);
+ write2(yday % 100);
+ }
+ void on_day_of_month(numeric_system ns) {
+ if (is_classic_ || ns == numeric_system::standard) return write2(tm_mday());
+ format_localized('d', 'O');
+ }
+ void on_day_of_month_space(numeric_system ns) {
+ if (is_classic_ || ns == numeric_system::standard) {
+ auto mday = to_unsigned(tm_mday()) % 100;
+ const char* d2 = digits2(mday);
+ *out_++ = mday < 10 ? ' ' : d2[0];
+ *out_++ = d2[1];
+ } else {
+ format_localized('e', 'O');
+ }
+ }
+
+ void on_24_hour(numeric_system ns, pad_type pad) {
+ if (is_classic_ || ns == numeric_system::standard)
+ return write2(tm_hour(), pad);
+ format_localized('H', 'O');
+ }
+ void on_12_hour(numeric_system ns, pad_type pad) {
+ if (is_classic_ || ns == numeric_system::standard)
+ return write2(tm_hour12(), pad);
+ format_localized('I', 'O');
+ }
+ void on_minute(numeric_system ns, pad_type pad) {
+ if (is_classic_ || ns == numeric_system::standard)
+ return write2(tm_min(), pad);
+ format_localized('M', 'O');
+ }
+
+ void on_second(numeric_system ns, pad_type pad) {
+ if (is_classic_ || ns == numeric_system::standard) {
+ write2(tm_sec(), pad);
+ if (subsecs_) {
+ if (std::is_floating_point<typename Duration::rep>::value) {
+ auto buf = memory_buffer();
+ write_floating_seconds(buf, *subsecs_);
+ if (buf.size() > 1) {
+ // Remove the leading "0", write something like ".123".
+ out_ = std::copy(buf.begin() + 1, buf.end(), out_);
+ }
+ } else {
+ write_fractional_seconds<Char>(out_, *subsecs_);
+ }
+ }
+ } else {
+ // Currently no formatting of subseconds when a locale is set.
+ format_localized('S', 'O');
+ }
+ }
+
+ void on_12_hour_time() {
+ if (is_classic_) {
+ char buf[8];
+ write_digit2_separated(buf, to_unsigned(tm_hour12()),
+ to_unsigned(tm_min()), to_unsigned(tm_sec()), ':');
+ out_ = copy_str<Char>(std::begin(buf), std::end(buf), out_);
+ *out_++ = ' ';
+ on_am_pm();
+ } else {
+ format_localized('r');
+ }
+ }
+ void on_24_hour_time() {
+ write2(tm_hour());
+ *out_++ = ':';
+ write2(tm_min());
+ }
+ void on_iso_time() {
+ on_24_hour_time();
+ *out_++ = ':';
+ on_second(numeric_system::standard, pad_type::unspecified);
+ }
+
+ void on_am_pm() {
+ if (is_classic_) {
+ *out_++ = tm_hour() < 12 ? 'A' : 'P';
+ *out_++ = 'M';
+ } else {
+ format_localized('p');
+ }
+ }
+
+ // These apply to chrono durations but not tm.
+ void on_duration_value() {}
+ void on_duration_unit() {}
+};
+
+struct chrono_format_checker : null_chrono_spec_handler<chrono_format_checker> {
+ bool has_precision_integral = false;
+
+ FMT_NORETURN void unsupported() { FMT_THROW(format_error("no date")); }
+
+ template <typename Char>
+ FMT_CONSTEXPR void on_text(const Char*, const Char*) {}
+ FMT_CONSTEXPR void on_24_hour(numeric_system, pad_type) {}
+ FMT_CONSTEXPR void on_12_hour(numeric_system, pad_type) {}
+ FMT_CONSTEXPR void on_minute(numeric_system, pad_type) {}
+ FMT_CONSTEXPR void on_second(numeric_system, pad_type) {}
+ FMT_CONSTEXPR void on_12_hour_time() {}
+ FMT_CONSTEXPR void on_24_hour_time() {}
+ FMT_CONSTEXPR void on_iso_time() {}
+ FMT_CONSTEXPR void on_am_pm() {}
+ FMT_CONSTEXPR void on_duration_value() const {
+ if (has_precision_integral) {
+ FMT_THROW(format_error("precision not allowed for this argument type"));
+ }
+ }
+ FMT_CONSTEXPR void on_duration_unit() {}
+};
+
+template <typename T,
+ FMT_ENABLE_IF(std::is_integral<T>::value&& has_isfinite<T>::value)>
+inline bool isfinite(T) {
+ return true;
+}
+
+template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+inline T mod(T x, int y) {
+ return x % static_cast<T>(y);
+}
+template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
+inline T mod(T x, int y) {
+ return std::fmod(x, static_cast<T>(y));
+}
+
+// If T is an integral type, maps T to its unsigned counterpart, otherwise
+// leaves it unchanged (unlike std::make_unsigned).
+template <typename T, bool INTEGRAL = std::is_integral<T>::value>
+struct make_unsigned_or_unchanged {
+ using type = T;
+};
+
+template <typename T> struct make_unsigned_or_unchanged<T, true> {
+ using type = typename std::make_unsigned<T>::type;
+};
+
+#if FMT_SAFE_DURATION_CAST
+// throwing version of safe_duration_cast
+template <typename To, typename FromRep, typename FromPeriod>
+To fmt_safe_duration_cast(std::chrono::duration<FromRep, FromPeriod> from) {
+ int ec;
+ To to = safe_duration_cast::safe_duration_cast<To>(from, ec);
+ if (ec) FMT_THROW(format_error("cannot format duration"));
+ return to;
+}
+#endif
+
+template <typename Rep, typename Period,
+ FMT_ENABLE_IF(std::is_integral<Rep>::value)>
+inline std::chrono::duration<Rep, std::milli> get_milliseconds(
+ std::chrono::duration<Rep, Period> d) {
+ // this may overflow and/or the result may not fit in the
+ // target type.
+#if FMT_SAFE_DURATION_CAST
+ using CommonSecondsType =
+ typename std::common_type<decltype(d), std::chrono::seconds>::type;
+ const auto d_as_common = fmt_safe_duration_cast<CommonSecondsType>(d);
+ const auto d_as_whole_seconds =
+ fmt_safe_duration_cast<std::chrono::seconds>(d_as_common);
+ // this conversion should be nonproblematic
+ const auto diff = d_as_common - d_as_whole_seconds;
+ const auto ms =
+ fmt_safe_duration_cast<std::chrono::duration<Rep, std::milli>>(diff);
+ return ms;
+#else
+ auto s = std::chrono::duration_cast<std::chrono::seconds>(d);
+ return std::chrono::duration_cast<std::chrono::milliseconds>(d - s);
+#endif
+}
+
+template <typename Char, typename Rep, typename OutputIt,
+ FMT_ENABLE_IF(std::is_integral<Rep>::value)>
+OutputIt format_duration_value(OutputIt out, Rep val, int) {
+ return write<Char>(out, val);
+}
+
+template <typename Char, typename Rep, typename OutputIt,
+ FMT_ENABLE_IF(std::is_floating_point<Rep>::value)>
+OutputIt format_duration_value(OutputIt out, Rep val, int precision) {
+ auto specs = format_specs<Char>();
+ specs.precision = precision;
+ specs.type = precision >= 0 ? presentation_type::fixed_lower
+ : presentation_type::general_lower;
+ return write<Char>(out, val, specs);
+}
+
+template <typename Char, typename OutputIt>
+OutputIt copy_unit(string_view unit, OutputIt out, Char) {
+ return std::copy(unit.begin(), unit.end(), out);
+}
+
+template <typename OutputIt>
+OutputIt copy_unit(string_view unit, OutputIt out, wchar_t) {
+ // This works when wchar_t is UTF-32 because units only contain characters
+ // that have the same representation in UTF-16 and UTF-32.
+ utf8_to_utf16 u(unit);
+ return std::copy(u.c_str(), u.c_str() + u.size(), out);
+}
+
+template <typename Char, typename Period, typename OutputIt>
+OutputIt format_duration_unit(OutputIt out) {
+ if (const char* unit = get_units<Period>())
+ return copy_unit(string_view(unit), out, Char());
+ *out++ = '[';
+ out = write<Char>(out, Period::num);
+ if (const_check(Period::den != 1)) {
+ *out++ = '/';
+ out = write<Char>(out, Period::den);
+ }
+ *out++ = ']';
+ *out++ = 's';
+ return out;
+}
+
+class get_locale {
+ private:
+ union {
+ std::locale locale_;
+ };
+ bool has_locale_ = false;
+
+ public:
+ get_locale(bool localized, locale_ref loc) : has_locale_(localized) {
+ if (localized)
+ ::new (&locale_) std::locale(loc.template get<std::locale>());
+ }
+ ~get_locale() {
+ if (has_locale_) locale_.~locale();
+ }
+ operator const std::locale&() const {
+ return has_locale_ ? locale_ : get_classic_locale();
+ }
+};
+
+template <typename FormatContext, typename OutputIt, typename Rep,
+ typename Period>
+struct chrono_formatter {
+ FormatContext& context;
+ OutputIt out;
+ int precision;
+ bool localized = false;
+ // rep is unsigned to avoid overflow.
+ using rep =
+ conditional_t<std::is_integral<Rep>::value && sizeof(Rep) < sizeof(int),
+ unsigned, typename make_unsigned_or_unchanged<Rep>::type>;
+ rep val;
+ using seconds = std::chrono::duration<rep>;
+ seconds s;
+ using milliseconds = std::chrono::duration<rep, std::milli>;
+ bool negative;
+
+ using char_type = typename FormatContext::char_type;
+ using tm_writer_type = tm_writer<OutputIt, char_type>;
+
+ chrono_formatter(FormatContext& ctx, OutputIt o,
+ std::chrono::duration<Rep, Period> d)
+ : context(ctx),
+ out(o),
+ val(static_cast<rep>(d.count())),
+ negative(false) {
+ if (d.count() < 0) {
+ val = 0 - val;
+ negative = true;
+ }
+
+ // this may overflow and/or the result may not fit in the
+ // target type.
+#if FMT_SAFE_DURATION_CAST
+ // might need checked conversion (rep!=Rep)
+ auto tmpval = std::chrono::duration<rep, Period>(val);
+ s = fmt_safe_duration_cast<seconds>(tmpval);
+#else
+ s = std::chrono::duration_cast<seconds>(
+ std::chrono::duration<rep, Period>(val));
+#endif
+ }
+
+ // returns true if nan or inf, writes to out.
+ bool handle_nan_inf() {
+ if (isfinite(val)) {
+ return false;
+ }
+ if (isnan(val)) {
+ write_nan();
+ return true;
+ }
+ // must be +-inf
+ if (val > 0) {
+ write_pinf();
+ } else {
+ write_ninf();
+ }
+ return true;
+ }
+
+ Rep hour() const { return static_cast<Rep>(mod((s.count() / 3600), 24)); }
+
+ Rep hour12() const {
+ Rep hour = static_cast<Rep>(mod((s.count() / 3600), 12));
+ return hour <= 0 ? 12 : hour;
+ }
+
+ Rep minute() const { return static_cast<Rep>(mod((s.count() / 60), 60)); }
+ Rep second() const { return static_cast<Rep>(mod(s.count(), 60)); }
+
+ std::tm time() const {
+ auto time = std::tm();
+ time.tm_hour = to_nonnegative_int(hour(), 24);
+ time.tm_min = to_nonnegative_int(minute(), 60);
+ time.tm_sec = to_nonnegative_int(second(), 60);
+ return time;
+ }
+
+ void write_sign() {
+ if (negative) {
+ *out++ = '-';
+ negative = false;
+ }
+ }
+
+ void write(Rep value, int width, pad_type pad = pad_type::unspecified) {
+ write_sign();
+ if (isnan(value)) return write_nan();
+ uint32_or_64_or_128_t<int> n =
+ to_unsigned(to_nonnegative_int(value, max_value<int>()));
+ int num_digits = detail::count_digits(n);
+ if (width > num_digits) {
+ out = detail::write_padding(out, pad, width - num_digits);
+ }
+ out = format_decimal<char_type>(out, n, num_digits).end;
+ }
+
+ void write_nan() { std::copy_n("nan", 3, out); }
+ void write_pinf() { std::copy_n("inf", 3, out); }
+ void write_ninf() { std::copy_n("-inf", 4, out); }
+
+ template <typename Callback, typename... Args>
+ void format_tm(const tm& time, Callback cb, Args... args) {
+ if (isnan(val)) return write_nan();
+ get_locale loc(localized, context.locale());
+ auto w = tm_writer_type(loc, out, time);
+ (w.*cb)(args...);
+ out = w.out();
+ }
+
+ void on_text(const char_type* begin, const char_type* end) {
+ std::copy(begin, end, out);
+ }
+
+ // These are not implemented because durations don't have date information.
+ void on_abbr_weekday() {}
+ void on_full_weekday() {}
+ void on_dec0_weekday(numeric_system) {}
+ void on_dec1_weekday(numeric_system) {}
+ void on_abbr_month() {}
+ void on_full_month() {}
+ void on_datetime(numeric_system) {}
+ void on_loc_date(numeric_system) {}
+ void on_loc_time(numeric_system) {}
+ void on_us_date() {}
+ void on_iso_date() {}
+ void on_utc_offset(numeric_system) {}
+ void on_tz_name() {}
+ void on_year(numeric_system) {}
+ void on_short_year(numeric_system) {}
+ void on_offset_year() {}
+ void on_century(numeric_system) {}
+ void on_iso_week_based_year() {}
+ void on_iso_week_based_short_year() {}
+ void on_dec_month(numeric_system) {}
+ void on_dec0_week_of_year(numeric_system) {}
+ void on_dec1_week_of_year(numeric_system) {}
+ void on_iso_week_of_year(numeric_system) {}
+ void on_day_of_year() {}
+ void on_day_of_month(numeric_system) {}
+ void on_day_of_month_space(numeric_system) {}
+
+ void on_24_hour(numeric_system ns, pad_type pad) {
+ if (handle_nan_inf()) return;
+
+ if (ns == numeric_system::standard) return write(hour(), 2, pad);
+ auto time = tm();
+ time.tm_hour = to_nonnegative_int(hour(), 24);
+ format_tm(time, &tm_writer_type::on_24_hour, ns, pad);
+ }
+
+ void on_12_hour(numeric_system ns, pad_type pad) {
+ if (handle_nan_inf()) return;
+
+ if (ns == numeric_system::standard) return write(hour12(), 2, pad);
+ auto time = tm();
+ time.tm_hour = to_nonnegative_int(hour12(), 12);
+ format_tm(time, &tm_writer_type::on_12_hour, ns, pad);
+ }
+
+ void on_minute(numeric_system ns, pad_type pad) {
+ if (handle_nan_inf()) return;
+
+ if (ns == numeric_system::standard) return write(minute(), 2, pad);
+ auto time = tm();
+ time.tm_min = to_nonnegative_int(minute(), 60);
+ format_tm(time, &tm_writer_type::on_minute, ns, pad);
+ }
+
+ void on_second(numeric_system ns, pad_type pad) {
+ if (handle_nan_inf()) return;
+
+ if (ns == numeric_system::standard) {
+ if (std::is_floating_point<rep>::value) {
+ auto buf = memory_buffer();
+ write_floating_seconds(buf, std::chrono::duration<rep, Period>(val),
+ precision);
+ if (negative) *out++ = '-';
+ if (buf.size() < 2 || buf[1] == '.') {
+ out = detail::write_padding(out, pad);
+ }
+ out = std::copy(buf.begin(), buf.end(), out);
+ } else {
+ write(second(), 2, pad);
+ write_fractional_seconds<char_type>(
+ out, std::chrono::duration<rep, Period>(val), precision);
+ }
+ return;
+ }
+ auto time = tm();
+ time.tm_sec = to_nonnegative_int(second(), 60);
+ format_tm(time, &tm_writer_type::on_second, ns, pad);
+ }
+
+ void on_12_hour_time() {
+ if (handle_nan_inf()) return;
+ format_tm(time(), &tm_writer_type::on_12_hour_time);
+ }
+
+ void on_24_hour_time() {
+ if (handle_nan_inf()) {
+ *out++ = ':';
+ handle_nan_inf();
+ return;
+ }
+
+ write(hour(), 2);
+ *out++ = ':';
+ write(minute(), 2);
+ }
+
+ void on_iso_time() {
+ on_24_hour_time();
+ *out++ = ':';
+ if (handle_nan_inf()) return;
+ on_second(numeric_system::standard, pad_type::unspecified);
+ }
+
+ void on_am_pm() {
+ if (handle_nan_inf()) return;
+ format_tm(time(), &tm_writer_type::on_am_pm);
+ }
+
+ void on_duration_value() {
+ if (handle_nan_inf()) return;
+ write_sign();
+ out = format_duration_value<char_type>(out, val, precision);
+ }
+
+ void on_duration_unit() {
+ out = format_duration_unit<char_type, Period>(out);
+ }
+};
+
+FMT_END_DETAIL_NAMESPACE
+
+#if defined(__cpp_lib_chrono) && __cpp_lib_chrono >= 201907
+using weekday = std::chrono::weekday;
+#else
+// A fallback version of weekday.
+class weekday {
+ private:
+ unsigned char value;
+
+ public:
+ weekday() = default;
+ explicit constexpr weekday(unsigned wd) noexcept
+ : value(static_cast<unsigned char>(wd != 7 ? wd : 0)) {}
+ constexpr unsigned c_encoding() const noexcept { return value; }
+};
+
+class year_month_day {};
+#endif
+
+// A rudimentary weekday formatter.
+template <typename Char> struct formatter<weekday, Char> {
+ private:
+ bool localized = false;
+
+ public:
+ FMT_CONSTEXPR auto parse(basic_format_parse_context<Char>& ctx)
+ -> decltype(ctx.begin()) {
+ auto begin = ctx.begin(), end = ctx.end();
+ if (begin != end && *begin == 'L') {
+ ++begin;
+ localized = true;
+ }
+ return begin;
+ }
+
+ template <typename FormatContext>
+ auto format(weekday wd, FormatContext& ctx) const -> decltype(ctx.out()) {
+ auto time = std::tm();
+ time.tm_wday = static_cast<int>(wd.c_encoding());
+ detail::get_locale loc(localized, ctx.locale());
+ auto w = detail::tm_writer<decltype(ctx.out()), Char>(loc, ctx.out(), time);
+ w.on_abbr_weekday();
+ return w.out();
+ }
+};
+
+template <typename Rep, typename Period, typename Char>
+struct formatter<std::chrono::duration<Rep, Period>, Char> {
+ private:
+ format_specs<Char> specs;
+ int precision = -1;
+ using arg_ref_type = detail::arg_ref<Char>;
+ arg_ref_type width_ref;
+ arg_ref_type precision_ref;
+ bool localized = false;
+ basic_string_view<Char> format_str;
+ using duration = std::chrono::duration<Rep, Period>;
+
+ using iterator = typename basic_format_parse_context<Char>::iterator;
+ struct parse_range {
+ iterator begin;
+ iterator end;
+ };
+
+ FMT_CONSTEXPR parse_range do_parse(basic_format_parse_context<Char>& ctx) {
+ auto begin = ctx.begin(), end = ctx.end();
+ if (begin == end || *begin == '}') return {begin, begin};
+
+ begin = detail::parse_align(begin, end, specs);
+ if (begin == end) return {begin, begin};
+
+ begin = detail::parse_dynamic_spec(begin, end, specs.width, width_ref, ctx);
+ if (begin == end) return {begin, begin};
+
+ auto checker = detail::chrono_format_checker();
+ if (*begin == '.') {
+ checker.has_precision_integral = !std::is_floating_point<Rep>::value;
+ begin =
+ detail::parse_precision(begin, end, precision, precision_ref, ctx);
+ }
+ if (begin != end && *begin == 'L') {
+ ++begin;
+ localized = true;
+ }
+ end = detail::parse_chrono_format(begin, end, checker);
+ return {begin, end};
+ }
+
+ public:
+ FMT_CONSTEXPR auto parse(basic_format_parse_context<Char>& ctx)
+ -> decltype(ctx.begin()) {
+ auto range = do_parse(ctx);
+ format_str = basic_string_view<Char>(
+ &*range.begin, detail::to_unsigned(range.end - range.begin));
+ return range.end;
+ }
+
+ template <typename FormatContext>
+ auto format(const duration& d, FormatContext& ctx) const
+ -> decltype(ctx.out()) {
+ auto specs_copy = specs;
+ auto precision_copy = precision;
+ auto begin = format_str.begin(), end = format_str.end();
+ // As a possible future optimization, we could avoid extra copying if width
+ // is not specified.
+ basic_memory_buffer<Char> buf;
+ auto out = std::back_inserter(buf);
+ detail::handle_dynamic_spec<detail::width_checker>(specs_copy.width,
+ width_ref, ctx);
+ detail::handle_dynamic_spec<detail::precision_checker>(precision_copy,
+ precision_ref, ctx);
+ if (begin == end || *begin == '}') {
+ out = detail::format_duration_value<Char>(out, d.count(), precision_copy);
+ detail::format_duration_unit<Char, Period>(out);
+ } else {
+ detail::chrono_formatter<FormatContext, decltype(out), Rep, Period> f(
+ ctx, out, d);
+ f.precision = precision_copy;
+ f.localized = localized;
+ detail::parse_chrono_format(begin, end, f);
+ }
+ return detail::write(
+ ctx.out(), basic_string_view<Char>(buf.data(), buf.size()), specs_copy);
+ }
+};
+
+template <typename Char, typename Duration>
+struct formatter<std::chrono::time_point<std::chrono::system_clock, Duration>,
+ Char> : formatter<std::tm, Char> {
+ FMT_CONSTEXPR formatter() {
+ this->format_str = detail::string_literal<Char, '%', 'F', ' ', '%', 'T'>{};
+ }
+
+ template <typename FormatContext>
+ auto format(std::chrono::time_point<std::chrono::system_clock, Duration> val,
+ FormatContext& ctx) const -> decltype(ctx.out()) {
+ using period = typename Duration::period;
+ if (period::num != 1 || period::den != 1 ||
+ std::is_floating_point<typename Duration::rep>::value) {
+ const auto epoch = val.time_since_epoch();
+ auto subsecs = std::chrono::duration_cast<Duration>(
+ epoch - std::chrono::duration_cast<std::chrono::seconds>(epoch));
+
+ if (subsecs.count() < 0) {
+ auto second = std::chrono::seconds(1);
+ if (epoch.count() < ((Duration::min)() + second).count())
+ FMT_THROW(format_error("duration is too small"));
+ subsecs += second;
+ val -= second;
+ }
+
+ return formatter<std::tm, Char>::do_format(
+ gmtime(std::chrono::time_point_cast<std::chrono::seconds>(val)), ctx,
+ &subsecs);
+ }
+
+ return formatter<std::tm, Char>::format(
+ gmtime(std::chrono::time_point_cast<std::chrono::seconds>(val)), ctx);
+ }
+};
+
+#if FMT_USE_LOCAL_TIME
+template <typename Char, typename Duration>
+struct formatter<std::chrono::local_time<Duration>, Char>
+ : formatter<std::tm, Char> {
+ FMT_CONSTEXPR formatter() {
+ this->format_str = detail::string_literal<Char, '%', 'F', ' ', '%', 'T'>{};
+ }
+
+ template <typename FormatContext>
+ auto format(std::chrono::local_time<Duration> val, FormatContext& ctx) const
+ -> decltype(ctx.out()) {
+ using period = typename Duration::period;
+ if (period::num != 1 || period::den != 1 ||
+ std::is_floating_point<typename Duration::rep>::value) {
+ const auto epoch = val.time_since_epoch();
+ const auto subsecs = std::chrono::duration_cast<Duration>(
+ epoch - std::chrono::duration_cast<std::chrono::seconds>(epoch));
+
+ return formatter<std::tm, Char>::do_format(
+ localtime(std::chrono::time_point_cast<std::chrono::seconds>(val)),
+ ctx, &subsecs);
+ }
+
+ return formatter<std::tm, Char>::format(
+ localtime(std::chrono::time_point_cast<std::chrono::seconds>(val)),
+ ctx);
+ }
+};
+#endif
+
+#if FMT_USE_UTC_TIME
+template <typename Char, typename Duration>
+struct formatter<std::chrono::time_point<std::chrono::utc_clock, Duration>,
+ Char>
+ : formatter<std::chrono::time_point<std::chrono::system_clock, Duration>,
+ Char> {
+ template <typename FormatContext>
+ auto format(std::chrono::time_point<std::chrono::utc_clock, Duration> val,
+ FormatContext& ctx) const -> decltype(ctx.out()) {
+ return formatter<
+ std::chrono::time_point<std::chrono::system_clock, Duration>,
+ Char>::format(std::chrono::utc_clock::to_sys(val), ctx);
+ }
+};
+#endif
+
+template <typename Char> struct formatter<std::tm, Char> {
+ private:
+ format_specs<Char> specs;
+ detail::arg_ref<Char> width_ref;
+
+ protected:
+ basic_string_view<Char> format_str;
+
+ FMT_CONSTEXPR auto do_parse(basic_format_parse_context<Char>& ctx)
+ -> decltype(ctx.begin()) {
+ auto begin = ctx.begin(), end = ctx.end();
+ if (begin == end || *begin == '}') return begin;
+
+ begin = detail::parse_align(begin, end, specs);
+ if (begin == end) return end;
+
+ begin = detail::parse_dynamic_spec(begin, end, specs.width, width_ref, ctx);
+ if (begin == end) return end;
+
+ end = detail::parse_chrono_format(begin, end, detail::tm_format_checker());
+ // Replace default format_str only if the new spec is not empty.
+ if (end != begin) format_str = {begin, detail::to_unsigned(end - begin)};
+ return end;
+ }
+
+ template <typename FormatContext, typename Duration>
+ auto do_format(const std::tm& tm, FormatContext& ctx,
+ const Duration* subsecs) const -> decltype(ctx.out()) {
+ auto specs_copy = specs;
+ basic_memory_buffer<Char> buf;
+ auto out = std::back_inserter(buf);
+ detail::handle_dynamic_spec<detail::width_checker>(specs_copy.width,
+ width_ref, ctx);
+
+ const auto loc_ref = ctx.locale();
+ detail::get_locale loc(static_cast<bool>(loc_ref), loc_ref);
+ auto w =
+ detail::tm_writer<decltype(out), Char, Duration>(loc, out, tm, subsecs);
+ detail::parse_chrono_format(format_str.begin(), format_str.end(), w);
+ return detail::write(
+ ctx.out(), basic_string_view<Char>(buf.data(), buf.size()), specs_copy);
+ }
+
+ public:
+ FMT_CONSTEXPR auto parse(basic_format_parse_context<Char>& ctx)
+ -> decltype(ctx.begin()) {
+ return this->do_parse(ctx);
+ }
+
+ template <typename FormatContext>
+ auto format(const std::tm& tm, FormatContext& ctx) const
+ -> decltype(ctx.out()) {
+ return do_format<FormatContext, std::chrono::seconds>(tm, ctx, nullptr);
+ }
+};
+
+FMT_END_EXPORT
+FMT_END_NAMESPACE
+
+#endif // FMT_CHRONO_H_
diff --git a/contrib/fmt/include/fmt/color.h b/contrib/fmt/include/fmt/color.h
new file mode 100644
index 0000000..d175448
--- /dev/null
+++ b/contrib/fmt/include/fmt/color.h
@@ -0,0 +1,633 @@
+// Formatting library for C++ - color support
+//
+// Copyright (c) 2018 - present, Victor Zverovich and fmt contributors
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_COLOR_H_
+#define FMT_COLOR_H_
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+FMT_BEGIN_EXPORT
+
+enum class color : uint32_t {
+ alice_blue = 0xF0F8FF, // rgb(240,248,255)
+ antique_white = 0xFAEBD7, // rgb(250,235,215)
+ aqua = 0x00FFFF, // rgb(0,255,255)
+ aquamarine = 0x7FFFD4, // rgb(127,255,212)
+ azure = 0xF0FFFF, // rgb(240,255,255)
+ beige = 0xF5F5DC, // rgb(245,245,220)
+ bisque = 0xFFE4C4, // rgb(255,228,196)
+ black = 0x000000, // rgb(0,0,0)
+ blanched_almond = 0xFFEBCD, // rgb(255,235,205)
+ blue = 0x0000FF, // rgb(0,0,255)
+ blue_violet = 0x8A2BE2, // rgb(138,43,226)
+ brown = 0xA52A2A, // rgb(165,42,42)
+ burly_wood = 0xDEB887, // rgb(222,184,135)
+ cadet_blue = 0x5F9EA0, // rgb(95,158,160)
+ chartreuse = 0x7FFF00, // rgb(127,255,0)
+ chocolate = 0xD2691E, // rgb(210,105,30)
+ coral = 0xFF7F50, // rgb(255,127,80)
+ cornflower_blue = 0x6495ED, // rgb(100,149,237)
+ cornsilk = 0xFFF8DC, // rgb(255,248,220)
+ crimson = 0xDC143C, // rgb(220,20,60)
+ cyan = 0x00FFFF, // rgb(0,255,255)
+ dark_blue = 0x00008B, // rgb(0,0,139)
+ dark_cyan = 0x008B8B, // rgb(0,139,139)
+ dark_golden_rod = 0xB8860B, // rgb(184,134,11)
+ dark_gray = 0xA9A9A9, // rgb(169,169,169)
+ dark_green = 0x006400, // rgb(0,100,0)
+ dark_khaki = 0xBDB76B, // rgb(189,183,107)
+ dark_magenta = 0x8B008B, // rgb(139,0,139)
+ dark_olive_green = 0x556B2F, // rgb(85,107,47)
+ dark_orange = 0xFF8C00, // rgb(255,140,0)
+ dark_orchid = 0x9932CC, // rgb(153,50,204)
+ dark_red = 0x8B0000, // rgb(139,0,0)
+ dark_salmon = 0xE9967A, // rgb(233,150,122)
+ dark_sea_green = 0x8FBC8F, // rgb(143,188,143)
+ dark_slate_blue = 0x483D8B, // rgb(72,61,139)
+ dark_slate_gray = 0x2F4F4F, // rgb(47,79,79)
+ dark_turquoise = 0x00CED1, // rgb(0,206,209)
+ dark_violet = 0x9400D3, // rgb(148,0,211)
+ deep_pink = 0xFF1493, // rgb(255,20,147)
+ deep_sky_blue = 0x00BFFF, // rgb(0,191,255)
+ dim_gray = 0x696969, // rgb(105,105,105)
+ dodger_blue = 0x1E90FF, // rgb(30,144,255)
+ fire_brick = 0xB22222, // rgb(178,34,34)
+ floral_white = 0xFFFAF0, // rgb(255,250,240)
+ forest_green = 0x228B22, // rgb(34,139,34)
+ fuchsia = 0xFF00FF, // rgb(255,0,255)
+ gainsboro = 0xDCDCDC, // rgb(220,220,220)
+ ghost_white = 0xF8F8FF, // rgb(248,248,255)
+ gold = 0xFFD700, // rgb(255,215,0)
+ golden_rod = 0xDAA520, // rgb(218,165,32)
+ gray = 0x808080, // rgb(128,128,128)
+ green = 0x008000, // rgb(0,128,0)
+ green_yellow = 0xADFF2F, // rgb(173,255,47)
+ honey_dew = 0xF0FFF0, // rgb(240,255,240)
+ hot_pink = 0xFF69B4, // rgb(255,105,180)
+ indian_red = 0xCD5C5C, // rgb(205,92,92)
+ indigo = 0x4B0082, // rgb(75,0,130)
+ ivory = 0xFFFFF0, // rgb(255,255,240)
+ khaki = 0xF0E68C, // rgb(240,230,140)
+ lavender = 0xE6E6FA, // rgb(230,230,250)
+ lavender_blush = 0xFFF0F5, // rgb(255,240,245)
+ lawn_green = 0x7CFC00, // rgb(124,252,0)
+ lemon_chiffon = 0xFFFACD, // rgb(255,250,205)
+ light_blue = 0xADD8E6, // rgb(173,216,230)
+ light_coral = 0xF08080, // rgb(240,128,128)
+ light_cyan = 0xE0FFFF, // rgb(224,255,255)
+ light_golden_rod_yellow = 0xFAFAD2, // rgb(250,250,210)
+ light_gray = 0xD3D3D3, // rgb(211,211,211)
+ light_green = 0x90EE90, // rgb(144,238,144)
+ light_pink = 0xFFB6C1, // rgb(255,182,193)
+ light_salmon = 0xFFA07A, // rgb(255,160,122)
+ light_sea_green = 0x20B2AA, // rgb(32,178,170)
+ light_sky_blue = 0x87CEFA, // rgb(135,206,250)
+ light_slate_gray = 0x778899, // rgb(119,136,153)
+ light_steel_blue = 0xB0C4DE, // rgb(176,196,222)
+ light_yellow = 0xFFFFE0, // rgb(255,255,224)
+ lime = 0x00FF00, // rgb(0,255,0)
+ lime_green = 0x32CD32, // rgb(50,205,50)
+ linen = 0xFAF0E6, // rgb(250,240,230)
+ magenta = 0xFF00FF, // rgb(255,0,255)
+ maroon = 0x800000, // rgb(128,0,0)
+ medium_aquamarine = 0x66CDAA, // rgb(102,205,170)
+ medium_blue = 0x0000CD, // rgb(0,0,205)
+ medium_orchid = 0xBA55D3, // rgb(186,85,211)
+ medium_purple = 0x9370DB, // rgb(147,112,219)
+ medium_sea_green = 0x3CB371, // rgb(60,179,113)
+ medium_slate_blue = 0x7B68EE, // rgb(123,104,238)
+ medium_spring_green = 0x00FA9A, // rgb(0,250,154)
+ medium_turquoise = 0x48D1CC, // rgb(72,209,204)
+ medium_violet_red = 0xC71585, // rgb(199,21,133)
+ midnight_blue = 0x191970, // rgb(25,25,112)
+ mint_cream = 0xF5FFFA, // rgb(245,255,250)
+ misty_rose = 0xFFE4E1, // rgb(255,228,225)
+ moccasin = 0xFFE4B5, // rgb(255,228,181)
+ navajo_white = 0xFFDEAD, // rgb(255,222,173)
+ navy = 0x000080, // rgb(0,0,128)
+ old_lace = 0xFDF5E6, // rgb(253,245,230)
+ olive = 0x808000, // rgb(128,128,0)
+ olive_drab = 0x6B8E23, // rgb(107,142,35)
+ orange = 0xFFA500, // rgb(255,165,0)
+ orange_red = 0xFF4500, // rgb(255,69,0)
+ orchid = 0xDA70D6, // rgb(218,112,214)
+ pale_golden_rod = 0xEEE8AA, // rgb(238,232,170)
+ pale_green = 0x98FB98, // rgb(152,251,152)
+ pale_turquoise = 0xAFEEEE, // rgb(175,238,238)
+ pale_violet_red = 0xDB7093, // rgb(219,112,147)
+ papaya_whip = 0xFFEFD5, // rgb(255,239,213)
+ peach_puff = 0xFFDAB9, // rgb(255,218,185)
+ peru = 0xCD853F, // rgb(205,133,63)
+ pink = 0xFFC0CB, // rgb(255,192,203)
+ plum = 0xDDA0DD, // rgb(221,160,221)
+ powder_blue = 0xB0E0E6, // rgb(176,224,230)
+ purple = 0x800080, // rgb(128,0,128)
+ rebecca_purple = 0x663399, // rgb(102,51,153)
+ red = 0xFF0000, // rgb(255,0,0)
+ rosy_brown = 0xBC8F8F, // rgb(188,143,143)
+ royal_blue = 0x4169E1, // rgb(65,105,225)
+ saddle_brown = 0x8B4513, // rgb(139,69,19)
+ salmon = 0xFA8072, // rgb(250,128,114)
+ sandy_brown = 0xF4A460, // rgb(244,164,96)
+ sea_green = 0x2E8B57, // rgb(46,139,87)
+ sea_shell = 0xFFF5EE, // rgb(255,245,238)
+ sienna = 0xA0522D, // rgb(160,82,45)
+ silver = 0xC0C0C0, // rgb(192,192,192)
+ sky_blue = 0x87CEEB, // rgb(135,206,235)
+ slate_blue = 0x6A5ACD, // rgb(106,90,205)
+ slate_gray = 0x708090, // rgb(112,128,144)
+ snow = 0xFFFAFA, // rgb(255,250,250)
+ spring_green = 0x00FF7F, // rgb(0,255,127)
+ steel_blue = 0x4682B4, // rgb(70,130,180)
+ tan = 0xD2B48C, // rgb(210,180,140)
+ teal = 0x008080, // rgb(0,128,128)
+ thistle = 0xD8BFD8, // rgb(216,191,216)
+ tomato = 0xFF6347, // rgb(255,99,71)
+ turquoise = 0x40E0D0, // rgb(64,224,208)
+ violet = 0xEE82EE, // rgb(238,130,238)
+ wheat = 0xF5DEB3, // rgb(245,222,179)
+ white = 0xFFFFFF, // rgb(255,255,255)
+ white_smoke = 0xF5F5F5, // rgb(245,245,245)
+ yellow = 0xFFFF00, // rgb(255,255,0)
+ yellow_green = 0x9ACD32 // rgb(154,205,50)
+}; // enum class color
+
+enum class terminal_color : uint8_t {
+ black = 30,
+ red,
+ green,
+ yellow,
+ blue,
+ magenta,
+ cyan,
+ white,
+ bright_black = 90,
+ bright_red,
+ bright_green,
+ bright_yellow,
+ bright_blue,
+ bright_magenta,
+ bright_cyan,
+ bright_white
+};
+
+enum class emphasis : uint8_t {
+ bold = 1,
+ faint = 1 << 1,
+ italic = 1 << 2,
+ underline = 1 << 3,
+ blink = 1 << 4,
+ reverse = 1 << 5,
+ conceal = 1 << 6,
+ strikethrough = 1 << 7,
+};
+
+// rgb is a struct for red, green and blue colors.
+// Using the name "rgb" makes some editors show the color in a tooltip.
+struct rgb {
+ FMT_CONSTEXPR rgb() : r(0), g(0), b(0) {}
+ FMT_CONSTEXPR rgb(uint8_t r_, uint8_t g_, uint8_t b_) : r(r_), g(g_), b(b_) {}
+ FMT_CONSTEXPR rgb(uint32_t hex)
+ : r((hex >> 16) & 0xFF), g((hex >> 8) & 0xFF), b(hex & 0xFF) {}
+ FMT_CONSTEXPR rgb(color hex)
+ : r((uint32_t(hex) >> 16) & 0xFF),
+ g((uint32_t(hex) >> 8) & 0xFF),
+ b(uint32_t(hex) & 0xFF) {}
+ uint8_t r;
+ uint8_t g;
+ uint8_t b;
+};
+
+FMT_BEGIN_DETAIL_NAMESPACE
+
+// color is a struct of either a rgb color or a terminal color.
+struct color_type {
+ FMT_CONSTEXPR color_type() noexcept : is_rgb(), value{} {}
+ FMT_CONSTEXPR color_type(color rgb_color) noexcept : is_rgb(true), value{} {
+ value.rgb_color = static_cast<uint32_t>(rgb_color);
+ }
+ FMT_CONSTEXPR color_type(rgb rgb_color) noexcept : is_rgb(true), value{} {
+ value.rgb_color = (static_cast<uint32_t>(rgb_color.r) << 16) |
+ (static_cast<uint32_t>(rgb_color.g) << 8) | rgb_color.b;
+ }
+ FMT_CONSTEXPR color_type(terminal_color term_color) noexcept
+ : is_rgb(), value{} {
+ value.term_color = static_cast<uint8_t>(term_color);
+ }
+ bool is_rgb;
+ union color_union {
+ uint8_t term_color;
+ uint32_t rgb_color;
+ } value;
+};
+
+FMT_END_DETAIL_NAMESPACE
+
+/** A text style consisting of foreground and background colors and emphasis. */
+class text_style {
+ public:
+ FMT_CONSTEXPR text_style(emphasis em = emphasis()) noexcept
+ : set_foreground_color(), set_background_color(), ems(em) {}
+
+ FMT_CONSTEXPR text_style& operator|=(const text_style& rhs) {
+ if (!set_foreground_color) {
+ set_foreground_color = rhs.set_foreground_color;
+ foreground_color = rhs.foreground_color;
+ } else if (rhs.set_foreground_color) {
+ if (!foreground_color.is_rgb || !rhs.foreground_color.is_rgb)
+ FMT_THROW(format_error("can't OR a terminal color"));
+ foreground_color.value.rgb_color |= rhs.foreground_color.value.rgb_color;
+ }
+
+ if (!set_background_color) {
+ set_background_color = rhs.set_background_color;
+ background_color = rhs.background_color;
+ } else if (rhs.set_background_color) {
+ if (!background_color.is_rgb || !rhs.background_color.is_rgb)
+ FMT_THROW(format_error("can't OR a terminal color"));
+ background_color.value.rgb_color |= rhs.background_color.value.rgb_color;
+ }
+
+ ems = static_cast<emphasis>(static_cast<uint8_t>(ems) |
+ static_cast<uint8_t>(rhs.ems));
+ return *this;
+ }
+
+ friend FMT_CONSTEXPR text_style operator|(text_style lhs,
+ const text_style& rhs) {
+ return lhs |= rhs;
+ }
+
+ FMT_CONSTEXPR bool has_foreground() const noexcept {
+ return set_foreground_color;
+ }
+ FMT_CONSTEXPR bool has_background() const noexcept {
+ return set_background_color;
+ }
+ FMT_CONSTEXPR bool has_emphasis() const noexcept {
+ return static_cast<uint8_t>(ems) != 0;
+ }
+ FMT_CONSTEXPR detail::color_type get_foreground() const noexcept {
+ FMT_ASSERT(has_foreground(), "no foreground specified for this style");
+ return foreground_color;
+ }
+ FMT_CONSTEXPR detail::color_type get_background() const noexcept {
+ FMT_ASSERT(has_background(), "no background specified for this style");
+ return background_color;
+ }
+ FMT_CONSTEXPR emphasis get_emphasis() const noexcept {
+ FMT_ASSERT(has_emphasis(), "no emphasis specified for this style");
+ return ems;
+ }
+
+ private:
+ FMT_CONSTEXPR text_style(bool is_foreground,
+ detail::color_type text_color) noexcept
+ : set_foreground_color(), set_background_color(), ems() {
+ if (is_foreground) {
+ foreground_color = text_color;
+ set_foreground_color = true;
+ } else {
+ background_color = text_color;
+ set_background_color = true;
+ }
+ }
+
+ friend FMT_CONSTEXPR text_style fg(detail::color_type foreground) noexcept;
+
+ friend FMT_CONSTEXPR text_style bg(detail::color_type background) noexcept;
+
+ detail::color_type foreground_color;
+ detail::color_type background_color;
+ bool set_foreground_color;
+ bool set_background_color;
+ emphasis ems;
+};
+
+/** Creates a text style from the foreground (text) color. */
+FMT_CONSTEXPR inline text_style fg(detail::color_type foreground) noexcept {
+ return text_style(true, foreground);
+}
+
+/** Creates a text style from the background color. */
+FMT_CONSTEXPR inline text_style bg(detail::color_type background) noexcept {
+ return text_style(false, background);
+}
+
+FMT_CONSTEXPR inline text_style operator|(emphasis lhs, emphasis rhs) noexcept {
+ return text_style(lhs) | rhs;
+}
+
+FMT_BEGIN_DETAIL_NAMESPACE
+
+template <typename Char> struct ansi_color_escape {
+ FMT_CONSTEXPR ansi_color_escape(detail::color_type text_color,
+ const char* esc) noexcept {
+ // If we have a terminal color, we need to output another escape code
+ // sequence.
+ if (!text_color.is_rgb) {
+ bool is_background = esc == string_view("\x1b[48;2;");
+ uint32_t value = text_color.value.term_color;
+ // Background ASCII codes are the same as the foreground ones but with
+ // 10 more.
+ if (is_background) value += 10u;
+
+ size_t index = 0;
+ buffer[index++] = static_cast<Char>('\x1b');
+ buffer[index++] = static_cast<Char>('[');
+
+ if (value >= 100u) {
+ buffer[index++] = static_cast<Char>('1');
+ value %= 100u;
+ }
+ buffer[index++] = static_cast<Char>('0' + value / 10u);
+ buffer[index++] = static_cast<Char>('0' + value % 10u);
+
+ buffer[index++] = static_cast<Char>('m');
+ buffer[index++] = static_cast<Char>('\0');
+ return;
+ }
+
+ for (int i = 0; i < 7; i++) {
+ buffer[i] = static_cast<Char>(esc[i]);
+ }
+ rgb color(text_color.value.rgb_color);
+ to_esc(color.r, buffer + 7, ';');
+ to_esc(color.g, buffer + 11, ';');
+ to_esc(color.b, buffer + 15, 'm');
+ buffer[19] = static_cast<Char>(0);
+ }
+ FMT_CONSTEXPR ansi_color_escape(emphasis em) noexcept {
+ uint8_t em_codes[num_emphases] = {};
+ if (has_emphasis(em, emphasis::bold)) em_codes[0] = 1;
+ if (has_emphasis(em, emphasis::faint)) em_codes[1] = 2;
+ if (has_emphasis(em, emphasis::italic)) em_codes[2] = 3;
+ if (has_emphasis(em, emphasis::underline)) em_codes[3] = 4;
+ if (has_emphasis(em, emphasis::blink)) em_codes[4] = 5;
+ if (has_emphasis(em, emphasis::reverse)) em_codes[5] = 7;
+ if (has_emphasis(em, emphasis::conceal)) em_codes[6] = 8;
+ if (has_emphasis(em, emphasis::strikethrough)) em_codes[7] = 9;
+
+ size_t index = 0;
+ for (size_t i = 0; i < num_emphases; ++i) {
+ if (!em_codes[i]) continue;
+ buffer[index++] = static_cast<Char>('\x1b');
+ buffer[index++] = static_cast<Char>('[');
+ buffer[index++] = static_cast<Char>('0' + em_codes[i]);
+ buffer[index++] = static_cast<Char>('m');
+ }
+ buffer[index++] = static_cast<Char>(0);
+ }
+ FMT_CONSTEXPR operator const Char*() const noexcept { return buffer; }
+
+ FMT_CONSTEXPR const Char* begin() const noexcept { return buffer; }
+ FMT_CONSTEXPR_CHAR_TRAITS const Char* end() const noexcept {
+ return buffer + std::char_traits<Char>::length(buffer);
+ }
+
+ private:
+ static constexpr size_t num_emphases = 8;
+ Char buffer[7u + 3u * num_emphases + 1u];
+
+ static FMT_CONSTEXPR void to_esc(uint8_t c, Char* out,
+ char delimiter) noexcept {
+ out[0] = static_cast<Char>('0' + c / 100);
+ out[1] = static_cast<Char>('0' + c / 10 % 10);
+ out[2] = static_cast<Char>('0' + c % 10);
+ out[3] = static_cast<Char>(delimiter);
+ }
+ static FMT_CONSTEXPR bool has_emphasis(emphasis em, emphasis mask) noexcept {
+ return static_cast<uint8_t>(em) & static_cast<uint8_t>(mask);
+ }
+};
+
+template <typename Char>
+FMT_CONSTEXPR ansi_color_escape<Char> make_foreground_color(
+ detail::color_type foreground) noexcept {
+ return ansi_color_escape<Char>(foreground, "\x1b[38;2;");
+}
+
+template <typename Char>
+FMT_CONSTEXPR ansi_color_escape<Char> make_background_color(
+ detail::color_type background) noexcept {
+ return ansi_color_escape<Char>(background, "\x1b[48;2;");
+}
+
+template <typename Char>
+FMT_CONSTEXPR ansi_color_escape<Char> make_emphasis(emphasis em) noexcept {
+ return ansi_color_escape<Char>(em);
+}
+
+template <typename Char> inline void reset_color(buffer<Char>& buffer) {
+ auto reset_color = string_view("\x1b[0m");
+ buffer.append(reset_color.begin(), reset_color.end());
+}
+
+template <typename T> struct styled_arg {
+ const T& value;
+ text_style style;
+};
+
+template <typename Char>
+void vformat_to(buffer<Char>& buf, const text_style& ts,
+ basic_string_view<Char> format_str,
+ basic_format_args<buffer_context<type_identity_t<Char>>> args) {
+ bool has_style = false;
+ if (ts.has_emphasis()) {
+ has_style = true;
+ auto emphasis = detail::make_emphasis<Char>(ts.get_emphasis());
+ buf.append(emphasis.begin(), emphasis.end());
+ }
+ if (ts.has_foreground()) {
+ has_style = true;
+ auto foreground = detail::make_foreground_color<Char>(ts.get_foreground());
+ buf.append(foreground.begin(), foreground.end());
+ }
+ if (ts.has_background()) {
+ has_style = true;
+ auto background = detail::make_background_color<Char>(ts.get_background());
+ buf.append(background.begin(), background.end());
+ }
+ detail::vformat_to(buf, format_str, args, {});
+ if (has_style) detail::reset_color<Char>(buf);
+}
+
+FMT_END_DETAIL_NAMESPACE
+
+inline void vprint(std::FILE* f, const text_style& ts, string_view fmt,
+ format_args args) {
+ // Legacy wide streams are not supported.
+ auto buf = memory_buffer();
+ detail::vformat_to(buf, ts, fmt, args);
+ if (detail::is_utf8()) {
+ detail::print(f, string_view(buf.begin(), buf.size()));
+ return;
+ }
+ buf.push_back('\0');
+ int result = std::fputs(buf.data(), f);
+ if (result < 0)
+ FMT_THROW(system_error(errno, FMT_STRING("cannot write to file")));
+}
+
+/**
+ \rst
+ Formats a string and prints it to the specified file stream using ANSI
+ escape sequences to specify text formatting.
+
+ **Example**::
+
+ fmt::print(fmt::emphasis::bold | fg(fmt::color::red),
+ "Elapsed time: {0:.2f} seconds", 1.23);
+ \endrst
+ */
+template <typename S, typename... Args,
+ FMT_ENABLE_IF(detail::is_string<S>::value)>
+void print(std::FILE* f, const text_style& ts, const S& format_str,
+ const Args&... args) {
+ vprint(f, ts, format_str,
+ fmt::make_format_args<buffer_context<char_t<S>>>(args...));
+}
+
+/**
+ \rst
+ Formats a string and prints it to stdout using ANSI escape sequences to
+ specify text formatting.
+
+ **Example**::
+
+ fmt::print(fmt::emphasis::bold | fg(fmt::color::red),
+ "Elapsed time: {0:.2f} seconds", 1.23);
+ \endrst
+ */
+template <typename S, typename... Args,
+ FMT_ENABLE_IF(detail::is_string<S>::value)>
+void print(const text_style& ts, const S& format_str, const Args&... args) {
+ return print(stdout, ts, format_str, args...);
+}
+
+template <typename S, typename Char = char_t<S>>
+inline std::basic_string<Char> vformat(
+ const text_style& ts, const S& format_str,
+ basic_format_args<buffer_context<type_identity_t<Char>>> args) {
+ basic_memory_buffer<Char> buf;
+ detail::vformat_to(buf, ts, detail::to_string_view(format_str), args);
+ return fmt::to_string(buf);
+}
+
+/**
+ \rst
+ Formats arguments and returns the result as a string using ANSI
+ escape sequences to specify text formatting.
+
+ **Example**::
+
+ #include <fmt/color.h>
+ std::string message = fmt::format(fmt::emphasis::bold | fg(fmt::color::red),
+ "The answer is {}", 42);
+ \endrst
+*/
+template <typename S, typename... Args, typename Char = char_t<S>>
+inline std::basic_string<Char> format(const text_style& ts, const S& format_str,
+ const Args&... args) {
+ return fmt::vformat(ts, detail::to_string_view(format_str),
+ fmt::make_format_args<buffer_context<Char>>(args...));
+}
+
+/**
+ Formats a string with the given text_style and writes the output to ``out``.
+ */
+template <typename OutputIt, typename Char,
+ FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value)>
+OutputIt vformat_to(
+ OutputIt out, const text_style& ts, basic_string_view<Char> format_str,
+ basic_format_args<buffer_context<type_identity_t<Char>>> args) {
+ auto&& buf = detail::get_buffer<Char>(out);
+ detail::vformat_to(buf, ts, format_str, args);
+ return detail::get_iterator(buf, out);
+}
+
+/**
+ \rst
+ Formats arguments with the given text_style, writes the result to the output
+ iterator ``out`` and returns the iterator past the end of the output range.
+
+ **Example**::
+
+ std::vector<char> out;
+ fmt::format_to(std::back_inserter(out),
+ fmt::emphasis::bold | fg(fmt::color::red), "{}", 42);
+ \endrst
+*/
+template <typename OutputIt, typename S, typename... Args,
+ bool enable = detail::is_output_iterator<OutputIt, char_t<S>>::value&&
+ detail::is_string<S>::value>
+inline auto format_to(OutputIt out, const text_style& ts, const S& format_str,
+ Args&&... args) ->
+ typename std::enable_if<enable, OutputIt>::type {
+ return vformat_to(out, ts, detail::to_string_view(format_str),
+ fmt::make_format_args<buffer_context<char_t<S>>>(args...));
+}
+
+template <typename T, typename Char>
+struct formatter<detail::styled_arg<T>, Char> : formatter<T, Char> {
+ template <typename FormatContext>
+ auto format(const detail::styled_arg<T>& arg, FormatContext& ctx) const
+ -> decltype(ctx.out()) {
+ const auto& ts = arg.style;
+ const auto& value = arg.value;
+ auto out = ctx.out();
+
+ bool has_style = false;
+ if (ts.has_emphasis()) {
+ has_style = true;
+ auto emphasis = detail::make_emphasis<Char>(ts.get_emphasis());
+ out = std::copy(emphasis.begin(), emphasis.end(), out);
+ }
+ if (ts.has_foreground()) {
+ has_style = true;
+ auto foreground =
+ detail::make_foreground_color<Char>(ts.get_foreground());
+ out = std::copy(foreground.begin(), foreground.end(), out);
+ }
+ if (ts.has_background()) {
+ has_style = true;
+ auto background =
+ detail::make_background_color<Char>(ts.get_background());
+ out = std::copy(background.begin(), background.end(), out);
+ }
+ out = formatter<T, Char>::format(value, ctx);
+ if (has_style) {
+ auto reset_color = string_view("\x1b[0m");
+ out = std::copy(reset_color.begin(), reset_color.end(), out);
+ }
+ return out;
+ }
+};
+
+/**
+ \rst
+ Returns an argument that will be formatted using ANSI escape sequences,
+ to be used in a formatting function.
+
+ **Example**::
+
+ fmt::print("Elapsed time: {0:.2f} seconds",
+ fmt::styled(1.23, fmt::fg(fmt::color::green) |
+ fmt::bg(fmt::color::blue)));
+ \endrst
+ */
+template <typename T>
+FMT_CONSTEXPR auto styled(const T& value, text_style ts)
+ -> detail::styled_arg<remove_cvref_t<T>> {
+ return detail::styled_arg<remove_cvref_t<T>>{value, ts};
+}
+
+FMT_END_EXPORT
+FMT_END_NAMESPACE
+
+#endif // FMT_COLOR_H_
diff --git a/contrib/fmt/include/fmt/compile.h b/contrib/fmt/include/fmt/compile.h
new file mode 100644
index 0000000..94e13c0
--- /dev/null
+++ b/contrib/fmt/include/fmt/compile.h
@@ -0,0 +1,607 @@
+// Formatting library for C++ - experimental format string compilation
+//
+// Copyright (c) 2012 - present, Victor Zverovich and fmt contributors
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_COMPILE_H_
+#define FMT_COMPILE_H_
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+namespace detail {
+
+template <typename Char, typename InputIt>
+FMT_CONSTEXPR inline counting_iterator copy_str(InputIt begin, InputIt end,
+ counting_iterator it) {
+ return it + (end - begin);
+}
+
+template <typename OutputIt> class truncating_iterator_base {
+ protected:
+ OutputIt out_;
+ size_t limit_;
+ size_t count_ = 0;
+
+ truncating_iterator_base() : out_(), limit_(0) {}
+
+ truncating_iterator_base(OutputIt out, size_t limit)
+ : out_(out), limit_(limit) {}
+
+ public:
+ using iterator_category = std::output_iterator_tag;
+ using value_type = typename std::iterator_traits<OutputIt>::value_type;
+ using difference_type = std::ptrdiff_t;
+ using pointer = void;
+ using reference = void;
+ FMT_UNCHECKED_ITERATOR(truncating_iterator_base);
+
+ OutputIt base() const { return out_; }
+ size_t count() const { return count_; }
+};
+
+// An output iterator that truncates the output and counts the number of objects
+// written to it.
+template <typename OutputIt,
+ typename Enable = typename std::is_void<
+ typename std::iterator_traits<OutputIt>::value_type>::type>
+class truncating_iterator;
+
+template <typename OutputIt>
+class truncating_iterator<OutputIt, std::false_type>
+ : public truncating_iterator_base<OutputIt> {
+ mutable typename truncating_iterator_base<OutputIt>::value_type blackhole_;
+
+ public:
+ using value_type = typename truncating_iterator_base<OutputIt>::value_type;
+
+ truncating_iterator() = default;
+
+ truncating_iterator(OutputIt out, size_t limit)
+ : truncating_iterator_base<OutputIt>(out, limit) {}
+
+ truncating_iterator& operator++() {
+ if (this->count_++ < this->limit_) ++this->out_;
+ return *this;
+ }
+
+ truncating_iterator operator++(int) {
+ auto it = *this;
+ ++*this;
+ return it;
+ }
+
+ value_type& operator*() const {
+ return this->count_ < this->limit_ ? *this->out_ : blackhole_;
+ }
+};
+
+template <typename OutputIt>
+class truncating_iterator<OutputIt, std::true_type>
+ : public truncating_iterator_base<OutputIt> {
+ public:
+ truncating_iterator() = default;
+
+ truncating_iterator(OutputIt out, size_t limit)
+ : truncating_iterator_base<OutputIt>(out, limit) {}
+
+ template <typename T> truncating_iterator& operator=(T val) {
+ if (this->count_++ < this->limit_) *this->out_++ = val;
+ return *this;
+ }
+
+ truncating_iterator& operator++() { return *this; }
+ truncating_iterator& operator++(int) { return *this; }
+ truncating_iterator& operator*() { return *this; }
+};
+
+// A compile-time string which is compiled into fast formatting code.
+class compiled_string {};
+
+template <typename S>
+struct is_compiled_string : std::is_base_of<compiled_string, S> {};
+
+/**
+ \rst
+ Converts a string literal *s* into a format string that will be parsed at
+ compile time and converted into efficient formatting code. Requires C++17
+ ``constexpr if`` compiler support.
+
+ **Example**::
+
+ // Converts 42 into std::string using the most efficient method and no
+ // runtime format string processing.
+ std::string s = fmt::format(FMT_COMPILE("{}"), 42);
+ \endrst
+ */
+#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
+# define FMT_COMPILE(s) \
+ FMT_STRING_IMPL(s, fmt::detail::compiled_string, explicit)
+#else
+# define FMT_COMPILE(s) FMT_STRING(s)
+#endif
+
+#if FMT_USE_NONTYPE_TEMPLATE_ARGS
+template <typename Char, size_t N,
+ fmt::detail_exported::fixed_string<Char, N> Str>
+struct udl_compiled_string : compiled_string {
+ using char_type = Char;
+ explicit constexpr operator basic_string_view<char_type>() const {
+ return {Str.data, N - 1};
+ }
+};
+#endif
+
+template <typename T, typename... Tail>
+const T& first(const T& value, const Tail&...) {
+ return value;
+}
+
+#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
+template <typename... Args> struct type_list {};
+
+// Returns a reference to the argument at index N from [first, rest...].
+template <int N, typename T, typename... Args>
+constexpr const auto& get([[maybe_unused]] const T& first,
+ [[maybe_unused]] const Args&... rest) {
+ static_assert(N < 1 + sizeof...(Args), "index is out of bounds");
+ if constexpr (N == 0)
+ return first;
+ else
+ return detail::get<N - 1>(rest...);
+}
+
+template <typename Char, typename... Args>
+constexpr int get_arg_index_by_name(basic_string_view<Char> name,
+ type_list<Args...>) {
+ return get_arg_index_by_name<Args...>(name);
+}
+
+template <int N, typename> struct get_type_impl;
+
+template <int N, typename... Args> struct get_type_impl<N, type_list<Args...>> {
+ using type =
+ remove_cvref_t<decltype(detail::get<N>(std::declval<Args>()...))>;
+};
+
+template <int N, typename T>
+using get_type = typename get_type_impl<N, T>::type;
+
+template <typename T> struct is_compiled_format : std::false_type {};
+
+template <typename Char> struct text {
+ basic_string_view<Char> data;
+ using char_type = Char;
+
+ template <typename OutputIt, typename... Args>
+ constexpr OutputIt format(OutputIt out, const Args&...) const {
+ return write<Char>(out, data);
+ }
+};
+
+template <typename Char>
+struct is_compiled_format<text<Char>> : std::true_type {};
+
+template <typename Char>
+constexpr text<Char> make_text(basic_string_view<Char> s, size_t pos,
+ size_t size) {
+ return {{&s[pos], size}};
+}
+
+template <typename Char> struct code_unit {
+ Char value;
+ using char_type = Char;
+
+ template <typename OutputIt, typename... Args>
+ constexpr OutputIt format(OutputIt out, const Args&...) const {
+ return write<Char>(out, value);
+ }
+};
+
+// This ensures that the argument type is convertible to `const T&`.
+template <typename T, int N, typename... Args>
+constexpr const T& get_arg_checked(const Args&... args) {
+ const auto& arg = detail::get<N>(args...);
+ if constexpr (detail::is_named_arg<remove_cvref_t<decltype(arg)>>()) {
+ return arg.value;
+ } else {
+ return arg;
+ }
+}
+
+template <typename Char>
+struct is_compiled_format<code_unit<Char>> : std::true_type {};
+
+// A replacement field that refers to argument N.
+template <typename Char, typename T, int N> struct field {
+ using char_type = Char;
+
+ template <typename OutputIt, typename... Args>
+ constexpr OutputIt format(OutputIt out, const Args&... args) const {
+ return write<Char>(out, get_arg_checked<T, N>(args...));
+ }
+};
+
+template <typename Char, typename T, int N>
+struct is_compiled_format<field<Char, T, N>> : std::true_type {};
+
+// A replacement field that refers to argument with name.
+template <typename Char> struct runtime_named_field {
+ using char_type = Char;
+ basic_string_view<Char> name;
+
+ template <typename OutputIt, typename T>
+ constexpr static bool try_format_argument(
+ OutputIt& out,
+ // [[maybe_unused]] due to unused-but-set-parameter warning in GCC 7,8,9
+ [[maybe_unused]] basic_string_view<Char> arg_name, const T& arg) {
+ if constexpr (is_named_arg<typename std::remove_cv<T>::type>::value) {
+ if (arg_name == arg.name) {
+ out = write<Char>(out, arg.value);
+ return true;
+ }
+ }
+ return false;
+ }
+
+ template <typename OutputIt, typename... Args>
+ constexpr OutputIt format(OutputIt out, const Args&... args) const {
+ bool found = (try_format_argument(out, name, args) || ...);
+ if (!found) {
+ FMT_THROW(format_error("argument with specified name is not found"));
+ }
+ return out;
+ }
+};
+
+template <typename Char>
+struct is_compiled_format<runtime_named_field<Char>> : std::true_type {};
+
+// A replacement field that refers to argument N and has format specifiers.
+template <typename Char, typename T, int N> struct spec_field {
+ using char_type = Char;
+ formatter<T, Char> fmt;
+
+ template <typename OutputIt, typename... Args>
+ constexpr FMT_INLINE OutputIt format(OutputIt out,
+ const Args&... args) const {
+ const auto& vargs =
+ fmt::make_format_args<basic_format_context<OutputIt, Char>>(args...);
+ basic_format_context<OutputIt, Char> ctx(out, vargs);
+ return fmt.format(get_arg_checked<T, N>(args...), ctx);
+ }
+};
+
+template <typename Char, typename T, int N>
+struct is_compiled_format<spec_field<Char, T, N>> : std::true_type {};
+
+template <typename L, typename R> struct concat {
+ L lhs;
+ R rhs;
+ using char_type = typename L::char_type;
+
+ template <typename OutputIt, typename... Args>
+ constexpr OutputIt format(OutputIt out, const Args&... args) const {
+ out = lhs.format(out, args...);
+ return rhs.format(out, args...);
+ }
+};
+
+template <typename L, typename R>
+struct is_compiled_format<concat<L, R>> : std::true_type {};
+
+template <typename L, typename R>
+constexpr concat<L, R> make_concat(L lhs, R rhs) {
+ return {lhs, rhs};
+}
+
+struct unknown_format {};
+
+template <typename Char>
+constexpr size_t parse_text(basic_string_view<Char> str, size_t pos) {
+ for (size_t size = str.size(); pos != size; ++pos) {
+ if (str[pos] == '{' || str[pos] == '}') break;
+ }
+ return pos;
+}
+
+template <typename Args, size_t POS, int ID, typename S>
+constexpr auto compile_format_string(S format_str);
+
+template <typename Args, size_t POS, int ID, typename T, typename S>
+constexpr auto parse_tail(T head, S format_str) {
+ if constexpr (POS !=
+ basic_string_view<typename S::char_type>(format_str).size()) {
+ constexpr auto tail = compile_format_string<Args, POS, ID>(format_str);
+ if constexpr (std::is_same<remove_cvref_t<decltype(tail)>,
+ unknown_format>())
+ return tail;
+ else
+ return make_concat(head, tail);
+ } else {
+ return head;
+ }
+}
+
+template <typename T, typename Char> struct parse_specs_result {
+ formatter<T, Char> fmt;
+ size_t end;
+ int next_arg_id;
+};
+
+enum { manual_indexing_id = -1 };
+
+template <typename T, typename Char>
+constexpr parse_specs_result<T, Char> parse_specs(basic_string_view<Char> str,
+ size_t pos, int next_arg_id) {
+ str.remove_prefix(pos);
+ auto ctx =
+ compile_parse_context<Char>(str, max_value<int>(), nullptr, next_arg_id);
+ auto f = formatter<T, Char>();
+ auto end = f.parse(ctx);
+ return {f, pos + fmt::detail::to_unsigned(end - str.data()),
+ next_arg_id == 0 ? manual_indexing_id : ctx.next_arg_id()};
+}
+
+template <typename Char> struct arg_id_handler {
+ arg_ref<Char> arg_id;
+
+ constexpr int on_auto() {
+ FMT_ASSERT(false, "handler cannot be used with automatic indexing");
+ return 0;
+ }
+ constexpr int on_index(int id) {
+ arg_id = arg_ref<Char>(id);
+ return 0;
+ }
+ constexpr int on_name(basic_string_view<Char> id) {
+ arg_id = arg_ref<Char>(id);
+ return 0;
+ }
+};
+
+template <typename Char> struct parse_arg_id_result {
+ arg_ref<Char> arg_id;
+ const Char* arg_id_end;
+};
+
+template <int ID, typename Char>
+constexpr auto parse_arg_id(const Char* begin, const Char* end) {
+ auto handler = arg_id_handler<Char>{arg_ref<Char>{}};
+ auto arg_id_end = parse_arg_id(begin, end, handler);
+ return parse_arg_id_result<Char>{handler.arg_id, arg_id_end};
+}
+
+template <typename T, typename Enable = void> struct field_type {
+ using type = remove_cvref_t<T>;
+};
+
+template <typename T>
+struct field_type<T, enable_if_t<detail::is_named_arg<T>::value>> {
+ using type = remove_cvref_t<decltype(T::value)>;
+};
+
+template <typename T, typename Args, size_t END_POS, int ARG_INDEX, int NEXT_ID,
+ typename S>
+constexpr auto parse_replacement_field_then_tail(S format_str) {
+ using char_type = typename S::char_type;
+ constexpr auto str = basic_string_view<char_type>(format_str);
+ constexpr char_type c = END_POS != str.size() ? str[END_POS] : char_type();
+ if constexpr (c == '}') {
+ return parse_tail<Args, END_POS + 1, NEXT_ID>(
+ field<char_type, typename field_type<T>::type, ARG_INDEX>(),
+ format_str);
+ } else if constexpr (c != ':') {
+ FMT_THROW(format_error("expected ':'"));
+ } else {
+ constexpr auto result = parse_specs<typename field_type<T>::type>(
+ str, END_POS + 1, NEXT_ID == manual_indexing_id ? 0 : NEXT_ID);
+ if constexpr (result.end >= str.size() || str[result.end] != '}') {
+ FMT_THROW(format_error("expected '}'"));
+ return 0;
+ } else {
+ return parse_tail<Args, result.end + 1, result.next_arg_id>(
+ spec_field<char_type, typename field_type<T>::type, ARG_INDEX>{
+ result.fmt},
+ format_str);
+ }
+ }
+}
+
+// Compiles a non-empty format string and returns the compiled representation
+// or unknown_format() on unrecognized input.
+template <typename Args, size_t POS, int ID, typename S>
+constexpr auto compile_format_string(S format_str) {
+ using char_type = typename S::char_type;
+ constexpr auto str = basic_string_view<char_type>(format_str);
+ if constexpr (str[POS] == '{') {
+ if constexpr (POS + 1 == str.size())
+ FMT_THROW(format_error("unmatched '{' in format string"));
+ if constexpr (str[POS + 1] == '{') {
+ return parse_tail<Args, POS + 2, ID>(make_text(str, POS, 1), format_str);
+ } else if constexpr (str[POS + 1] == '}' || str[POS + 1] == ':') {
+ static_assert(ID != manual_indexing_id,
+ "cannot switch from manual to automatic argument indexing");
+ constexpr auto next_id =
+ ID != manual_indexing_id ? ID + 1 : manual_indexing_id;
+ return parse_replacement_field_then_tail<get_type<ID, Args>, Args,
+ POS + 1, ID, next_id>(
+ format_str);
+ } else {
+ constexpr auto arg_id_result =
+ parse_arg_id<ID>(str.data() + POS + 1, str.data() + str.size());
+ constexpr auto arg_id_end_pos = arg_id_result.arg_id_end - str.data();
+ constexpr char_type c =
+ arg_id_end_pos != str.size() ? str[arg_id_end_pos] : char_type();
+ static_assert(c == '}' || c == ':', "missing '}' in format string");
+ if constexpr (arg_id_result.arg_id.kind == arg_id_kind::index) {
+ static_assert(
+ ID == manual_indexing_id || ID == 0,
+ "cannot switch from automatic to manual argument indexing");
+ constexpr auto arg_index = arg_id_result.arg_id.val.index;
+ return parse_replacement_field_then_tail<get_type<arg_index, Args>,
+ Args, arg_id_end_pos,
+ arg_index, manual_indexing_id>(
+ format_str);
+ } else if constexpr (arg_id_result.arg_id.kind == arg_id_kind::name) {
+ constexpr auto arg_index =
+ get_arg_index_by_name(arg_id_result.arg_id.val.name, Args{});
+ if constexpr (arg_index != invalid_arg_index) {
+ constexpr auto next_id =
+ ID != manual_indexing_id ? ID + 1 : manual_indexing_id;
+ return parse_replacement_field_then_tail<
+ decltype(get_type<arg_index, Args>::value), Args, arg_id_end_pos,
+ arg_index, next_id>(format_str);
+ } else {
+ if constexpr (c == '}') {
+ return parse_tail<Args, arg_id_end_pos + 1, ID>(
+ runtime_named_field<char_type>{arg_id_result.arg_id.val.name},
+ format_str);
+ } else if constexpr (c == ':') {
+ return unknown_format(); // no type info for specs parsing
+ }
+ }
+ }
+ }
+ } else if constexpr (str[POS] == '}') {
+ if constexpr (POS + 1 == str.size())
+ FMT_THROW(format_error("unmatched '}' in format string"));
+ return parse_tail<Args, POS + 2, ID>(make_text(str, POS, 1), format_str);
+ } else {
+ constexpr auto end = parse_text(str, POS + 1);
+ if constexpr (end - POS > 1) {
+ return parse_tail<Args, end, ID>(make_text(str, POS, end - POS),
+ format_str);
+ } else {
+ return parse_tail<Args, end, ID>(code_unit<char_type>{str[POS]},
+ format_str);
+ }
+ }
+}
+
+template <typename... Args, typename S,
+ FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+constexpr auto compile(S format_str) {
+ constexpr auto str = basic_string_view<typename S::char_type>(format_str);
+ if constexpr (str.size() == 0) {
+ return detail::make_text(str, 0, 0);
+ } else {
+ constexpr auto result =
+ detail::compile_format_string<detail::type_list<Args...>, 0, 0>(
+ format_str);
+ return result;
+ }
+}
+#endif // defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
+} // namespace detail
+
+FMT_BEGIN_EXPORT
+
+#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
+
+template <typename CompiledFormat, typename... Args,
+ typename Char = typename CompiledFormat::char_type,
+ FMT_ENABLE_IF(detail::is_compiled_format<CompiledFormat>::value)>
+FMT_INLINE std::basic_string<Char> format(const CompiledFormat& cf,
+ const Args&... args) {
+ auto s = std::basic_string<Char>();
+ cf.format(std::back_inserter(s), args...);
+ return s;
+}
+
+template <typename OutputIt, typename CompiledFormat, typename... Args,
+ FMT_ENABLE_IF(detail::is_compiled_format<CompiledFormat>::value)>
+constexpr FMT_INLINE OutputIt format_to(OutputIt out, const CompiledFormat& cf,
+ const Args&... args) {
+ return cf.format(out, args...);
+}
+
+template <typename S, typename... Args,
+ FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+FMT_INLINE std::basic_string<typename S::char_type> format(const S&,
+ Args&&... args) {
+ if constexpr (std::is_same<typename S::char_type, char>::value) {
+ constexpr auto str = basic_string_view<typename S::char_type>(S());
+ if constexpr (str.size() == 2 && str[0] == '{' && str[1] == '}') {
+ const auto& first = detail::first(args...);
+ if constexpr (detail::is_named_arg<
+ remove_cvref_t<decltype(first)>>::value) {
+ return fmt::to_string(first.value);
+ } else {
+ return fmt::to_string(first);
+ }
+ }
+ }
+ constexpr auto compiled = detail::compile<Args...>(S());
+ if constexpr (std::is_same<remove_cvref_t<decltype(compiled)>,
+ detail::unknown_format>()) {
+ return fmt::format(
+ static_cast<basic_string_view<typename S::char_type>>(S()),
+ std::forward<Args>(args)...);
+ } else {
+ return fmt::format(compiled, std::forward<Args>(args)...);
+ }
+}
+
+template <typename OutputIt, typename S, typename... Args,
+ FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+FMT_CONSTEXPR OutputIt format_to(OutputIt out, const S&, Args&&... args) {
+ constexpr auto compiled = detail::compile<Args...>(S());
+ if constexpr (std::is_same<remove_cvref_t<decltype(compiled)>,
+ detail::unknown_format>()) {
+ return fmt::format_to(
+ out, static_cast<basic_string_view<typename S::char_type>>(S()),
+ std::forward<Args>(args)...);
+ } else {
+ return fmt::format_to(out, compiled, std::forward<Args>(args)...);
+ }
+}
+#endif
+
+template <typename OutputIt, typename S, typename... Args,
+ FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+format_to_n_result<OutputIt> format_to_n(OutputIt out, size_t n,
+ const S& format_str, Args&&... args) {
+ auto it = fmt::format_to(detail::truncating_iterator<OutputIt>(out, n),
+ format_str, std::forward<Args>(args)...);
+ return {it.base(), it.count()};
+}
+
+template <typename S, typename... Args,
+ FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+FMT_CONSTEXPR20 size_t formatted_size(const S& format_str,
+ const Args&... args) {
+ return fmt::format_to(detail::counting_iterator(), format_str, args...)
+ .count();
+}
+
+template <typename S, typename... Args,
+ FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+void print(std::FILE* f, const S& format_str, const Args&... args) {
+ memory_buffer buffer;
+ fmt::format_to(std::back_inserter(buffer), format_str, args...);
+ detail::print(f, {buffer.data(), buffer.size()});
+}
+
+template <typename S, typename... Args,
+ FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+void print(const S& format_str, const Args&... args) {
+ print(stdout, format_str, args...);
+}
+
+#if FMT_USE_NONTYPE_TEMPLATE_ARGS
+inline namespace literals {
+template <detail_exported::fixed_string Str> constexpr auto operator""_cf() {
+ using char_t = remove_cvref_t<decltype(Str.data[0])>;
+ return detail::udl_compiled_string<char_t, sizeof(Str.data) / sizeof(char_t),
+ Str>();
+}
+} // namespace literals
+#endif
+
+FMT_END_EXPORT
+FMT_END_NAMESPACE
+
+#endif // FMT_COMPILE_H_
diff --git a/contrib/fmt/include/fmt/core.h b/contrib/fmt/include/fmt/core.h
new file mode 100644
index 0000000..46723d5
--- /dev/null
+++ b/contrib/fmt/include/fmt/core.h
@@ -0,0 +1,2951 @@
+// Formatting library for C++ - the core API for char/UTF-8
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_CORE_H_
+#define FMT_CORE_H_
+
+#include <cstddef> // std::byte
+#include <cstdio> // std::FILE
+#include <cstring> // std::strlen
+#include <iterator>
+#include <limits>
+#include <string>
+#include <type_traits>
+
+// The fmt library version in the form major * 10000 + minor * 100 + patch.
+#define FMT_VERSION 100000
+
+#if defined(__clang__) && !defined(__ibmxl__)
+# define FMT_CLANG_VERSION (__clang_major__ * 100 + __clang_minor__)
+#else
+# define FMT_CLANG_VERSION 0
+#endif
+
+#if defined(__GNUC__) && !defined(__clang__) && !defined(__INTEL_COMPILER) && \
+ !defined(__NVCOMPILER)
+# define FMT_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
+#else
+# define FMT_GCC_VERSION 0
+#endif
+
+#ifndef FMT_GCC_PRAGMA
+// Workaround _Pragma bug https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59884.
+# if FMT_GCC_VERSION >= 504
+# define FMT_GCC_PRAGMA(arg) _Pragma(arg)
+# else
+# define FMT_GCC_PRAGMA(arg)
+# endif
+#endif
+
+#ifdef __ICL
+# define FMT_ICC_VERSION __ICL
+#elif defined(__INTEL_COMPILER)
+# define FMT_ICC_VERSION __INTEL_COMPILER
+#else
+# define FMT_ICC_VERSION 0
+#endif
+
+#ifdef _MSC_VER
+# define FMT_MSC_VERSION _MSC_VER
+# define FMT_MSC_WARNING(...) __pragma(warning(__VA_ARGS__))
+#else
+# define FMT_MSC_VERSION 0
+# define FMT_MSC_WARNING(...)
+#endif
+
+#ifdef _MSVC_LANG
+# define FMT_CPLUSPLUS _MSVC_LANG
+#else
+# define FMT_CPLUSPLUS __cplusplus
+#endif
+
+#ifdef __has_feature
+# define FMT_HAS_FEATURE(x) __has_feature(x)
+#else
+# define FMT_HAS_FEATURE(x) 0
+#endif
+
+#if defined(__has_include) || FMT_ICC_VERSION >= 1600 || FMT_MSC_VERSION > 1900
+# define FMT_HAS_INCLUDE(x) __has_include(x)
+#else
+# define FMT_HAS_INCLUDE(x) 0
+#endif
+
+#ifdef __has_cpp_attribute
+# define FMT_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x)
+#else
+# define FMT_HAS_CPP_ATTRIBUTE(x) 0
+#endif
+
+#define FMT_HAS_CPP14_ATTRIBUTE(attribute) \
+ (FMT_CPLUSPLUS >= 201402L && FMT_HAS_CPP_ATTRIBUTE(attribute))
+
+#define FMT_HAS_CPP17_ATTRIBUTE(attribute) \
+ (FMT_CPLUSPLUS >= 201703L && FMT_HAS_CPP_ATTRIBUTE(attribute))
+
+// Check if relaxed C++14 constexpr is supported.
+// GCC doesn't allow throw in constexpr until version 6 (bug 67371).
+#ifndef FMT_USE_CONSTEXPR
+# if (FMT_HAS_FEATURE(cxx_relaxed_constexpr) || FMT_MSC_VERSION >= 1912 || \
+ (FMT_GCC_VERSION >= 600 && FMT_CPLUSPLUS >= 201402L)) && \
+ !FMT_ICC_VERSION && !defined(__NVCC__)
+# define FMT_USE_CONSTEXPR 1
+# else
+# define FMT_USE_CONSTEXPR 0
+# endif
+#endif
+#if FMT_USE_CONSTEXPR
+# define FMT_CONSTEXPR constexpr
+#else
+# define FMT_CONSTEXPR
+#endif
+
+#if ((FMT_CPLUSPLUS >= 202002L) && \
+ (!defined(_GLIBCXX_RELEASE) || _GLIBCXX_RELEASE > 9)) || \
+ (FMT_CPLUSPLUS >= 201709L && FMT_GCC_VERSION >= 1002)
+# define FMT_CONSTEXPR20 constexpr
+#else
+# define FMT_CONSTEXPR20
+#endif
+
+// Check if constexpr std::char_traits<>::{compare,length} are supported.
+#if defined(__GLIBCXX__)
+# if FMT_CPLUSPLUS >= 201703L && defined(_GLIBCXX_RELEASE) && \
+ _GLIBCXX_RELEASE >= 7 // GCC 7+ libstdc++ has _GLIBCXX_RELEASE.
+# define FMT_CONSTEXPR_CHAR_TRAITS constexpr
+# endif
+#elif defined(_LIBCPP_VERSION) && FMT_CPLUSPLUS >= 201703L && \
+ _LIBCPP_VERSION >= 4000
+# define FMT_CONSTEXPR_CHAR_TRAITS constexpr
+#elif FMT_MSC_VERSION >= 1914 && FMT_CPLUSPLUS >= 201703L
+# define FMT_CONSTEXPR_CHAR_TRAITS constexpr
+#endif
+#ifndef FMT_CONSTEXPR_CHAR_TRAITS
+# define FMT_CONSTEXPR_CHAR_TRAITS
+#endif
+
+// Check if exceptions are disabled.
+#ifndef FMT_EXCEPTIONS
+# if (defined(__GNUC__) && !defined(__EXCEPTIONS)) || \
+ (FMT_MSC_VERSION && !_HAS_EXCEPTIONS)
+# define FMT_EXCEPTIONS 0
+# else
+# define FMT_EXCEPTIONS 1
+# endif
+#endif
+
+// Disable [[noreturn]] on MSVC/NVCC because of bogus unreachable code warnings.
+#if FMT_EXCEPTIONS && FMT_HAS_CPP_ATTRIBUTE(noreturn) && !FMT_MSC_VERSION && \
+ !defined(__NVCC__)
+# define FMT_NORETURN [[noreturn]]
+#else
+# define FMT_NORETURN
+#endif
+
+#ifndef FMT_NODISCARD
+# if FMT_HAS_CPP17_ATTRIBUTE(nodiscard)
+# define FMT_NODISCARD [[nodiscard]]
+# else
+# define FMT_NODISCARD
+# endif
+#endif
+
+#ifndef FMT_INLINE
+# if FMT_GCC_VERSION || FMT_CLANG_VERSION
+# define FMT_INLINE inline __attribute__((always_inline))
+# else
+# define FMT_INLINE inline
+# endif
+#endif
+
+// An inline std::forward replacement.
+#define FMT_FORWARD(...) static_cast<decltype(__VA_ARGS__)&&>(__VA_ARGS__)
+
+#ifdef _MSC_VER
+# define FMT_UNCHECKED_ITERATOR(It) \
+ using _Unchecked_type = It // Mark iterator as checked.
+#else
+# define FMT_UNCHECKED_ITERATOR(It) using unchecked_type = It
+#endif
+
+#ifndef FMT_BEGIN_NAMESPACE
+# define FMT_BEGIN_NAMESPACE \
+ namespace fmt { \
+ inline namespace v10 {
+# define FMT_END_NAMESPACE \
+ } \
+ }
+#endif
+
+#ifndef FMT_MODULE_EXPORT
+# define FMT_MODULE_EXPORT
+# define FMT_BEGIN_EXPORT
+# define FMT_END_EXPORT
+#endif
+
+#if !defined(FMT_HEADER_ONLY) && defined(_WIN32)
+# ifdef FMT_LIB_EXPORT
+# define FMT_API __declspec(dllexport)
+# elif defined(FMT_SHARED)
+# define FMT_API __declspec(dllimport)
+# endif
+#else
+# if defined(FMT_LIB_EXPORT) || defined(FMT_SHARED)
+# if defined(__GNUC__) || defined(__clang__)
+# define FMT_API __attribute__((visibility("default")))
+# endif
+# endif
+#endif
+#ifndef FMT_API
+# define FMT_API
+#endif
+
+// libc++ supports string_view in pre-c++17.
+#if FMT_HAS_INCLUDE(<string_view>) && \
+ (FMT_CPLUSPLUS >= 201703L || defined(_LIBCPP_VERSION))
+# include <string_view>
+# define FMT_USE_STRING_VIEW
+#elif FMT_HAS_INCLUDE("experimental/string_view") && FMT_CPLUSPLUS >= 201402L
+# include <experimental/string_view>
+# define FMT_USE_EXPERIMENTAL_STRING_VIEW
+#endif
+
+#ifndef FMT_UNICODE
+# define FMT_UNICODE !FMT_MSC_VERSION
+#endif
+
+#ifndef FMT_CONSTEVAL
+# if ((FMT_GCC_VERSION >= 1000 || FMT_CLANG_VERSION >= 1101) && \
+ (!defined(__apple_build_version__) || \
+ __apple_build_version__ >= 14000029L) && \
+ FMT_CPLUSPLUS >= 202002L) || \
+ (defined(__cpp_consteval) && \
+ (!FMT_MSC_VERSION || _MSC_FULL_VER >= 193030704))
+// consteval is broken in MSVC before VS2022 and Apple clang before 14.
+# define FMT_CONSTEVAL consteval
+# define FMT_HAS_CONSTEVAL
+# else
+# define FMT_CONSTEVAL
+# endif
+#endif
+
+#ifndef FMT_USE_NONTYPE_TEMPLATE_ARGS
+# if defined(__cpp_nontype_template_args) && \
+ ((FMT_GCC_VERSION >= 903 && FMT_CPLUSPLUS >= 201709L) || \
+ __cpp_nontype_template_args >= 201911L) && \
+ !defined(__NVCOMPILER) && !defined(__LCC__)
+# define FMT_USE_NONTYPE_TEMPLATE_ARGS 1
+# else
+# define FMT_USE_NONTYPE_TEMPLATE_ARGS 0
+# endif
+#endif
+
+#if defined __cpp_inline_variables && __cpp_inline_variables >= 201606L
+# define FMT_INLINE_VARIABLE inline
+#else
+# define FMT_INLINE_VARIABLE
+#endif
+
+// Enable minimal optimizations for more compact code in debug mode.
+FMT_GCC_PRAGMA("GCC push_options")
+#if !defined(__OPTIMIZE__) && !defined(__NVCOMPILER) && !defined(__LCC__) && \
+ !defined(__CUDACC__)
+FMT_GCC_PRAGMA("GCC optimize(\"Og\")")
+#endif
+
+FMT_BEGIN_NAMESPACE
+
+// Implementations of enable_if_t and other metafunctions for older systems.
+template <bool B, typename T = void>
+using enable_if_t = typename std::enable_if<B, T>::type;
+template <bool B, typename T, typename F>
+using conditional_t = typename std::conditional<B, T, F>::type;
+template <bool B> using bool_constant = std::integral_constant<bool, B>;
+template <typename T>
+using remove_reference_t = typename std::remove_reference<T>::type;
+template <typename T>
+using remove_const_t = typename std::remove_const<T>::type;
+template <typename T>
+using remove_cvref_t = typename std::remove_cv<remove_reference_t<T>>::type;
+template <typename T> struct type_identity { using type = T; };
+template <typename T> using type_identity_t = typename type_identity<T>::type;
+template <typename T>
+using underlying_t = typename std::underlying_type<T>::type;
+
+struct monostate {
+ constexpr monostate() {}
+};
+
+// An enable_if helper to be used in template parameters which results in much
+// shorter symbols: https://godbolt.org/z/sWw4vP. Extra parentheses are needed
+// to workaround a bug in MSVC 2019 (see #1140 and #1186).
+#ifdef FMT_DOC
+# define FMT_ENABLE_IF(...)
+#else
+# define FMT_ENABLE_IF(...) fmt::enable_if_t<(__VA_ARGS__), int> = 0
+#endif
+
+#ifdef __cpp_lib_byte
+inline auto format_as(std::byte b) -> unsigned char {
+ return static_cast<unsigned char>(b);
+}
+#endif
+
+namespace detail {
+// Suppresses "unused variable" warnings with the method described in
+// https://herbsutter.com/2009/10/18/mailbag-shutting-up-compiler-warnings/.
+// (void)var does not work on many Intel compilers.
+template <typename... T> FMT_CONSTEXPR void ignore_unused(const T&...) {}
+
+constexpr FMT_INLINE auto is_constant_evaluated(
+ bool default_value = false) noexcept -> bool {
+// Workaround for incompatibility between libstdc++ consteval-based
+// std::is_constant_evaluated() implementation and clang-14.
+// https://github.com/fmtlib/fmt/issues/3247
+#if FMT_CPLUSPLUS >= 202002L && defined(_GLIBCXX_RELEASE) && \
+ _GLIBCXX_RELEASE >= 12 && \
+ (FMT_CLANG_VERSION >= 1400 && FMT_CLANG_VERSION < 1500)
+ ignore_unused(default_value);
+ return __builtin_is_constant_evaluated();
+#elif defined(__cpp_lib_is_constant_evaluated)
+ ignore_unused(default_value);
+ return std::is_constant_evaluated();
+#else
+ return default_value;
+#endif
+}
+
+// Suppresses "conditional expression is constant" warnings.
+template <typename T> constexpr FMT_INLINE auto const_check(T value) -> T {
+ return value;
+}
+
+FMT_NORETURN FMT_API void assert_fail(const char* file, int line,
+ const char* message);
+
+#ifndef FMT_ASSERT
+# ifdef NDEBUG
+// FMT_ASSERT is not empty to avoid -Wempty-body.
+# define FMT_ASSERT(condition, message) \
+ fmt::detail::ignore_unused((condition), (message))
+# else
+# define FMT_ASSERT(condition, message) \
+ ((condition) /* void() fails with -Winvalid-constexpr on clang 4.0.1 */ \
+ ? (void)0 \
+ : fmt::detail::assert_fail(__FILE__, __LINE__, (message)))
+# endif
+#endif
+
+#if defined(FMT_USE_STRING_VIEW)
+template <typename Char> using std_string_view = std::basic_string_view<Char>;
+#elif defined(FMT_USE_EXPERIMENTAL_STRING_VIEW)
+template <typename Char>
+using std_string_view = std::experimental::basic_string_view<Char>;
+#else
+template <typename T> struct std_string_view {};
+#endif
+
+#ifdef FMT_USE_INT128
+// Do nothing.
+#elif defined(__SIZEOF_INT128__) && !defined(__NVCC__) && \
+ !(FMT_CLANG_VERSION && FMT_MSC_VERSION)
+# define FMT_USE_INT128 1
+using int128_opt = __int128_t; // An optional native 128-bit integer.
+using uint128_opt = __uint128_t;
+template <typename T> inline auto convert_for_visit(T value) -> T {
+ return value;
+}
+#else
+# define FMT_USE_INT128 0
+#endif
+#if !FMT_USE_INT128
+enum class int128_opt {};
+enum class uint128_opt {};
+// Reduce template instantiations.
+template <typename T> auto convert_for_visit(T) -> monostate { return {}; }
+#endif
+
+// Casts a nonnegative integer to unsigned.
+template <typename Int>
+FMT_CONSTEXPR auto to_unsigned(Int value) ->
+ typename std::make_unsigned<Int>::type {
+ FMT_ASSERT(std::is_unsigned<Int>::value || value >= 0, "negative value");
+ return static_cast<typename std::make_unsigned<Int>::type>(value);
+}
+
+FMT_CONSTEXPR inline auto is_utf8() -> bool {
+ FMT_MSC_WARNING(suppress : 4566) constexpr unsigned char section[] = "\u00A7";
+
+ // Avoid buggy sign extensions in MSVC's constant evaluation mode (#2297).
+ using uchar = unsigned char;
+ return FMT_UNICODE || (sizeof(section) == 3 && uchar(section[0]) == 0xC2 &&
+ uchar(section[1]) == 0xA7);
+}
+} // namespace detail
+
+/**
+ An implementation of ``std::basic_string_view`` for pre-C++17. It provides a
+ subset of the API. ``fmt::basic_string_view`` is used for format strings even
+ if ``std::string_view`` is available to prevent issues when a library is
+ compiled with a different ``-std`` option than the client code (which is not
+ recommended).
+ */
+FMT_MODULE_EXPORT
+template <typename Char> class basic_string_view {
+ private:
+ const Char* data_;
+ size_t size_;
+
+ public:
+ using value_type = Char;
+ using iterator = const Char*;
+
+ constexpr basic_string_view() noexcept : data_(nullptr), size_(0) {}
+
+ /** Constructs a string reference object from a C string and a size. */
+ constexpr basic_string_view(const Char* s, size_t count) noexcept
+ : data_(s), size_(count) {}
+
+ /**
+ \rst
+ Constructs a string reference object from a C string computing
+ the size with ``std::char_traits<Char>::length``.
+ \endrst
+ */
+ FMT_CONSTEXPR_CHAR_TRAITS
+ FMT_INLINE
+ basic_string_view(const Char* s)
+ : data_(s),
+ size_(detail::const_check(std::is_same<Char, char>::value &&
+ !detail::is_constant_evaluated(true))
+ ? std::strlen(reinterpret_cast<const char*>(s))
+ : std::char_traits<Char>::length(s)) {}
+
+ /** Constructs a string reference from a ``std::basic_string`` object. */
+ template <typename Traits, typename Alloc>
+ FMT_CONSTEXPR basic_string_view(
+ const std::basic_string<Char, Traits, Alloc>& s) noexcept
+ : data_(s.data()), size_(s.size()) {}
+
+ template <typename S, FMT_ENABLE_IF(std::is_same<
+ S, detail::std_string_view<Char>>::value)>
+ FMT_CONSTEXPR basic_string_view(S s) noexcept
+ : data_(s.data()), size_(s.size()) {}
+
+ /** Returns a pointer to the string data. */
+ constexpr auto data() const noexcept -> const Char* { return data_; }
+
+ /** Returns the string size. */
+ constexpr auto size() const noexcept -> size_t { return size_; }
+
+ constexpr auto begin() const noexcept -> iterator { return data_; }
+ constexpr auto end() const noexcept -> iterator { return data_ + size_; }
+
+ constexpr auto operator[](size_t pos) const noexcept -> const Char& {
+ return data_[pos];
+ }
+
+ FMT_CONSTEXPR void remove_prefix(size_t n) noexcept {
+ data_ += n;
+ size_ -= n;
+ }
+
+ FMT_CONSTEXPR_CHAR_TRAITS bool starts_with(
+ basic_string_view<Char> sv) const noexcept {
+ return size_ >= sv.size_ &&
+ std::char_traits<Char>::compare(data_, sv.data_, sv.size_) == 0;
+ }
+ FMT_CONSTEXPR_CHAR_TRAITS bool starts_with(Char c) const noexcept {
+ return size_ >= 1 && std::char_traits<Char>::eq(*data_, c);
+ }
+ FMT_CONSTEXPR_CHAR_TRAITS bool starts_with(const Char* s) const {
+ return starts_with(basic_string_view<Char>(s));
+ }
+
+ // Lexicographically compare this string reference to other.
+ FMT_CONSTEXPR_CHAR_TRAITS auto compare(basic_string_view other) const -> int {
+ size_t str_size = size_ < other.size_ ? size_ : other.size_;
+ int result = std::char_traits<Char>::compare(data_, other.data_, str_size);
+ if (result == 0)
+ result = size_ == other.size_ ? 0 : (size_ < other.size_ ? -1 : 1);
+ return result;
+ }
+
+ FMT_CONSTEXPR_CHAR_TRAITS friend auto operator==(basic_string_view lhs,
+ basic_string_view rhs)
+ -> bool {
+ return lhs.compare(rhs) == 0;
+ }
+ friend auto operator!=(basic_string_view lhs, basic_string_view rhs) -> bool {
+ return lhs.compare(rhs) != 0;
+ }
+ friend auto operator<(basic_string_view lhs, basic_string_view rhs) -> bool {
+ return lhs.compare(rhs) < 0;
+ }
+ friend auto operator<=(basic_string_view lhs, basic_string_view rhs) -> bool {
+ return lhs.compare(rhs) <= 0;
+ }
+ friend auto operator>(basic_string_view lhs, basic_string_view rhs) -> bool {
+ return lhs.compare(rhs) > 0;
+ }
+ friend auto operator>=(basic_string_view lhs, basic_string_view rhs) -> bool {
+ return lhs.compare(rhs) >= 0;
+ }
+};
+
+FMT_MODULE_EXPORT
+using string_view = basic_string_view<char>;
+
+/** Specifies if ``T`` is a character type. Can be specialized by users. */
+FMT_MODULE_EXPORT
+template <typename T> struct is_char : std::false_type {};
+template <> struct is_char<char> : std::true_type {};
+
+namespace detail {
+
+// A base class for compile-time strings.
+struct compile_string {};
+
+template <typename S>
+struct is_compile_string : std::is_base_of<compile_string, S> {};
+
+template <typename Char, FMT_ENABLE_IF(is_char<Char>::value)>
+FMT_INLINE auto to_string_view(const Char* s) -> basic_string_view<Char> {
+ return s;
+}
+template <typename Char, typename Traits, typename Alloc>
+inline auto to_string_view(const std::basic_string<Char, Traits, Alloc>& s)
+ -> basic_string_view<Char> {
+ return s;
+}
+template <typename Char>
+constexpr auto to_string_view(basic_string_view<Char> s)
+ -> basic_string_view<Char> {
+ return s;
+}
+template <typename Char,
+ FMT_ENABLE_IF(!std::is_empty<std_string_view<Char>>::value)>
+inline auto to_string_view(std_string_view<Char> s) -> basic_string_view<Char> {
+ return s;
+}
+template <typename S, FMT_ENABLE_IF(is_compile_string<S>::value)>
+constexpr auto to_string_view(const S& s)
+ -> basic_string_view<typename S::char_type> {
+ return basic_string_view<typename S::char_type>(s);
+}
+void to_string_view(...);
+
+// Specifies whether S is a string type convertible to fmt::basic_string_view.
+// It should be a constexpr function but MSVC 2017 fails to compile it in
+// enable_if and MSVC 2015 fails to compile it as an alias template.
+// ADL is intentionally disabled as to_string_view is not an extension point.
+template <typename S>
+struct is_string
+ : std::is_class<decltype(detail::to_string_view(std::declval<S>()))> {};
+
+template <typename S, typename = void> struct char_t_impl {};
+template <typename S> struct char_t_impl<S, enable_if_t<is_string<S>::value>> {
+ using result = decltype(to_string_view(std::declval<S>()));
+ using type = typename result::value_type;
+};
+
+enum class type {
+ none_type,
+ // Integer types should go first,
+ int_type,
+ uint_type,
+ long_long_type,
+ ulong_long_type,
+ int128_type,
+ uint128_type,
+ bool_type,
+ char_type,
+ last_integer_type = char_type,
+ // followed by floating-point types.
+ float_type,
+ double_type,
+ long_double_type,
+ last_numeric_type = long_double_type,
+ cstring_type,
+ string_type,
+ pointer_type,
+ custom_type
+};
+
+// Maps core type T to the corresponding type enum constant.
+template <typename T, typename Char>
+struct type_constant : std::integral_constant<type, type::custom_type> {};
+
+#define FMT_TYPE_CONSTANT(Type, constant) \
+ template <typename Char> \
+ struct type_constant<Type, Char> \
+ : std::integral_constant<type, type::constant> {}
+
+FMT_TYPE_CONSTANT(int, int_type);
+FMT_TYPE_CONSTANT(unsigned, uint_type);
+FMT_TYPE_CONSTANT(long long, long_long_type);
+FMT_TYPE_CONSTANT(unsigned long long, ulong_long_type);
+FMT_TYPE_CONSTANT(int128_opt, int128_type);
+FMT_TYPE_CONSTANT(uint128_opt, uint128_type);
+FMT_TYPE_CONSTANT(bool, bool_type);
+FMT_TYPE_CONSTANT(Char, char_type);
+FMT_TYPE_CONSTANT(float, float_type);
+FMT_TYPE_CONSTANT(double, double_type);
+FMT_TYPE_CONSTANT(long double, long_double_type);
+FMT_TYPE_CONSTANT(const Char*, cstring_type);
+FMT_TYPE_CONSTANT(basic_string_view<Char>, string_type);
+FMT_TYPE_CONSTANT(const void*, pointer_type);
+
+constexpr bool is_integral_type(type t) {
+ return t > type::none_type && t <= type::last_integer_type;
+}
+constexpr bool is_arithmetic_type(type t) {
+ return t > type::none_type && t <= type::last_numeric_type;
+}
+
+constexpr auto set(type rhs) -> int { return 1 << static_cast<int>(rhs); }
+constexpr auto in(type t, int set) -> bool {
+ return ((set >> static_cast<int>(t)) & 1) != 0;
+}
+
+// Bitsets of types.
+enum {
+ sint_set =
+ set(type::int_type) | set(type::long_long_type) | set(type::int128_type),
+ uint_set = set(type::uint_type) | set(type::ulong_long_type) |
+ set(type::uint128_type),
+ bool_set = set(type::bool_type),
+ char_set = set(type::char_type),
+ float_set = set(type::float_type) | set(type::double_type) |
+ set(type::long_double_type),
+ string_set = set(type::string_type),
+ cstring_set = set(type::cstring_type),
+ pointer_set = set(type::pointer_type)
+};
+
+FMT_NORETURN FMT_API void throw_format_error(const char* message);
+
+struct error_handler {
+ constexpr error_handler() = default;
+
+ // This function is intentionally not constexpr to give a compile-time error.
+ FMT_NORETURN void on_error(const char* message) {
+ throw_format_error(message);
+ }
+};
+} // namespace detail
+
+/** String's character type. */
+template <typename S> using char_t = typename detail::char_t_impl<S>::type;
+
+/**
+ \rst
+ Parsing context consisting of a format string range being parsed and an
+ argument counter for automatic indexing.
+ You can use the ``format_parse_context`` type alias for ``char`` instead.
+ \endrst
+ */
+FMT_MODULE_EXPORT
+template <typename Char> class basic_format_parse_context {
+ private:
+ basic_string_view<Char> format_str_;
+ int next_arg_id_;
+
+ FMT_CONSTEXPR void do_check_arg_id(int id);
+
+ public:
+ using char_type = Char;
+ using iterator = const Char*;
+
+ explicit constexpr basic_format_parse_context(
+ basic_string_view<Char> format_str, int next_arg_id = 0)
+ : format_str_(format_str), next_arg_id_(next_arg_id) {}
+
+ /**
+ Returns an iterator to the beginning of the format string range being
+ parsed.
+ */
+ constexpr auto begin() const noexcept -> iterator {
+ return format_str_.begin();
+ }
+
+ /**
+ Returns an iterator past the end of the format string range being parsed.
+ */
+ constexpr auto end() const noexcept -> iterator { return format_str_.end(); }
+
+ /** Advances the begin iterator to ``it``. */
+ FMT_CONSTEXPR void advance_to(iterator it) {
+ format_str_.remove_prefix(detail::to_unsigned(it - begin()));
+ }
+
+ /**
+ Reports an error if using the manual argument indexing; otherwise returns
+ the next argument index and switches to the automatic indexing.
+ */
+ FMT_CONSTEXPR auto next_arg_id() -> int {
+ if (next_arg_id_ < 0) {
+ detail::throw_format_error(
+ "cannot switch from manual to automatic argument indexing");
+ return 0;
+ }
+ int id = next_arg_id_++;
+ do_check_arg_id(id);
+ return id;
+ }
+
+ /**
+ Reports an error if using the automatic argument indexing; otherwise
+ switches to the manual indexing.
+ */
+ FMT_CONSTEXPR void check_arg_id(int id) {
+ if (next_arg_id_ > 0) {
+ detail::throw_format_error(
+ "cannot switch from automatic to manual argument indexing");
+ return;
+ }
+ next_arg_id_ = -1;
+ do_check_arg_id(id);
+ }
+ FMT_CONSTEXPR void check_arg_id(basic_string_view<Char>) {}
+ FMT_CONSTEXPR void check_dynamic_spec(int arg_id);
+};
+
+FMT_MODULE_EXPORT
+using format_parse_context = basic_format_parse_context<char>;
+
+namespace detail {
+// A parse context with extra data used only in compile-time checks.
+template <typename Char>
+class compile_parse_context : public basic_format_parse_context<Char> {
+ private:
+ int num_args_;
+ const type* types_;
+ using base = basic_format_parse_context<Char>;
+
+ public:
+ explicit FMT_CONSTEXPR compile_parse_context(
+ basic_string_view<Char> format_str, int num_args, const type* types,
+ int next_arg_id = 0)
+ : base(format_str, next_arg_id), num_args_(num_args), types_(types) {}
+
+ constexpr auto num_args() const -> int { return num_args_; }
+ constexpr auto arg_type(int id) const -> type { return types_[id]; }
+
+ FMT_CONSTEXPR auto next_arg_id() -> int {
+ int id = base::next_arg_id();
+ if (id >= num_args_) throw_format_error("argument not found");
+ return id;
+ }
+
+ FMT_CONSTEXPR void check_arg_id(int id) {
+ base::check_arg_id(id);
+ if (id >= num_args_) throw_format_error("argument not found");
+ }
+ using base::check_arg_id;
+
+ FMT_CONSTEXPR void check_dynamic_spec(int arg_id) {
+ detail::ignore_unused(arg_id);
+#if !defined(__LCC__)
+ if (arg_id < num_args_ && types_ && !is_integral_type(types_[arg_id]))
+ throw_format_error("width/precision is not integer");
+#endif
+ }
+};
+} // namespace detail
+
+template <typename Char>
+FMT_CONSTEXPR void basic_format_parse_context<Char>::do_check_arg_id(int id) {
+ // Argument id is only checked at compile-time during parsing because
+ // formatting has its own validation.
+ if (detail::is_constant_evaluated() &&
+ (!FMT_GCC_VERSION || FMT_GCC_VERSION >= 1200)) {
+ using context = detail::compile_parse_context<Char>;
+ if (id >= static_cast<context*>(this)->num_args())
+ detail::throw_format_error("argument not found");
+ }
+}
+
+template <typename Char>
+FMT_CONSTEXPR void basic_format_parse_context<Char>::check_dynamic_spec(
+ int arg_id) {
+ if (detail::is_constant_evaluated() &&
+ (!FMT_GCC_VERSION || FMT_GCC_VERSION >= 1200)) {
+ using context = detail::compile_parse_context<Char>;
+ static_cast<context*>(this)->check_dynamic_spec(arg_id);
+ }
+}
+
+FMT_MODULE_EXPORT template <typename Context> class basic_format_arg;
+FMT_MODULE_EXPORT template <typename Context> class basic_format_args;
+FMT_MODULE_EXPORT template <typename Context> class dynamic_format_arg_store;
+
+// A formatter for objects of type T.
+FMT_MODULE_EXPORT
+template <typename T, typename Char = char, typename Enable = void>
+struct formatter {
+ // A deleted default constructor indicates a disabled formatter.
+ formatter() = delete;
+};
+
+// Specifies if T has an enabled formatter specialization. A type can be
+// formattable even if it doesn't have a formatter e.g. via a conversion.
+template <typename T, typename Context>
+using has_formatter =
+ std::is_constructible<typename Context::template formatter_type<T>>;
+
+// Checks whether T is a container with contiguous storage.
+template <typename T> struct is_contiguous : std::false_type {};
+template <typename Char>
+struct is_contiguous<std::basic_string<Char>> : std::true_type {};
+
+class appender;
+
+namespace detail {
+
+template <typename Context, typename T>
+constexpr auto has_const_formatter_impl(T*)
+ -> decltype(typename Context::template formatter_type<T>().format(
+ std::declval<const T&>(), std::declval<Context&>()),
+ true) {
+ return true;
+}
+template <typename Context>
+constexpr auto has_const_formatter_impl(...) -> bool {
+ return false;
+}
+template <typename T, typename Context>
+constexpr auto has_const_formatter() -> bool {
+ return has_const_formatter_impl<Context>(static_cast<T*>(nullptr));
+}
+
+// Extracts a reference to the container from back_insert_iterator.
+template <typename Container>
+inline auto get_container(std::back_insert_iterator<Container> it)
+ -> Container& {
+ using base = std::back_insert_iterator<Container>;
+ struct accessor : base {
+ accessor(base b) : base(b) {}
+ using base::container;
+ };
+ return *accessor(it).container;
+}
+
+template <typename Char, typename InputIt, typename OutputIt>
+FMT_CONSTEXPR auto copy_str(InputIt begin, InputIt end, OutputIt out)
+ -> OutputIt {
+ while (begin != end) *out++ = static_cast<Char>(*begin++);
+ return out;
+}
+
+template <typename Char, typename T, typename U,
+ FMT_ENABLE_IF(
+ std::is_same<remove_const_t<T>, U>::value&& is_char<U>::value)>
+FMT_CONSTEXPR auto copy_str(T* begin, T* end, U* out) -> U* {
+ if (is_constant_evaluated()) return copy_str<Char, T*, U*>(begin, end, out);
+ auto size = to_unsigned(end - begin);
+ if (size > 0) memcpy(out, begin, size * sizeof(U));
+ return out + size;
+}
+
+/**
+ \rst
+ A contiguous memory buffer with an optional growing ability. It is an internal
+ class and shouldn't be used directly, only via `~fmt::basic_memory_buffer`.
+ \endrst
+ */
+template <typename T> class buffer {
+ private:
+ T* ptr_;
+ size_t size_;
+ size_t capacity_;
+
+ protected:
+ // Don't initialize ptr_ since it is not accessed to save a few cycles.
+ FMT_MSC_WARNING(suppress : 26495)
+ buffer(size_t sz) noexcept : size_(sz), capacity_(sz) {}
+
+ FMT_CONSTEXPR20 buffer(T* p = nullptr, size_t sz = 0, size_t cap = 0) noexcept
+ : ptr_(p), size_(sz), capacity_(cap) {}
+
+ FMT_CONSTEXPR20 ~buffer() = default;
+ buffer(buffer&&) = default;
+
+ /** Sets the buffer data and capacity. */
+ FMT_CONSTEXPR void set(T* buf_data, size_t buf_capacity) noexcept {
+ ptr_ = buf_data;
+ capacity_ = buf_capacity;
+ }
+
+ /** Increases the buffer capacity to hold at least *capacity* elements. */
+ virtual FMT_CONSTEXPR20 void grow(size_t capacity) = 0;
+
+ public:
+ using value_type = T;
+ using const_reference = const T&;
+
+ buffer(const buffer&) = delete;
+ void operator=(const buffer&) = delete;
+
+ FMT_INLINE auto begin() noexcept -> T* { return ptr_; }
+ FMT_INLINE auto end() noexcept -> T* { return ptr_ + size_; }
+
+ FMT_INLINE auto begin() const noexcept -> const T* { return ptr_; }
+ FMT_INLINE auto end() const noexcept -> const T* { return ptr_ + size_; }
+
+ /** Returns the size of this buffer. */
+ constexpr auto size() const noexcept -> size_t { return size_; }
+
+ /** Returns the capacity of this buffer. */
+ constexpr auto capacity() const noexcept -> size_t { return capacity_; }
+
+ /** Returns a pointer to the buffer data. */
+ FMT_CONSTEXPR auto data() noexcept -> T* { return ptr_; }
+
+ /** Returns a pointer to the buffer data. */
+ FMT_CONSTEXPR auto data() const noexcept -> const T* { return ptr_; }
+
+ /** Clears this buffer. */
+ void clear() { size_ = 0; }
+
+ // Tries resizing the buffer to contain *count* elements. If T is a POD type
+ // the new elements may not be initialized.
+ FMT_CONSTEXPR20 void try_resize(size_t count) {
+ try_reserve(count);
+ size_ = count <= capacity_ ? count : capacity_;
+ }
+
+ // Tries increasing the buffer capacity to *new_capacity*. It can increase the
+ // capacity by a smaller amount than requested but guarantees there is space
+ // for at least one additional element either by increasing the capacity or by
+ // flushing the buffer if it is full.
+ FMT_CONSTEXPR20 void try_reserve(size_t new_capacity) {
+ if (new_capacity > capacity_) grow(new_capacity);
+ }
+
+ FMT_CONSTEXPR20 void push_back(const T& value) {
+ try_reserve(size_ + 1);
+ ptr_[size_++] = value;
+ }
+
+ /** Appends data to the end of the buffer. */
+ template <typename U> void append(const U* begin, const U* end);
+
+ template <typename Idx> FMT_CONSTEXPR auto operator[](Idx index) -> T& {
+ return ptr_[index];
+ }
+ template <typename Idx>
+ FMT_CONSTEXPR auto operator[](Idx index) const -> const T& {
+ return ptr_[index];
+ }
+};
+
+struct buffer_traits {
+ explicit buffer_traits(size_t) {}
+ auto count() const -> size_t { return 0; }
+ auto limit(size_t size) -> size_t { return size; }
+};
+
+class fixed_buffer_traits {
+ private:
+ size_t count_ = 0;
+ size_t limit_;
+
+ public:
+ explicit fixed_buffer_traits(size_t limit) : limit_(limit) {}
+ auto count() const -> size_t { return count_; }
+ auto limit(size_t size) -> size_t {
+ size_t n = limit_ > count_ ? limit_ - count_ : 0;
+ count_ += size;
+ return size < n ? size : n;
+ }
+};
+
+// A buffer that writes to an output iterator when flushed.
+template <typename OutputIt, typename T, typename Traits = buffer_traits>
+class iterator_buffer final : public Traits, public buffer<T> {
+ private:
+ OutputIt out_;
+ enum { buffer_size = 256 };
+ T data_[buffer_size];
+
+ protected:
+ FMT_CONSTEXPR20 void grow(size_t) override {
+ if (this->size() == buffer_size) flush();
+ }
+
+ void flush() {
+ auto size = this->size();
+ this->clear();
+ out_ = copy_str<T>(data_, data_ + this->limit(size), out_);
+ }
+
+ public:
+ explicit iterator_buffer(OutputIt out, size_t n = buffer_size)
+ : Traits(n), buffer<T>(data_, 0, buffer_size), out_(out) {}
+ iterator_buffer(iterator_buffer&& other)
+ : Traits(other), buffer<T>(data_, 0, buffer_size), out_(other.out_) {}
+ ~iterator_buffer() { flush(); }
+
+ auto out() -> OutputIt {
+ flush();
+ return out_;
+ }
+ auto count() const -> size_t { return Traits::count() + this->size(); }
+};
+
+template <typename T>
+class iterator_buffer<T*, T, fixed_buffer_traits> final
+ : public fixed_buffer_traits,
+ public buffer<T> {
+ private:
+ T* out_;
+ enum { buffer_size = 256 };
+ T data_[buffer_size];
+
+ protected:
+ FMT_CONSTEXPR20 void grow(size_t) override {
+ if (this->size() == this->capacity()) flush();
+ }
+
+ void flush() {
+ size_t n = this->limit(this->size());
+ if (this->data() == out_) {
+ out_ += n;
+ this->set(data_, buffer_size);
+ }
+ this->clear();
+ }
+
+ public:
+ explicit iterator_buffer(T* out, size_t n = buffer_size)
+ : fixed_buffer_traits(n), buffer<T>(out, 0, n), out_(out) {}
+ iterator_buffer(iterator_buffer&& other)
+ : fixed_buffer_traits(other),
+ buffer<T>(std::move(other)),
+ out_(other.out_) {
+ if (this->data() != out_) {
+ this->set(data_, buffer_size);
+ this->clear();
+ }
+ }
+ ~iterator_buffer() { flush(); }
+
+ auto out() -> T* {
+ flush();
+ return out_;
+ }
+ auto count() const -> size_t {
+ return fixed_buffer_traits::count() + this->size();
+ }
+};
+
+template <typename T> class iterator_buffer<T*, T> final : public buffer<T> {
+ protected:
+ FMT_CONSTEXPR20 void grow(size_t) override {}
+
+ public:
+ explicit iterator_buffer(T* out, size_t = 0) : buffer<T>(out, 0, ~size_t()) {}
+
+ auto out() -> T* { return &*this->end(); }
+};
+
+// A buffer that writes to a container with the contiguous storage.
+template <typename Container>
+class iterator_buffer<std::back_insert_iterator<Container>,
+ enable_if_t<is_contiguous<Container>::value,
+ typename Container::value_type>>
+ final : public buffer<typename Container::value_type> {
+ private:
+ Container& container_;
+
+ protected:
+ FMT_CONSTEXPR20 void grow(size_t capacity) override {
+ container_.resize(capacity);
+ this->set(&container_[0], capacity);
+ }
+
+ public:
+ explicit iterator_buffer(Container& c)
+ : buffer<typename Container::value_type>(c.size()), container_(c) {}
+ explicit iterator_buffer(std::back_insert_iterator<Container> out, size_t = 0)
+ : iterator_buffer(get_container(out)) {}
+
+ auto out() -> std::back_insert_iterator<Container> {
+ return std::back_inserter(container_);
+ }
+};
+
+// A buffer that counts the number of code units written discarding the output.
+template <typename T = char> class counting_buffer final : public buffer<T> {
+ private:
+ enum { buffer_size = 256 };
+ T data_[buffer_size];
+ size_t count_ = 0;
+
+ protected:
+ FMT_CONSTEXPR20 void grow(size_t) override {
+ if (this->size() != buffer_size) return;
+ count_ += this->size();
+ this->clear();
+ }
+
+ public:
+ counting_buffer() : buffer<T>(data_, 0, buffer_size) {}
+
+ auto count() -> size_t { return count_ + this->size(); }
+};
+
+template <typename T>
+using buffer_appender = conditional_t<std::is_same<T, char>::value, appender,
+ std::back_insert_iterator<buffer<T>>>;
+
+// Maps an output iterator to a buffer.
+template <typename T, typename OutputIt>
+auto get_buffer(OutputIt out) -> iterator_buffer<OutputIt, T> {
+ return iterator_buffer<OutputIt, T>(out);
+}
+template <typename T, typename Buf,
+ FMT_ENABLE_IF(std::is_base_of<buffer<char>, Buf>::value)>
+auto get_buffer(std::back_insert_iterator<Buf> out) -> buffer<char>& {
+ return get_container(out);
+}
+
+template <typename Buf, typename OutputIt>
+FMT_INLINE auto get_iterator(Buf& buf, OutputIt) -> decltype(buf.out()) {
+ return buf.out();
+}
+template <typename T, typename OutputIt>
+auto get_iterator(buffer<T>&, OutputIt out) -> OutputIt {
+ return out;
+}
+
+struct view {};
+
+template <typename Char, typename T> struct named_arg : view {
+ const Char* name;
+ const T& value;
+ named_arg(const Char* n, const T& v) : name(n), value(v) {}
+};
+
+template <typename Char> struct named_arg_info {
+ const Char* name;
+ int id;
+};
+
+template <typename T, typename Char, size_t NUM_ARGS, size_t NUM_NAMED_ARGS>
+struct arg_data {
+ // args_[0].named_args points to named_args_ to avoid bloating format_args.
+ // +1 to workaround a bug in gcc 7.5 that causes duplicated-branches warning.
+ T args_[1 + (NUM_ARGS != 0 ? NUM_ARGS : +1)];
+ named_arg_info<Char> named_args_[NUM_NAMED_ARGS];
+
+ template <typename... U>
+ arg_data(const U&... init) : args_{T(named_args_, NUM_NAMED_ARGS), init...} {}
+ arg_data(const arg_data& other) = delete;
+ auto args() const -> const T* { return args_ + 1; }
+ auto named_args() -> named_arg_info<Char>* { return named_args_; }
+};
+
+template <typename T, typename Char, size_t NUM_ARGS>
+struct arg_data<T, Char, NUM_ARGS, 0> {
+ // +1 to workaround a bug in gcc 7.5 that causes duplicated-branches warning.
+ T args_[NUM_ARGS != 0 ? NUM_ARGS : +1];
+
+ template <typename... U>
+ FMT_CONSTEXPR FMT_INLINE arg_data(const U&... init) : args_{init...} {}
+ FMT_CONSTEXPR FMT_INLINE auto args() const -> const T* { return args_; }
+ FMT_CONSTEXPR FMT_INLINE auto named_args() -> std::nullptr_t {
+ return nullptr;
+ }
+};
+
+template <typename Char>
+inline void init_named_args(named_arg_info<Char>*, int, int) {}
+
+template <typename T> struct is_named_arg : std::false_type {};
+template <typename T> struct is_statically_named_arg : std::false_type {};
+
+template <typename T, typename Char>
+struct is_named_arg<named_arg<Char, T>> : std::true_type {};
+
+template <typename Char, typename T, typename... Tail,
+ FMT_ENABLE_IF(!is_named_arg<T>::value)>
+void init_named_args(named_arg_info<Char>* named_args, int arg_count,
+ int named_arg_count, const T&, const Tail&... args) {
+ init_named_args(named_args, arg_count + 1, named_arg_count, args...);
+}
+
+template <typename Char, typename T, typename... Tail,
+ FMT_ENABLE_IF(is_named_arg<T>::value)>
+void init_named_args(named_arg_info<Char>* named_args, int arg_count,
+ int named_arg_count, const T& arg, const Tail&... args) {
+ named_args[named_arg_count++] = {arg.name, arg_count};
+ init_named_args(named_args, arg_count + 1, named_arg_count, args...);
+}
+
+template <typename... Args>
+FMT_CONSTEXPR FMT_INLINE void init_named_args(std::nullptr_t, int, int,
+ const Args&...) {}
+
+template <bool B = false> constexpr auto count() -> size_t { return B ? 1 : 0; }
+template <bool B1, bool B2, bool... Tail> constexpr auto count() -> size_t {
+ return (B1 ? 1 : 0) + count<B2, Tail...>();
+}
+
+template <typename... Args> constexpr auto count_named_args() -> size_t {
+ return count<is_named_arg<Args>::value...>();
+}
+
+template <typename... Args>
+constexpr auto count_statically_named_args() -> size_t {
+ return count<is_statically_named_arg<Args>::value...>();
+}
+
+struct unformattable {};
+struct unformattable_char : unformattable {};
+struct unformattable_pointer : unformattable {};
+
+template <typename Char> struct string_value {
+ const Char* data;
+ size_t size;
+};
+
+template <typename Char> struct named_arg_value {
+ const named_arg_info<Char>* data;
+ size_t size;
+};
+
+template <typename Context> struct custom_value {
+ using parse_context = typename Context::parse_context_type;
+ void* value;
+ void (*format)(void* arg, parse_context& parse_ctx, Context& ctx);
+};
+
+// A formatting argument value.
+template <typename Context> class value {
+ public:
+ using char_type = typename Context::char_type;
+
+ union {
+ monostate no_value;
+ int int_value;
+ unsigned uint_value;
+ long long long_long_value;
+ unsigned long long ulong_long_value;
+ int128_opt int128_value;
+ uint128_opt uint128_value;
+ bool bool_value;
+ char_type char_value;
+ float float_value;
+ double double_value;
+ long double long_double_value;
+ const void* pointer;
+ string_value<char_type> string;
+ custom_value<Context> custom;
+ named_arg_value<char_type> named_args;
+ };
+
+ constexpr FMT_INLINE value() : no_value() {}
+ constexpr FMT_INLINE value(int val) : int_value(val) {}
+ constexpr FMT_INLINE value(unsigned val) : uint_value(val) {}
+ constexpr FMT_INLINE value(long long val) : long_long_value(val) {}
+ constexpr FMT_INLINE value(unsigned long long val) : ulong_long_value(val) {}
+ FMT_INLINE value(int128_opt val) : int128_value(val) {}
+ FMT_INLINE value(uint128_opt val) : uint128_value(val) {}
+ constexpr FMT_INLINE value(float val) : float_value(val) {}
+ constexpr FMT_INLINE value(double val) : double_value(val) {}
+ FMT_INLINE value(long double val) : long_double_value(val) {}
+ constexpr FMT_INLINE value(bool val) : bool_value(val) {}
+ constexpr FMT_INLINE value(char_type val) : char_value(val) {}
+ FMT_CONSTEXPR FMT_INLINE value(const char_type* val) {
+ string.data = val;
+ if (is_constant_evaluated()) string.size = {};
+ }
+ FMT_CONSTEXPR FMT_INLINE value(basic_string_view<char_type> val) {
+ string.data = val.data();
+ string.size = val.size();
+ }
+ FMT_INLINE value(const void* val) : pointer(val) {}
+ FMT_INLINE value(const named_arg_info<char_type>* args, size_t size)
+ : named_args{args, size} {}
+
+ template <typename T> FMT_CONSTEXPR FMT_INLINE value(T& val) {
+ using value_type = remove_cvref_t<T>;
+ custom.value = const_cast<value_type*>(&val);
+ // Get the formatter type through the context to allow different contexts
+ // have different extension points, e.g. `formatter<T>` for `format` and
+ // `printf_formatter<T>` for `printf`.
+ custom.format = format_custom_arg<
+ value_type, typename Context::template formatter_type<value_type>>;
+ }
+ value(unformattable);
+ value(unformattable_char);
+ value(unformattable_pointer);
+
+ private:
+ // Formats an argument of a custom type, such as a user-defined class.
+ template <typename T, typename Formatter>
+ static void format_custom_arg(void* arg,
+ typename Context::parse_context_type& parse_ctx,
+ Context& ctx) {
+ auto f = Formatter();
+ parse_ctx.advance_to(f.parse(parse_ctx));
+ using qualified_type =
+ conditional_t<has_const_formatter<T, Context>(), const T, T>;
+ ctx.advance_to(f.format(*static_cast<qualified_type*>(arg), ctx));
+ }
+};
+
+template <typename Context, typename T>
+FMT_CONSTEXPR auto make_arg(T&& value) -> basic_format_arg<Context>;
+
+// To minimize the number of types we need to deal with, long is translated
+// either to int or to long long depending on its size.
+enum { long_short = sizeof(long) == sizeof(int) };
+using long_type = conditional_t<long_short, int, long long>;
+using ulong_type = conditional_t<long_short, unsigned, unsigned long long>;
+
+template <typename T> struct format_as_result {
+ template <typename U,
+ FMT_ENABLE_IF(std::is_enum<U>::value || std::is_class<U>::value)>
+ static auto map(U*) -> decltype(format_as(std::declval<U>()));
+ static auto map(...) -> void;
+
+ using type = decltype(map(static_cast<T*>(nullptr)));
+};
+template <typename T> using format_as_t = typename format_as_result<T>::type;
+
+template <typename T>
+struct has_format_as
+ : bool_constant<!std::is_same<format_as_t<T>, void>::value> {};
+
+// Maps formatting arguments to core types.
+// arg_mapper reports errors by returning unformattable instead of using
+// static_assert because it's used in the is_formattable trait.
+template <typename Context> struct arg_mapper {
+ using char_type = typename Context::char_type;
+
+ FMT_CONSTEXPR FMT_INLINE auto map(signed char val) -> int { return val; }
+ FMT_CONSTEXPR FMT_INLINE auto map(unsigned char val) -> unsigned {
+ return val;
+ }
+ FMT_CONSTEXPR FMT_INLINE auto map(short val) -> int { return val; }
+ FMT_CONSTEXPR FMT_INLINE auto map(unsigned short val) -> unsigned {
+ return val;
+ }
+ FMT_CONSTEXPR FMT_INLINE auto map(int val) -> int { return val; }
+ FMT_CONSTEXPR FMT_INLINE auto map(unsigned val) -> unsigned { return val; }
+ FMT_CONSTEXPR FMT_INLINE auto map(long val) -> long_type { return val; }
+ FMT_CONSTEXPR FMT_INLINE auto map(unsigned long val) -> ulong_type {
+ return val;
+ }
+ FMT_CONSTEXPR FMT_INLINE auto map(long long val) -> long long { return val; }
+ FMT_CONSTEXPR FMT_INLINE auto map(unsigned long long val)
+ -> unsigned long long {
+ return val;
+ }
+ FMT_CONSTEXPR FMT_INLINE auto map(int128_opt val) -> int128_opt {
+ return val;
+ }
+ FMT_CONSTEXPR FMT_INLINE auto map(uint128_opt val) -> uint128_opt {
+ return val;
+ }
+ FMT_CONSTEXPR FMT_INLINE auto map(bool val) -> bool { return val; }
+
+ template <typename T, FMT_ENABLE_IF(std::is_same<T, char>::value ||
+ std::is_same<T, char_type>::value)>
+ FMT_CONSTEXPR FMT_INLINE auto map(T val) -> char_type {
+ return val;
+ }
+ template <typename T, enable_if_t<(std::is_same<T, wchar_t>::value ||
+#ifdef __cpp_char8_t
+ std::is_same<T, char8_t>::value ||
+#endif
+ std::is_same<T, char16_t>::value ||
+ std::is_same<T, char32_t>::value) &&
+ !std::is_same<T, char_type>::value,
+ int> = 0>
+ FMT_CONSTEXPR FMT_INLINE auto map(T) -> unformattable_char {
+ return {};
+ }
+
+ FMT_CONSTEXPR FMT_INLINE auto map(float val) -> float { return val; }
+ FMT_CONSTEXPR FMT_INLINE auto map(double val) -> double { return val; }
+ FMT_CONSTEXPR FMT_INLINE auto map(long double val) -> long double {
+ return val;
+ }
+
+ FMT_CONSTEXPR FMT_INLINE auto map(char_type* val) -> const char_type* {
+ return val;
+ }
+ FMT_CONSTEXPR FMT_INLINE auto map(const char_type* val) -> const char_type* {
+ return val;
+ }
+ template <typename T,
+ FMT_ENABLE_IF(is_string<T>::value && !std::is_pointer<T>::value &&
+ std::is_same<char_type, char_t<T>>::value)>
+ FMT_CONSTEXPR FMT_INLINE auto map(const T& val)
+ -> basic_string_view<char_type> {
+ return to_string_view(val);
+ }
+ template <typename T,
+ FMT_ENABLE_IF(is_string<T>::value && !std::is_pointer<T>::value &&
+ !std::is_same<char_type, char_t<T>>::value)>
+ FMT_CONSTEXPR FMT_INLINE auto map(const T&) -> unformattable_char {
+ return {};
+ }
+
+ FMT_CONSTEXPR FMT_INLINE auto map(void* val) -> const void* { return val; }
+ FMT_CONSTEXPR FMT_INLINE auto map(const void* val) -> const void* {
+ return val;
+ }
+ FMT_CONSTEXPR FMT_INLINE auto map(std::nullptr_t val) -> const void* {
+ return val;
+ }
+
+ // Use SFINAE instead of a const T* parameter to avoid a conflict with the
+ // array overload.
+ template <
+ typename T,
+ FMT_ENABLE_IF(
+ std::is_pointer<T>::value || std::is_member_pointer<T>::value ||
+ std::is_function<typename std::remove_pointer<T>::type>::value ||
+ (std::is_convertible<const T&, const void*>::value &&
+ !std::is_convertible<const T&, const char_type*>::value &&
+ !has_formatter<T, Context>::value))>
+ FMT_CONSTEXPR auto map(const T&) -> unformattable_pointer {
+ return {};
+ }
+
+ template <typename T, std::size_t N,
+ FMT_ENABLE_IF(!std::is_same<T, wchar_t>::value)>
+ FMT_CONSTEXPR FMT_INLINE auto map(const T (&values)[N]) -> const T (&)[N] {
+ return values;
+ }
+
+ // Only map owning types because mapping views can be unsafe.
+ template <typename T, typename U = format_as_t<T>,
+ FMT_ENABLE_IF(std::is_arithmetic<U>::value)>
+ FMT_CONSTEXPR FMT_INLINE auto map(const T& val) -> decltype(this->map(U())) {
+ return map(format_as(val));
+ }
+
+ template <typename T, typename U = remove_cvref_t<T>>
+ struct formattable
+ : bool_constant<has_const_formatter<U, Context>() ||
+ (has_formatter<U, Context>::value &&
+ !std::is_const<remove_reference_t<T>>::value)> {};
+
+ template <typename T, FMT_ENABLE_IF(formattable<T>::value)>
+ FMT_CONSTEXPR FMT_INLINE auto do_map(T&& val) -> T& {
+ return val;
+ }
+ template <typename T, FMT_ENABLE_IF(!formattable<T>::value)>
+ FMT_CONSTEXPR FMT_INLINE auto do_map(T&&) -> unformattable {
+ return {};
+ }
+
+ template <typename T, typename U = remove_cvref_t<T>,
+ FMT_ENABLE_IF((std::is_class<U>::value || std::is_enum<U>::value ||
+ std::is_union<U>::value) &&
+ !is_string<U>::value && !is_char<U>::value &&
+ !is_named_arg<U>::value &&
+ !std::is_arithmetic<format_as_t<U>>::value)>
+ FMT_CONSTEXPR FMT_INLINE auto map(T&& val)
+ -> decltype(this->do_map(std::forward<T>(val))) {
+ return do_map(std::forward<T>(val));
+ }
+
+ template <typename T, FMT_ENABLE_IF(is_named_arg<T>::value)>
+ FMT_CONSTEXPR FMT_INLINE auto map(const T& named_arg)
+ -> decltype(this->map(named_arg.value)) {
+ return map(named_arg.value);
+ }
+
+ auto map(...) -> unformattable { return {}; }
+};
+
+// A type constant after applying arg_mapper<Context>.
+template <typename T, typename Context>
+using mapped_type_constant =
+ type_constant<decltype(arg_mapper<Context>().map(std::declval<const T&>())),
+ typename Context::char_type>;
+
+enum { packed_arg_bits = 4 };
+// Maximum number of arguments with packed types.
+enum { max_packed_args = 62 / packed_arg_bits };
+enum : unsigned long long { is_unpacked_bit = 1ULL << 63 };
+enum : unsigned long long { has_named_args_bit = 1ULL << 62 };
+} // namespace detail
+
+// An output iterator that appends to a buffer.
+// It is used to reduce symbol sizes for the common case.
+class appender : public std::back_insert_iterator<detail::buffer<char>> {
+ using base = std::back_insert_iterator<detail::buffer<char>>;
+
+ public:
+ using std::back_insert_iterator<detail::buffer<char>>::back_insert_iterator;
+ appender(base it) noexcept : base(it) {}
+ FMT_UNCHECKED_ITERATOR(appender);
+
+ auto operator++() noexcept -> appender& { return *this; }
+ auto operator++(int) noexcept -> appender { return *this; }
+};
+
+// A formatting argument. It is a trivially copyable/constructible type to
+// allow storage in basic_memory_buffer.
+template <typename Context> class basic_format_arg {
+ private:
+ detail::value<Context> value_;
+ detail::type type_;
+
+ template <typename ContextType, typename T>
+ friend FMT_CONSTEXPR auto detail::make_arg(T&& value)
+ -> basic_format_arg<ContextType>;
+
+ template <typename Visitor, typename Ctx>
+ friend FMT_CONSTEXPR auto visit_format_arg(Visitor&& vis,
+ const basic_format_arg<Ctx>& arg)
+ -> decltype(vis(0));
+
+ friend class basic_format_args<Context>;
+ friend class dynamic_format_arg_store<Context>;
+
+ using char_type = typename Context::char_type;
+
+ template <typename T, typename Char, size_t NUM_ARGS, size_t NUM_NAMED_ARGS>
+ friend struct detail::arg_data;
+
+ basic_format_arg(const detail::named_arg_info<char_type>* args, size_t size)
+ : value_(args, size) {}
+
+ public:
+ class handle {
+ public:
+ explicit handle(detail::custom_value<Context> custom) : custom_(custom) {}
+
+ void format(typename Context::parse_context_type& parse_ctx,
+ Context& ctx) const {
+ custom_.format(custom_.value, parse_ctx, ctx);
+ }
+
+ private:
+ detail::custom_value<Context> custom_;
+ };
+
+ constexpr basic_format_arg() : type_(detail::type::none_type) {}
+
+ constexpr explicit operator bool() const noexcept {
+ return type_ != detail::type::none_type;
+ }
+
+ auto type() const -> detail::type { return type_; }
+
+ auto is_integral() const -> bool { return detail::is_integral_type(type_); }
+ auto is_arithmetic() const -> bool {
+ return detail::is_arithmetic_type(type_);
+ }
+};
+
+/**
+ \rst
+ Visits an argument dispatching to the appropriate visit method based on
+ the argument type. For example, if the argument type is ``double`` then
+ ``vis(value)`` will be called with the value of type ``double``.
+ \endrst
+ */
+FMT_MODULE_EXPORT
+template <typename Visitor, typename Context>
+FMT_CONSTEXPR FMT_INLINE auto visit_format_arg(
+ Visitor&& vis, const basic_format_arg<Context>& arg) -> decltype(vis(0)) {
+ switch (arg.type_) {
+ case detail::type::none_type:
+ break;
+ case detail::type::int_type:
+ return vis(arg.value_.int_value);
+ case detail::type::uint_type:
+ return vis(arg.value_.uint_value);
+ case detail::type::long_long_type:
+ return vis(arg.value_.long_long_value);
+ case detail::type::ulong_long_type:
+ return vis(arg.value_.ulong_long_value);
+ case detail::type::int128_type:
+ return vis(detail::convert_for_visit(arg.value_.int128_value));
+ case detail::type::uint128_type:
+ return vis(detail::convert_for_visit(arg.value_.uint128_value));
+ case detail::type::bool_type:
+ return vis(arg.value_.bool_value);
+ case detail::type::char_type:
+ return vis(arg.value_.char_value);
+ case detail::type::float_type:
+ return vis(arg.value_.float_value);
+ case detail::type::double_type:
+ return vis(arg.value_.double_value);
+ case detail::type::long_double_type:
+ return vis(arg.value_.long_double_value);
+ case detail::type::cstring_type:
+ return vis(arg.value_.string.data);
+ case detail::type::string_type:
+ using sv = basic_string_view<typename Context::char_type>;
+ return vis(sv(arg.value_.string.data, arg.value_.string.size));
+ case detail::type::pointer_type:
+ return vis(arg.value_.pointer);
+ case detail::type::custom_type:
+ return vis(typename basic_format_arg<Context>::handle(arg.value_.custom));
+ }
+ return vis(monostate());
+}
+
+namespace detail {
+
+template <typename Char, typename InputIt>
+auto copy_str(InputIt begin, InputIt end, appender out) -> appender {
+ get_container(out).append(begin, end);
+ return out;
+}
+
+template <typename Char, typename R, typename OutputIt>
+FMT_CONSTEXPR auto copy_str(R&& rng, OutputIt out) -> OutputIt {
+ return detail::copy_str<Char>(rng.begin(), rng.end(), out);
+}
+
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 500
+// A workaround for gcc 4.8 to make void_t work in a SFINAE context.
+template <typename...> struct void_t_impl { using type = void; };
+template <typename... T> using void_t = typename void_t_impl<T...>::type;
+#else
+template <typename...> using void_t = void;
+#endif
+
+template <typename It, typename T, typename Enable = void>
+struct is_output_iterator : std::false_type {};
+
+template <typename It, typename T>
+struct is_output_iterator<
+ It, T,
+ void_t<typename std::iterator_traits<It>::iterator_category,
+ decltype(*std::declval<It>() = std::declval<T>())>>
+ : std::true_type {};
+
+template <typename It> struct is_back_insert_iterator : std::false_type {};
+template <typename Container>
+struct is_back_insert_iterator<std::back_insert_iterator<Container>>
+ : std::true_type {};
+
+template <typename It>
+struct is_contiguous_back_insert_iterator : std::false_type {};
+template <typename Container>
+struct is_contiguous_back_insert_iterator<std::back_insert_iterator<Container>>
+ : is_contiguous<Container> {};
+template <>
+struct is_contiguous_back_insert_iterator<appender> : std::true_type {};
+
+// A type-erased reference to an std::locale to avoid a heavy <locale> include.
+class locale_ref {
+ private:
+ const void* locale_; // A type-erased pointer to std::locale.
+
+ public:
+ constexpr FMT_INLINE locale_ref() : locale_(nullptr) {}
+ template <typename Locale> explicit locale_ref(const Locale& loc);
+
+ explicit operator bool() const noexcept { return locale_ != nullptr; }
+
+ template <typename Locale> auto get() const -> Locale;
+};
+
+template <typename> constexpr auto encode_types() -> unsigned long long {
+ return 0;
+}
+
+template <typename Context, typename Arg, typename... Args>
+constexpr auto encode_types() -> unsigned long long {
+ return static_cast<unsigned>(mapped_type_constant<Arg, Context>::value) |
+ (encode_types<Context, Args...>() << packed_arg_bits);
+}
+
+template <typename Context, typename T>
+FMT_CONSTEXPR FMT_INLINE auto make_value(T&& val) -> value<Context> {
+ auto&& arg = arg_mapper<Context>().map(FMT_FORWARD(val));
+ using arg_type = remove_cvref_t<decltype(arg)>;
+
+ constexpr bool formattable_char =
+ !std::is_same<arg_type, unformattable_char>::value;
+ static_assert(formattable_char, "Mixing character types is disallowed.");
+
+ // Formatting of arbitrary pointers is disallowed. If you want to format a
+ // pointer cast it to `void*` or `const void*`. In particular, this forbids
+ // formatting of `[const] volatile char*` printed as bool by iostreams.
+ constexpr bool formattable_pointer =
+ !std::is_same<arg_type, unformattable_pointer>::value;
+ static_assert(formattable_pointer,
+ "Formatting of non-void pointers is disallowed.");
+
+ constexpr bool formattable = !std::is_same<arg_type, unformattable>::value;
+ static_assert(
+ formattable,
+ "Cannot format an argument. To make type T formattable provide a "
+ "formatter<T> specialization: https://fmt.dev/latest/api.html#udt");
+ return {arg};
+}
+
+template <typename Context, typename T>
+FMT_CONSTEXPR auto make_arg(T&& value) -> basic_format_arg<Context> {
+ auto arg = basic_format_arg<Context>();
+ arg.type_ = mapped_type_constant<T, Context>::value;
+ arg.value_ = make_value<Context>(value);
+ return arg;
+}
+
+// The DEPRECATED type template parameter is there to avoid an ODR violation
+// when using a fallback formatter in one translation unit and an implicit
+// conversion in another (not recommended).
+template <bool IS_PACKED, typename Context, type, typename T,
+ FMT_ENABLE_IF(IS_PACKED)>
+FMT_CONSTEXPR FMT_INLINE auto make_arg(T&& val) -> value<Context> {
+ return make_value<Context>(val);
+}
+
+template <bool IS_PACKED, typename Context, type, typename T,
+ FMT_ENABLE_IF(!IS_PACKED)>
+FMT_CONSTEXPR inline auto make_arg(T&& value) -> basic_format_arg<Context> {
+ return make_arg<Context>(value);
+}
+} // namespace detail
+FMT_BEGIN_EXPORT
+
+// Formatting context.
+template <typename OutputIt, typename Char> class basic_format_context {
+ private:
+ OutputIt out_;
+ basic_format_args<basic_format_context> args_;
+ detail::locale_ref loc_;
+
+ public:
+ using iterator = OutputIt;
+ using format_arg = basic_format_arg<basic_format_context>;
+ using format_args = basic_format_args<basic_format_context>;
+ using parse_context_type = basic_format_parse_context<Char>;
+ template <typename T> using formatter_type = formatter<T, Char>;
+
+ /** The character type for the output. */
+ using char_type = Char;
+
+ basic_format_context(basic_format_context&&) = default;
+ basic_format_context(const basic_format_context&) = delete;
+ void operator=(const basic_format_context&) = delete;
+ /**
+ Constructs a ``basic_format_context`` object. References to the arguments
+ are stored in the object so make sure they have appropriate lifetimes.
+ */
+ constexpr basic_format_context(OutputIt out, format_args ctx_args,
+ detail::locale_ref loc = {})
+ : out_(out), args_(ctx_args), loc_(loc) {}
+
+ constexpr auto arg(int id) const -> format_arg { return args_.get(id); }
+ FMT_CONSTEXPR auto arg(basic_string_view<Char> name) -> format_arg {
+ return args_.get(name);
+ }
+ FMT_CONSTEXPR auto arg_id(basic_string_view<Char> name) -> int {
+ return args_.get_id(name);
+ }
+ auto args() const -> const format_args& { return args_; }
+
+ FMT_CONSTEXPR auto error_handler() -> detail::error_handler { return {}; }
+ void on_error(const char* message) { error_handler().on_error(message); }
+
+ // Returns an iterator to the beginning of the output range.
+ FMT_CONSTEXPR auto out() -> iterator { return out_; }
+
+ // Advances the begin iterator to ``it``.
+ void advance_to(iterator it) {
+ if (!detail::is_back_insert_iterator<iterator>()) out_ = it;
+ }
+
+ FMT_CONSTEXPR auto locale() -> detail::locale_ref { return loc_; }
+};
+
+template <typename Char>
+using buffer_context =
+ basic_format_context<detail::buffer_appender<Char>, Char>;
+using format_context = buffer_context<char>;
+
+template <typename T, typename Char = char>
+using is_formattable = bool_constant<!std::is_base_of<
+ detail::unformattable, decltype(detail::arg_mapper<buffer_context<Char>>()
+ .map(std::declval<T>()))>::value>;
+
+/**
+ \rst
+ An array of references to arguments. It can be implicitly converted into
+ `~fmt::basic_format_args` for passing into type-erased formatting functions
+ such as `~fmt::vformat`.
+ \endrst
+ */
+template <typename Context, typename... Args>
+class format_arg_store
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
+ // Workaround a GCC template argument substitution bug.
+ : public basic_format_args<Context>
+#endif
+{
+ private:
+ static const size_t num_args = sizeof...(Args);
+ static const size_t num_named_args = detail::count_named_args<Args...>();
+ static const bool is_packed = num_args <= detail::max_packed_args;
+
+ using value_type = conditional_t<is_packed, detail::value<Context>,
+ basic_format_arg<Context>>;
+
+ detail::arg_data<value_type, typename Context::char_type, num_args,
+ num_named_args>
+ data_;
+
+ friend class basic_format_args<Context>;
+
+ static constexpr unsigned long long desc =
+ (is_packed ? detail::encode_types<Context, Args...>()
+ : detail::is_unpacked_bit | num_args) |
+ (num_named_args != 0
+ ? static_cast<unsigned long long>(detail::has_named_args_bit)
+ : 0);
+
+ public:
+ template <typename... T>
+ FMT_CONSTEXPR FMT_INLINE format_arg_store(T&&... args)
+ :
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
+ basic_format_args<Context>(*this),
+#endif
+ data_{detail::make_arg<
+ is_packed, Context,
+ detail::mapped_type_constant<remove_cvref_t<T>, Context>::value>(
+ FMT_FORWARD(args))...} {
+ detail::init_named_args(data_.named_args(), 0, 0, args...);
+ }
+};
+
+/**
+ \rst
+ Constructs a `~fmt::format_arg_store` object that contains references to
+ arguments and can be implicitly converted to `~fmt::format_args`. `Context`
+ can be omitted in which case it defaults to `~fmt::context`.
+ See `~fmt::arg` for lifetime considerations.
+ \endrst
+ */
+template <typename Context = format_context, typename... T>
+constexpr auto make_format_args(T&&... args)
+ -> format_arg_store<Context, remove_cvref_t<T>...> {
+ return {FMT_FORWARD(args)...};
+}
+
+/**
+ \rst
+ Returns a named argument to be used in a formatting function.
+ It should only be used in a call to a formatting function or
+ `dynamic_format_arg_store::push_back`.
+
+ **Example**::
+
+ fmt::print("Elapsed time: {s:.2f} seconds", fmt::arg("s", 1.23));
+ \endrst
+ */
+template <typename Char, typename T>
+inline auto arg(const Char* name, const T& arg) -> detail::named_arg<Char, T> {
+ static_assert(!detail::is_named_arg<T>(), "nested named arguments");
+ return {name, arg};
+}
+FMT_END_EXPORT
+
+/**
+ \rst
+ A view of a collection of formatting arguments. To avoid lifetime issues it
+ should only be used as a parameter type in type-erased functions such as
+ ``vformat``::
+
+ void vlog(string_view format_str, format_args args); // OK
+ format_args args = make_format_args(42); // Error: dangling reference
+ \endrst
+ */
+template <typename Context> class basic_format_args {
+ public:
+ using size_type = int;
+ using format_arg = basic_format_arg<Context>;
+
+ private:
+ // A descriptor that contains information about formatting arguments.
+ // If the number of arguments is less or equal to max_packed_args then
+ // argument types are passed in the descriptor. This reduces binary code size
+ // per formatting function call.
+ unsigned long long desc_;
+ union {
+ // If is_packed() returns true then argument values are stored in values_;
+ // otherwise they are stored in args_. This is done to improve cache
+ // locality and reduce compiled code size since storing larger objects
+ // may require more code (at least on x86-64) even if the same amount of
+ // data is actually copied to stack. It saves ~10% on the bloat test.
+ const detail::value<Context>* values_;
+ const format_arg* args_;
+ };
+
+ constexpr auto is_packed() const -> bool {
+ return (desc_ & detail::is_unpacked_bit) == 0;
+ }
+ auto has_named_args() const -> bool {
+ return (desc_ & detail::has_named_args_bit) != 0;
+ }
+
+ FMT_CONSTEXPR auto type(int index) const -> detail::type {
+ int shift = index * detail::packed_arg_bits;
+ unsigned int mask = (1 << detail::packed_arg_bits) - 1;
+ return static_cast<detail::type>((desc_ >> shift) & mask);
+ }
+
+ constexpr FMT_INLINE basic_format_args(unsigned long long desc,
+ const detail::value<Context>* values)
+ : desc_(desc), values_(values) {}
+ constexpr basic_format_args(unsigned long long desc, const format_arg* args)
+ : desc_(desc), args_(args) {}
+
+ public:
+ constexpr basic_format_args() : desc_(0), args_(nullptr) {}
+
+ /**
+ \rst
+ Constructs a `basic_format_args` object from `~fmt::format_arg_store`.
+ \endrst
+ */
+ template <typename... Args>
+ constexpr FMT_INLINE basic_format_args(
+ const format_arg_store<Context, Args...>& store)
+ : basic_format_args(format_arg_store<Context, Args...>::desc,
+ store.data_.args()) {}
+
+ /**
+ \rst
+ Constructs a `basic_format_args` object from
+ `~fmt::dynamic_format_arg_store`.
+ \endrst
+ */
+ constexpr FMT_INLINE basic_format_args(
+ const dynamic_format_arg_store<Context>& store)
+ : basic_format_args(store.get_types(), store.data()) {}
+
+ /**
+ \rst
+ Constructs a `basic_format_args` object from a dynamic set of arguments.
+ \endrst
+ */
+ constexpr basic_format_args(const format_arg* args, int count)
+ : basic_format_args(detail::is_unpacked_bit | detail::to_unsigned(count),
+ args) {}
+
+ /** Returns the argument with the specified id. */
+ FMT_CONSTEXPR auto get(int id) const -> format_arg {
+ format_arg arg;
+ if (!is_packed()) {
+ if (id < max_size()) arg = args_[id];
+ return arg;
+ }
+ if (id >= detail::max_packed_args) return arg;
+ arg.type_ = type(id);
+ if (arg.type_ == detail::type::none_type) return arg;
+ arg.value_ = values_[id];
+ return arg;
+ }
+
+ template <typename Char>
+ auto get(basic_string_view<Char> name) const -> format_arg {
+ int id = get_id(name);
+ return id >= 0 ? get(id) : format_arg();
+ }
+
+ template <typename Char>
+ auto get_id(basic_string_view<Char> name) const -> int {
+ if (!has_named_args()) return -1;
+ const auto& named_args =
+ (is_packed() ? values_[-1] : args_[-1].value_).named_args;
+ for (size_t i = 0; i < named_args.size; ++i) {
+ if (named_args.data[i].name == name) return named_args.data[i].id;
+ }
+ return -1;
+ }
+
+ auto max_size() const -> int {
+ unsigned long long max_packed = detail::max_packed_args;
+ return static_cast<int>(is_packed() ? max_packed
+ : desc_ & ~detail::is_unpacked_bit);
+ }
+};
+
+/** An alias to ``basic_format_args<format_context>``. */
+// A separate type would result in shorter symbols but break ABI compatibility
+// between clang and gcc on ARM (#1919).
+FMT_MODULE_EXPORT using format_args = basic_format_args<format_context>;
+
+// We cannot use enum classes as bit fields because of a gcc bug, so we put them
+// in namespaces instead (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61414).
+// Additionally, if an underlying type is specified, older gcc incorrectly warns
+// that the type is too small. Both bugs are fixed in gcc 9.3.
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 903
+# define FMT_ENUM_UNDERLYING_TYPE(type)
+#else
+# define FMT_ENUM_UNDERLYING_TYPE(type) : type
+#endif
+namespace align {
+enum type FMT_ENUM_UNDERLYING_TYPE(unsigned char){none, left, right, center,
+ numeric};
+}
+using align_t = align::type;
+namespace sign {
+enum type FMT_ENUM_UNDERLYING_TYPE(unsigned char){none, minus, plus, space};
+}
+using sign_t = sign::type;
+
+namespace detail {
+
+// Workaround an array initialization issue in gcc 4.8.
+template <typename Char> struct fill_t {
+ private:
+ enum { max_size = 4 };
+ Char data_[max_size] = {Char(' '), Char(0), Char(0), Char(0)};
+ unsigned char size_ = 1;
+
+ public:
+ FMT_CONSTEXPR void operator=(basic_string_view<Char> s) {
+ auto size = s.size();
+ FMT_ASSERT(size <= max_size, "invalid fill");
+ for (size_t i = 0; i < size; ++i) data_[i] = s[i];
+ size_ = static_cast<unsigned char>(size);
+ }
+
+ constexpr auto size() const -> size_t { return size_; }
+ constexpr auto data() const -> const Char* { return data_; }
+
+ FMT_CONSTEXPR auto operator[](size_t index) -> Char& { return data_[index]; }
+ FMT_CONSTEXPR auto operator[](size_t index) const -> const Char& {
+ return data_[index];
+ }
+};
+} // namespace detail
+
+enum class presentation_type : unsigned char {
+ none,
+ dec, // 'd'
+ oct, // 'o'
+ hex_lower, // 'x'
+ hex_upper, // 'X'
+ bin_lower, // 'b'
+ bin_upper, // 'B'
+ hexfloat_lower, // 'a'
+ hexfloat_upper, // 'A'
+ exp_lower, // 'e'
+ exp_upper, // 'E'
+ fixed_lower, // 'f'
+ fixed_upper, // 'F'
+ general_lower, // 'g'
+ general_upper, // 'G'
+ chr, // 'c'
+ string, // 's'
+ pointer, // 'p'
+ debug // '?'
+};
+
+// Format specifiers for built-in and string types.
+template <typename Char = char> struct format_specs {
+ int width;
+ int precision;
+ presentation_type type;
+ align_t align : 4;
+ sign_t sign : 3;
+ bool alt : 1; // Alternate form ('#').
+ bool localized : 1;
+ detail::fill_t<Char> fill;
+
+ constexpr format_specs()
+ : width(0),
+ precision(-1),
+ type(presentation_type::none),
+ align(align::none),
+ sign(sign::none),
+ alt(false),
+ localized(false) {}
+};
+
+namespace detail {
+
+enum class arg_id_kind { none, index, name };
+
+// An argument reference.
+template <typename Char> struct arg_ref {
+ FMT_CONSTEXPR arg_ref() : kind(arg_id_kind::none), val() {}
+
+ FMT_CONSTEXPR explicit arg_ref(int index)
+ : kind(arg_id_kind::index), val(index) {}
+ FMT_CONSTEXPR explicit arg_ref(basic_string_view<Char> name)
+ : kind(arg_id_kind::name), val(name) {}
+
+ FMT_CONSTEXPR auto operator=(int idx) -> arg_ref& {
+ kind = arg_id_kind::index;
+ val.index = idx;
+ return *this;
+ }
+
+ arg_id_kind kind;
+ union value {
+ FMT_CONSTEXPR value(int idx = 0) : index(idx) {}
+ FMT_CONSTEXPR value(basic_string_view<Char> n) : name(n) {}
+
+ int index;
+ basic_string_view<Char> name;
+ } val;
+};
+
+// Format specifiers with width and precision resolved at formatting rather
+// than parsing time to allow reusing the same parsed specifiers with
+// different sets of arguments (precompilation of format strings).
+template <typename Char = char>
+struct dynamic_format_specs : format_specs<Char> {
+ arg_ref<Char> width_ref;
+ arg_ref<Char> precision_ref;
+};
+
+// Converts a character to ASCII. Returns '\0' on conversion failure.
+template <typename Char, FMT_ENABLE_IF(std::is_integral<Char>::value)>
+constexpr auto to_ascii(Char c) -> char {
+ return c <= 0xff ? static_cast<char>(c) : '\0';
+}
+template <typename Char, FMT_ENABLE_IF(std::is_enum<Char>::value)>
+constexpr auto to_ascii(Char c) -> char {
+ return c <= 0xff ? static_cast<char>(c) : '\0';
+}
+
+// Returns the number of code units in a code point or 1 on error.
+template <typename Char>
+FMT_CONSTEXPR auto code_point_length(const Char* begin) -> int {
+ if (const_check(sizeof(Char) != 1)) return 1;
+ auto c = static_cast<unsigned char>(*begin);
+ return static_cast<int>((0x3a55000000000000ull >> (2 * (c >> 3))) & 0x3) + 1;
+}
+
+// Return the result via the out param to workaround gcc bug 77539.
+template <bool IS_CONSTEXPR, typename T, typename Ptr = const T*>
+FMT_CONSTEXPR auto find(Ptr first, Ptr last, T value, Ptr& out) -> bool {
+ for (out = first; out != last; ++out) {
+ if (*out == value) return true;
+ }
+ return false;
+}
+
+template <>
+inline auto find<false, char>(const char* first, const char* last, char value,
+ const char*& out) -> bool {
+ out = static_cast<const char*>(
+ std::memchr(first, value, to_unsigned(last - first)));
+ return out != nullptr;
+}
+
+// Parses the range [begin, end) as an unsigned integer. This function assumes
+// that the range is non-empty and the first character is a digit.
+template <typename Char>
+FMT_CONSTEXPR auto parse_nonnegative_int(const Char*& begin, const Char* end,
+ int error_value) noexcept -> int {
+ FMT_ASSERT(begin != end && '0' <= *begin && *begin <= '9', "");
+ unsigned value = 0, prev = 0;
+ auto p = begin;
+ do {
+ prev = value;
+ value = value * 10 + unsigned(*p - '0');
+ ++p;
+ } while (p != end && '0' <= *p && *p <= '9');
+ auto num_digits = p - begin;
+ begin = p;
+ if (num_digits <= std::numeric_limits<int>::digits10)
+ return static_cast<int>(value);
+ // Check for overflow.
+ const unsigned max = to_unsigned((std::numeric_limits<int>::max)());
+ return num_digits == std::numeric_limits<int>::digits10 + 1 &&
+ prev * 10ull + unsigned(p[-1] - '0') <= max
+ ? static_cast<int>(value)
+ : error_value;
+}
+
+FMT_CONSTEXPR inline auto parse_align(char c) -> align_t {
+ switch (c) {
+ case '<':
+ return align::left;
+ case '>':
+ return align::right;
+ case '^':
+ return align::center;
+ }
+ return align::none;
+}
+
+template <typename Char> constexpr auto is_name_start(Char c) -> bool {
+ return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || c == '_';
+}
+
+template <typename Char, typename Handler>
+FMT_CONSTEXPR auto do_parse_arg_id(const Char* begin, const Char* end,
+ Handler&& handler) -> const Char* {
+ Char c = *begin;
+ if (c >= '0' && c <= '9') {
+ int index = 0;
+ constexpr int max = (std::numeric_limits<int>::max)();
+ if (c != '0')
+ index = parse_nonnegative_int(begin, end, max);
+ else
+ ++begin;
+ if (begin == end || (*begin != '}' && *begin != ':'))
+ throw_format_error("invalid format string");
+ else
+ handler.on_index(index);
+ return begin;
+ }
+ if (!is_name_start(c)) {
+ throw_format_error("invalid format string");
+ return begin;
+ }
+ auto it = begin;
+ do {
+ ++it;
+ } while (it != end && (is_name_start(*it) || ('0' <= *it && *it <= '9')));
+ handler.on_name({begin, to_unsigned(it - begin)});
+ return it;
+}
+
+template <typename Char, typename Handler>
+FMT_CONSTEXPR FMT_INLINE auto parse_arg_id(const Char* begin, const Char* end,
+ Handler&& handler) -> const Char* {
+ FMT_ASSERT(begin != end, "");
+ Char c = *begin;
+ if (c != '}' && c != ':') return do_parse_arg_id(begin, end, handler);
+ handler.on_auto();
+ return begin;
+}
+
+template <typename Char> struct dynamic_spec_id_handler {
+ basic_format_parse_context<Char>& ctx;
+ arg_ref<Char>& ref;
+
+ FMT_CONSTEXPR void on_auto() {
+ int id = ctx.next_arg_id();
+ ref = arg_ref<Char>(id);
+ ctx.check_dynamic_spec(id);
+ }
+ FMT_CONSTEXPR void on_index(int id) {
+ ref = arg_ref<Char>(id);
+ ctx.check_arg_id(id);
+ ctx.check_dynamic_spec(id);
+ }
+ FMT_CONSTEXPR void on_name(basic_string_view<Char> id) {
+ ref = arg_ref<Char>(id);
+ ctx.check_arg_id(id);
+ }
+};
+
+// Parses [integer | "{" [arg_id] "}"].
+template <typename Char>
+FMT_CONSTEXPR auto parse_dynamic_spec(const Char* begin, const Char* end,
+ int& value, arg_ref<Char>& ref,
+ basic_format_parse_context<Char>& ctx)
+ -> const Char* {
+ FMT_ASSERT(begin != end, "");
+ if ('0' <= *begin && *begin <= '9') {
+ int val = parse_nonnegative_int(begin, end, -1);
+ if (val != -1)
+ value = val;
+ else
+ throw_format_error("number is too big");
+ } else if (*begin == '{') {
+ ++begin;
+ auto handler = dynamic_spec_id_handler<Char>{ctx, ref};
+ if (begin != end) begin = parse_arg_id(begin, end, handler);
+ if (begin != end && *begin == '}') return ++begin;
+ throw_format_error("invalid format string");
+ }
+ return begin;
+}
+
+template <typename Char>
+FMT_CONSTEXPR auto parse_precision(const Char* begin, const Char* end,
+ int& value, arg_ref<Char>& ref,
+ basic_format_parse_context<Char>& ctx)
+ -> const Char* {
+ ++begin;
+ if (begin == end || *begin == '}') {
+ throw_format_error("invalid precision");
+ return begin;
+ }
+ return parse_dynamic_spec(begin, end, value, ref, ctx);
+}
+
+enum class state { start, align, sign, hash, zero, width, precision, locale };
+
+// Parses standard format specifiers.
+template <typename Char>
+FMT_CONSTEXPR FMT_INLINE auto parse_format_specs(
+ const Char* begin, const Char* end, dynamic_format_specs<Char>& specs,
+ basic_format_parse_context<Char>& ctx, type arg_type) -> const Char* {
+ auto c = '\0';
+ if (end - begin > 1) {
+ auto next = to_ascii(begin[1]);
+ c = parse_align(next) == align::none ? to_ascii(*begin) : '\0';
+ } else {
+ if (begin == end) return begin;
+ c = to_ascii(*begin);
+ }
+
+ struct {
+ state current_state = state::start;
+ FMT_CONSTEXPR void operator()(state s, bool valid = true) {
+ if (current_state >= s || !valid)
+ throw_format_error("invalid format specifier");
+ current_state = s;
+ }
+ } enter_state;
+
+ using pres = presentation_type;
+ constexpr auto integral_set = sint_set | uint_set | bool_set | char_set;
+ struct {
+ const Char*& begin;
+ dynamic_format_specs<Char>& specs;
+ type arg_type;
+
+ FMT_CONSTEXPR auto operator()(pres type, int set) -> const Char* {
+ if (!in(arg_type, set)) throw_format_error("invalid format specifier");
+ specs.type = type;
+ return begin + 1;
+ }
+ } parse_presentation_type{begin, specs, arg_type};
+
+ for (;;) {
+ switch (c) {
+ case '<':
+ case '>':
+ case '^':
+ enter_state(state::align);
+ specs.align = parse_align(c);
+ ++begin;
+ break;
+ case '+':
+ case '-':
+ case ' ':
+ enter_state(state::sign, in(arg_type, sint_set | float_set));
+ switch (c) {
+ case '+':
+ specs.sign = sign::plus;
+ break;
+ case '-':
+ specs.sign = sign::minus;
+ break;
+ case ' ':
+ specs.sign = sign::space;
+ break;
+ }
+ ++begin;
+ break;
+ case '#':
+ enter_state(state::hash, is_arithmetic_type(arg_type));
+ specs.alt = true;
+ ++begin;
+ break;
+ case '0':
+ enter_state(state::zero);
+ if (!is_arithmetic_type(arg_type))
+ throw_format_error("format specifier requires numeric argument");
+ if (specs.align == align::none) {
+ // Ignore 0 if align is specified for compatibility with std::format.
+ specs.align = align::numeric;
+ specs.fill[0] = Char('0');
+ }
+ ++begin;
+ break;
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ case '{':
+ enter_state(state::width);
+ begin = parse_dynamic_spec(begin, end, specs.width, specs.width_ref, ctx);
+ break;
+ case '.':
+ enter_state(state::precision,
+ in(arg_type, float_set | string_set | cstring_set));
+ begin = parse_precision(begin, end, specs.precision, specs.precision_ref,
+ ctx);
+ break;
+ case 'L':
+ enter_state(state::locale, is_arithmetic_type(arg_type));
+ specs.localized = true;
+ ++begin;
+ break;
+ case 'd':
+ return parse_presentation_type(pres::dec, integral_set);
+ case 'o':
+ return parse_presentation_type(pres::oct, integral_set);
+ case 'x':
+ return parse_presentation_type(pres::hex_lower, integral_set);
+ case 'X':
+ return parse_presentation_type(pres::hex_upper, integral_set);
+ case 'b':
+ return parse_presentation_type(pres::bin_lower, integral_set);
+ case 'B':
+ return parse_presentation_type(pres::bin_upper, integral_set);
+ case 'a':
+ return parse_presentation_type(pres::hexfloat_lower, float_set);
+ case 'A':
+ return parse_presentation_type(pres::hexfloat_upper, float_set);
+ case 'e':
+ return parse_presentation_type(pres::exp_lower, float_set);
+ case 'E':
+ return parse_presentation_type(pres::exp_upper, float_set);
+ case 'f':
+ return parse_presentation_type(pres::fixed_lower, float_set);
+ case 'F':
+ return parse_presentation_type(pres::fixed_upper, float_set);
+ case 'g':
+ return parse_presentation_type(pres::general_lower, float_set);
+ case 'G':
+ return parse_presentation_type(pres::general_upper, float_set);
+ case 'c':
+ return parse_presentation_type(pres::chr, integral_set);
+ case 's':
+ return parse_presentation_type(pres::string,
+ bool_set | string_set | cstring_set);
+ case 'p':
+ return parse_presentation_type(pres::pointer, pointer_set | cstring_set);
+ case '?':
+ return parse_presentation_type(pres::debug,
+ char_set | string_set | cstring_set);
+ case '}':
+ return begin;
+ default: {
+ if (*begin == '}') return begin;
+ // Parse fill and alignment.
+ auto fill_end = begin + code_point_length(begin);
+ if (end - fill_end <= 0) {
+ throw_format_error("invalid format specifier");
+ return begin;
+ }
+ if (*begin == '{') {
+ throw_format_error("invalid fill character '{'");
+ return begin;
+ }
+ auto align = parse_align(to_ascii(*fill_end));
+ enter_state(state::align, align != align::none);
+ specs.fill = {begin, to_unsigned(fill_end - begin)};
+ specs.align = align;
+ begin = fill_end + 1;
+ }
+ }
+ if (begin == end) return begin;
+ c = to_ascii(*begin);
+ }
+}
+
+template <typename Char, typename Handler>
+FMT_CONSTEXPR auto parse_replacement_field(const Char* begin, const Char* end,
+ Handler&& handler) -> const Char* {
+ struct id_adapter {
+ Handler& handler;
+ int arg_id;
+
+ FMT_CONSTEXPR void on_auto() { arg_id = handler.on_arg_id(); }
+ FMT_CONSTEXPR void on_index(int id) { arg_id = handler.on_arg_id(id); }
+ FMT_CONSTEXPR void on_name(basic_string_view<Char> id) {
+ arg_id = handler.on_arg_id(id);
+ }
+ };
+
+ ++begin;
+ if (begin == end) return handler.on_error("invalid format string"), end;
+ if (*begin == '}') {
+ handler.on_replacement_field(handler.on_arg_id(), begin);
+ } else if (*begin == '{') {
+ handler.on_text(begin, begin + 1);
+ } else {
+ auto adapter = id_adapter{handler, 0};
+ begin = parse_arg_id(begin, end, adapter);
+ Char c = begin != end ? *begin : Char();
+ if (c == '}') {
+ handler.on_replacement_field(adapter.arg_id, begin);
+ } else if (c == ':') {
+ begin = handler.on_format_specs(adapter.arg_id, begin + 1, end);
+ if (begin == end || *begin != '}')
+ return handler.on_error("unknown format specifier"), end;
+ } else {
+ return handler.on_error("missing '}' in format string"), end;
+ }
+ }
+ return begin + 1;
+}
+
+template <bool IS_CONSTEXPR, typename Char, typename Handler>
+FMT_CONSTEXPR FMT_INLINE void parse_format_string(
+ basic_string_view<Char> format_str, Handler&& handler) {
+ auto begin = format_str.data();
+ auto end = begin + format_str.size();
+ if (end - begin < 32) {
+ // Use a simple loop instead of memchr for small strings.
+ const Char* p = begin;
+ while (p != end) {
+ auto c = *p++;
+ if (c == '{') {
+ handler.on_text(begin, p - 1);
+ begin = p = parse_replacement_field(p - 1, end, handler);
+ } else if (c == '}') {
+ if (p == end || *p != '}')
+ return handler.on_error("unmatched '}' in format string");
+ handler.on_text(begin, p);
+ begin = ++p;
+ }
+ }
+ handler.on_text(begin, end);
+ return;
+ }
+ struct writer {
+ FMT_CONSTEXPR void operator()(const Char* from, const Char* to) {
+ if (from == to) return;
+ for (;;) {
+ const Char* p = nullptr;
+ if (!find<IS_CONSTEXPR>(from, to, Char('}'), p))
+ return handler_.on_text(from, to);
+ ++p;
+ if (p == to || *p != '}')
+ return handler_.on_error("unmatched '}' in format string");
+ handler_.on_text(from, p);
+ from = p + 1;
+ }
+ }
+ Handler& handler_;
+ } write = {handler};
+ while (begin != end) {
+ // Doing two passes with memchr (one for '{' and another for '}') is up to
+ // 2.5x faster than the naive one-pass implementation on big format strings.
+ const Char* p = begin;
+ if (*begin != '{' && !find<IS_CONSTEXPR>(begin + 1, end, Char('{'), p))
+ return write(begin, end);
+ write(begin, p);
+ begin = parse_replacement_field(p, end, handler);
+ }
+}
+
+template <typename T, bool = is_named_arg<T>::value> struct strip_named_arg {
+ using type = T;
+};
+template <typename T> struct strip_named_arg<T, true> {
+ using type = remove_cvref_t<decltype(T::value)>;
+};
+
+template <typename T, typename ParseContext>
+FMT_CONSTEXPR auto parse_format_specs(ParseContext& ctx)
+ -> decltype(ctx.begin()) {
+ using char_type = typename ParseContext::char_type;
+ using context = buffer_context<char_type>;
+ using mapped_type = conditional_t<
+ mapped_type_constant<T, context>::value != type::custom_type,
+ decltype(arg_mapper<context>().map(std::declval<const T&>())),
+ typename strip_named_arg<T>::type>;
+ return formatter<mapped_type, char_type>().parse(ctx);
+}
+
+// Checks char specs and returns true iff the presentation type is char-like.
+template <typename Char>
+FMT_CONSTEXPR auto check_char_specs(const format_specs<Char>& specs) -> bool {
+ if (specs.type != presentation_type::none &&
+ specs.type != presentation_type::chr &&
+ specs.type != presentation_type::debug) {
+ return false;
+ }
+ if (specs.align == align::numeric || specs.sign != sign::none || specs.alt)
+ throw_format_error("invalid format specifier for char");
+ return true;
+}
+
+constexpr FMT_INLINE_VARIABLE int invalid_arg_index = -1;
+
+#if FMT_USE_NONTYPE_TEMPLATE_ARGS
+template <int N, typename T, typename... Args, typename Char>
+constexpr auto get_arg_index_by_name(basic_string_view<Char> name) -> int {
+ if constexpr (is_statically_named_arg<T>()) {
+ if (name == T::name) return N;
+ }
+ if constexpr (sizeof...(Args) > 0)
+ return get_arg_index_by_name<N + 1, Args...>(name);
+ (void)name; // Workaround an MSVC bug about "unused" parameter.
+ return invalid_arg_index;
+}
+#endif
+
+template <typename... Args, typename Char>
+FMT_CONSTEXPR auto get_arg_index_by_name(basic_string_view<Char> name) -> int {
+#if FMT_USE_NONTYPE_TEMPLATE_ARGS
+ if constexpr (sizeof...(Args) > 0)
+ return get_arg_index_by_name<0, Args...>(name);
+#endif
+ (void)name;
+ return invalid_arg_index;
+}
+
+template <typename Char, typename... Args> class format_string_checker {
+ private:
+ using parse_context_type = compile_parse_context<Char>;
+ static constexpr int num_args = sizeof...(Args);
+
+ // Format specifier parsing function.
+ // In the future basic_format_parse_context will replace compile_parse_context
+ // here and will use is_constant_evaluated and downcasting to access the data
+ // needed for compile-time checks: https://godbolt.org/z/GvWzcTjh1.
+ using parse_func = const Char* (*)(parse_context_type&);
+
+ parse_context_type context_;
+ parse_func parse_funcs_[num_args > 0 ? static_cast<size_t>(num_args) : 1];
+ type types_[num_args > 0 ? static_cast<size_t>(num_args) : 1];
+
+ public:
+ explicit FMT_CONSTEXPR format_string_checker(basic_string_view<Char> fmt)
+ : context_(fmt, num_args, types_),
+ parse_funcs_{&parse_format_specs<Args, parse_context_type>...},
+ types_{mapped_type_constant<Args, buffer_context<Char>>::value...} {}
+
+ FMT_CONSTEXPR void on_text(const Char*, const Char*) {}
+
+ FMT_CONSTEXPR auto on_arg_id() -> int { return context_.next_arg_id(); }
+ FMT_CONSTEXPR auto on_arg_id(int id) -> int {
+ return context_.check_arg_id(id), id;
+ }
+ FMT_CONSTEXPR auto on_arg_id(basic_string_view<Char> id) -> int {
+#if FMT_USE_NONTYPE_TEMPLATE_ARGS
+ auto index = get_arg_index_by_name<Args...>(id);
+ if (index == invalid_arg_index) on_error("named argument is not found");
+ return index;
+#else
+ (void)id;
+ on_error("compile-time checks for named arguments require C++20 support");
+ return 0;
+#endif
+ }
+
+ FMT_CONSTEXPR void on_replacement_field(int, const Char*) {}
+
+ FMT_CONSTEXPR auto on_format_specs(int id, const Char* begin, const Char*)
+ -> const Char* {
+ context_.advance_to(begin);
+ // id >= 0 check is a workaround for gcc 10 bug (#2065).
+ return id >= 0 && id < num_args ? parse_funcs_[id](context_) : begin;
+ }
+
+ FMT_CONSTEXPR void on_error(const char* message) {
+ throw_format_error(message);
+ }
+};
+
+// Reports a compile-time error if S is not a valid format string.
+template <typename..., typename S, FMT_ENABLE_IF(!is_compile_string<S>::value)>
+FMT_INLINE void check_format_string(const S&) {
+#ifdef FMT_ENFORCE_COMPILE_STRING
+ static_assert(is_compile_string<S>::value,
+ "FMT_ENFORCE_COMPILE_STRING requires all format strings to use "
+ "FMT_STRING.");
+#endif
+}
+template <typename... Args, typename S,
+ FMT_ENABLE_IF(is_compile_string<S>::value)>
+void check_format_string(S format_str) {
+ using char_t = typename S::char_type;
+ FMT_CONSTEXPR auto s = basic_string_view<char_t>(format_str);
+ using checker = format_string_checker<char_t, remove_cvref_t<Args>...>;
+ FMT_CONSTEXPR bool error = (parse_format_string<true>(s, checker(s)), true);
+ ignore_unused(error);
+}
+
+template <typename Char = char> struct vformat_args {
+ using type = basic_format_args<
+ basic_format_context<std::back_insert_iterator<buffer<Char>>, Char>>;
+};
+template <> struct vformat_args<char> { using type = format_args; };
+
+// Use vformat_args and avoid type_identity to keep symbols short.
+template <typename Char>
+void vformat_to(buffer<Char>& buf, basic_string_view<Char> fmt,
+ typename vformat_args<Char>::type args, locale_ref loc = {});
+
+FMT_API void vprint_mojibake(std::FILE*, string_view, format_args);
+#ifndef _WIN32
+inline void vprint_mojibake(std::FILE*, string_view, format_args) {}
+#endif
+} // namespace detail
+
+FMT_BEGIN_EXPORT
+
+// A formatter specialization for natively supported types.
+template <typename T, typename Char>
+struct formatter<T, Char,
+ enable_if_t<detail::type_constant<T, Char>::value !=
+ detail::type::custom_type>> {
+ private:
+ detail::dynamic_format_specs<Char> specs_;
+
+ public:
+ template <typename ParseContext>
+ FMT_CONSTEXPR auto parse(ParseContext& ctx) -> const Char* {
+ auto type = detail::type_constant<T, Char>::value;
+ auto end =
+ detail::parse_format_specs(ctx.begin(), ctx.end(), specs_, ctx, type);
+ if (type == detail::type::char_type) detail::check_char_specs(specs_);
+ return end;
+ }
+
+ template <detail::type U = detail::type_constant<T, Char>::value,
+ FMT_ENABLE_IF(U == detail::type::string_type ||
+ U == detail::type::cstring_type ||
+ U == detail::type::char_type)>
+ FMT_CONSTEXPR void set_debug_format(bool set = true) {
+ specs_.type = set ? presentation_type::debug : presentation_type::none;
+ }
+
+ template <typename FormatContext>
+ FMT_CONSTEXPR auto format(const T& val, FormatContext& ctx) const
+ -> decltype(ctx.out());
+};
+
+#define FMT_FORMAT_AS(Type, Base) \
+ template <typename Char> \
+ struct formatter<Type, Char> : formatter<Base, Char> { \
+ template <typename FormatContext> \
+ auto format(const Type& val, FormatContext& ctx) const \
+ -> decltype(ctx.out()) { \
+ return formatter<Base, Char>::format(static_cast<Base>(val), ctx); \
+ } \
+ }
+
+FMT_FORMAT_AS(signed char, int);
+FMT_FORMAT_AS(unsigned char, unsigned);
+FMT_FORMAT_AS(short, int);
+FMT_FORMAT_AS(unsigned short, unsigned);
+FMT_FORMAT_AS(long, long long);
+FMT_FORMAT_AS(unsigned long, unsigned long long);
+FMT_FORMAT_AS(Char*, const Char*);
+FMT_FORMAT_AS(std::basic_string<Char>, basic_string_view<Char>);
+FMT_FORMAT_AS(std::nullptr_t, const void*);
+FMT_FORMAT_AS(detail::std_string_view<Char>, basic_string_view<Char>);
+
+template <typename Char = char> struct runtime_format_string {
+ basic_string_view<Char> str;
+};
+
+/** A compile-time format string. */
+template <typename Char, typename... Args> class basic_format_string {
+ private:
+ basic_string_view<Char> str_;
+
+ public:
+ template <typename S,
+ FMT_ENABLE_IF(
+ std::is_convertible<const S&, basic_string_view<Char>>::value)>
+ FMT_CONSTEVAL FMT_INLINE basic_format_string(const S& s) : str_(s) {
+ static_assert(
+ detail::count<
+ (std::is_base_of<detail::view, remove_reference_t<Args>>::value &&
+ std::is_reference<Args>::value)...>() == 0,
+ "passing views as lvalues is disallowed");
+#ifdef FMT_HAS_CONSTEVAL
+ if constexpr (detail::count_named_args<Args...>() ==
+ detail::count_statically_named_args<Args...>()) {
+ using checker =
+ detail::format_string_checker<Char, remove_cvref_t<Args>...>;
+ detail::parse_format_string<true>(str_, checker(s));
+ }
+#else
+ detail::check_format_string<Args...>(s);
+#endif
+ }
+ basic_format_string(runtime_format_string<Char> fmt) : str_(fmt.str) {}
+
+ FMT_INLINE operator basic_string_view<Char>() const { return str_; }
+ FMT_INLINE auto get() const -> basic_string_view<Char> { return str_; }
+};
+
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
+// Workaround broken conversion on older gcc.
+template <typename...> using format_string = string_view;
+inline auto runtime(string_view s) -> string_view { return s; }
+#else
+template <typename... Args>
+using format_string = basic_format_string<char, type_identity_t<Args>...>;
+/**
+ \rst
+ Creates a runtime format string.
+
+ **Example**::
+
+ // Check format string at runtime instead of compile-time.
+ fmt::print(fmt::runtime("{:d}"), "I am not a number");
+ \endrst
+ */
+inline auto runtime(string_view s) -> runtime_format_string<> { return {{s}}; }
+#endif
+
+FMT_API auto vformat(string_view fmt, format_args args) -> std::string;
+
+/**
+ \rst
+ Formats ``args`` according to specifications in ``fmt`` and returns the result
+ as a string.
+
+ **Example**::
+
+ #include <fmt/core.h>
+ std::string message = fmt::format("The answer is {}.", 42);
+ \endrst
+*/
+template <typename... T>
+FMT_NODISCARD FMT_INLINE auto format(format_string<T...> fmt, T&&... args)
+ -> std::string {
+ return vformat(fmt, fmt::make_format_args(args...));
+}
+
+/** Formats a string and writes the output to ``out``. */
+template <typename OutputIt,
+ FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
+auto vformat_to(OutputIt out, string_view fmt, format_args args) -> OutputIt {
+ auto&& buf = detail::get_buffer<char>(out);
+ detail::vformat_to(buf, fmt, args, {});
+ return detail::get_iterator(buf, out);
+}
+
+/**
+ \rst
+ Formats ``args`` according to specifications in ``fmt``, writes the result to
+ the output iterator ``out`` and returns the iterator past the end of the output
+ range. `format_to` does not append a terminating null character.
+
+ **Example**::
+
+ auto out = std::vector<char>();
+ fmt::format_to(std::back_inserter(out), "{}", 42);
+ \endrst
+ */
+template <typename OutputIt, typename... T,
+ FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
+FMT_INLINE auto format_to(OutputIt out, format_string<T...> fmt, T&&... args)
+ -> OutputIt {
+ return vformat_to(out, fmt, fmt::make_format_args(args...));
+}
+
+template <typename OutputIt> struct format_to_n_result {
+ /** Iterator past the end of the output range. */
+ OutputIt out;
+ /** Total (not truncated) output size. */
+ size_t size;
+};
+
+template <typename OutputIt, typename... T,
+ FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
+auto vformat_to_n(OutputIt out, size_t n, string_view fmt, format_args args)
+ -> format_to_n_result<OutputIt> {
+ using traits = detail::fixed_buffer_traits;
+ auto buf = detail::iterator_buffer<OutputIt, char, traits>(out, n);
+ detail::vformat_to(buf, fmt, args, {});
+ return {buf.out(), buf.count()};
+}
+
+/**
+ \rst
+ Formats ``args`` according to specifications in ``fmt``, writes up to ``n``
+ characters of the result to the output iterator ``out`` and returns the total
+ (not truncated) output size and the iterator past the end of the output range.
+ `format_to_n` does not append a terminating null character.
+ \endrst
+ */
+template <typename OutputIt, typename... T,
+ FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
+FMT_INLINE auto format_to_n(OutputIt out, size_t n, format_string<T...> fmt,
+ T&&... args) -> format_to_n_result<OutputIt> {
+ return vformat_to_n(out, n, fmt, fmt::make_format_args(args...));
+}
+
+/** Returns the number of chars in the output of ``format(fmt, args...)``. */
+template <typename... T>
+FMT_NODISCARD FMT_INLINE auto formatted_size(format_string<T...> fmt,
+ T&&... args) -> size_t {
+ auto buf = detail::counting_buffer<>();
+ detail::vformat_to<char>(buf, fmt, fmt::make_format_args(args...), {});
+ return buf.count();
+}
+
+FMT_API void vprint(string_view fmt, format_args args);
+FMT_API void vprint(std::FILE* f, string_view fmt, format_args args);
+
+/**
+ \rst
+ Formats ``args`` according to specifications in ``fmt`` and writes the output
+ to ``stdout``.
+
+ **Example**::
+
+ fmt::print("Elapsed time: {0:.2f} seconds", 1.23);
+ \endrst
+ */
+template <typename... T>
+FMT_INLINE void print(format_string<T...> fmt, T&&... args) {
+ const auto& vargs = fmt::make_format_args(args...);
+ return detail::is_utf8() ? vprint(fmt, vargs)
+ : detail::vprint_mojibake(stdout, fmt, vargs);
+}
+
+/**
+ \rst
+ Formats ``args`` according to specifications in ``fmt`` and writes the
+ output to the file ``f``.
+
+ **Example**::
+
+ fmt::print(stderr, "Don't {}!", "panic");
+ \endrst
+ */
+template <typename... T>
+FMT_INLINE void print(std::FILE* f, format_string<T...> fmt, T&&... args) {
+ const auto& vargs = fmt::make_format_args(args...);
+ return detail::is_utf8() ? vprint(f, fmt, vargs)
+ : detail::vprint_mojibake(f, fmt, vargs);
+}
+
+/**
+ Formats ``args`` according to specifications in ``fmt`` and writes the
+ output to the file ``f`` followed by a newline.
+ */
+template <typename... T>
+FMT_INLINE void println(std::FILE* f, format_string<T...> fmt, T&&... args) {
+ return fmt::print(f, "{}\n", fmt::format(fmt, std::forward<T>(args)...));
+}
+
+/**
+ Formats ``args`` according to specifications in ``fmt`` and writes the output
+ to ``stdout`` followed by a newline.
+ */
+template <typename... T>
+FMT_INLINE void println(format_string<T...> fmt, T&&... args) {
+ return fmt::println(stdout, fmt, std::forward<T>(args)...);
+}
+
+FMT_END_EXPORT
+FMT_GCC_PRAGMA("GCC pop_options")
+FMT_END_NAMESPACE
+
+#ifdef FMT_HEADER_ONLY
+# include "format.h"
+#endif
+#endif // FMT_CORE_H_
diff --git a/contrib/fmt/include/fmt/format-inl.h b/contrib/fmt/include/fmt/format-inl.h
new file mode 100644
index 0000000..5bae3c7
--- /dev/null
+++ b/contrib/fmt/include/fmt/format-inl.h
@@ -0,0 +1,1681 @@
+// Formatting library for C++ - implementation
+//
+// Copyright (c) 2012 - 2016, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_FORMAT_INL_H_
+#define FMT_FORMAT_INL_H_
+
+#include <algorithm>
+#include <cerrno> // errno
+#include <climits>
+#include <cmath>
+#include <exception>
+
+#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
+# include <locale>
+#endif
+
+#ifdef _WIN32
+# include <io.h> // _isatty
+#endif
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+namespace detail {
+
+FMT_FUNC void assert_fail(const char* file, int line, const char* message) {
+ // Use unchecked std::fprintf to avoid triggering another assertion when
+ // writing to stderr fails
+ std::fprintf(stderr, "%s:%d: assertion failed: %s", file, line, message);
+ // Chosen instead of std::abort to satisfy Clang in CUDA mode during device
+ // code pass.
+ std::terminate();
+}
+
+FMT_FUNC void throw_format_error(const char* message) {
+ FMT_THROW(format_error(message));
+}
+
+FMT_FUNC void format_error_code(detail::buffer<char>& out, int error_code,
+ string_view message) noexcept {
+ // Report error code making sure that the output fits into
+ // inline_buffer_size to avoid dynamic memory allocation and potential
+ // bad_alloc.
+ out.try_resize(0);
+ static const char SEP[] = ": ";
+ static const char ERROR_STR[] = "error ";
+ // Subtract 2 to account for terminating null characters in SEP and ERROR_STR.
+ size_t error_code_size = sizeof(SEP) + sizeof(ERROR_STR) - 2;
+ auto abs_value = static_cast<uint32_or_64_or_128_t<int>>(error_code);
+ if (detail::is_negative(error_code)) {
+ abs_value = 0 - abs_value;
+ ++error_code_size;
+ }
+ error_code_size += detail::to_unsigned(detail::count_digits(abs_value));
+ auto it = buffer_appender<char>(out);
+ if (message.size() <= inline_buffer_size - error_code_size)
+ format_to(it, FMT_STRING("{}{}"), message, SEP);
+ format_to(it, FMT_STRING("{}{}"), ERROR_STR, error_code);
+ FMT_ASSERT(out.size() <= inline_buffer_size, "");
+}
+
+FMT_FUNC void report_error(format_func func, int error_code,
+ const char* message) noexcept {
+ memory_buffer full_message;
+ func(full_message, error_code, message);
+ // Don't use fwrite_fully because the latter may throw.
+ if (std::fwrite(full_message.data(), full_message.size(), 1, stderr) > 0)
+ std::fputc('\n', stderr);
+}
+
+// A wrapper around fwrite that throws on error.
+inline void fwrite_fully(const void* ptr, size_t size, size_t count,
+ FILE* stream) {
+ size_t written = std::fwrite(ptr, size, count, stream);
+ if (written < count)
+ FMT_THROW(system_error(errno, FMT_STRING("cannot write to file")));
+}
+
+#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
+template <typename Locale>
+locale_ref::locale_ref(const Locale& loc) : locale_(&loc) {
+ static_assert(std::is_same<Locale, std::locale>::value, "");
+}
+
+template <typename Locale> Locale locale_ref::get() const {
+ static_assert(std::is_same<Locale, std::locale>::value, "");
+ return locale_ ? *static_cast<const std::locale*>(locale_) : std::locale();
+}
+
+template <typename Char>
+FMT_FUNC auto thousands_sep_impl(locale_ref loc) -> thousands_sep_result<Char> {
+ auto& facet = std::use_facet<std::numpunct<Char>>(loc.get<std::locale>());
+ auto grouping = facet.grouping();
+ auto thousands_sep = grouping.empty() ? Char() : facet.thousands_sep();
+ return {std::move(grouping), thousands_sep};
+}
+template <typename Char> FMT_FUNC Char decimal_point_impl(locale_ref loc) {
+ return std::use_facet<std::numpunct<Char>>(loc.get<std::locale>())
+ .decimal_point();
+}
+#else
+template <typename Char>
+FMT_FUNC auto thousands_sep_impl(locale_ref) -> thousands_sep_result<Char> {
+ return {"\03", FMT_STATIC_THOUSANDS_SEPARATOR};
+}
+template <typename Char> FMT_FUNC Char decimal_point_impl(locale_ref) {
+ return '.';
+}
+#endif
+
+FMT_FUNC auto write_loc(appender out, loc_value value,
+ const format_specs<>& specs, locale_ref loc) -> bool {
+#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
+ auto locale = loc.get<std::locale>();
+ // We cannot use the num_put<char> facet because it may produce output in
+ // a wrong encoding.
+ using facet = format_facet<std::locale>;
+ if (std::has_facet<facet>(locale))
+ return std::use_facet<facet>(locale).put(out, value, specs);
+ return facet(locale).put(out, value, specs);
+#endif
+ return false;
+}
+} // namespace detail
+
+template <typename Locale> typename Locale::id format_facet<Locale>::id;
+
+#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
+template <typename Locale> format_facet<Locale>::format_facet(Locale& loc) {
+ auto& numpunct = std::use_facet<std::numpunct<char>>(loc);
+ grouping_ = numpunct.grouping();
+ if (!grouping_.empty()) separator_ = std::string(1, numpunct.thousands_sep());
+}
+
+template <>
+FMT_API FMT_FUNC auto format_facet<std::locale>::do_put(
+ appender out, loc_value val, const format_specs<>& specs) const -> bool {
+ return val.visit(
+ detail::loc_writer<>{out, specs, separator_, grouping_, decimal_point_});
+}
+#endif
+
+FMT_FUNC std::system_error vsystem_error(int error_code, string_view fmt,
+ format_args args) {
+ auto ec = std::error_code(error_code, std::generic_category());
+ return std::system_error(ec, vformat(fmt, args));
+}
+
+namespace detail {
+
+template <typename F> inline bool operator==(basic_fp<F> x, basic_fp<F> y) {
+ return x.f == y.f && x.e == y.e;
+}
+
+// Compilers should be able to optimize this into the ror instruction.
+FMT_CONSTEXPR inline uint32_t rotr(uint32_t n, uint32_t r) noexcept {
+ r &= 31;
+ return (n >> r) | (n << (32 - r));
+}
+FMT_CONSTEXPR inline uint64_t rotr(uint64_t n, uint32_t r) noexcept {
+ r &= 63;
+ return (n >> r) | (n << (64 - r));
+}
+
+// Implementation of Dragonbox algorithm: https://github.com/jk-jeon/dragonbox.
+namespace dragonbox {
+// Computes upper 64 bits of multiplication of a 32-bit unsigned integer and a
+// 64-bit unsigned integer.
+inline uint64_t umul96_upper64(uint32_t x, uint64_t y) noexcept {
+ return umul128_upper64(static_cast<uint64_t>(x) << 32, y);
+}
+
+// Computes lower 128 bits of multiplication of a 64-bit unsigned integer and a
+// 128-bit unsigned integer.
+inline uint128_fallback umul192_lower128(uint64_t x,
+ uint128_fallback y) noexcept {
+ uint64_t high = x * y.high();
+ uint128_fallback high_low = umul128(x, y.low());
+ return {high + high_low.high(), high_low.low()};
+}
+
+// Computes lower 64 bits of multiplication of a 32-bit unsigned integer and a
+// 64-bit unsigned integer.
+inline uint64_t umul96_lower64(uint32_t x, uint64_t y) noexcept {
+ return x * y;
+}
+
+// Various fast log computations.
+inline int floor_log10_pow2_minus_log10_4_over_3(int e) noexcept {
+ FMT_ASSERT(e <= 2936 && e >= -2985, "too large exponent");
+ return (e * 631305 - 261663) >> 21;
+}
+
+FMT_INLINE_VARIABLE constexpr struct {
+ uint32_t divisor;
+ int shift_amount;
+} div_small_pow10_infos[] = {{10, 16}, {100, 16}};
+
+// Replaces n by floor(n / pow(10, N)) returning true if and only if n is
+// divisible by pow(10, N).
+// Precondition: n <= pow(10, N + 1).
+template <int N>
+bool check_divisibility_and_divide_by_pow10(uint32_t& n) noexcept {
+ // The numbers below are chosen such that:
+ // 1. floor(n/d) = floor(nm / 2^k) where d=10 or d=100,
+ // 2. nm mod 2^k < m if and only if n is divisible by d,
+ // where m is magic_number, k is shift_amount
+ // and d is divisor.
+ //
+ // Item 1 is a common technique of replacing division by a constant with
+ // multiplication, see e.g. "Division by Invariant Integers Using
+ // Multiplication" by Granlund and Montgomery (1994). magic_number (m) is set
+ // to ceil(2^k/d) for large enough k.
+ // The idea for item 2 originates from Schubfach.
+ constexpr auto info = div_small_pow10_infos[N - 1];
+ FMT_ASSERT(n <= info.divisor * 10, "n is too large");
+ constexpr uint32_t magic_number =
+ (1u << info.shift_amount) / info.divisor + 1;
+ n *= magic_number;
+ const uint32_t comparison_mask = (1u << info.shift_amount) - 1;
+ bool result = (n & comparison_mask) < magic_number;
+ n >>= info.shift_amount;
+ return result;
+}
+
+// Computes floor(n / pow(10, N)) for small n and N.
+// Precondition: n <= pow(10, N + 1).
+template <int N> uint32_t small_division_by_pow10(uint32_t n) noexcept {
+ constexpr auto info = div_small_pow10_infos[N - 1];
+ FMT_ASSERT(n <= info.divisor * 10, "n is too large");
+ constexpr uint32_t magic_number =
+ (1u << info.shift_amount) / info.divisor + 1;
+ return (n * magic_number) >> info.shift_amount;
+}
+
+// Computes floor(n / 10^(kappa + 1)) (float)
+inline uint32_t divide_by_10_to_kappa_plus_1(uint32_t n) noexcept {
+ // 1374389535 = ceil(2^37/100)
+ return static_cast<uint32_t>((static_cast<uint64_t>(n) * 1374389535) >> 37);
+}
+// Computes floor(n / 10^(kappa + 1)) (double)
+inline uint64_t divide_by_10_to_kappa_plus_1(uint64_t n) noexcept {
+ // 2361183241434822607 = ceil(2^(64+7)/1000)
+ return umul128_upper64(n, 2361183241434822607ull) >> 7;
+}
+
+// Various subroutines using pow10 cache
+template <typename T> struct cache_accessor;
+
+template <> struct cache_accessor<float> {
+ using carrier_uint = float_info<float>::carrier_uint;
+ using cache_entry_type = uint64_t;
+
+ static uint64_t get_cached_power(int k) noexcept {
+ FMT_ASSERT(k >= float_info<float>::min_k && k <= float_info<float>::max_k,
+ "k is out of range");
+ static constexpr const uint64_t pow10_significands[] = {
+ 0x81ceb32c4b43fcf5, 0xa2425ff75e14fc32, 0xcad2f7f5359a3b3f,
+ 0xfd87b5f28300ca0e, 0x9e74d1b791e07e49, 0xc612062576589ddb,
+ 0xf79687aed3eec552, 0x9abe14cd44753b53, 0xc16d9a0095928a28,
+ 0xf1c90080baf72cb2, 0x971da05074da7bef, 0xbce5086492111aeb,
+ 0xec1e4a7db69561a6, 0x9392ee8e921d5d08, 0xb877aa3236a4b44a,
+ 0xe69594bec44de15c, 0x901d7cf73ab0acda, 0xb424dc35095cd810,
+ 0xe12e13424bb40e14, 0x8cbccc096f5088cc, 0xafebff0bcb24aaff,
+ 0xdbe6fecebdedd5bf, 0x89705f4136b4a598, 0xabcc77118461cefd,
+ 0xd6bf94d5e57a42bd, 0x8637bd05af6c69b6, 0xa7c5ac471b478424,
+ 0xd1b71758e219652c, 0x83126e978d4fdf3c, 0xa3d70a3d70a3d70b,
+ 0xcccccccccccccccd, 0x8000000000000000, 0xa000000000000000,
+ 0xc800000000000000, 0xfa00000000000000, 0x9c40000000000000,
+ 0xc350000000000000, 0xf424000000000000, 0x9896800000000000,
+ 0xbebc200000000000, 0xee6b280000000000, 0x9502f90000000000,
+ 0xba43b74000000000, 0xe8d4a51000000000, 0x9184e72a00000000,
+ 0xb5e620f480000000, 0xe35fa931a0000000, 0x8e1bc9bf04000000,
+ 0xb1a2bc2ec5000000, 0xde0b6b3a76400000, 0x8ac7230489e80000,
+ 0xad78ebc5ac620000, 0xd8d726b7177a8000, 0x878678326eac9000,
+ 0xa968163f0a57b400, 0xd3c21bcecceda100, 0x84595161401484a0,
+ 0xa56fa5b99019a5c8, 0xcecb8f27f4200f3a, 0x813f3978f8940985,
+ 0xa18f07d736b90be6, 0xc9f2c9cd04674edf, 0xfc6f7c4045812297,
+ 0x9dc5ada82b70b59e, 0xc5371912364ce306, 0xf684df56c3e01bc7,
+ 0x9a130b963a6c115d, 0xc097ce7bc90715b4, 0xf0bdc21abb48db21,
+ 0x96769950b50d88f5, 0xbc143fa4e250eb32, 0xeb194f8e1ae525fe,
+ 0x92efd1b8d0cf37bf, 0xb7abc627050305ae, 0xe596b7b0c643c71a,
+ 0x8f7e32ce7bea5c70, 0xb35dbf821ae4f38c, 0xe0352f62a19e306f};
+ return pow10_significands[k - float_info<float>::min_k];
+ }
+
+ struct compute_mul_result {
+ carrier_uint result;
+ bool is_integer;
+ };
+ struct compute_mul_parity_result {
+ bool parity;
+ bool is_integer;
+ };
+
+ static compute_mul_result compute_mul(
+ carrier_uint u, const cache_entry_type& cache) noexcept {
+ auto r = umul96_upper64(u, cache);
+ return {static_cast<carrier_uint>(r >> 32),
+ static_cast<carrier_uint>(r) == 0};
+ }
+
+ static uint32_t compute_delta(const cache_entry_type& cache,
+ int beta) noexcept {
+ return static_cast<uint32_t>(cache >> (64 - 1 - beta));
+ }
+
+ static compute_mul_parity_result compute_mul_parity(
+ carrier_uint two_f, const cache_entry_type& cache, int beta) noexcept {
+ FMT_ASSERT(beta >= 1, "");
+ FMT_ASSERT(beta < 64, "");
+
+ auto r = umul96_lower64(two_f, cache);
+ return {((r >> (64 - beta)) & 1) != 0,
+ static_cast<uint32_t>(r >> (32 - beta)) == 0};
+ }
+
+ static carrier_uint compute_left_endpoint_for_shorter_interval_case(
+ const cache_entry_type& cache, int beta) noexcept {
+ return static_cast<carrier_uint>(
+ (cache - (cache >> (num_significand_bits<float>() + 2))) >>
+ (64 - num_significand_bits<float>() - 1 - beta));
+ }
+
+ static carrier_uint compute_right_endpoint_for_shorter_interval_case(
+ const cache_entry_type& cache, int beta) noexcept {
+ return static_cast<carrier_uint>(
+ (cache + (cache >> (num_significand_bits<float>() + 1))) >>
+ (64 - num_significand_bits<float>() - 1 - beta));
+ }
+
+ static carrier_uint compute_round_up_for_shorter_interval_case(
+ const cache_entry_type& cache, int beta) noexcept {
+ return (static_cast<carrier_uint>(
+ cache >> (64 - num_significand_bits<float>() - 2 - beta)) +
+ 1) /
+ 2;
+ }
+};
+
+template <> struct cache_accessor<double> {
+ using carrier_uint = float_info<double>::carrier_uint;
+ using cache_entry_type = uint128_fallback;
+
+ static uint128_fallback get_cached_power(int k) noexcept {
+ FMT_ASSERT(k >= float_info<double>::min_k && k <= float_info<double>::max_k,
+ "k is out of range");
+
+ static constexpr const uint128_fallback pow10_significands[] = {
+#if FMT_USE_FULL_CACHE_DRAGONBOX
+ {0xff77b1fcbebcdc4f, 0x25e8e89c13bb0f7b},
+ {0x9faacf3df73609b1, 0x77b191618c54e9ad},
+ {0xc795830d75038c1d, 0xd59df5b9ef6a2418},
+ {0xf97ae3d0d2446f25, 0x4b0573286b44ad1e},
+ {0x9becce62836ac577, 0x4ee367f9430aec33},
+ {0xc2e801fb244576d5, 0x229c41f793cda740},
+ {0xf3a20279ed56d48a, 0x6b43527578c11110},
+ {0x9845418c345644d6, 0x830a13896b78aaaa},
+ {0xbe5691ef416bd60c, 0x23cc986bc656d554},
+ {0xedec366b11c6cb8f, 0x2cbfbe86b7ec8aa9},
+ {0x94b3a202eb1c3f39, 0x7bf7d71432f3d6aa},
+ {0xb9e08a83a5e34f07, 0xdaf5ccd93fb0cc54},
+ {0xe858ad248f5c22c9, 0xd1b3400f8f9cff69},
+ {0x91376c36d99995be, 0x23100809b9c21fa2},
+ {0xb58547448ffffb2d, 0xabd40a0c2832a78b},
+ {0xe2e69915b3fff9f9, 0x16c90c8f323f516d},
+ {0x8dd01fad907ffc3b, 0xae3da7d97f6792e4},
+ {0xb1442798f49ffb4a, 0x99cd11cfdf41779d},
+ {0xdd95317f31c7fa1d, 0x40405643d711d584},
+ {0x8a7d3eef7f1cfc52, 0x482835ea666b2573},
+ {0xad1c8eab5ee43b66, 0xda3243650005eed0},
+ {0xd863b256369d4a40, 0x90bed43e40076a83},
+ {0x873e4f75e2224e68, 0x5a7744a6e804a292},
+ {0xa90de3535aaae202, 0x711515d0a205cb37},
+ {0xd3515c2831559a83, 0x0d5a5b44ca873e04},
+ {0x8412d9991ed58091, 0xe858790afe9486c3},
+ {0xa5178fff668ae0b6, 0x626e974dbe39a873},
+ {0xce5d73ff402d98e3, 0xfb0a3d212dc81290},
+ {0x80fa687f881c7f8e, 0x7ce66634bc9d0b9a},
+ {0xa139029f6a239f72, 0x1c1fffc1ebc44e81},
+ {0xc987434744ac874e, 0xa327ffb266b56221},
+ {0xfbe9141915d7a922, 0x4bf1ff9f0062baa9},
+ {0x9d71ac8fada6c9b5, 0x6f773fc3603db4aa},
+ {0xc4ce17b399107c22, 0xcb550fb4384d21d4},
+ {0xf6019da07f549b2b, 0x7e2a53a146606a49},
+ {0x99c102844f94e0fb, 0x2eda7444cbfc426e},
+ {0xc0314325637a1939, 0xfa911155fefb5309},
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+ {0xca5e89b18b602368, 0x385bb19cb14bdfc5},
+ {0xfcf62c1dee382c42, 0x46729e03dd9ed7b6},
+ {0x9e19db92b4e31ba9, 0x6c07a2c26a8346d2},
+ {0xc5a05277621be293, 0xc7098b7305241886},
+ {0xf70867153aa2db38, 0xb8cbee4fc66d1ea8},
+ {0x9a65406d44a5c903, 0x737f74f1dc043329},
+ {0xc0fe908895cf3b44, 0x505f522e53053ff3},
+ {0xf13e34aabb430a15, 0x647726b9e7c68ff0},
+ {0x96c6e0eab509e64d, 0x5eca783430dc19f6},
+ {0xbc789925624c5fe0, 0xb67d16413d132073},
+ {0xeb96bf6ebadf77d8, 0xe41c5bd18c57e890},
+ {0x933e37a534cbaae7, 0x8e91b962f7b6f15a},
+ {0xb80dc58e81fe95a1, 0x723627bbb5a4adb1},
+ {0xe61136f2227e3b09, 0xcec3b1aaa30dd91d},
+ {0x8fcac257558ee4e6, 0x213a4f0aa5e8a7b2},
+ {0xb3bd72ed2af29e1f, 0xa988e2cd4f62d19e},
+ {0xe0accfa875af45a7, 0x93eb1b80a33b8606},
+ {0x8c6c01c9498d8b88, 0xbc72f130660533c4},
+ {0xaf87023b9bf0ee6a, 0xeb8fad7c7f8680b5},
+ { 0xdb68c2ca82ed2a05,
+ 0xa67398db9f6820e2 }
+#else
+ {0xff77b1fcbebcdc4f, 0x25e8e89c13bb0f7b},
+ {0xce5d73ff402d98e3, 0xfb0a3d212dc81290},
+ {0xa6b34ad8c9dfc06f, 0xf42faa48c0ea481f},
+ {0x86a8d39ef77164bc, 0xae5dff9c02033198},
+ {0xd98ddaee19068c76, 0x3badd624dd9b0958},
+ {0xafbd2350644eeacf, 0xe5d1929ef90898fb},
+ {0x8df5efabc5979c8f, 0xca8d3ffa1ef463c2},
+ {0xe55990879ddcaabd, 0xcc420a6a101d0516},
+ {0xb94470938fa89bce, 0xf808e40e8d5b3e6a},
+ {0x95a8637627989aad, 0xdde7001379a44aa9},
+ {0xf1c90080baf72cb1, 0x5324c68b12dd6339},
+ {0xc350000000000000, 0x0000000000000000},
+ {0x9dc5ada82b70b59d, 0xf020000000000000},
+ {0xfee50b7025c36a08, 0x02f236d04753d5b5},
+ {0xcde6fd5e09abcf26, 0xed4c0226b55e6f87},
+ {0xa6539930bf6bff45, 0x84db8346b786151d},
+ {0x865b86925b9bc5c2, 0x0b8a2392ba45a9b3},
+ {0xd910f7ff28069da4, 0x1b2ba1518094da05},
+ {0xaf58416654a6babb, 0x387ac8d1970027b3},
+ {0x8da471a9de737e24, 0x5ceaecfed289e5d3},
+ {0xe4d5e82392a40515, 0x0fabaf3feaa5334b},
+ {0xb8da1662e7b00a17, 0x3d6a751f3b936244},
+ {0x95527a5202df0ccb, 0x0f37801e0c43ebc9},
+ {0xf13e34aabb430a15, 0x647726b9e7c68ff0}
+#endif
+ };
+
+#if FMT_USE_FULL_CACHE_DRAGONBOX
+ return pow10_significands[k - float_info<double>::min_k];
+#else
+ static constexpr const uint64_t powers_of_5_64[] = {
+ 0x0000000000000001, 0x0000000000000005, 0x0000000000000019,
+ 0x000000000000007d, 0x0000000000000271, 0x0000000000000c35,
+ 0x0000000000003d09, 0x000000000001312d, 0x000000000005f5e1,
+ 0x00000000001dcd65, 0x00000000009502f9, 0x0000000002e90edd,
+ 0x000000000e8d4a51, 0x0000000048c27395, 0x000000016bcc41e9,
+ 0x000000071afd498d, 0x0000002386f26fc1, 0x000000b1a2bc2ec5,
+ 0x000003782dace9d9, 0x00001158e460913d, 0x000056bc75e2d631,
+ 0x0001b1ae4d6e2ef5, 0x000878678326eac9, 0x002a5a058fc295ed,
+ 0x00d3c21bcecceda1, 0x0422ca8b0a00a425, 0x14adf4b7320334b9};
+
+ static const int compression_ratio = 27;
+
+ // Compute base index.
+ int cache_index = (k - float_info<double>::min_k) / compression_ratio;
+ int kb = cache_index * compression_ratio + float_info<double>::min_k;
+ int offset = k - kb;
+
+ // Get base cache.
+ uint128_fallback base_cache = pow10_significands[cache_index];
+ if (offset == 0) return base_cache;
+
+ // Compute the required amount of bit-shift.
+ int alpha = floor_log2_pow10(kb + offset) - floor_log2_pow10(kb) - offset;
+ FMT_ASSERT(alpha > 0 && alpha < 64, "shifting error detected");
+
+ // Try to recover the real cache.
+ uint64_t pow5 = powers_of_5_64[offset];
+ uint128_fallback recovered_cache = umul128(base_cache.high(), pow5);
+ uint128_fallback middle_low = umul128(base_cache.low(), pow5);
+
+ recovered_cache += middle_low.high();
+
+ uint64_t high_to_middle = recovered_cache.high() << (64 - alpha);
+ uint64_t middle_to_low = recovered_cache.low() << (64 - alpha);
+
+ recovered_cache =
+ uint128_fallback{(recovered_cache.low() >> alpha) | high_to_middle,
+ ((middle_low.low() >> alpha) | middle_to_low)};
+ FMT_ASSERT(recovered_cache.low() + 1 != 0, "");
+ return {recovered_cache.high(), recovered_cache.low() + 1};
+#endif
+ }
+
+ struct compute_mul_result {
+ carrier_uint result;
+ bool is_integer;
+ };
+ struct compute_mul_parity_result {
+ bool parity;
+ bool is_integer;
+ };
+
+ static compute_mul_result compute_mul(
+ carrier_uint u, const cache_entry_type& cache) noexcept {
+ auto r = umul192_upper128(u, cache);
+ return {r.high(), r.low() == 0};
+ }
+
+ static uint32_t compute_delta(cache_entry_type const& cache,
+ int beta) noexcept {
+ return static_cast<uint32_t>(cache.high() >> (64 - 1 - beta));
+ }
+
+ static compute_mul_parity_result compute_mul_parity(
+ carrier_uint two_f, const cache_entry_type& cache, int beta) noexcept {
+ FMT_ASSERT(beta >= 1, "");
+ FMT_ASSERT(beta < 64, "");
+
+ auto r = umul192_lower128(two_f, cache);
+ return {((r.high() >> (64 - beta)) & 1) != 0,
+ ((r.high() << beta) | (r.low() >> (64 - beta))) == 0};
+ }
+
+ static carrier_uint compute_left_endpoint_for_shorter_interval_case(
+ const cache_entry_type& cache, int beta) noexcept {
+ return (cache.high() -
+ (cache.high() >> (num_significand_bits<double>() + 2))) >>
+ (64 - num_significand_bits<double>() - 1 - beta);
+ }
+
+ static carrier_uint compute_right_endpoint_for_shorter_interval_case(
+ const cache_entry_type& cache, int beta) noexcept {
+ return (cache.high() +
+ (cache.high() >> (num_significand_bits<double>() + 1))) >>
+ (64 - num_significand_bits<double>() - 1 - beta);
+ }
+
+ static carrier_uint compute_round_up_for_shorter_interval_case(
+ const cache_entry_type& cache, int beta) noexcept {
+ return ((cache.high() >> (64 - num_significand_bits<double>() - 2 - beta)) +
+ 1) /
+ 2;
+ }
+};
+
+FMT_FUNC uint128_fallback get_cached_power(int k) noexcept {
+ return cache_accessor<double>::get_cached_power(k);
+}
+
+// Various integer checks
+template <typename T>
+bool is_left_endpoint_integer_shorter_interval(int exponent) noexcept {
+ const int case_shorter_interval_left_endpoint_lower_threshold = 2;
+ const int case_shorter_interval_left_endpoint_upper_threshold = 3;
+ return exponent >= case_shorter_interval_left_endpoint_lower_threshold &&
+ exponent <= case_shorter_interval_left_endpoint_upper_threshold;
+}
+
+// Remove trailing zeros from n and return the number of zeros removed (float)
+FMT_INLINE int remove_trailing_zeros(uint32_t& n) noexcept {
+ FMT_ASSERT(n != 0, "");
+ // Modular inverse of 5 (mod 2^32): (mod_inv_5 * 5) mod 2^32 = 1.
+ // See https://github.com/fmtlib/fmt/issues/3163 for more details.
+ const uint32_t mod_inv_5 = 0xcccccccd;
+ // Casts are needed to workaround a bug in MSVC 19.22 and older.
+ const uint32_t mod_inv_25 =
+ static_cast<uint32_t>(uint64_t(mod_inv_5) * mod_inv_5);
+
+ int s = 0;
+ while (true) {
+ auto q = rotr(n * mod_inv_25, 2);
+ if (q > max_value<uint32_t>() / 100) break;
+ n = q;
+ s += 2;
+ }
+ auto q = rotr(n * mod_inv_5, 1);
+ if (q <= max_value<uint32_t>() / 10) {
+ n = q;
+ s |= 1;
+ }
+ return s;
+}
+
+// Removes trailing zeros and returns the number of zeros removed (double)
+FMT_INLINE int remove_trailing_zeros(uint64_t& n) noexcept {
+ FMT_ASSERT(n != 0, "");
+
+ // This magic number is ceil(2^90 / 10^8).
+ constexpr uint64_t magic_number = 12379400392853802749ull;
+ auto nm = umul128(n, magic_number);
+
+ // Is n is divisible by 10^8?
+ if ((nm.high() & ((1ull << (90 - 64)) - 1)) == 0 && nm.low() < magic_number) {
+ // If yes, work with the quotient.
+ auto n32 = static_cast<uint32_t>(nm.high() >> (90 - 64));
+
+ const uint32_t mod_inv_5 = 0xcccccccd;
+ const uint32_t mod_inv_25 = mod_inv_5 * mod_inv_5;
+
+ int s = 8;
+ while (true) {
+ auto q = rotr(n32 * mod_inv_25, 2);
+ if (q > max_value<uint32_t>() / 100) break;
+ n32 = q;
+ s += 2;
+ }
+ auto q = rotr(n32 * mod_inv_5, 1);
+ if (q <= max_value<uint32_t>() / 10) {
+ n32 = q;
+ s |= 1;
+ }
+
+ n = n32;
+ return s;
+ }
+
+ // If n is not divisible by 10^8, work with n itself.
+ const uint64_t mod_inv_5 = 0xcccccccccccccccd;
+ const uint64_t mod_inv_25 = mod_inv_5 * mod_inv_5;
+
+ int s = 0;
+ while (true) {
+ auto q = rotr(n * mod_inv_25, 2);
+ if (q > max_value<uint64_t>() / 100) break;
+ n = q;
+ s += 2;
+ }
+ auto q = rotr(n * mod_inv_5, 1);
+ if (q <= max_value<uint64_t>() / 10) {
+ n = q;
+ s |= 1;
+ }
+
+ return s;
+}
+
+// The main algorithm for shorter interval case
+template <typename T>
+FMT_INLINE decimal_fp<T> shorter_interval_case(int exponent) noexcept {
+ decimal_fp<T> ret_value;
+ // Compute k and beta
+ const int minus_k = floor_log10_pow2_minus_log10_4_over_3(exponent);
+ const int beta = exponent + floor_log2_pow10(-minus_k);
+
+ // Compute xi and zi
+ using cache_entry_type = typename cache_accessor<T>::cache_entry_type;
+ const cache_entry_type cache = cache_accessor<T>::get_cached_power(-minus_k);
+
+ auto xi = cache_accessor<T>::compute_left_endpoint_for_shorter_interval_case(
+ cache, beta);
+ auto zi = cache_accessor<T>::compute_right_endpoint_for_shorter_interval_case(
+ cache, beta);
+
+ // If the left endpoint is not an integer, increase it
+ if (!is_left_endpoint_integer_shorter_interval<T>(exponent)) ++xi;
+
+ // Try bigger divisor
+ ret_value.significand = zi / 10;
+
+ // If succeed, remove trailing zeros if necessary and return
+ if (ret_value.significand * 10 >= xi) {
+ ret_value.exponent = minus_k + 1;
+ ret_value.exponent += remove_trailing_zeros(ret_value.significand);
+ return ret_value;
+ }
+
+ // Otherwise, compute the round-up of y
+ ret_value.significand =
+ cache_accessor<T>::compute_round_up_for_shorter_interval_case(cache,
+ beta);
+ ret_value.exponent = minus_k;
+
+ // When tie occurs, choose one of them according to the rule
+ if (exponent >= float_info<T>::shorter_interval_tie_lower_threshold &&
+ exponent <= float_info<T>::shorter_interval_tie_upper_threshold) {
+ ret_value.significand = ret_value.significand % 2 == 0
+ ? ret_value.significand
+ : ret_value.significand - 1;
+ } else if (ret_value.significand < xi) {
+ ++ret_value.significand;
+ }
+ return ret_value;
+}
+
+template <typename T> decimal_fp<T> to_decimal(T x) noexcept {
+ // Step 1: integer promotion & Schubfach multiplier calculation.
+
+ using carrier_uint = typename float_info<T>::carrier_uint;
+ using cache_entry_type = typename cache_accessor<T>::cache_entry_type;
+ auto br = bit_cast<carrier_uint>(x);
+
+ // Extract significand bits and exponent bits.
+ const carrier_uint significand_mask =
+ (static_cast<carrier_uint>(1) << num_significand_bits<T>()) - 1;
+ carrier_uint significand = (br & significand_mask);
+ int exponent =
+ static_cast<int>((br & exponent_mask<T>()) >> num_significand_bits<T>());
+
+ if (exponent != 0) { // Check if normal.
+ exponent -= exponent_bias<T>() + num_significand_bits<T>();
+
+ // Shorter interval case; proceed like Schubfach.
+ // In fact, when exponent == 1 and significand == 0, the interval is
+ // regular. However, it can be shown that the end-results are anyway same.
+ if (significand == 0) return shorter_interval_case<T>(exponent);
+
+ significand |= (static_cast<carrier_uint>(1) << num_significand_bits<T>());
+ } else {
+ // Subnormal case; the interval is always regular.
+ if (significand == 0) return {0, 0};
+ exponent =
+ std::numeric_limits<T>::min_exponent - num_significand_bits<T>() - 1;
+ }
+
+ const bool include_left_endpoint = (significand % 2 == 0);
+ const bool include_right_endpoint = include_left_endpoint;
+
+ // Compute k and beta.
+ const int minus_k = floor_log10_pow2(exponent) - float_info<T>::kappa;
+ const cache_entry_type cache = cache_accessor<T>::get_cached_power(-minus_k);
+ const int beta = exponent + floor_log2_pow10(-minus_k);
+
+ // Compute zi and deltai.
+ // 10^kappa <= deltai < 10^(kappa + 1)
+ const uint32_t deltai = cache_accessor<T>::compute_delta(cache, beta);
+ const carrier_uint two_fc = significand << 1;
+
+ // For the case of binary32, the result of integer check is not correct for
+ // 29711844 * 2^-82
+ // = 6.1442653300000000008655037797566933477355632930994033813476... * 10^-18
+ // and 29711844 * 2^-81
+ // = 1.2288530660000000001731007559513386695471126586198806762695... * 10^-17,
+ // and they are the unique counterexamples. However, since 29711844 is even,
+ // this does not cause any problem for the endpoints calculations; it can only
+ // cause a problem when we need to perform integer check for the center.
+ // Fortunately, with these inputs, that branch is never executed, so we are
+ // fine.
+ const typename cache_accessor<T>::compute_mul_result z_mul =
+ cache_accessor<T>::compute_mul((two_fc | 1) << beta, cache);
+
+ // Step 2: Try larger divisor; remove trailing zeros if necessary.
+
+ // Using an upper bound on zi, we might be able to optimize the division
+ // better than the compiler; we are computing zi / big_divisor here.
+ decimal_fp<T> ret_value;
+ ret_value.significand = divide_by_10_to_kappa_plus_1(z_mul.result);
+ uint32_t r = static_cast<uint32_t>(z_mul.result - float_info<T>::big_divisor *
+ ret_value.significand);
+
+ if (r < deltai) {
+ // Exclude the right endpoint if necessary.
+ if (r == 0 && (z_mul.is_integer & !include_right_endpoint)) {
+ --ret_value.significand;
+ r = float_info<T>::big_divisor;
+ goto small_divisor_case_label;
+ }
+ } else if (r > deltai) {
+ goto small_divisor_case_label;
+ } else {
+ // r == deltai; compare fractional parts.
+ const typename cache_accessor<T>::compute_mul_parity_result x_mul =
+ cache_accessor<T>::compute_mul_parity(two_fc - 1, cache, beta);
+
+ if (!(x_mul.parity | (x_mul.is_integer & include_left_endpoint)))
+ goto small_divisor_case_label;
+ }
+ ret_value.exponent = minus_k + float_info<T>::kappa + 1;
+
+ // We may need to remove trailing zeros.
+ ret_value.exponent += remove_trailing_zeros(ret_value.significand);
+ return ret_value;
+
+ // Step 3: Find the significand with the smaller divisor.
+
+small_divisor_case_label:
+ ret_value.significand *= 10;
+ ret_value.exponent = minus_k + float_info<T>::kappa;
+
+ uint32_t dist = r - (deltai / 2) + (float_info<T>::small_divisor / 2);
+ const bool approx_y_parity =
+ ((dist ^ (float_info<T>::small_divisor / 2)) & 1) != 0;
+
+ // Is dist divisible by 10^kappa?
+ const bool divisible_by_small_divisor =
+ check_divisibility_and_divide_by_pow10<float_info<T>::kappa>(dist);
+
+ // Add dist / 10^kappa to the significand.
+ ret_value.significand += dist;
+
+ if (!divisible_by_small_divisor) return ret_value;
+
+ // Check z^(f) >= epsilon^(f).
+ // We have either yi == zi - epsiloni or yi == (zi - epsiloni) - 1,
+ // where yi == zi - epsiloni if and only if z^(f) >= epsilon^(f).
+ // Since there are only 2 possibilities, we only need to care about the
+ // parity. Also, zi and r should have the same parity since the divisor
+ // is an even number.
+ const auto y_mul = cache_accessor<T>::compute_mul_parity(two_fc, cache, beta);
+
+ // If z^(f) >= epsilon^(f), we might have a tie when z^(f) == epsilon^(f),
+ // or equivalently, when y is an integer.
+ if (y_mul.parity != approx_y_parity)
+ --ret_value.significand;
+ else if (y_mul.is_integer & (ret_value.significand % 2 != 0))
+ --ret_value.significand;
+ return ret_value;
+}
+} // namespace dragonbox
+} // namespace detail
+
+template <> struct formatter<detail::bigint> {
+ FMT_CONSTEXPR auto parse(format_parse_context& ctx)
+ -> format_parse_context::iterator {
+ return ctx.begin();
+ }
+
+ auto format(const detail::bigint& n, format_context& ctx) const
+ -> format_context::iterator {
+ auto out = ctx.out();
+ bool first = true;
+ for (auto i = n.bigits_.size(); i > 0; --i) {
+ auto value = n.bigits_[i - 1u];
+ if (first) {
+ out = format_to(out, FMT_STRING("{:x}"), value);
+ first = false;
+ continue;
+ }
+ out = format_to(out, FMT_STRING("{:08x}"), value);
+ }
+ if (n.exp_ > 0)
+ out = format_to(out, FMT_STRING("p{}"),
+ n.exp_ * detail::bigint::bigit_bits);
+ return out;
+ }
+};
+
+FMT_FUNC detail::utf8_to_utf16::utf8_to_utf16(string_view s) {
+ for_each_codepoint(s, [this](uint32_t cp, string_view) {
+ if (cp == invalid_code_point) FMT_THROW(std::runtime_error("invalid utf8"));
+ if (cp <= 0xFFFF) {
+ buffer_.push_back(static_cast<wchar_t>(cp));
+ } else {
+ cp -= 0x10000;
+ buffer_.push_back(static_cast<wchar_t>(0xD800 + (cp >> 10)));
+ buffer_.push_back(static_cast<wchar_t>(0xDC00 + (cp & 0x3FF)));
+ }
+ return true;
+ });
+ buffer_.push_back(0);
+}
+
+FMT_FUNC void format_system_error(detail::buffer<char>& out, int error_code,
+ const char* message) noexcept {
+ FMT_TRY {
+ auto ec = std::error_code(error_code, std::generic_category());
+ write(std::back_inserter(out), std::system_error(ec, message).what());
+ return;
+ }
+ FMT_CATCH(...) {}
+ format_error_code(out, error_code, message);
+}
+
+FMT_FUNC void report_system_error(int error_code,
+ const char* message) noexcept {
+ report_error(format_system_error, error_code, message);
+}
+
+FMT_FUNC std::string vformat(string_view fmt, format_args args) {
+ // Don't optimize the "{}" case to keep the binary size small and because it
+ // can be better optimized in fmt::format anyway.
+ auto buffer = memory_buffer();
+ detail::vformat_to(buffer, fmt, args);
+ return to_string(buffer);
+}
+
+namespace detail {
+#ifndef _WIN32
+FMT_FUNC bool write_console(std::FILE*, string_view) { return false; }
+#else
+using dword = conditional_t<sizeof(long) == 4, unsigned long, unsigned>;
+extern "C" __declspec(dllimport) int __stdcall WriteConsoleW( //
+ void*, const void*, dword, dword*, void*);
+
+FMT_FUNC bool write_console(std::FILE* f, string_view text) {
+ auto fd = _fileno(f);
+ if (!_isatty(fd)) return false;
+ auto u16 = utf8_to_utf16(text);
+ auto written = dword();
+ return WriteConsoleW(reinterpret_cast<void*>(_get_osfhandle(fd)), u16.c_str(),
+ static_cast<uint32_t>(u16.size()), &written, nullptr);
+}
+
+// Print assuming legacy (non-Unicode) encoding.
+FMT_FUNC void vprint_mojibake(std::FILE* f, string_view fmt, format_args args) {
+ auto buffer = memory_buffer();
+ detail::vformat_to(buffer, fmt,
+ basic_format_args<buffer_context<char>>(args));
+ fwrite_fully(buffer.data(), 1, buffer.size(), f);
+}
+#endif
+
+FMT_FUNC void print(std::FILE* f, string_view text) {
+ if (!write_console(f, text)) fwrite_fully(text.data(), 1, text.size(), f);
+}
+} // namespace detail
+
+FMT_FUNC void vprint(std::FILE* f, string_view fmt, format_args args) {
+ auto buffer = memory_buffer();
+ detail::vformat_to(buffer, fmt, args);
+ detail::print(f, {buffer.data(), buffer.size()});
+}
+
+FMT_FUNC void vprint(string_view fmt, format_args args) {
+ vprint(stdout, fmt, args);
+}
+
+namespace detail {
+
+struct singleton {
+ unsigned char upper;
+ unsigned char lower_count;
+};
+
+inline auto is_printable(uint16_t x, const singleton* singletons,
+ size_t singletons_size,
+ const unsigned char* singleton_lowers,
+ const unsigned char* normal, size_t normal_size)
+ -> bool {
+ auto upper = x >> 8;
+ auto lower_start = 0;
+ for (size_t i = 0; i < singletons_size; ++i) {
+ auto s = singletons[i];
+ auto lower_end = lower_start + s.lower_count;
+ if (upper < s.upper) break;
+ if (upper == s.upper) {
+ for (auto j = lower_start; j < lower_end; ++j) {
+ if (singleton_lowers[j] == (x & 0xff)) return false;
+ }
+ }
+ lower_start = lower_end;
+ }
+
+ auto xsigned = static_cast<int>(x);
+ auto current = true;
+ for (size_t i = 0; i < normal_size; ++i) {
+ auto v = static_cast<int>(normal[i]);
+ auto len = (v & 0x80) != 0 ? (v & 0x7f) << 8 | normal[++i] : v;
+ xsigned -= len;
+ if (xsigned < 0) break;
+ current = !current;
+ }
+ return current;
+}
+
+// This code is generated by support/printable.py.
+FMT_FUNC auto is_printable(uint32_t cp) -> bool {
+ static constexpr singleton singletons0[] = {
+ {0x00, 1}, {0x03, 5}, {0x05, 6}, {0x06, 3}, {0x07, 6}, {0x08, 8},
+ {0x09, 17}, {0x0a, 28}, {0x0b, 25}, {0x0c, 20}, {0x0d, 16}, {0x0e, 13},
+ {0x0f, 4}, {0x10, 3}, {0x12, 18}, {0x13, 9}, {0x16, 1}, {0x17, 5},
+ {0x18, 2}, {0x19, 3}, {0x1a, 7}, {0x1c, 2}, {0x1d, 1}, {0x1f, 22},
+ {0x20, 3}, {0x2b, 3}, {0x2c, 2}, {0x2d, 11}, {0x2e, 1}, {0x30, 3},
+ {0x31, 2}, {0x32, 1}, {0xa7, 2}, {0xa9, 2}, {0xaa, 4}, {0xab, 8},
+ {0xfa, 2}, {0xfb, 5}, {0xfd, 4}, {0xfe, 3}, {0xff, 9},
+ };
+ static constexpr unsigned char singletons0_lower[] = {
+ 0xad, 0x78, 0x79, 0x8b, 0x8d, 0xa2, 0x30, 0x57, 0x58, 0x8b, 0x8c, 0x90,
+ 0x1c, 0x1d, 0xdd, 0x0e, 0x0f, 0x4b, 0x4c, 0xfb, 0xfc, 0x2e, 0x2f, 0x3f,
+ 0x5c, 0x5d, 0x5f, 0xb5, 0xe2, 0x84, 0x8d, 0x8e, 0x91, 0x92, 0xa9, 0xb1,
+ 0xba, 0xbb, 0xc5, 0xc6, 0xc9, 0xca, 0xde, 0xe4, 0xe5, 0xff, 0x00, 0x04,
+ 0x11, 0x12, 0x29, 0x31, 0x34, 0x37, 0x3a, 0x3b, 0x3d, 0x49, 0x4a, 0x5d,
+ 0x84, 0x8e, 0x92, 0xa9, 0xb1, 0xb4, 0xba, 0xbb, 0xc6, 0xca, 0xce, 0xcf,
+ 0xe4, 0xe5, 0x00, 0x04, 0x0d, 0x0e, 0x11, 0x12, 0x29, 0x31, 0x34, 0x3a,
+ 0x3b, 0x45, 0x46, 0x49, 0x4a, 0x5e, 0x64, 0x65, 0x84, 0x91, 0x9b, 0x9d,
+ 0xc9, 0xce, 0xcf, 0x0d, 0x11, 0x29, 0x45, 0x49, 0x57, 0x64, 0x65, 0x8d,
+ 0x91, 0xa9, 0xb4, 0xba, 0xbb, 0xc5, 0xc9, 0xdf, 0xe4, 0xe5, 0xf0, 0x0d,
+ 0x11, 0x45, 0x49, 0x64, 0x65, 0x80, 0x84, 0xb2, 0xbc, 0xbe, 0xbf, 0xd5,
+ 0xd7, 0xf0, 0xf1, 0x83, 0x85, 0x8b, 0xa4, 0xa6, 0xbe, 0xbf, 0xc5, 0xc7,
+ 0xce, 0xcf, 0xda, 0xdb, 0x48, 0x98, 0xbd, 0xcd, 0xc6, 0xce, 0xcf, 0x49,
+ 0x4e, 0x4f, 0x57, 0x59, 0x5e, 0x5f, 0x89, 0x8e, 0x8f, 0xb1, 0xb6, 0xb7,
+ 0xbf, 0xc1, 0xc6, 0xc7, 0xd7, 0x11, 0x16, 0x17, 0x5b, 0x5c, 0xf6, 0xf7,
+ 0xfe, 0xff, 0x80, 0x0d, 0x6d, 0x71, 0xde, 0xdf, 0x0e, 0x0f, 0x1f, 0x6e,
+ 0x6f, 0x1c, 0x1d, 0x5f, 0x7d, 0x7e, 0xae, 0xaf, 0xbb, 0xbc, 0xfa, 0x16,
+ 0x17, 0x1e, 0x1f, 0x46, 0x47, 0x4e, 0x4f, 0x58, 0x5a, 0x5c, 0x5e, 0x7e,
+ 0x7f, 0xb5, 0xc5, 0xd4, 0xd5, 0xdc, 0xf0, 0xf1, 0xf5, 0x72, 0x73, 0x8f,
+ 0x74, 0x75, 0x96, 0x2f, 0x5f, 0x26, 0x2e, 0x2f, 0xa7, 0xaf, 0xb7, 0xbf,
+ 0xc7, 0xcf, 0xd7, 0xdf, 0x9a, 0x40, 0x97, 0x98, 0x30, 0x8f, 0x1f, 0xc0,
+ 0xc1, 0xce, 0xff, 0x4e, 0x4f, 0x5a, 0x5b, 0x07, 0x08, 0x0f, 0x10, 0x27,
+ 0x2f, 0xee, 0xef, 0x6e, 0x6f, 0x37, 0x3d, 0x3f, 0x42, 0x45, 0x90, 0x91,
+ 0xfe, 0xff, 0x53, 0x67, 0x75, 0xc8, 0xc9, 0xd0, 0xd1, 0xd8, 0xd9, 0xe7,
+ 0xfe, 0xff,
+ };
+ static constexpr singleton singletons1[] = {
+ {0x00, 6}, {0x01, 1}, {0x03, 1}, {0x04, 2}, {0x08, 8}, {0x09, 2},
+ {0x0a, 5}, {0x0b, 2}, {0x0e, 4}, {0x10, 1}, {0x11, 2}, {0x12, 5},
+ {0x13, 17}, {0x14, 1}, {0x15, 2}, {0x17, 2}, {0x19, 13}, {0x1c, 5},
+ {0x1d, 8}, {0x24, 1}, {0x6a, 3}, {0x6b, 2}, {0xbc, 2}, {0xd1, 2},
+ {0xd4, 12}, {0xd5, 9}, {0xd6, 2}, {0xd7, 2}, {0xda, 1}, {0xe0, 5},
+ {0xe1, 2}, {0xe8, 2}, {0xee, 32}, {0xf0, 4}, {0xf8, 2}, {0xf9, 2},
+ {0xfa, 2}, {0xfb, 1},
+ };
+ static constexpr unsigned char singletons1_lower[] = {
+ 0x0c, 0x27, 0x3b, 0x3e, 0x4e, 0x4f, 0x8f, 0x9e, 0x9e, 0x9f, 0x06, 0x07,
+ 0x09, 0x36, 0x3d, 0x3e, 0x56, 0xf3, 0xd0, 0xd1, 0x04, 0x14, 0x18, 0x36,
+ 0x37, 0x56, 0x57, 0x7f, 0xaa, 0xae, 0xaf, 0xbd, 0x35, 0xe0, 0x12, 0x87,
+ 0x89, 0x8e, 0x9e, 0x04, 0x0d, 0x0e, 0x11, 0x12, 0x29, 0x31, 0x34, 0x3a,
+ 0x45, 0x46, 0x49, 0x4a, 0x4e, 0x4f, 0x64, 0x65, 0x5c, 0xb6, 0xb7, 0x1b,
+ 0x1c, 0x07, 0x08, 0x0a, 0x0b, 0x14, 0x17, 0x36, 0x39, 0x3a, 0xa8, 0xa9,
+ 0xd8, 0xd9, 0x09, 0x37, 0x90, 0x91, 0xa8, 0x07, 0x0a, 0x3b, 0x3e, 0x66,
+ 0x69, 0x8f, 0x92, 0x6f, 0x5f, 0xee, 0xef, 0x5a, 0x62, 0x9a, 0x9b, 0x27,
+ 0x28, 0x55, 0x9d, 0xa0, 0xa1, 0xa3, 0xa4, 0xa7, 0xa8, 0xad, 0xba, 0xbc,
+ 0xc4, 0x06, 0x0b, 0x0c, 0x15, 0x1d, 0x3a, 0x3f, 0x45, 0x51, 0xa6, 0xa7,
+ 0xcc, 0xcd, 0xa0, 0x07, 0x19, 0x1a, 0x22, 0x25, 0x3e, 0x3f, 0xc5, 0xc6,
+ 0x04, 0x20, 0x23, 0x25, 0x26, 0x28, 0x33, 0x38, 0x3a, 0x48, 0x4a, 0x4c,
+ 0x50, 0x53, 0x55, 0x56, 0x58, 0x5a, 0x5c, 0x5e, 0x60, 0x63, 0x65, 0x66,
+ 0x6b, 0x73, 0x78, 0x7d, 0x7f, 0x8a, 0xa4, 0xaa, 0xaf, 0xb0, 0xc0, 0xd0,
+ 0xae, 0xaf, 0x79, 0xcc, 0x6e, 0x6f, 0x93,
+ };
+ static constexpr unsigned char normal0[] = {
+ 0x00, 0x20, 0x5f, 0x22, 0x82, 0xdf, 0x04, 0x82, 0x44, 0x08, 0x1b, 0x04,
+ 0x06, 0x11, 0x81, 0xac, 0x0e, 0x80, 0xab, 0x35, 0x28, 0x0b, 0x80, 0xe0,
+ 0x03, 0x19, 0x08, 0x01, 0x04, 0x2f, 0x04, 0x34, 0x04, 0x07, 0x03, 0x01,
+ 0x07, 0x06, 0x07, 0x11, 0x0a, 0x50, 0x0f, 0x12, 0x07, 0x55, 0x07, 0x03,
+ 0x04, 0x1c, 0x0a, 0x09, 0x03, 0x08, 0x03, 0x07, 0x03, 0x02, 0x03, 0x03,
+ 0x03, 0x0c, 0x04, 0x05, 0x03, 0x0b, 0x06, 0x01, 0x0e, 0x15, 0x05, 0x3a,
+ 0x03, 0x11, 0x07, 0x06, 0x05, 0x10, 0x07, 0x57, 0x07, 0x02, 0x07, 0x15,
+ 0x0d, 0x50, 0x04, 0x43, 0x03, 0x2d, 0x03, 0x01, 0x04, 0x11, 0x06, 0x0f,
+ 0x0c, 0x3a, 0x04, 0x1d, 0x25, 0x5f, 0x20, 0x6d, 0x04, 0x6a, 0x25, 0x80,
+ 0xc8, 0x05, 0x82, 0xb0, 0x03, 0x1a, 0x06, 0x82, 0xfd, 0x03, 0x59, 0x07,
+ 0x15, 0x0b, 0x17, 0x09, 0x14, 0x0c, 0x14, 0x0c, 0x6a, 0x06, 0x0a, 0x06,
+ 0x1a, 0x06, 0x59, 0x07, 0x2b, 0x05, 0x46, 0x0a, 0x2c, 0x04, 0x0c, 0x04,
+ 0x01, 0x03, 0x31, 0x0b, 0x2c, 0x04, 0x1a, 0x06, 0x0b, 0x03, 0x80, 0xac,
+ 0x06, 0x0a, 0x06, 0x21, 0x3f, 0x4c, 0x04, 0x2d, 0x03, 0x74, 0x08, 0x3c,
+ 0x03, 0x0f, 0x03, 0x3c, 0x07, 0x38, 0x08, 0x2b, 0x05, 0x82, 0xff, 0x11,
+ 0x18, 0x08, 0x2f, 0x11, 0x2d, 0x03, 0x20, 0x10, 0x21, 0x0f, 0x80, 0x8c,
+ 0x04, 0x82, 0x97, 0x19, 0x0b, 0x15, 0x88, 0x94, 0x05, 0x2f, 0x05, 0x3b,
+ 0x07, 0x02, 0x0e, 0x18, 0x09, 0x80, 0xb3, 0x2d, 0x74, 0x0c, 0x80, 0xd6,
+ 0x1a, 0x0c, 0x05, 0x80, 0xff, 0x05, 0x80, 0xdf, 0x0c, 0xee, 0x0d, 0x03,
+ 0x84, 0x8d, 0x03, 0x37, 0x09, 0x81, 0x5c, 0x14, 0x80, 0xb8, 0x08, 0x80,
+ 0xcb, 0x2a, 0x38, 0x03, 0x0a, 0x06, 0x38, 0x08, 0x46, 0x08, 0x0c, 0x06,
+ 0x74, 0x0b, 0x1e, 0x03, 0x5a, 0x04, 0x59, 0x09, 0x80, 0x83, 0x18, 0x1c,
+ 0x0a, 0x16, 0x09, 0x4c, 0x04, 0x80, 0x8a, 0x06, 0xab, 0xa4, 0x0c, 0x17,
+ 0x04, 0x31, 0xa1, 0x04, 0x81, 0xda, 0x26, 0x07, 0x0c, 0x05, 0x05, 0x80,
+ 0xa5, 0x11, 0x81, 0x6d, 0x10, 0x78, 0x28, 0x2a, 0x06, 0x4c, 0x04, 0x80,
+ 0x8d, 0x04, 0x80, 0xbe, 0x03, 0x1b, 0x03, 0x0f, 0x0d,
+ };
+ static constexpr unsigned char normal1[] = {
+ 0x5e, 0x22, 0x7b, 0x05, 0x03, 0x04, 0x2d, 0x03, 0x66, 0x03, 0x01, 0x2f,
+ 0x2e, 0x80, 0x82, 0x1d, 0x03, 0x31, 0x0f, 0x1c, 0x04, 0x24, 0x09, 0x1e,
+ 0x05, 0x2b, 0x05, 0x44, 0x04, 0x0e, 0x2a, 0x80, 0xaa, 0x06, 0x24, 0x04,
+ 0x24, 0x04, 0x28, 0x08, 0x34, 0x0b, 0x01, 0x80, 0x90, 0x81, 0x37, 0x09,
+ 0x16, 0x0a, 0x08, 0x80, 0x98, 0x39, 0x03, 0x63, 0x08, 0x09, 0x30, 0x16,
+ 0x05, 0x21, 0x03, 0x1b, 0x05, 0x01, 0x40, 0x38, 0x04, 0x4b, 0x05, 0x2f,
+ 0x04, 0x0a, 0x07, 0x09, 0x07, 0x40, 0x20, 0x27, 0x04, 0x0c, 0x09, 0x36,
+ 0x03, 0x3a, 0x05, 0x1a, 0x07, 0x04, 0x0c, 0x07, 0x50, 0x49, 0x37, 0x33,
+ 0x0d, 0x33, 0x07, 0x2e, 0x08, 0x0a, 0x81, 0x26, 0x52, 0x4e, 0x28, 0x08,
+ 0x2a, 0x56, 0x1c, 0x14, 0x17, 0x09, 0x4e, 0x04, 0x1e, 0x0f, 0x43, 0x0e,
+ 0x19, 0x07, 0x0a, 0x06, 0x48, 0x08, 0x27, 0x09, 0x75, 0x0b, 0x3f, 0x41,
+ 0x2a, 0x06, 0x3b, 0x05, 0x0a, 0x06, 0x51, 0x06, 0x01, 0x05, 0x10, 0x03,
+ 0x05, 0x80, 0x8b, 0x62, 0x1e, 0x48, 0x08, 0x0a, 0x80, 0xa6, 0x5e, 0x22,
+ 0x45, 0x0b, 0x0a, 0x06, 0x0d, 0x13, 0x39, 0x07, 0x0a, 0x36, 0x2c, 0x04,
+ 0x10, 0x80, 0xc0, 0x3c, 0x64, 0x53, 0x0c, 0x48, 0x09, 0x0a, 0x46, 0x45,
+ 0x1b, 0x48, 0x08, 0x53, 0x1d, 0x39, 0x81, 0x07, 0x46, 0x0a, 0x1d, 0x03,
+ 0x47, 0x49, 0x37, 0x03, 0x0e, 0x08, 0x0a, 0x06, 0x39, 0x07, 0x0a, 0x81,
+ 0x36, 0x19, 0x80, 0xb7, 0x01, 0x0f, 0x32, 0x0d, 0x83, 0x9b, 0x66, 0x75,
+ 0x0b, 0x80, 0xc4, 0x8a, 0xbc, 0x84, 0x2f, 0x8f, 0xd1, 0x82, 0x47, 0xa1,
+ 0xb9, 0x82, 0x39, 0x07, 0x2a, 0x04, 0x02, 0x60, 0x26, 0x0a, 0x46, 0x0a,
+ 0x28, 0x05, 0x13, 0x82, 0xb0, 0x5b, 0x65, 0x4b, 0x04, 0x39, 0x07, 0x11,
+ 0x40, 0x05, 0x0b, 0x02, 0x0e, 0x97, 0xf8, 0x08, 0x84, 0xd6, 0x2a, 0x09,
+ 0xa2, 0xf7, 0x81, 0x1f, 0x31, 0x03, 0x11, 0x04, 0x08, 0x81, 0x8c, 0x89,
+ 0x04, 0x6b, 0x05, 0x0d, 0x03, 0x09, 0x07, 0x10, 0x93, 0x60, 0x80, 0xf6,
+ 0x0a, 0x73, 0x08, 0x6e, 0x17, 0x46, 0x80, 0x9a, 0x14, 0x0c, 0x57, 0x09,
+ 0x19, 0x80, 0x87, 0x81, 0x47, 0x03, 0x85, 0x42, 0x0f, 0x15, 0x85, 0x50,
+ 0x2b, 0x80, 0xd5, 0x2d, 0x03, 0x1a, 0x04, 0x02, 0x81, 0x70, 0x3a, 0x05,
+ 0x01, 0x85, 0x00, 0x80, 0xd7, 0x29, 0x4c, 0x04, 0x0a, 0x04, 0x02, 0x83,
+ 0x11, 0x44, 0x4c, 0x3d, 0x80, 0xc2, 0x3c, 0x06, 0x01, 0x04, 0x55, 0x05,
+ 0x1b, 0x34, 0x02, 0x81, 0x0e, 0x2c, 0x04, 0x64, 0x0c, 0x56, 0x0a, 0x80,
+ 0xae, 0x38, 0x1d, 0x0d, 0x2c, 0x04, 0x09, 0x07, 0x02, 0x0e, 0x06, 0x80,
+ 0x9a, 0x83, 0xd8, 0x08, 0x0d, 0x03, 0x0d, 0x03, 0x74, 0x0c, 0x59, 0x07,
+ 0x0c, 0x14, 0x0c, 0x04, 0x38, 0x08, 0x0a, 0x06, 0x28, 0x08, 0x22, 0x4e,
+ 0x81, 0x54, 0x0c, 0x15, 0x03, 0x03, 0x05, 0x07, 0x09, 0x19, 0x07, 0x07,
+ 0x09, 0x03, 0x0d, 0x07, 0x29, 0x80, 0xcb, 0x25, 0x0a, 0x84, 0x06,
+ };
+ auto lower = static_cast<uint16_t>(cp);
+ if (cp < 0x10000) {
+ return is_printable(lower, singletons0,
+ sizeof(singletons0) / sizeof(*singletons0),
+ singletons0_lower, normal0, sizeof(normal0));
+ }
+ if (cp < 0x20000) {
+ return is_printable(lower, singletons1,
+ sizeof(singletons1) / sizeof(*singletons1),
+ singletons1_lower, normal1, sizeof(normal1));
+ }
+ if (0x2a6de <= cp && cp < 0x2a700) return false;
+ if (0x2b735 <= cp && cp < 0x2b740) return false;
+ if (0x2b81e <= cp && cp < 0x2b820) return false;
+ if (0x2cea2 <= cp && cp < 0x2ceb0) return false;
+ if (0x2ebe1 <= cp && cp < 0x2f800) return false;
+ if (0x2fa1e <= cp && cp < 0x30000) return false;
+ if (0x3134b <= cp && cp < 0xe0100) return false;
+ if (0xe01f0 <= cp && cp < 0x110000) return false;
+ return cp < 0x110000;
+}
+
+} // namespace detail
+
+FMT_END_NAMESPACE
+
+#endif // FMT_FORMAT_INL_H_
diff --git a/contrib/fmt/include/fmt/format.h b/contrib/fmt/include/fmt/format.h
new file mode 100644
index 0000000..ed8b29e
--- /dev/null
+++ b/contrib/fmt/include/fmt/format.h
@@ -0,0 +1,4735 @@
+/*
+ Formatting library for C++
+
+ Copyright (c) 2012 - present, Victor Zverovich
+
+ Permission is hereby granted, free of charge, to any person obtaining
+ a copy of this software and associated documentation files (the
+ "Software"), to deal in the Software without restriction, including
+ without limitation the rights to use, copy, modify, merge, publish,
+ distribute, sublicense, and/or sell copies of the Software, and to
+ permit persons to whom the Software is furnished to do so, subject to
+ the following conditions:
+
+ The above copyright notice and this permission notice shall be
+ included in all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+ --- Optional exception to the license ---
+
+ As an exception, if, as a result of your compiling your source code, portions
+ of this Software are embedded into a machine-executable object form of such
+ source code, you may redistribute such embedded portions in such object form
+ without including the above copyright and permission notices.
+ */
+
+#ifndef FMT_FORMAT_H_
+#define FMT_FORMAT_H_
+
+#include <cmath> // std::signbit
+#include <cstdint> // uint32_t
+#include <cstring> // std::memcpy
+#include <initializer_list> // std::initializer_list
+#include <limits> // std::numeric_limits
+#include <memory> // std::uninitialized_copy
+#include <stdexcept> // std::runtime_error
+#include <system_error> // std::system_error
+
+#ifdef __cpp_lib_bit_cast
+# include <bit> // std::bitcast
+#endif
+
+#include "core.h"
+
+#ifndef FMT_BEGIN_DETAIL_NAMESPACE
+# define FMT_BEGIN_DETAIL_NAMESPACE namespace detail {
+# define FMT_END_DETAIL_NAMESPACE }
+#endif
+
+#if FMT_HAS_CPP17_ATTRIBUTE(fallthrough)
+# define FMT_FALLTHROUGH [[fallthrough]]
+#elif defined(__clang__)
+# define FMT_FALLTHROUGH [[clang::fallthrough]]
+#elif FMT_GCC_VERSION >= 700 && \
+ (!defined(__EDG_VERSION__) || __EDG_VERSION__ >= 520)
+# define FMT_FALLTHROUGH [[gnu::fallthrough]]
+#else
+# define FMT_FALLTHROUGH
+#endif
+
+#ifndef FMT_DEPRECATED
+# if FMT_HAS_CPP14_ATTRIBUTE(deprecated) || FMT_MSC_VERSION >= 1900
+# define FMT_DEPRECATED [[deprecated]]
+# else
+# if (defined(__GNUC__) && !defined(__LCC__)) || defined(__clang__)
+# define FMT_DEPRECATED __attribute__((deprecated))
+# elif FMT_MSC_VERSION
+# define FMT_DEPRECATED __declspec(deprecated)
+# else
+# define FMT_DEPRECATED /* deprecated */
+# endif
+# endif
+#endif
+
+#if FMT_GCC_VERSION
+# define FMT_GCC_VISIBILITY_HIDDEN __attribute__((visibility("hidden")))
+#else
+# define FMT_GCC_VISIBILITY_HIDDEN
+#endif
+
+#ifdef __NVCC__
+# define FMT_CUDA_VERSION (__CUDACC_VER_MAJOR__ * 100 + __CUDACC_VER_MINOR__)
+#else
+# define FMT_CUDA_VERSION 0
+#endif
+
+#ifdef __has_builtin
+# define FMT_HAS_BUILTIN(x) __has_builtin(x)
+#else
+# define FMT_HAS_BUILTIN(x) 0
+#endif
+
+#if FMT_GCC_VERSION || FMT_CLANG_VERSION
+# define FMT_NOINLINE __attribute__((noinline))
+#else
+# define FMT_NOINLINE
+#endif
+
+#ifndef FMT_THROW
+# if FMT_EXCEPTIONS
+# if FMT_MSC_VERSION || defined(__NVCC__)
+FMT_BEGIN_NAMESPACE
+namespace detail {
+template <typename Exception> inline void do_throw(const Exception& x) {
+ // Silence unreachable code warnings in MSVC and NVCC because these
+ // are nearly impossible to fix in a generic code.
+ volatile bool b = true;
+ if (b) throw x;
+}
+} // namespace detail
+FMT_END_NAMESPACE
+# define FMT_THROW(x) detail::do_throw(x)
+# else
+# define FMT_THROW(x) throw x
+# endif
+# else
+# define FMT_THROW(x) \
+ do { \
+ FMT_ASSERT(false, (x).what()); \
+ } while (false)
+# endif
+#endif
+
+#if FMT_EXCEPTIONS
+# define FMT_TRY try
+# define FMT_CATCH(x) catch (x)
+#else
+# define FMT_TRY if (true)
+# define FMT_CATCH(x) if (false)
+#endif
+
+#ifndef FMT_MAYBE_UNUSED
+# if FMT_HAS_CPP17_ATTRIBUTE(maybe_unused)
+# define FMT_MAYBE_UNUSED [[maybe_unused]]
+# else
+# define FMT_MAYBE_UNUSED
+# endif
+#endif
+
+#ifndef FMT_USE_USER_DEFINED_LITERALS
+// EDG based compilers (Intel, NVIDIA, Elbrus, etc), GCC and MSVC support UDLs.
+# if (FMT_HAS_FEATURE(cxx_user_literals) || FMT_GCC_VERSION >= 407 || \
+ FMT_MSC_VERSION >= 1900) && \
+ (!defined(__EDG_VERSION__) || __EDG_VERSION__ >= /* UDL feature */ 480)
+# define FMT_USE_USER_DEFINED_LITERALS 1
+# else
+# define FMT_USE_USER_DEFINED_LITERALS 0
+# endif
+#endif
+
+// Defining FMT_REDUCE_INT_INSTANTIATIONS to 1, will reduce the number of
+// integer formatter template instantiations to just one by only using the
+// largest integer type. This results in a reduction in binary size but will
+// cause a decrease in integer formatting performance.
+#if !defined(FMT_REDUCE_INT_INSTANTIATIONS)
+# define FMT_REDUCE_INT_INSTANTIATIONS 0
+#endif
+
+// __builtin_clz is broken in clang with Microsoft CodeGen:
+// https://github.com/fmtlib/fmt/issues/519.
+#if !FMT_MSC_VERSION
+# if FMT_HAS_BUILTIN(__builtin_clz) || FMT_GCC_VERSION || FMT_ICC_VERSION
+# define FMT_BUILTIN_CLZ(n) __builtin_clz(n)
+# endif
+# if FMT_HAS_BUILTIN(__builtin_clzll) || FMT_GCC_VERSION || FMT_ICC_VERSION
+# define FMT_BUILTIN_CLZLL(n) __builtin_clzll(n)
+# endif
+#endif
+
+// __builtin_ctz is broken in Intel Compiler Classic on Windows:
+// https://github.com/fmtlib/fmt/issues/2510.
+#ifndef __ICL
+# if FMT_HAS_BUILTIN(__builtin_ctz) || FMT_GCC_VERSION || FMT_ICC_VERSION || \
+ defined(__NVCOMPILER)
+# define FMT_BUILTIN_CTZ(n) __builtin_ctz(n)
+# endif
+# if FMT_HAS_BUILTIN(__builtin_ctzll) || FMT_GCC_VERSION || \
+ FMT_ICC_VERSION || defined(__NVCOMPILER)
+# define FMT_BUILTIN_CTZLL(n) __builtin_ctzll(n)
+# endif
+#endif
+
+#if FMT_MSC_VERSION
+# include <intrin.h> // _BitScanReverse[64], _BitScanForward[64], _umul128
+#endif
+
+// Some compilers masquerade as both MSVC and GCC-likes or otherwise support
+// __builtin_clz and __builtin_clzll, so only define FMT_BUILTIN_CLZ using the
+// MSVC intrinsics if the clz and clzll builtins are not available.
+#if FMT_MSC_VERSION && !defined(FMT_BUILTIN_CLZLL) && \
+ !defined(FMT_BUILTIN_CTZLL)
+FMT_BEGIN_NAMESPACE
+namespace detail {
+// Avoid Clang with Microsoft CodeGen's -Wunknown-pragmas warning.
+# if !defined(__clang__)
+# pragma intrinsic(_BitScanForward)
+# pragma intrinsic(_BitScanReverse)
+# if defined(_WIN64)
+# pragma intrinsic(_BitScanForward64)
+# pragma intrinsic(_BitScanReverse64)
+# endif
+# endif
+
+inline auto clz(uint32_t x) -> int {
+ unsigned long r = 0;
+ _BitScanReverse(&r, x);
+ FMT_ASSERT(x != 0, "");
+ // Static analysis complains about using uninitialized data
+ // "r", but the only way that can happen is if "x" is 0,
+ // which the callers guarantee to not happen.
+ FMT_MSC_WARNING(suppress : 6102)
+ return 31 ^ static_cast<int>(r);
+}
+# define FMT_BUILTIN_CLZ(n) detail::clz(n)
+
+inline auto clzll(uint64_t x) -> int {
+ unsigned long r = 0;
+# ifdef _WIN64
+ _BitScanReverse64(&r, x);
+# else
+ // Scan the high 32 bits.
+ if (_BitScanReverse(&r, static_cast<uint32_t>(x >> 32)))
+ return 63 ^ static_cast<int>(r + 32);
+ // Scan the low 32 bits.
+ _BitScanReverse(&r, static_cast<uint32_t>(x));
+# endif
+ FMT_ASSERT(x != 0, "");
+ FMT_MSC_WARNING(suppress : 6102) // Suppress a bogus static analysis warning.
+ return 63 ^ static_cast<int>(r);
+}
+# define FMT_BUILTIN_CLZLL(n) detail::clzll(n)
+
+inline auto ctz(uint32_t x) -> int {
+ unsigned long r = 0;
+ _BitScanForward(&r, x);
+ FMT_ASSERT(x != 0, "");
+ FMT_MSC_WARNING(suppress : 6102) // Suppress a bogus static analysis warning.
+ return static_cast<int>(r);
+}
+# define FMT_BUILTIN_CTZ(n) detail::ctz(n)
+
+inline auto ctzll(uint64_t x) -> int {
+ unsigned long r = 0;
+ FMT_ASSERT(x != 0, "");
+ FMT_MSC_WARNING(suppress : 6102) // Suppress a bogus static analysis warning.
+# ifdef _WIN64
+ _BitScanForward64(&r, x);
+# else
+ // Scan the low 32 bits.
+ if (_BitScanForward(&r, static_cast<uint32_t>(x))) return static_cast<int>(r);
+ // Scan the high 32 bits.
+ _BitScanForward(&r, static_cast<uint32_t>(x >> 32));
+ r += 32;
+# endif
+ return static_cast<int>(r);
+}
+# define FMT_BUILTIN_CTZLL(n) detail::ctzll(n)
+} // namespace detail
+FMT_END_NAMESPACE
+#endif
+
+FMT_BEGIN_NAMESPACE
+
+template <typename...> struct disjunction : std::false_type {};
+template <typename P> struct disjunction<P> : P {};
+template <typename P1, typename... Pn>
+struct disjunction<P1, Pn...>
+ : conditional_t<bool(P1::value), P1, disjunction<Pn...>> {};
+
+template <typename...> struct conjunction : std::true_type {};
+template <typename P> struct conjunction<P> : P {};
+template <typename P1, typename... Pn>
+struct conjunction<P1, Pn...>
+ : conditional_t<bool(P1::value), conjunction<Pn...>, P1> {};
+
+namespace detail {
+
+FMT_CONSTEXPR inline void abort_fuzzing_if(bool condition) {
+ ignore_unused(condition);
+#ifdef FMT_FUZZ
+ if (condition) throw std::runtime_error("fuzzing limit reached");
+#endif
+}
+
+template <typename CharT, CharT... C> struct string_literal {
+ static constexpr CharT value[sizeof...(C)] = {C...};
+ constexpr operator basic_string_view<CharT>() const {
+ return {value, sizeof...(C)};
+ }
+};
+
+#if FMT_CPLUSPLUS < 201703L
+template <typename CharT, CharT... C>
+constexpr CharT string_literal<CharT, C...>::value[sizeof...(C)];
+#endif
+
+template <typename Streambuf> class formatbuf : public Streambuf {
+ private:
+ using char_type = typename Streambuf::char_type;
+ using streamsize = decltype(std::declval<Streambuf>().sputn(nullptr, 0));
+ using int_type = typename Streambuf::int_type;
+ using traits_type = typename Streambuf::traits_type;
+
+ buffer<char_type>& buffer_;
+
+ public:
+ explicit formatbuf(buffer<char_type>& buf) : buffer_(buf) {}
+
+ protected:
+ // The put area is always empty. This makes the implementation simpler and has
+ // the advantage that the streambuf and the buffer are always in sync and
+ // sputc never writes into uninitialized memory. A disadvantage is that each
+ // call to sputc always results in a (virtual) call to overflow. There is no
+ // disadvantage here for sputn since this always results in a call to xsputn.
+
+ auto overflow(int_type ch) -> int_type override {
+ if (!traits_type::eq_int_type(ch, traits_type::eof()))
+ buffer_.push_back(static_cast<char_type>(ch));
+ return ch;
+ }
+
+ auto xsputn(const char_type* s, streamsize count) -> streamsize override {
+ buffer_.append(s, s + count);
+ return count;
+ }
+};
+
+// Implementation of std::bit_cast for pre-C++20.
+template <typename To, typename From, FMT_ENABLE_IF(sizeof(To) == sizeof(From))>
+FMT_CONSTEXPR20 auto bit_cast(const From& from) -> To {
+#ifdef __cpp_lib_bit_cast
+ if (is_constant_evaluated()) return std::bit_cast<To>(from);
+#endif
+ auto to = To();
+ // The cast suppresses a bogus -Wclass-memaccess on GCC.
+ std::memcpy(static_cast<void*>(&to), &from, sizeof(to));
+ return to;
+}
+
+inline auto is_big_endian() -> bool {
+#ifdef _WIN32
+ return false;
+#elif defined(__BIG_ENDIAN__)
+ return true;
+#elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__)
+ return __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__;
+#else
+ struct bytes {
+ char data[sizeof(int)];
+ };
+ return bit_cast<bytes>(1).data[0] == 0;
+#endif
+}
+
+class uint128_fallback {
+ private:
+ uint64_t lo_, hi_;
+
+ friend uint128_fallback umul128(uint64_t x, uint64_t y) noexcept;
+
+ public:
+ constexpr uint128_fallback(uint64_t hi, uint64_t lo) : lo_(lo), hi_(hi) {}
+ constexpr uint128_fallback(uint64_t value = 0) : lo_(value), hi_(0) {}
+
+ constexpr uint64_t high() const noexcept { return hi_; }
+ constexpr uint64_t low() const noexcept { return lo_; }
+
+ template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+ constexpr explicit operator T() const {
+ return static_cast<T>(lo_);
+ }
+
+ friend constexpr auto operator==(const uint128_fallback& lhs,
+ const uint128_fallback& rhs) -> bool {
+ return lhs.hi_ == rhs.hi_ && lhs.lo_ == rhs.lo_;
+ }
+ friend constexpr auto operator!=(const uint128_fallback& lhs,
+ const uint128_fallback& rhs) -> bool {
+ return !(lhs == rhs);
+ }
+ friend constexpr auto operator>(const uint128_fallback& lhs,
+ const uint128_fallback& rhs) -> bool {
+ return lhs.hi_ != rhs.hi_ ? lhs.hi_ > rhs.hi_ : lhs.lo_ > rhs.lo_;
+ }
+ friend constexpr auto operator|(const uint128_fallback& lhs,
+ const uint128_fallback& rhs)
+ -> uint128_fallback {
+ return {lhs.hi_ | rhs.hi_, lhs.lo_ | rhs.lo_};
+ }
+ friend constexpr auto operator&(const uint128_fallback& lhs,
+ const uint128_fallback& rhs)
+ -> uint128_fallback {
+ return {lhs.hi_ & rhs.hi_, lhs.lo_ & rhs.lo_};
+ }
+ friend constexpr auto operator~(const uint128_fallback& n)
+ -> uint128_fallback {
+ return {~n.hi_, ~n.lo_};
+ }
+ friend auto operator+(const uint128_fallback& lhs,
+ const uint128_fallback& rhs) -> uint128_fallback {
+ auto result = uint128_fallback(lhs);
+ result += rhs;
+ return result;
+ }
+ friend auto operator*(const uint128_fallback& lhs, uint32_t rhs)
+ -> uint128_fallback {
+ FMT_ASSERT(lhs.hi_ == 0, "");
+ uint64_t hi = (lhs.lo_ >> 32) * rhs;
+ uint64_t lo = (lhs.lo_ & ~uint32_t()) * rhs;
+ uint64_t new_lo = (hi << 32) + lo;
+ return {(hi >> 32) + (new_lo < lo ? 1 : 0), new_lo};
+ }
+ friend auto operator-(const uint128_fallback& lhs, uint64_t rhs)
+ -> uint128_fallback {
+ return {lhs.hi_ - (lhs.lo_ < rhs ? 1 : 0), lhs.lo_ - rhs};
+ }
+ FMT_CONSTEXPR auto operator>>(int shift) const -> uint128_fallback {
+ if (shift == 64) return {0, hi_};
+ if (shift > 64) return uint128_fallback(0, hi_) >> (shift - 64);
+ return {hi_ >> shift, (hi_ << (64 - shift)) | (lo_ >> shift)};
+ }
+ FMT_CONSTEXPR auto operator<<(int shift) const -> uint128_fallback {
+ if (shift == 64) return {lo_, 0};
+ if (shift > 64) return uint128_fallback(lo_, 0) << (shift - 64);
+ return {hi_ << shift | (lo_ >> (64 - shift)), (lo_ << shift)};
+ }
+ FMT_CONSTEXPR auto operator>>=(int shift) -> uint128_fallback& {
+ return *this = *this >> shift;
+ }
+ FMT_CONSTEXPR void operator+=(uint128_fallback n) {
+ uint64_t new_lo = lo_ + n.lo_;
+ uint64_t new_hi = hi_ + n.hi_ + (new_lo < lo_ ? 1 : 0);
+ FMT_ASSERT(new_hi >= hi_, "");
+ lo_ = new_lo;
+ hi_ = new_hi;
+ }
+ FMT_CONSTEXPR void operator&=(uint128_fallback n) {
+ lo_ &= n.lo_;
+ hi_ &= n.hi_;
+ }
+
+ FMT_CONSTEXPR20 uint128_fallback& operator+=(uint64_t n) noexcept {
+ if (is_constant_evaluated()) {
+ lo_ += n;
+ hi_ += (lo_ < n ? 1 : 0);
+ return *this;
+ }
+#if FMT_HAS_BUILTIN(__builtin_addcll) && !defined(__ibmxl__)
+ unsigned long long carry;
+ lo_ = __builtin_addcll(lo_, n, 0, &carry);
+ hi_ += carry;
+#elif FMT_HAS_BUILTIN(__builtin_ia32_addcarryx_u64) && !defined(__ibmxl__)
+ unsigned long long result;
+ auto carry = __builtin_ia32_addcarryx_u64(0, lo_, n, &result);
+ lo_ = result;
+ hi_ += carry;
+#elif defined(_MSC_VER) && defined(_M_X64)
+ auto carry = _addcarry_u64(0, lo_, n, &lo_);
+ _addcarry_u64(carry, hi_, 0, &hi_);
+#else
+ lo_ += n;
+ hi_ += (lo_ < n ? 1 : 0);
+#endif
+ return *this;
+ }
+};
+
+using uint128_t = conditional_t<FMT_USE_INT128, uint128_opt, uint128_fallback>;
+
+#ifdef UINTPTR_MAX
+using uintptr_t = ::uintptr_t;
+#else
+using uintptr_t = uint128_t;
+#endif
+
+// Returns the largest possible value for type T. Same as
+// std::numeric_limits<T>::max() but shorter and not affected by the max macro.
+template <typename T> constexpr auto max_value() -> T {
+ return (std::numeric_limits<T>::max)();
+}
+template <typename T> constexpr auto num_bits() -> int {
+ return std::numeric_limits<T>::digits;
+}
+// std::numeric_limits<T>::digits may return 0 for 128-bit ints.
+template <> constexpr auto num_bits<int128_opt>() -> int { return 128; }
+template <> constexpr auto num_bits<uint128_t>() -> int { return 128; }
+
+// A heterogeneous bit_cast used for converting 96-bit long double to uint128_t
+// and 128-bit pointers to uint128_fallback.
+template <typename To, typename From, FMT_ENABLE_IF(sizeof(To) > sizeof(From))>
+inline auto bit_cast(const From& from) -> To {
+ constexpr auto size = static_cast<int>(sizeof(From) / sizeof(unsigned));
+ struct data_t {
+ unsigned value[static_cast<unsigned>(size)];
+ } data = bit_cast<data_t>(from);
+ auto result = To();
+ if (const_check(is_big_endian())) {
+ for (int i = 0; i < size; ++i)
+ result = (result << num_bits<unsigned>()) | data.value[i];
+ } else {
+ for (int i = size - 1; i >= 0; --i)
+ result = (result << num_bits<unsigned>()) | data.value[i];
+ }
+ return result;
+}
+
+template <typename UInt>
+FMT_CONSTEXPR20 inline auto countl_zero_fallback(UInt n) -> int {
+ int lz = 0;
+ constexpr UInt msb_mask = static_cast<UInt>(1) << (num_bits<UInt>() - 1);
+ for (; (n & msb_mask) == 0; n <<= 1) lz++;
+ return lz;
+}
+
+FMT_CONSTEXPR20 inline auto countl_zero(uint32_t n) -> int {
+#ifdef FMT_BUILTIN_CLZ
+ if (!is_constant_evaluated()) return FMT_BUILTIN_CLZ(n);
+#endif
+ return countl_zero_fallback(n);
+}
+
+FMT_CONSTEXPR20 inline auto countl_zero(uint64_t n) -> int {
+#ifdef FMT_BUILTIN_CLZLL
+ if (!is_constant_evaluated()) return FMT_BUILTIN_CLZLL(n);
+#endif
+ return countl_zero_fallback(n);
+}
+
+FMT_INLINE void assume(bool condition) {
+ (void)condition;
+#if FMT_HAS_BUILTIN(__builtin_assume) && !FMT_ICC_VERSION
+ __builtin_assume(condition);
+#endif
+}
+
+// An approximation of iterator_t for pre-C++20 systems.
+template <typename T>
+using iterator_t = decltype(std::begin(std::declval<T&>()));
+template <typename T> using sentinel_t = decltype(std::end(std::declval<T&>()));
+
+// A workaround for std::string not having mutable data() until C++17.
+template <typename Char>
+inline auto get_data(std::basic_string<Char>& s) -> Char* {
+ return &s[0];
+}
+template <typename Container>
+inline auto get_data(Container& c) -> typename Container::value_type* {
+ return c.data();
+}
+
+#if defined(_SECURE_SCL) && _SECURE_SCL
+// Make a checked iterator to avoid MSVC warnings.
+template <typename T> using checked_ptr = stdext::checked_array_iterator<T*>;
+template <typename T>
+constexpr auto make_checked(T* p, size_t size) -> checked_ptr<T> {
+ return {p, size};
+}
+#else
+template <typename T> using checked_ptr = T*;
+template <typename T> constexpr auto make_checked(T* p, size_t) -> T* {
+ return p;
+}
+#endif
+
+// Attempts to reserve space for n extra characters in the output range.
+// Returns a pointer to the reserved range or a reference to it.
+template <typename Container, FMT_ENABLE_IF(is_contiguous<Container>::value)>
+#if FMT_CLANG_VERSION >= 307 && !FMT_ICC_VERSION
+__attribute__((no_sanitize("undefined")))
+#endif
+inline auto
+reserve(std::back_insert_iterator<Container> it, size_t n)
+ -> checked_ptr<typename Container::value_type> {
+ Container& c = get_container(it);
+ size_t size = c.size();
+ c.resize(size + n);
+ return make_checked(get_data(c) + size, n);
+}
+
+template <typename T>
+inline auto reserve(buffer_appender<T> it, size_t n) -> buffer_appender<T> {
+ buffer<T>& buf = get_container(it);
+ buf.try_reserve(buf.size() + n);
+ return it;
+}
+
+template <typename Iterator>
+constexpr auto reserve(Iterator& it, size_t) -> Iterator& {
+ return it;
+}
+
+template <typename OutputIt>
+using reserve_iterator =
+ remove_reference_t<decltype(reserve(std::declval<OutputIt&>(), 0))>;
+
+template <typename T, typename OutputIt>
+constexpr auto to_pointer(OutputIt, size_t) -> T* {
+ return nullptr;
+}
+template <typename T> auto to_pointer(buffer_appender<T> it, size_t n) -> T* {
+ buffer<T>& buf = get_container(it);
+ auto size = buf.size();
+ if (buf.capacity() < size + n) return nullptr;
+ buf.try_resize(size + n);
+ return buf.data() + size;
+}
+
+template <typename Container, FMT_ENABLE_IF(is_contiguous<Container>::value)>
+inline auto base_iterator(std::back_insert_iterator<Container>& it,
+ checked_ptr<typename Container::value_type>)
+ -> std::back_insert_iterator<Container> {
+ return it;
+}
+
+template <typename Iterator>
+constexpr auto base_iterator(Iterator, Iterator it) -> Iterator {
+ return it;
+}
+
+// <algorithm> is spectacularly slow to compile in C++20 so use a simple fill_n
+// instead (#1998).
+template <typename OutputIt, typename Size, typename T>
+FMT_CONSTEXPR auto fill_n(OutputIt out, Size count, const T& value)
+ -> OutputIt {
+ for (Size i = 0; i < count; ++i) *out++ = value;
+ return out;
+}
+template <typename T, typename Size>
+FMT_CONSTEXPR20 auto fill_n(T* out, Size count, char value) -> T* {
+ if (is_constant_evaluated()) {
+ return fill_n<T*, Size, T>(out, count, value);
+ }
+ std::memset(out, value, to_unsigned(count));
+ return out + count;
+}
+
+#ifdef __cpp_char8_t
+using char8_type = char8_t;
+#else
+enum char8_type : unsigned char {};
+#endif
+
+template <typename OutChar, typename InputIt, typename OutputIt>
+FMT_CONSTEXPR FMT_NOINLINE auto copy_str_noinline(InputIt begin, InputIt end,
+ OutputIt out) -> OutputIt {
+ return copy_str<OutChar>(begin, end, out);
+}
+
+// A public domain branchless UTF-8 decoder by Christopher Wellons:
+// https://github.com/skeeto/branchless-utf8
+/* Decode the next character, c, from s, reporting errors in e.
+ *
+ * Since this is a branchless decoder, four bytes will be read from the
+ * buffer regardless of the actual length of the next character. This
+ * means the buffer _must_ have at least three bytes of zero padding
+ * following the end of the data stream.
+ *
+ * Errors are reported in e, which will be non-zero if the parsed
+ * character was somehow invalid: invalid byte sequence, non-canonical
+ * encoding, or a surrogate half.
+ *
+ * The function returns a pointer to the next character. When an error
+ * occurs, this pointer will be a guess that depends on the particular
+ * error, but it will always advance at least one byte.
+ */
+FMT_CONSTEXPR inline auto utf8_decode(const char* s, uint32_t* c, int* e)
+ -> const char* {
+ constexpr const int masks[] = {0x00, 0x7f, 0x1f, 0x0f, 0x07};
+ constexpr const uint32_t mins[] = {4194304, 0, 128, 2048, 65536};
+ constexpr const int shiftc[] = {0, 18, 12, 6, 0};
+ constexpr const int shifte[] = {0, 6, 4, 2, 0};
+
+ int len = "\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\0\0\0\0\0\0\0\0\2\2\2\2\3\3\4"
+ [static_cast<unsigned char>(*s) >> 3];
+ // Compute the pointer to the next character early so that the next
+ // iteration can start working on the next character. Neither Clang
+ // nor GCC figure out this reordering on their own.
+ const char* next = s + len + !len;
+
+ using uchar = unsigned char;
+
+ // Assume a four-byte character and load four bytes. Unused bits are
+ // shifted out.
+ *c = uint32_t(uchar(s[0]) & masks[len]) << 18;
+ *c |= uint32_t(uchar(s[1]) & 0x3f) << 12;
+ *c |= uint32_t(uchar(s[2]) & 0x3f) << 6;
+ *c |= uint32_t(uchar(s[3]) & 0x3f) << 0;
+ *c >>= shiftc[len];
+
+ // Accumulate the various error conditions.
+ *e = (*c < mins[len]) << 6; // non-canonical encoding
+ *e |= ((*c >> 11) == 0x1b) << 7; // surrogate half?
+ *e |= (*c > 0x10FFFF) << 8; // out of range?
+ *e |= (uchar(s[1]) & 0xc0) >> 2;
+ *e |= (uchar(s[2]) & 0xc0) >> 4;
+ *e |= uchar(s[3]) >> 6;
+ *e ^= 0x2a; // top two bits of each tail byte correct?
+ *e >>= shifte[len];
+
+ return next;
+}
+
+constexpr FMT_INLINE_VARIABLE uint32_t invalid_code_point = ~uint32_t();
+
+// Invokes f(cp, sv) for every code point cp in s with sv being the string view
+// corresponding to the code point. cp is invalid_code_point on error.
+template <typename F>
+FMT_CONSTEXPR void for_each_codepoint(string_view s, F f) {
+ auto decode = [f](const char* buf_ptr, const char* ptr) {
+ auto cp = uint32_t();
+ auto error = 0;
+ auto end = utf8_decode(buf_ptr, &cp, &error);
+ bool result = f(error ? invalid_code_point : cp,
+ string_view(ptr, error ? 1 : to_unsigned(end - buf_ptr)));
+ return result ? (error ? buf_ptr + 1 : end) : nullptr;
+ };
+ auto p = s.data();
+ const size_t block_size = 4; // utf8_decode always reads blocks of 4 chars.
+ if (s.size() >= block_size) {
+ for (auto end = p + s.size() - block_size + 1; p < end;) {
+ p = decode(p, p);
+ if (!p) return;
+ }
+ }
+ if (auto num_chars_left = s.data() + s.size() - p) {
+ char buf[2 * block_size - 1] = {};
+ copy_str<char>(p, p + num_chars_left, buf);
+ const char* buf_ptr = buf;
+ do {
+ auto end = decode(buf_ptr, p);
+ if (!end) return;
+ p += end - buf_ptr;
+ buf_ptr = end;
+ } while (buf_ptr - buf < num_chars_left);
+ }
+}
+
+template <typename Char>
+inline auto compute_width(basic_string_view<Char> s) -> size_t {
+ return s.size();
+}
+
+// Computes approximate display width of a UTF-8 string.
+FMT_CONSTEXPR inline size_t compute_width(string_view s) {
+ size_t num_code_points = 0;
+ // It is not a lambda for compatibility with C++14.
+ struct count_code_points {
+ size_t* count;
+ FMT_CONSTEXPR auto operator()(uint32_t cp, string_view) const -> bool {
+ *count += detail::to_unsigned(
+ 1 +
+ (cp >= 0x1100 &&
+ (cp <= 0x115f || // Hangul Jamo init. consonants
+ cp == 0x2329 || // LEFT-POINTING ANGLE BRACKET
+ cp == 0x232a || // RIGHT-POINTING ANGLE BRACKET
+ // CJK ... Yi except IDEOGRAPHIC HALF FILL SPACE:
+ (cp >= 0x2e80 && cp <= 0xa4cf && cp != 0x303f) ||
+ (cp >= 0xac00 && cp <= 0xd7a3) || // Hangul Syllables
+ (cp >= 0xf900 && cp <= 0xfaff) || // CJK Compatibility Ideographs
+ (cp >= 0xfe10 && cp <= 0xfe19) || // Vertical Forms
+ (cp >= 0xfe30 && cp <= 0xfe6f) || // CJK Compatibility Forms
+ (cp >= 0xff00 && cp <= 0xff60) || // Fullwidth Forms
+ (cp >= 0xffe0 && cp <= 0xffe6) || // Fullwidth Forms
+ (cp >= 0x20000 && cp <= 0x2fffd) || // CJK
+ (cp >= 0x30000 && cp <= 0x3fffd) ||
+ // Miscellaneous Symbols and Pictographs + Emoticons:
+ (cp >= 0x1f300 && cp <= 0x1f64f) ||
+ // Supplemental Symbols and Pictographs:
+ (cp >= 0x1f900 && cp <= 0x1f9ff))));
+ return true;
+ }
+ };
+ // We could avoid branches by using utf8_decode directly.
+ for_each_codepoint(s, count_code_points{&num_code_points});
+ return num_code_points;
+}
+
+inline auto compute_width(basic_string_view<char8_type> s) -> size_t {
+ return compute_width(
+ string_view(reinterpret_cast<const char*>(s.data()), s.size()));
+}
+
+template <typename Char>
+inline auto code_point_index(basic_string_view<Char> s, size_t n) -> size_t {
+ size_t size = s.size();
+ return n < size ? n : size;
+}
+
+// Calculates the index of the nth code point in a UTF-8 string.
+inline auto code_point_index(string_view s, size_t n) -> size_t {
+ const char* data = s.data();
+ size_t num_code_points = 0;
+ for (size_t i = 0, size = s.size(); i != size; ++i) {
+ if ((data[i] & 0xc0) != 0x80 && ++num_code_points > n) return i;
+ }
+ return s.size();
+}
+
+inline auto code_point_index(basic_string_view<char8_type> s, size_t n)
+ -> size_t {
+ return code_point_index(
+ string_view(reinterpret_cast<const char*>(s.data()), s.size()), n);
+}
+
+template <typename T> struct is_integral : std::is_integral<T> {};
+template <> struct is_integral<int128_opt> : std::true_type {};
+template <> struct is_integral<uint128_t> : std::true_type {};
+
+template <typename T>
+using is_signed =
+ std::integral_constant<bool, std::numeric_limits<T>::is_signed ||
+ std::is_same<T, int128_opt>::value>;
+
+template <typename T>
+using is_integer =
+ bool_constant<is_integral<T>::value && !std::is_same<T, bool>::value &&
+ !std::is_same<T, char>::value &&
+ !std::is_same<T, wchar_t>::value>;
+
+#ifndef FMT_USE_FLOAT
+# define FMT_USE_FLOAT 1
+#endif
+#ifndef FMT_USE_DOUBLE
+# define FMT_USE_DOUBLE 1
+#endif
+#ifndef FMT_USE_LONG_DOUBLE
+# define FMT_USE_LONG_DOUBLE 1
+#endif
+
+#ifndef FMT_USE_FLOAT128
+# ifdef __clang__
+// Clang emulates GCC, so it has to appear early.
+# if FMT_HAS_INCLUDE(<quadmath.h>)
+# define FMT_USE_FLOAT128 1
+# endif
+# elif defined(__GNUC__)
+// GNU C++:
+# if defined(_GLIBCXX_USE_FLOAT128) && !defined(__STRICT_ANSI__)
+# define FMT_USE_FLOAT128 1
+# endif
+# endif
+# ifndef FMT_USE_FLOAT128
+# define FMT_USE_FLOAT128 0
+# endif
+#endif
+
+#if FMT_USE_FLOAT128
+using float128 = __float128;
+#else
+using float128 = void;
+#endif
+template <typename T> using is_float128 = std::is_same<T, float128>;
+
+template <typename T>
+using is_floating_point =
+ bool_constant<std::is_floating_point<T>::value || is_float128<T>::value>;
+
+template <typename T, bool = std::is_floating_point<T>::value>
+struct is_fast_float : bool_constant<std::numeric_limits<T>::is_iec559 &&
+ sizeof(T) <= sizeof(double)> {};
+template <typename T> struct is_fast_float<T, false> : std::false_type {};
+
+template <typename T>
+using is_double_double = bool_constant<std::numeric_limits<T>::digits == 106>;
+
+#ifndef FMT_USE_FULL_CACHE_DRAGONBOX
+# define FMT_USE_FULL_CACHE_DRAGONBOX 0
+#endif
+
+template <typename T>
+template <typename U>
+void buffer<T>::append(const U* begin, const U* end) {
+ while (begin != end) {
+ auto count = to_unsigned(end - begin);
+ try_reserve(size_ + count);
+ auto free_cap = capacity_ - size_;
+ if (free_cap < count) count = free_cap;
+ std::uninitialized_copy_n(begin, count, make_checked(ptr_ + size_, count));
+ size_ += count;
+ begin += count;
+ }
+}
+
+template <typename T, typename Enable = void>
+struct is_locale : std::false_type {};
+template <typename T>
+struct is_locale<T, void_t<decltype(T::classic())>> : std::true_type {};
+} // namespace detail
+
+FMT_BEGIN_EXPORT
+
+// The number of characters to store in the basic_memory_buffer object itself
+// to avoid dynamic memory allocation.
+enum { inline_buffer_size = 500 };
+
+/**
+ \rst
+ A dynamically growing memory buffer for trivially copyable/constructible types
+ with the first ``SIZE`` elements stored in the object itself.
+
+ You can use the ``memory_buffer`` type alias for ``char`` instead.
+
+ **Example**::
+
+ auto out = fmt::memory_buffer();
+ format_to(std::back_inserter(out), "The answer is {}.", 42);
+
+ This will append the following output to the ``out`` object:
+
+ .. code-block:: none
+
+ The answer is 42.
+
+ The output can be converted to an ``std::string`` with ``to_string(out)``.
+ \endrst
+ */
+template <typename T, size_t SIZE = inline_buffer_size,
+ typename Allocator = std::allocator<T>>
+class basic_memory_buffer final : public detail::buffer<T> {
+ private:
+ T store_[SIZE];
+
+ // Don't inherit from Allocator avoid generating type_info for it.
+ Allocator alloc_;
+
+ // Deallocate memory allocated by the buffer.
+ FMT_CONSTEXPR20 void deallocate() {
+ T* data = this->data();
+ if (data != store_) alloc_.deallocate(data, this->capacity());
+ }
+
+ protected:
+ FMT_CONSTEXPR20 void grow(size_t size) override {
+ detail::abort_fuzzing_if(size > 5000);
+ const size_t max_size = std::allocator_traits<Allocator>::max_size(alloc_);
+ size_t old_capacity = this->capacity();
+ size_t new_capacity = old_capacity + old_capacity / 2;
+ if (size > new_capacity)
+ new_capacity = size;
+ else if (new_capacity > max_size)
+ new_capacity = size > max_size ? size : max_size;
+ T* old_data = this->data();
+ T* new_data =
+ std::allocator_traits<Allocator>::allocate(alloc_, new_capacity);
+ // The following code doesn't throw, so the raw pointer above doesn't leak.
+ std::uninitialized_copy(old_data, old_data + this->size(),
+ detail::make_checked(new_data, new_capacity));
+ this->set(new_data, new_capacity);
+ // deallocate must not throw according to the standard, but even if it does,
+ // the buffer already uses the new storage and will deallocate it in
+ // destructor.
+ if (old_data != store_) alloc_.deallocate(old_data, old_capacity);
+ }
+
+ public:
+ using value_type = T;
+ using const_reference = const T&;
+
+ FMT_CONSTEXPR20 explicit basic_memory_buffer(
+ const Allocator& alloc = Allocator())
+ : alloc_(alloc) {
+ this->set(store_, SIZE);
+ if (detail::is_constant_evaluated()) detail::fill_n(store_, SIZE, T());
+ }
+ FMT_CONSTEXPR20 ~basic_memory_buffer() { deallocate(); }
+
+ private:
+ // Move data from other to this buffer.
+ FMT_CONSTEXPR20 void move(basic_memory_buffer& other) {
+ alloc_ = std::move(other.alloc_);
+ T* data = other.data();
+ size_t size = other.size(), capacity = other.capacity();
+ if (data == other.store_) {
+ this->set(store_, capacity);
+ detail::copy_str<T>(other.store_, other.store_ + size,
+ detail::make_checked(store_, capacity));
+ } else {
+ this->set(data, capacity);
+ // Set pointer to the inline array so that delete is not called
+ // when deallocating.
+ other.set(other.store_, 0);
+ other.clear();
+ }
+ this->resize(size);
+ }
+
+ public:
+ /**
+ \rst
+ Constructs a :class:`fmt::basic_memory_buffer` object moving the content
+ of the other object to it.
+ \endrst
+ */
+ FMT_CONSTEXPR20 basic_memory_buffer(basic_memory_buffer&& other) noexcept {
+ move(other);
+ }
+
+ /**
+ \rst
+ Moves the content of the other ``basic_memory_buffer`` object to this one.
+ \endrst
+ */
+ auto operator=(basic_memory_buffer&& other) noexcept -> basic_memory_buffer& {
+ FMT_ASSERT(this != &other, "");
+ deallocate();
+ move(other);
+ return *this;
+ }
+
+ // Returns a copy of the allocator associated with this buffer.
+ auto get_allocator() const -> Allocator { return alloc_; }
+
+ /**
+ Resizes the buffer to contain *count* elements. If T is a POD type new
+ elements may not be initialized.
+ */
+ FMT_CONSTEXPR20 void resize(size_t count) { this->try_resize(count); }
+
+ /** Increases the buffer capacity to *new_capacity*. */
+ void reserve(size_t new_capacity) { this->try_reserve(new_capacity); }
+
+ // Directly append data into the buffer
+ using detail::buffer<T>::append;
+ template <typename ContiguousRange>
+ void append(const ContiguousRange& range) {
+ append(range.data(), range.data() + range.size());
+ }
+};
+
+using memory_buffer = basic_memory_buffer<char>;
+
+template <typename T, size_t SIZE, typename Allocator>
+struct is_contiguous<basic_memory_buffer<T, SIZE, Allocator>> : std::true_type {
+};
+
+FMT_END_EXPORT
+namespace detail {
+FMT_API bool write_console(std::FILE* f, string_view text);
+FMT_API void print(std::FILE*, string_view);
+} // namespace detail
+FMT_BEGIN_EXPORT
+
+// Suppress a misleading warning in older versions of clang.
+#if FMT_CLANG_VERSION
+# pragma clang diagnostic ignored "-Wweak-vtables"
+#endif
+
+/** An error reported from a formatting function. */
+class FMT_API format_error : public std::runtime_error {
+ public:
+ using std::runtime_error::runtime_error;
+};
+
+namespace detail_exported {
+#if FMT_USE_NONTYPE_TEMPLATE_ARGS
+template <typename Char, size_t N> struct fixed_string {
+ constexpr fixed_string(const Char (&str)[N]) {
+ detail::copy_str<Char, const Char*, Char*>(static_cast<const Char*>(str),
+ str + N, data);
+ }
+ Char data[N] = {};
+};
+#endif
+
+// Converts a compile-time string to basic_string_view.
+template <typename Char, size_t N>
+constexpr auto compile_string_to_view(const Char (&s)[N])
+ -> basic_string_view<Char> {
+ // Remove trailing NUL character if needed. Won't be present if this is used
+ // with a raw character array (i.e. not defined as a string).
+ return {s, N - (std::char_traits<Char>::to_int_type(s[N - 1]) == 0 ? 1 : 0)};
+}
+template <typename Char>
+constexpr auto compile_string_to_view(detail::std_string_view<Char> s)
+ -> basic_string_view<Char> {
+ return {s.data(), s.size()};
+}
+} // namespace detail_exported
+
+class loc_value {
+ private:
+ basic_format_arg<format_context> value_;
+
+ public:
+ template <typename T, FMT_ENABLE_IF(!detail::is_float128<T>::value)>
+ loc_value(T value) : value_(detail::make_arg<format_context>(value)) {}
+
+ template <typename T, FMT_ENABLE_IF(detail::is_float128<T>::value)>
+ loc_value(T) {}
+
+ template <typename Visitor> auto visit(Visitor&& vis) -> decltype(vis(0)) {
+ return visit_format_arg(vis, value_);
+ }
+};
+
+// A locale facet that formats values in UTF-8.
+// It is parameterized on the locale to avoid the heavy <locale> include.
+template <typename Locale> class format_facet : public Locale::facet {
+ private:
+ std::string separator_;
+ std::string grouping_;
+ std::string decimal_point_;
+
+ protected:
+ virtual auto do_put(appender out, loc_value val,
+ const format_specs<>& specs) const -> bool;
+
+ public:
+ static FMT_API typename Locale::id id;
+
+ explicit format_facet(Locale& loc);
+ explicit format_facet(string_view sep = "",
+ std::initializer_list<unsigned char> g = {3},
+ std::string decimal_point = ".")
+ : separator_(sep.data(), sep.size()),
+ grouping_(g.begin(), g.end()),
+ decimal_point_(decimal_point) {}
+
+ auto put(appender out, loc_value val, const format_specs<>& specs) const
+ -> bool {
+ return do_put(out, val, specs);
+ }
+};
+
+FMT_BEGIN_DETAIL_NAMESPACE
+
+// Returns true if value is negative, false otherwise.
+// Same as `value < 0` but doesn't produce warnings if T is an unsigned type.
+template <typename T, FMT_ENABLE_IF(is_signed<T>::value)>
+constexpr auto is_negative(T value) -> bool {
+ return value < 0;
+}
+template <typename T, FMT_ENABLE_IF(!is_signed<T>::value)>
+constexpr auto is_negative(T) -> bool {
+ return false;
+}
+
+template <typename T>
+FMT_CONSTEXPR auto is_supported_floating_point(T) -> bool {
+ if (std::is_same<T, float>()) return FMT_USE_FLOAT;
+ if (std::is_same<T, double>()) return FMT_USE_DOUBLE;
+ if (std::is_same<T, long double>()) return FMT_USE_LONG_DOUBLE;
+ return true;
+}
+
+// Smallest of uint32_t, uint64_t, uint128_t that is large enough to
+// represent all values of an integral type T.
+template <typename T>
+using uint32_or_64_or_128_t =
+ conditional_t<num_bits<T>() <= 32 && !FMT_REDUCE_INT_INSTANTIATIONS,
+ uint32_t,
+ conditional_t<num_bits<T>() <= 64, uint64_t, uint128_t>>;
+template <typename T>
+using uint64_or_128_t = conditional_t<num_bits<T>() <= 64, uint64_t, uint128_t>;
+
+#define FMT_POWERS_OF_10(factor) \
+ factor * 10, (factor)*100, (factor)*1000, (factor)*10000, (factor)*100000, \
+ (factor)*1000000, (factor)*10000000, (factor)*100000000, \
+ (factor)*1000000000
+
+// Converts value in the range [0, 100) to a string.
+constexpr const char* digits2(size_t value) {
+ // GCC generates slightly better code when value is pointer-size.
+ return &"0001020304050607080910111213141516171819"
+ "2021222324252627282930313233343536373839"
+ "4041424344454647484950515253545556575859"
+ "6061626364656667686970717273747576777879"
+ "8081828384858687888990919293949596979899"[value * 2];
+}
+
+// Sign is a template parameter to workaround a bug in gcc 4.8.
+template <typename Char, typename Sign> constexpr Char sign(Sign s) {
+#if !FMT_GCC_VERSION || FMT_GCC_VERSION >= 604
+ static_assert(std::is_same<Sign, sign_t>::value, "");
+#endif
+ return static_cast<Char>("\0-+ "[s]);
+}
+
+template <typename T> FMT_CONSTEXPR auto count_digits_fallback(T n) -> int {
+ int count = 1;
+ for (;;) {
+ // Integer division is slow so do it for a group of four digits instead
+ // of for every digit. The idea comes from the talk by Alexandrescu
+ // "Three Optimization Tips for C++". See speed-test for a comparison.
+ if (n < 10) return count;
+ if (n < 100) return count + 1;
+ if (n < 1000) return count + 2;
+ if (n < 10000) return count + 3;
+ n /= 10000u;
+ count += 4;
+ }
+}
+#if FMT_USE_INT128
+FMT_CONSTEXPR inline auto count_digits(uint128_opt n) -> int {
+ return count_digits_fallback(n);
+}
+#endif
+
+#ifdef FMT_BUILTIN_CLZLL
+// It is a separate function rather than a part of count_digits to workaround
+// the lack of static constexpr in constexpr functions.
+inline auto do_count_digits(uint64_t n) -> int {
+ // This has comparable performance to the version by Kendall Willets
+ // (https://github.com/fmtlib/format-benchmark/blob/master/digits10)
+ // but uses smaller tables.
+ // Maps bsr(n) to ceil(log10(pow(2, bsr(n) + 1) - 1)).
+ static constexpr uint8_t bsr2log10[] = {
+ 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5,
+ 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9, 10, 10, 10,
+ 10, 11, 11, 11, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 15, 15,
+ 15, 16, 16, 16, 16, 17, 17, 17, 18, 18, 18, 19, 19, 19, 19, 20};
+ auto t = bsr2log10[FMT_BUILTIN_CLZLL(n | 1) ^ 63];
+ static constexpr const uint64_t zero_or_powers_of_10[] = {
+ 0, 0, FMT_POWERS_OF_10(1U), FMT_POWERS_OF_10(1000000000ULL),
+ 10000000000000000000ULL};
+ return t - (n < zero_or_powers_of_10[t]);
+}
+#endif
+
+// Returns the number of decimal digits in n. Leading zeros are not counted
+// except for n == 0 in which case count_digits returns 1.
+FMT_CONSTEXPR20 inline auto count_digits(uint64_t n) -> int {
+#ifdef FMT_BUILTIN_CLZLL
+ if (!is_constant_evaluated()) {
+ return do_count_digits(n);
+ }
+#endif
+ return count_digits_fallback(n);
+}
+
+// Counts the number of digits in n. BITS = log2(radix).
+template <int BITS, typename UInt>
+FMT_CONSTEXPR auto count_digits(UInt n) -> int {
+#ifdef FMT_BUILTIN_CLZ
+ if (!is_constant_evaluated() && num_bits<UInt>() == 32)
+ return (FMT_BUILTIN_CLZ(static_cast<uint32_t>(n) | 1) ^ 31) / BITS + 1;
+#endif
+ // Lambda avoids unreachable code warnings from NVHPC.
+ return [](UInt m) {
+ int num_digits = 0;
+ do {
+ ++num_digits;
+ } while ((m >>= BITS) != 0);
+ return num_digits;
+ }(n);
+}
+
+#ifdef FMT_BUILTIN_CLZ
+// It is a separate function rather than a part of count_digits to workaround
+// the lack of static constexpr in constexpr functions.
+FMT_INLINE auto do_count_digits(uint32_t n) -> int {
+// An optimization by Kendall Willets from https://bit.ly/3uOIQrB.
+// This increments the upper 32 bits (log10(T) - 1) when >= T is added.
+# define FMT_INC(T) (((sizeof(# T) - 1ull) << 32) - T)
+ static constexpr uint64_t table[] = {
+ FMT_INC(0), FMT_INC(0), FMT_INC(0), // 8
+ FMT_INC(10), FMT_INC(10), FMT_INC(10), // 64
+ FMT_INC(100), FMT_INC(100), FMT_INC(100), // 512
+ FMT_INC(1000), FMT_INC(1000), FMT_INC(1000), // 4096
+ FMT_INC(10000), FMT_INC(10000), FMT_INC(10000), // 32k
+ FMT_INC(100000), FMT_INC(100000), FMT_INC(100000), // 256k
+ FMT_INC(1000000), FMT_INC(1000000), FMT_INC(1000000), // 2048k
+ FMT_INC(10000000), FMT_INC(10000000), FMT_INC(10000000), // 16M
+ FMT_INC(100000000), FMT_INC(100000000), FMT_INC(100000000), // 128M
+ FMT_INC(1000000000), FMT_INC(1000000000), FMT_INC(1000000000), // 1024M
+ FMT_INC(1000000000), FMT_INC(1000000000) // 4B
+ };
+ auto inc = table[FMT_BUILTIN_CLZ(n | 1) ^ 31];
+ return static_cast<int>((n + inc) >> 32);
+}
+#endif
+
+// Optional version of count_digits for better performance on 32-bit platforms.
+FMT_CONSTEXPR20 inline auto count_digits(uint32_t n) -> int {
+#ifdef FMT_BUILTIN_CLZ
+ if (!is_constant_evaluated()) {
+ return do_count_digits(n);
+ }
+#endif
+ return count_digits_fallback(n);
+}
+
+template <typename Int> constexpr auto digits10() noexcept -> int {
+ return std::numeric_limits<Int>::digits10;
+}
+template <> constexpr auto digits10<int128_opt>() noexcept -> int { return 38; }
+template <> constexpr auto digits10<uint128_t>() noexcept -> int { return 38; }
+
+template <typename Char> struct thousands_sep_result {
+ std::string grouping;
+ Char thousands_sep;
+};
+
+template <typename Char>
+FMT_API auto thousands_sep_impl(locale_ref loc) -> thousands_sep_result<Char>;
+template <typename Char>
+inline auto thousands_sep(locale_ref loc) -> thousands_sep_result<Char> {
+ auto result = thousands_sep_impl<char>(loc);
+ return {result.grouping, Char(result.thousands_sep)};
+}
+template <>
+inline auto thousands_sep(locale_ref loc) -> thousands_sep_result<wchar_t> {
+ return thousands_sep_impl<wchar_t>(loc);
+}
+
+template <typename Char>
+FMT_API auto decimal_point_impl(locale_ref loc) -> Char;
+template <typename Char> inline auto decimal_point(locale_ref loc) -> Char {
+ return Char(decimal_point_impl<char>(loc));
+}
+template <> inline auto decimal_point(locale_ref loc) -> wchar_t {
+ return decimal_point_impl<wchar_t>(loc);
+}
+
+// Compares two characters for equality.
+template <typename Char> auto equal2(const Char* lhs, const char* rhs) -> bool {
+ return lhs[0] == Char(rhs[0]) && lhs[1] == Char(rhs[1]);
+}
+inline auto equal2(const char* lhs, const char* rhs) -> bool {
+ return memcmp(lhs, rhs, 2) == 0;
+}
+
+// Copies two characters from src to dst.
+template <typename Char>
+FMT_CONSTEXPR20 FMT_INLINE void copy2(Char* dst, const char* src) {
+ if (!is_constant_evaluated() && sizeof(Char) == sizeof(char)) {
+ memcpy(dst, src, 2);
+ return;
+ }
+ *dst++ = static_cast<Char>(*src++);
+ *dst = static_cast<Char>(*src);
+}
+
+template <typename Iterator> struct format_decimal_result {
+ Iterator begin;
+ Iterator end;
+};
+
+// Formats a decimal unsigned integer value writing into out pointing to a
+// buffer of specified size. The caller must ensure that the buffer is large
+// enough.
+template <typename Char, typename UInt>
+FMT_CONSTEXPR20 auto format_decimal(Char* out, UInt value, int size)
+ -> format_decimal_result<Char*> {
+ FMT_ASSERT(size >= count_digits(value), "invalid digit count");
+ out += size;
+ Char* end = out;
+ while (value >= 100) {
+ // Integer division is slow so do it for a group of two digits instead
+ // of for every digit. The idea comes from the talk by Alexandrescu
+ // "Three Optimization Tips for C++". See speed-test for a comparison.
+ out -= 2;
+ copy2(out, digits2(static_cast<size_t>(value % 100)));
+ value /= 100;
+ }
+ if (value < 10) {
+ *--out = static_cast<Char>('0' + value);
+ return {out, end};
+ }
+ out -= 2;
+ copy2(out, digits2(static_cast<size_t>(value)));
+ return {out, end};
+}
+
+template <typename Char, typename UInt, typename Iterator,
+ FMT_ENABLE_IF(!std::is_pointer<remove_cvref_t<Iterator>>::value)>
+FMT_CONSTEXPR inline auto format_decimal(Iterator out, UInt value, int size)
+ -> format_decimal_result<Iterator> {
+ // Buffer is large enough to hold all digits (digits10 + 1).
+ Char buffer[digits10<UInt>() + 1] = {};
+ auto end = format_decimal(buffer, value, size).end;
+ return {out, detail::copy_str_noinline<Char>(buffer, end, out)};
+}
+
+template <unsigned BASE_BITS, typename Char, typename UInt>
+FMT_CONSTEXPR auto format_uint(Char* buffer, UInt value, int num_digits,
+ bool upper = false) -> Char* {
+ buffer += num_digits;
+ Char* end = buffer;
+ do {
+ const char* digits = upper ? "0123456789ABCDEF" : "0123456789abcdef";
+ unsigned digit = static_cast<unsigned>(value & ((1 << BASE_BITS) - 1));
+ *--buffer = static_cast<Char>(BASE_BITS < 4 ? static_cast<char>('0' + digit)
+ : digits[digit]);
+ } while ((value >>= BASE_BITS) != 0);
+ return end;
+}
+
+template <unsigned BASE_BITS, typename Char, typename It, typename UInt>
+inline auto format_uint(It out, UInt value, int num_digits, bool upper = false)
+ -> It {
+ if (auto ptr = to_pointer<Char>(out, to_unsigned(num_digits))) {
+ format_uint<BASE_BITS>(ptr, value, num_digits, upper);
+ return out;
+ }
+ // Buffer should be large enough to hold all digits (digits / BASE_BITS + 1).
+ char buffer[num_bits<UInt>() / BASE_BITS + 1];
+ format_uint<BASE_BITS>(buffer, value, num_digits, upper);
+ return detail::copy_str_noinline<Char>(buffer, buffer + num_digits, out);
+}
+
+// A converter from UTF-8 to UTF-16.
+class utf8_to_utf16 {
+ private:
+ basic_memory_buffer<wchar_t> buffer_;
+
+ public:
+ FMT_API explicit utf8_to_utf16(string_view s);
+ operator basic_string_view<wchar_t>() const { return {&buffer_[0], size()}; }
+ auto size() const -> size_t { return buffer_.size() - 1; }
+ auto c_str() const -> const wchar_t* { return &buffer_[0]; }
+ auto str() const -> std::wstring { return {&buffer_[0], size()}; }
+};
+
+// A converter from UTF-16/UTF-32 (host endian) to UTF-8.
+template <typename WChar, typename Buffer = memory_buffer>
+class unicode_to_utf8 {
+ private:
+ Buffer buffer_;
+
+ public:
+ unicode_to_utf8() {}
+ explicit unicode_to_utf8(basic_string_view<WChar> s) {
+ static_assert(sizeof(WChar) == 2 || sizeof(WChar) == 4,
+ "Expect utf16 or utf32");
+
+ if (!convert(s))
+ FMT_THROW(std::runtime_error(sizeof(WChar) == 2 ? "invalid utf16"
+ : "invalid utf32"));
+ }
+ operator string_view() const { return string_view(&buffer_[0], size()); }
+ size_t size() const { return buffer_.size() - 1; }
+ const char* c_str() const { return &buffer_[0]; }
+ std::string str() const { return std::string(&buffer_[0], size()); }
+
+ // Performs conversion returning a bool instead of throwing exception on
+ // conversion error. This method may still throw in case of memory allocation
+ // error.
+ bool convert(basic_string_view<WChar> s) {
+ if (!convert(buffer_, s)) return false;
+ buffer_.push_back(0);
+ return true;
+ }
+ static bool convert(Buffer& buf, basic_string_view<WChar> s) {
+ for (auto p = s.begin(); p != s.end(); ++p) {
+ uint32_t c = static_cast<uint32_t>(*p);
+ if (sizeof(WChar) == 2 && c >= 0xd800 && c <= 0xdfff) {
+ // surrogate pair
+ ++p;
+ if (p == s.end() || (c & 0xfc00) != 0xd800 || (*p & 0xfc00) != 0xdc00) {
+ return false;
+ }
+ c = (c << 10) + static_cast<uint32_t>(*p) - 0x35fdc00;
+ }
+ if (c < 0x80) {
+ buf.push_back(static_cast<char>(c));
+ } else if (c < 0x800) {
+ buf.push_back(static_cast<char>(0xc0 | (c >> 6)));
+ buf.push_back(static_cast<char>(0x80 | (c & 0x3f)));
+ } else if ((c >= 0x800 && c <= 0xd7ff) || (c >= 0xe000 && c <= 0xffff)) {
+ buf.push_back(static_cast<char>(0xe0 | (c >> 12)));
+ buf.push_back(static_cast<char>(0x80 | ((c & 0xfff) >> 6)));
+ buf.push_back(static_cast<char>(0x80 | (c & 0x3f)));
+ } else if (c >= 0x10000 && c <= 0x10ffff) {
+ buf.push_back(static_cast<char>(0xf0 | (c >> 18)));
+ buf.push_back(static_cast<char>(0x80 | ((c & 0x3ffff) >> 12)));
+ buf.push_back(static_cast<char>(0x80 | ((c & 0xfff) >> 6)));
+ buf.push_back(static_cast<char>(0x80 | (c & 0x3f)));
+ } else {
+ return false;
+ }
+ }
+ return true;
+ }
+};
+
+// Computes 128-bit result of multiplication of two 64-bit unsigned integers.
+inline uint128_fallback umul128(uint64_t x, uint64_t y) noexcept {
+#if FMT_USE_INT128
+ auto p = static_cast<uint128_opt>(x) * static_cast<uint128_opt>(y);
+ return {static_cast<uint64_t>(p >> 64), static_cast<uint64_t>(p)};
+#elif defined(_MSC_VER) && defined(_M_X64)
+ auto result = uint128_fallback();
+ result.lo_ = _umul128(x, y, &result.hi_);
+ return result;
+#else
+ const uint64_t mask = static_cast<uint64_t>(max_value<uint32_t>());
+
+ uint64_t a = x >> 32;
+ uint64_t b = x & mask;
+ uint64_t c = y >> 32;
+ uint64_t d = y & mask;
+
+ uint64_t ac = a * c;
+ uint64_t bc = b * c;
+ uint64_t ad = a * d;
+ uint64_t bd = b * d;
+
+ uint64_t intermediate = (bd >> 32) + (ad & mask) + (bc & mask);
+
+ return {ac + (intermediate >> 32) + (ad >> 32) + (bc >> 32),
+ (intermediate << 32) + (bd & mask)};
+#endif
+}
+
+namespace dragonbox {
+// Computes floor(log10(pow(2, e))) for e in [-2620, 2620] using the method from
+// https://fmt.dev/papers/Dragonbox.pdf#page=28, section 6.1.
+inline int floor_log10_pow2(int e) noexcept {
+ FMT_ASSERT(e <= 2620 && e >= -2620, "too large exponent");
+ static_assert((-1 >> 1) == -1, "right shift is not arithmetic");
+ return (e * 315653) >> 20;
+}
+
+inline int floor_log2_pow10(int e) noexcept {
+ FMT_ASSERT(e <= 1233 && e >= -1233, "too large exponent");
+ return (e * 1741647) >> 19;
+}
+
+// Computes upper 64 bits of multiplication of two 64-bit unsigned integers.
+inline uint64_t umul128_upper64(uint64_t x, uint64_t y) noexcept {
+#if FMT_USE_INT128
+ auto p = static_cast<uint128_opt>(x) * static_cast<uint128_opt>(y);
+ return static_cast<uint64_t>(p >> 64);
+#elif defined(_MSC_VER) && defined(_M_X64)
+ return __umulh(x, y);
+#else
+ return umul128(x, y).high();
+#endif
+}
+
+// Computes upper 128 bits of multiplication of a 64-bit unsigned integer and a
+// 128-bit unsigned integer.
+inline uint128_fallback umul192_upper128(uint64_t x,
+ uint128_fallback y) noexcept {
+ uint128_fallback r = umul128(x, y.high());
+ r += umul128_upper64(x, y.low());
+ return r;
+}
+
+FMT_API uint128_fallback get_cached_power(int k) noexcept;
+
+// Type-specific information that Dragonbox uses.
+template <typename T, typename Enable = void> struct float_info;
+
+template <> struct float_info<float> {
+ using carrier_uint = uint32_t;
+ static const int exponent_bits = 8;
+ static const int kappa = 1;
+ static const int big_divisor = 100;
+ static const int small_divisor = 10;
+ static const int min_k = -31;
+ static const int max_k = 46;
+ static const int shorter_interval_tie_lower_threshold = -35;
+ static const int shorter_interval_tie_upper_threshold = -35;
+};
+
+template <> struct float_info<double> {
+ using carrier_uint = uint64_t;
+ static const int exponent_bits = 11;
+ static const int kappa = 2;
+ static const int big_divisor = 1000;
+ static const int small_divisor = 100;
+ static const int min_k = -292;
+ static const int max_k = 341;
+ static const int shorter_interval_tie_lower_threshold = -77;
+ static const int shorter_interval_tie_upper_threshold = -77;
+};
+
+// An 80- or 128-bit floating point number.
+template <typename T>
+struct float_info<T, enable_if_t<std::numeric_limits<T>::digits == 64 ||
+ std::numeric_limits<T>::digits == 113 ||
+ is_float128<T>::value>> {
+ using carrier_uint = detail::uint128_t;
+ static const int exponent_bits = 15;
+};
+
+// A double-double floating point number.
+template <typename T>
+struct float_info<T, enable_if_t<is_double_double<T>::value>> {
+ using carrier_uint = detail::uint128_t;
+};
+
+template <typename T> struct decimal_fp {
+ using significand_type = typename float_info<T>::carrier_uint;
+ significand_type significand;
+ int exponent;
+};
+
+template <typename T> FMT_API auto to_decimal(T x) noexcept -> decimal_fp<T>;
+} // namespace dragonbox
+
+// Returns true iff Float has the implicit bit which is not stored.
+template <typename Float> constexpr bool has_implicit_bit() {
+ // An 80-bit FP number has a 64-bit significand an no implicit bit.
+ return std::numeric_limits<Float>::digits != 64;
+}
+
+// Returns the number of significand bits stored in Float. The implicit bit is
+// not counted since it is not stored.
+template <typename Float> constexpr int num_significand_bits() {
+ // std::numeric_limits may not support __float128.
+ return is_float128<Float>() ? 112
+ : (std::numeric_limits<Float>::digits -
+ (has_implicit_bit<Float>() ? 1 : 0));
+}
+
+template <typename Float>
+constexpr auto exponent_mask() ->
+ typename dragonbox::float_info<Float>::carrier_uint {
+ using float_uint = typename dragonbox::float_info<Float>::carrier_uint;
+ return ((float_uint(1) << dragonbox::float_info<Float>::exponent_bits) - 1)
+ << num_significand_bits<Float>();
+}
+template <typename Float> constexpr auto exponent_bias() -> int {
+ // std::numeric_limits may not support __float128.
+ return is_float128<Float>() ? 16383
+ : std::numeric_limits<Float>::max_exponent - 1;
+}
+
+// Writes the exponent exp in the form "[+-]d{2,3}" to buffer.
+template <typename Char, typename It>
+FMT_CONSTEXPR auto write_exponent(int exp, It it) -> It {
+ FMT_ASSERT(-10000 < exp && exp < 10000, "exponent out of range");
+ if (exp < 0) {
+ *it++ = static_cast<Char>('-');
+ exp = -exp;
+ } else {
+ *it++ = static_cast<Char>('+');
+ }
+ if (exp >= 100) {
+ const char* top = digits2(to_unsigned(exp / 100));
+ if (exp >= 1000) *it++ = static_cast<Char>(top[0]);
+ *it++ = static_cast<Char>(top[1]);
+ exp %= 100;
+ }
+ const char* d = digits2(to_unsigned(exp));
+ *it++ = static_cast<Char>(d[0]);
+ *it++ = static_cast<Char>(d[1]);
+ return it;
+}
+
+// A floating-point number f * pow(2, e) where F is an unsigned type.
+template <typename F> struct basic_fp {
+ F f;
+ int e;
+
+ static constexpr const int num_significand_bits =
+ static_cast<int>(sizeof(F) * num_bits<unsigned char>());
+
+ constexpr basic_fp() : f(0), e(0) {}
+ constexpr basic_fp(uint64_t f_val, int e_val) : f(f_val), e(e_val) {}
+
+ // Constructs fp from an IEEE754 floating-point number.
+ template <typename Float> FMT_CONSTEXPR basic_fp(Float n) { assign(n); }
+
+ // Assigns n to this and return true iff predecessor is closer than successor.
+ template <typename Float, FMT_ENABLE_IF(!is_double_double<Float>::value)>
+ FMT_CONSTEXPR auto assign(Float n) -> bool {
+ static_assert(std::numeric_limits<Float>::digits <= 113, "unsupported FP");
+ // Assume Float is in the format [sign][exponent][significand].
+ using carrier_uint = typename dragonbox::float_info<Float>::carrier_uint;
+ const auto num_float_significand_bits =
+ detail::num_significand_bits<Float>();
+ const auto implicit_bit = carrier_uint(1) << num_float_significand_bits;
+ const auto significand_mask = implicit_bit - 1;
+ auto u = bit_cast<carrier_uint>(n);
+ f = static_cast<F>(u & significand_mask);
+ auto biased_e = static_cast<int>((u & exponent_mask<Float>()) >>
+ num_float_significand_bits);
+ // The predecessor is closer if n is a normalized power of 2 (f == 0)
+ // other than the smallest normalized number (biased_e > 1).
+ auto is_predecessor_closer = f == 0 && biased_e > 1;
+ if (biased_e == 0)
+ biased_e = 1; // Subnormals use biased exponent 1 (min exponent).
+ else if (has_implicit_bit<Float>())
+ f += static_cast<F>(implicit_bit);
+ e = biased_e - exponent_bias<Float>() - num_float_significand_bits;
+ if (!has_implicit_bit<Float>()) ++e;
+ return is_predecessor_closer;
+ }
+
+ template <typename Float, FMT_ENABLE_IF(is_double_double<Float>::value)>
+ FMT_CONSTEXPR auto assign(Float n) -> bool {
+ static_assert(std::numeric_limits<double>::is_iec559, "unsupported FP");
+ return assign(static_cast<double>(n));
+ }
+};
+
+using fp = basic_fp<unsigned long long>;
+
+// Normalizes the value converted from double and multiplied by (1 << SHIFT).
+template <int SHIFT = 0, typename F>
+FMT_CONSTEXPR basic_fp<F> normalize(basic_fp<F> value) {
+ // Handle subnormals.
+ const auto implicit_bit = F(1) << num_significand_bits<double>();
+ const auto shifted_implicit_bit = implicit_bit << SHIFT;
+ while ((value.f & shifted_implicit_bit) == 0) {
+ value.f <<= 1;
+ --value.e;
+ }
+ // Subtract 1 to account for hidden bit.
+ const auto offset = basic_fp<F>::num_significand_bits -
+ num_significand_bits<double>() - SHIFT - 1;
+ value.f <<= offset;
+ value.e -= offset;
+ return value;
+}
+
+// Computes lhs * rhs / pow(2, 64) rounded to nearest with half-up tie breaking.
+FMT_CONSTEXPR inline uint64_t multiply(uint64_t lhs, uint64_t rhs) {
+#if FMT_USE_INT128
+ auto product = static_cast<__uint128_t>(lhs) * rhs;
+ auto f = static_cast<uint64_t>(product >> 64);
+ return (static_cast<uint64_t>(product) & (1ULL << 63)) != 0 ? f + 1 : f;
+#else
+ // Multiply 32-bit parts of significands.
+ uint64_t mask = (1ULL << 32) - 1;
+ uint64_t a = lhs >> 32, b = lhs & mask;
+ uint64_t c = rhs >> 32, d = rhs & mask;
+ uint64_t ac = a * c, bc = b * c, ad = a * d, bd = b * d;
+ // Compute mid 64-bit of result and round.
+ uint64_t mid = (bd >> 32) + (ad & mask) + (bc & mask) + (1U << 31);
+ return ac + (ad >> 32) + (bc >> 32) + (mid >> 32);
+#endif
+}
+
+FMT_CONSTEXPR inline fp operator*(fp x, fp y) {
+ return {multiply(x.f, y.f), x.e + y.e + 64};
+}
+
+template <typename T = void> struct basic_data {
+ // Normalized 64-bit significands of pow(10, k), for k = -348, -340, ..., 340.
+ // These are generated by support/compute-powers.py.
+ static constexpr uint64_t pow10_significands[87] = {
+ 0xfa8fd5a0081c0288, 0xbaaee17fa23ebf76, 0x8b16fb203055ac76,
+ 0xcf42894a5dce35ea, 0x9a6bb0aa55653b2d, 0xe61acf033d1a45df,
+ 0xab70fe17c79ac6ca, 0xff77b1fcbebcdc4f, 0xbe5691ef416bd60c,
+ 0x8dd01fad907ffc3c, 0xd3515c2831559a83, 0x9d71ac8fada6c9b5,
+ 0xea9c227723ee8bcb, 0xaecc49914078536d, 0x823c12795db6ce57,
+ 0xc21094364dfb5637, 0x9096ea6f3848984f, 0xd77485cb25823ac7,
+ 0xa086cfcd97bf97f4, 0xef340a98172aace5, 0xb23867fb2a35b28e,
+ 0x84c8d4dfd2c63f3b, 0xc5dd44271ad3cdba, 0x936b9fcebb25c996,
+ 0xdbac6c247d62a584, 0xa3ab66580d5fdaf6, 0xf3e2f893dec3f126,
+ 0xb5b5ada8aaff80b8, 0x87625f056c7c4a8b, 0xc9bcff6034c13053,
+ 0x964e858c91ba2655, 0xdff9772470297ebd, 0xa6dfbd9fb8e5b88f,
+ 0xf8a95fcf88747d94, 0xb94470938fa89bcf, 0x8a08f0f8bf0f156b,
+ 0xcdb02555653131b6, 0x993fe2c6d07b7fac, 0xe45c10c42a2b3b06,
+ 0xaa242499697392d3, 0xfd87b5f28300ca0e, 0xbce5086492111aeb,
+ 0x8cbccc096f5088cc, 0xd1b71758e219652c, 0x9c40000000000000,
+ 0xe8d4a51000000000, 0xad78ebc5ac620000, 0x813f3978f8940984,
+ 0xc097ce7bc90715b3, 0x8f7e32ce7bea5c70, 0xd5d238a4abe98068,
+ 0x9f4f2726179a2245, 0xed63a231d4c4fb27, 0xb0de65388cc8ada8,
+ 0x83c7088e1aab65db, 0xc45d1df942711d9a, 0x924d692ca61be758,
+ 0xda01ee641a708dea, 0xa26da3999aef774a, 0xf209787bb47d6b85,
+ 0xb454e4a179dd1877, 0x865b86925b9bc5c2, 0xc83553c5c8965d3d,
+ 0x952ab45cfa97a0b3, 0xde469fbd99a05fe3, 0xa59bc234db398c25,
+ 0xf6c69a72a3989f5c, 0xb7dcbf5354e9bece, 0x88fcf317f22241e2,
+ 0xcc20ce9bd35c78a5, 0x98165af37b2153df, 0xe2a0b5dc971f303a,
+ 0xa8d9d1535ce3b396, 0xfb9b7cd9a4a7443c, 0xbb764c4ca7a44410,
+ 0x8bab8eefb6409c1a, 0xd01fef10a657842c, 0x9b10a4e5e9913129,
+ 0xe7109bfba19c0c9d, 0xac2820d9623bf429, 0x80444b5e7aa7cf85,
+ 0xbf21e44003acdd2d, 0x8e679c2f5e44ff8f, 0xd433179d9c8cb841,
+ 0x9e19db92b4e31ba9, 0xeb96bf6ebadf77d9, 0xaf87023b9bf0ee6b,
+ };
+
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
+# pragma GCC diagnostic push
+# pragma GCC diagnostic ignored "-Wnarrowing"
+#endif
+ // Binary exponents of pow(10, k), for k = -348, -340, ..., 340, corresponding
+ // to significands above.
+ static constexpr int16_t pow10_exponents[87] = {
+ -1220, -1193, -1166, -1140, -1113, -1087, -1060, -1034, -1007, -980, -954,
+ -927, -901, -874, -847, -821, -794, -768, -741, -715, -688, -661,
+ -635, -608, -582, -555, -529, -502, -475, -449, -422, -396, -369,
+ -343, -316, -289, -263, -236, -210, -183, -157, -130, -103, -77,
+ -50, -24, 3, 30, 56, 83, 109, 136, 162, 189, 216,
+ 242, 269, 295, 322, 348, 375, 402, 428, 455, 481, 508,
+ 534, 561, 588, 614, 641, 667, 694, 720, 747, 774, 800,
+ 827, 853, 880, 907, 933, 960, 986, 1013, 1039, 1066};
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
+# pragma GCC diagnostic pop
+#endif
+
+ static constexpr uint64_t power_of_10_64[20] = {
+ 1, FMT_POWERS_OF_10(1ULL), FMT_POWERS_OF_10(1000000000ULL),
+ 10000000000000000000ULL};
+
+ // For checking rounding thresholds.
+ // The kth entry is chosen to be the smallest integer such that the
+ // upper 32-bits of 10^(k+1) times it is strictly bigger than 5 * 10^k.
+ static constexpr uint32_t fractional_part_rounding_thresholds[8] = {
+ 2576980378, // ceil(2^31 + 2^32/10^1)
+ 2190433321, // ceil(2^31 + 2^32/10^2)
+ 2151778616, // ceil(2^31 + 2^32/10^3)
+ 2147913145, // ceil(2^31 + 2^32/10^4)
+ 2147526598, // ceil(2^31 + 2^32/10^5)
+ 2147487943, // ceil(2^31 + 2^32/10^6)
+ 2147484078, // ceil(2^31 + 2^32/10^7)
+ 2147483691 // ceil(2^31 + 2^32/10^8)
+ };
+};
+
+#if FMT_CPLUSPLUS < 201703L
+template <typename T> constexpr uint64_t basic_data<T>::pow10_significands[];
+template <typename T> constexpr int16_t basic_data<T>::pow10_exponents[];
+template <typename T> constexpr uint64_t basic_data<T>::power_of_10_64[];
+template <typename T>
+constexpr uint32_t basic_data<T>::fractional_part_rounding_thresholds[];
+#endif
+
+// This is a struct rather than an alias to avoid shadowing warnings in gcc.
+struct data : basic_data<> {};
+
+// Returns a cached power of 10 `c_k = c_k.f * pow(2, c_k.e)` such that its
+// (binary) exponent satisfies `min_exponent <= c_k.e <= min_exponent + 28`.
+FMT_CONSTEXPR inline fp get_cached_power(int min_exponent,
+ int& pow10_exponent) {
+ const int shift = 32;
+ // log10(2) = 0x0.4d104d427de7fbcc...
+ const int64_t significand = 0x4d104d427de7fbcc;
+ int index = static_cast<int>(
+ ((min_exponent + fp::num_significand_bits - 1) * (significand >> shift) +
+ ((int64_t(1) << shift) - 1)) // ceil
+ >> 32 // arithmetic shift
+ );
+ // Decimal exponent of the first (smallest) cached power of 10.
+ const int first_dec_exp = -348;
+ // Difference between 2 consecutive decimal exponents in cached powers of 10.
+ const int dec_exp_step = 8;
+ index = (index - first_dec_exp - 1) / dec_exp_step + 1;
+ pow10_exponent = first_dec_exp + index * dec_exp_step;
+ // Using *(x + index) instead of x[index] avoids an issue with some compilers
+ // using the EDG frontend (e.g. nvhpc/22.3 in C++17 mode).
+ return {*(data::pow10_significands + index),
+ *(data::pow10_exponents + index)};
+}
+
+template <typename T>
+using convert_float_result =
+ conditional_t<std::is_same<T, float>::value ||
+ std::numeric_limits<T>::digits ==
+ std::numeric_limits<double>::digits,
+ double, T>;
+
+template <typename T>
+constexpr auto convert_float(T value) -> convert_float_result<T> {
+ return static_cast<convert_float_result<T>>(value);
+}
+
+template <typename OutputIt, typename Char>
+FMT_NOINLINE FMT_CONSTEXPR auto fill(OutputIt it, size_t n,
+ const fill_t<Char>& fill) -> OutputIt {
+ auto fill_size = fill.size();
+ if (fill_size == 1) return detail::fill_n(it, n, fill[0]);
+ auto data = fill.data();
+ for (size_t i = 0; i < n; ++i)
+ it = copy_str<Char>(data, data + fill_size, it);
+ return it;
+}
+
+// Writes the output of f, padded according to format specifications in specs.
+// size: output size in code units.
+// width: output display width in (terminal) column positions.
+template <align::type align = align::left, typename OutputIt, typename Char,
+ typename F>
+FMT_CONSTEXPR auto write_padded(OutputIt out, const format_specs<Char>& specs,
+ size_t size, size_t width, F&& f) -> OutputIt {
+ static_assert(align == align::left || align == align::right, "");
+ unsigned spec_width = to_unsigned(specs.width);
+ size_t padding = spec_width > width ? spec_width - width : 0;
+ // Shifts are encoded as string literals because static constexpr is not
+ // supported in constexpr functions.
+ auto* shifts = align == align::left ? "\x1f\x1f\x00\x01" : "\x00\x1f\x00\x01";
+ size_t left_padding = padding >> shifts[specs.align];
+ size_t right_padding = padding - left_padding;
+ auto it = reserve(out, size + padding * specs.fill.size());
+ if (left_padding != 0) it = fill(it, left_padding, specs.fill);
+ it = f(it);
+ if (right_padding != 0) it = fill(it, right_padding, specs.fill);
+ return base_iterator(out, it);
+}
+
+template <align::type align = align::left, typename OutputIt, typename Char,
+ typename F>
+constexpr auto write_padded(OutputIt out, const format_specs<Char>& specs,
+ size_t size, F&& f) -> OutputIt {
+ return write_padded<align>(out, specs, size, size, f);
+}
+
+template <align::type align = align::left, typename Char, typename OutputIt>
+FMT_CONSTEXPR auto write_bytes(OutputIt out, string_view bytes,
+ const format_specs<Char>& specs) -> OutputIt {
+ return write_padded<align>(
+ out, specs, bytes.size(), [bytes](reserve_iterator<OutputIt> it) {
+ const char* data = bytes.data();
+ return copy_str<Char>(data, data + bytes.size(), it);
+ });
+}
+
+template <typename Char, typename OutputIt, typename UIntPtr>
+auto write_ptr(OutputIt out, UIntPtr value, const format_specs<Char>* specs)
+ -> OutputIt {
+ int num_digits = count_digits<4>(value);
+ auto size = to_unsigned(num_digits) + size_t(2);
+ auto write = [=](reserve_iterator<OutputIt> it) {
+ *it++ = static_cast<Char>('0');
+ *it++ = static_cast<Char>('x');
+ return format_uint<4, Char>(it, value, num_digits);
+ };
+ return specs ? write_padded<align::right>(out, *specs, size, write)
+ : base_iterator(out, write(reserve(out, size)));
+}
+
+// Returns true iff the code point cp is printable.
+FMT_API auto is_printable(uint32_t cp) -> bool;
+
+inline auto needs_escape(uint32_t cp) -> bool {
+ return cp < 0x20 || cp == 0x7f || cp == '"' || cp == '\\' ||
+ !is_printable(cp);
+}
+
+template <typename Char> struct find_escape_result {
+ const Char* begin;
+ const Char* end;
+ uint32_t cp;
+};
+
+template <typename Char>
+using make_unsigned_char =
+ typename conditional_t<std::is_integral<Char>::value,
+ std::make_unsigned<Char>,
+ type_identity<uint32_t>>::type;
+
+template <typename Char>
+auto find_escape(const Char* begin, const Char* end)
+ -> find_escape_result<Char> {
+ for (; begin != end; ++begin) {
+ uint32_t cp = static_cast<make_unsigned_char<Char>>(*begin);
+ if (const_check(sizeof(Char) == 1) && cp >= 0x80) continue;
+ if (needs_escape(cp)) return {begin, begin + 1, cp};
+ }
+ return {begin, nullptr, 0};
+}
+
+inline auto find_escape(const char* begin, const char* end)
+ -> find_escape_result<char> {
+ if (!is_utf8()) return find_escape<char>(begin, end);
+ auto result = find_escape_result<char>{end, nullptr, 0};
+ for_each_codepoint(string_view(begin, to_unsigned(end - begin)),
+ [&](uint32_t cp, string_view sv) {
+ if (needs_escape(cp)) {
+ result = {sv.begin(), sv.end(), cp};
+ return false;
+ }
+ return true;
+ });
+ return result;
+}
+
+#define FMT_STRING_IMPL(s, base, explicit) \
+ [] { \
+ /* Use the hidden visibility as a workaround for a GCC bug (#1973). */ \
+ /* Use a macro-like name to avoid shadowing warnings. */ \
+ struct FMT_GCC_VISIBILITY_HIDDEN FMT_COMPILE_STRING : base { \
+ using char_type FMT_MAYBE_UNUSED = fmt::remove_cvref_t<decltype(s[0])>; \
+ FMT_MAYBE_UNUSED FMT_CONSTEXPR explicit \
+ operator fmt::basic_string_view<char_type>() const { \
+ return fmt::detail_exported::compile_string_to_view<char_type>(s); \
+ } \
+ }; \
+ return FMT_COMPILE_STRING(); \
+ }()
+
+/**
+ \rst
+ Constructs a compile-time format string from a string literal *s*.
+
+ **Example**::
+
+ // A compile-time error because 'd' is an invalid specifier for strings.
+ std::string s = fmt::format(FMT_STRING("{:d}"), "foo");
+ \endrst
+ */
+#define FMT_STRING(s) FMT_STRING_IMPL(s, fmt::detail::compile_string, )
+
+template <size_t width, typename Char, typename OutputIt>
+auto write_codepoint(OutputIt out, char prefix, uint32_t cp) -> OutputIt {
+ *out++ = static_cast<Char>('\\');
+ *out++ = static_cast<Char>(prefix);
+ Char buf[width];
+ fill_n(buf, width, static_cast<Char>('0'));
+ format_uint<4>(buf, cp, width);
+ return copy_str<Char>(buf, buf + width, out);
+}
+
+template <typename OutputIt, typename Char>
+auto write_escaped_cp(OutputIt out, const find_escape_result<Char>& escape)
+ -> OutputIt {
+ auto c = static_cast<Char>(escape.cp);
+ switch (escape.cp) {
+ case '\n':
+ *out++ = static_cast<Char>('\\');
+ c = static_cast<Char>('n');
+ break;
+ case '\r':
+ *out++ = static_cast<Char>('\\');
+ c = static_cast<Char>('r');
+ break;
+ case '\t':
+ *out++ = static_cast<Char>('\\');
+ c = static_cast<Char>('t');
+ break;
+ case '"':
+ FMT_FALLTHROUGH;
+ case '\'':
+ FMT_FALLTHROUGH;
+ case '\\':
+ *out++ = static_cast<Char>('\\');
+ break;
+ default:
+ if (escape.cp < 0x100) {
+ return write_codepoint<2, Char>(out, 'x', escape.cp);
+ }
+ if (escape.cp < 0x10000) {
+ return write_codepoint<4, Char>(out, 'u', escape.cp);
+ }
+ if (escape.cp < 0x110000) {
+ return write_codepoint<8, Char>(out, 'U', escape.cp);
+ }
+ for (Char escape_char : basic_string_view<Char>(
+ escape.begin, to_unsigned(escape.end - escape.begin))) {
+ out = write_codepoint<2, Char>(out, 'x',
+ static_cast<uint32_t>(escape_char) & 0xFF);
+ }
+ return out;
+ }
+ *out++ = c;
+ return out;
+}
+
+template <typename Char, typename OutputIt>
+auto write_escaped_string(OutputIt out, basic_string_view<Char> str)
+ -> OutputIt {
+ *out++ = static_cast<Char>('"');
+ auto begin = str.begin(), end = str.end();
+ do {
+ auto escape = find_escape(begin, end);
+ out = copy_str<Char>(begin, escape.begin, out);
+ begin = escape.end;
+ if (!begin) break;
+ out = write_escaped_cp<OutputIt, Char>(out, escape);
+ } while (begin != end);
+ *out++ = static_cast<Char>('"');
+ return out;
+}
+
+template <typename Char, typename OutputIt>
+auto write_escaped_char(OutputIt out, Char v) -> OutputIt {
+ *out++ = static_cast<Char>('\'');
+ if ((needs_escape(static_cast<uint32_t>(v)) && v != static_cast<Char>('"')) ||
+ v == static_cast<Char>('\'')) {
+ out = write_escaped_cp(
+ out, find_escape_result<Char>{&v, &v + 1, static_cast<uint32_t>(v)});
+ } else {
+ *out++ = v;
+ }
+ *out++ = static_cast<Char>('\'');
+ return out;
+}
+
+template <typename Char, typename OutputIt>
+FMT_CONSTEXPR auto write_char(OutputIt out, Char value,
+ const format_specs<Char>& specs) -> OutputIt {
+ bool is_debug = specs.type == presentation_type::debug;
+ return write_padded(out, specs, 1, [=](reserve_iterator<OutputIt> it) {
+ if (is_debug) return write_escaped_char(it, value);
+ *it++ = value;
+ return it;
+ });
+}
+template <typename Char, typename OutputIt>
+FMT_CONSTEXPR auto write(OutputIt out, Char value,
+ const format_specs<Char>& specs, locale_ref loc = {})
+ -> OutputIt {
+ // char is formatted as unsigned char for consistency across platforms.
+ using unsigned_type =
+ conditional_t<std::is_same<Char, char>::value, unsigned char, unsigned>;
+ return check_char_specs(specs)
+ ? write_char(out, value, specs)
+ : write(out, static_cast<unsigned_type>(value), specs, loc);
+}
+
+// Data for write_int that doesn't depend on output iterator type. It is used to
+// avoid template code bloat.
+template <typename Char> struct write_int_data {
+ size_t size;
+ size_t padding;
+
+ FMT_CONSTEXPR write_int_data(int num_digits, unsigned prefix,
+ const format_specs<Char>& specs)
+ : size((prefix >> 24) + to_unsigned(num_digits)), padding(0) {
+ if (specs.align == align::numeric) {
+ auto width = to_unsigned(specs.width);
+ if (width > size) {
+ padding = width - size;
+ size = width;
+ }
+ } else if (specs.precision > num_digits) {
+ size = (prefix >> 24) + to_unsigned(specs.precision);
+ padding = to_unsigned(specs.precision - num_digits);
+ }
+ }
+};
+
+// Writes an integer in the format
+// <left-padding><prefix><numeric-padding><digits><right-padding>
+// where <digits> are written by write_digits(it).
+// prefix contains chars in three lower bytes and the size in the fourth byte.
+template <typename OutputIt, typename Char, typename W>
+FMT_CONSTEXPR FMT_INLINE auto write_int(OutputIt out, int num_digits,
+ unsigned prefix,
+ const format_specs<Char>& specs,
+ W write_digits) -> OutputIt {
+ // Slightly faster check for specs.width == 0 && specs.precision == -1.
+ if ((specs.width | (specs.precision + 1)) == 0) {
+ auto it = reserve(out, to_unsigned(num_digits) + (prefix >> 24));
+ if (prefix != 0) {
+ for (unsigned p = prefix & 0xffffff; p != 0; p >>= 8)
+ *it++ = static_cast<Char>(p & 0xff);
+ }
+ return base_iterator(out, write_digits(it));
+ }
+ auto data = write_int_data<Char>(num_digits, prefix, specs);
+ return write_padded<align::right>(
+ out, specs, data.size, [=](reserve_iterator<OutputIt> it) {
+ for (unsigned p = prefix & 0xffffff; p != 0; p >>= 8)
+ *it++ = static_cast<Char>(p & 0xff);
+ it = detail::fill_n(it, data.padding, static_cast<Char>('0'));
+ return write_digits(it);
+ });
+}
+
+template <typename Char> class digit_grouping {
+ private:
+ std::string grouping_;
+ std::basic_string<Char> thousands_sep_;
+
+ struct next_state {
+ std::string::const_iterator group;
+ int pos;
+ };
+ next_state initial_state() const { return {grouping_.begin(), 0}; }
+
+ // Returns the next digit group separator position.
+ int next(next_state& state) const {
+ if (thousands_sep_.empty()) return max_value<int>();
+ if (state.group == grouping_.end()) return state.pos += grouping_.back();
+ if (*state.group <= 0 || *state.group == max_value<char>())
+ return max_value<int>();
+ state.pos += *state.group++;
+ return state.pos;
+ }
+
+ public:
+ explicit digit_grouping(locale_ref loc, bool localized = true) {
+ if (!localized) return;
+ auto sep = thousands_sep<Char>(loc);
+ grouping_ = sep.grouping;
+ if (sep.thousands_sep) thousands_sep_.assign(1, sep.thousands_sep);
+ }
+ digit_grouping(std::string grouping, std::basic_string<Char> sep)
+ : grouping_(std::move(grouping)), thousands_sep_(std::move(sep)) {}
+
+ bool has_separator() const { return !thousands_sep_.empty(); }
+
+ int count_separators(int num_digits) const {
+ int count = 0;
+ auto state = initial_state();
+ while (num_digits > next(state)) ++count;
+ return count;
+ }
+
+ // Applies grouping to digits and write the output to out.
+ template <typename Out, typename C>
+ Out apply(Out out, basic_string_view<C> digits) const {
+ auto num_digits = static_cast<int>(digits.size());
+ auto separators = basic_memory_buffer<int>();
+ separators.push_back(0);
+ auto state = initial_state();
+ while (int i = next(state)) {
+ if (i >= num_digits) break;
+ separators.push_back(i);
+ }
+ for (int i = 0, sep_index = static_cast<int>(separators.size() - 1);
+ i < num_digits; ++i) {
+ if (num_digits - i == separators[sep_index]) {
+ out =
+ copy_str<Char>(thousands_sep_.data(),
+ thousands_sep_.data() + thousands_sep_.size(), out);
+ --sep_index;
+ }
+ *out++ = static_cast<Char>(digits[to_unsigned(i)]);
+ }
+ return out;
+ }
+};
+
+// Writes a decimal integer with digit grouping.
+template <typename OutputIt, typename UInt, typename Char>
+auto write_int(OutputIt out, UInt value, unsigned prefix,
+ const format_specs<Char>& specs,
+ const digit_grouping<Char>& grouping) -> OutputIt {
+ static_assert(std::is_same<uint64_or_128_t<UInt>, UInt>::value, "");
+ int num_digits = count_digits(value);
+ char digits[40];
+ format_decimal(digits, value, num_digits);
+ unsigned size = to_unsigned((prefix != 0 ? 1 : 0) + num_digits +
+ grouping.count_separators(num_digits));
+ return write_padded<align::right>(
+ out, specs, size, size, [&](reserve_iterator<OutputIt> it) {
+ if (prefix != 0) {
+ char sign = static_cast<char>(prefix);
+ *it++ = static_cast<Char>(sign);
+ }
+ return grouping.apply(it, string_view(digits, to_unsigned(num_digits)));
+ });
+}
+
+// Writes a localized value.
+FMT_API auto write_loc(appender out, loc_value value,
+ const format_specs<>& specs, locale_ref loc) -> bool;
+template <typename OutputIt, typename Char>
+inline auto write_loc(OutputIt, loc_value, const format_specs<Char>&,
+ locale_ref) -> bool {
+ return false;
+}
+
+FMT_CONSTEXPR inline void prefix_append(unsigned& prefix, unsigned value) {
+ prefix |= prefix != 0 ? value << 8 : value;
+ prefix += (1u + (value > 0xff ? 1 : 0)) << 24;
+}
+
+template <typename UInt> struct write_int_arg {
+ UInt abs_value;
+ unsigned prefix;
+};
+
+template <typename T>
+FMT_CONSTEXPR auto make_write_int_arg(T value, sign_t sign)
+ -> write_int_arg<uint32_or_64_or_128_t<T>> {
+ auto prefix = 0u;
+ auto abs_value = static_cast<uint32_or_64_or_128_t<T>>(value);
+ if (is_negative(value)) {
+ prefix = 0x01000000 | '-';
+ abs_value = 0 - abs_value;
+ } else {
+ constexpr const unsigned prefixes[4] = {0, 0, 0x1000000u | '+',
+ 0x1000000u | ' '};
+ prefix = prefixes[sign];
+ }
+ return {abs_value, prefix};
+}
+
+template <typename Char = char> struct loc_writer {
+ buffer_appender<Char> out;
+ const format_specs<Char>& specs;
+ std::basic_string<Char> sep;
+ std::string grouping;
+ std::basic_string<Char> decimal_point;
+
+ template <typename T, FMT_ENABLE_IF(is_integer<T>::value)>
+ auto operator()(T value) -> bool {
+ auto arg = make_write_int_arg(value, specs.sign);
+ write_int(out, static_cast<uint64_or_128_t<T>>(arg.abs_value), arg.prefix,
+ specs, digit_grouping<Char>(grouping, sep));
+ return true;
+ }
+
+ template <typename T, FMT_ENABLE_IF(!is_integer<T>::value)>
+ auto operator()(T) -> bool {
+ return false;
+ }
+};
+
+template <typename Char, typename OutputIt, typename T>
+FMT_CONSTEXPR FMT_INLINE auto write_int(OutputIt out, write_int_arg<T> arg,
+ const format_specs<Char>& specs,
+ locale_ref) -> OutputIt {
+ static_assert(std::is_same<T, uint32_or_64_or_128_t<T>>::value, "");
+ auto abs_value = arg.abs_value;
+ auto prefix = arg.prefix;
+ switch (specs.type) {
+ case presentation_type::none:
+ case presentation_type::dec: {
+ auto num_digits = count_digits(abs_value);
+ return write_int(
+ out, num_digits, prefix, specs, [=](reserve_iterator<OutputIt> it) {
+ return format_decimal<Char>(it, abs_value, num_digits).end;
+ });
+ }
+ case presentation_type::hex_lower:
+ case presentation_type::hex_upper: {
+ bool upper = specs.type == presentation_type::hex_upper;
+ if (specs.alt)
+ prefix_append(prefix, unsigned(upper ? 'X' : 'x') << 8 | '0');
+ int num_digits = count_digits<4>(abs_value);
+ return write_int(
+ out, num_digits, prefix, specs, [=](reserve_iterator<OutputIt> it) {
+ return format_uint<4, Char>(it, abs_value, num_digits, upper);
+ });
+ }
+ case presentation_type::bin_lower:
+ case presentation_type::bin_upper: {
+ bool upper = specs.type == presentation_type::bin_upper;
+ if (specs.alt)
+ prefix_append(prefix, unsigned(upper ? 'B' : 'b') << 8 | '0');
+ int num_digits = count_digits<1>(abs_value);
+ return write_int(out, num_digits, prefix, specs,
+ [=](reserve_iterator<OutputIt> it) {
+ return format_uint<1, Char>(it, abs_value, num_digits);
+ });
+ }
+ case presentation_type::oct: {
+ int num_digits = count_digits<3>(abs_value);
+ // Octal prefix '0' is counted as a digit, so only add it if precision
+ // is not greater than the number of digits.
+ if (specs.alt && specs.precision <= num_digits && abs_value != 0)
+ prefix_append(prefix, '0');
+ return write_int(out, num_digits, prefix, specs,
+ [=](reserve_iterator<OutputIt> it) {
+ return format_uint<3, Char>(it, abs_value, num_digits);
+ });
+ }
+ case presentation_type::chr:
+ return write_char(out, static_cast<Char>(abs_value), specs);
+ default:
+ throw_format_error("invalid format specifier");
+ }
+ return out;
+}
+template <typename Char, typename OutputIt, typename T>
+FMT_CONSTEXPR FMT_NOINLINE auto write_int_noinline(
+ OutputIt out, write_int_arg<T> arg, const format_specs<Char>& specs,
+ locale_ref loc) -> OutputIt {
+ return write_int(out, arg, specs, loc);
+}
+template <typename Char, typename OutputIt, typename T,
+ FMT_ENABLE_IF(is_integral<T>::value &&
+ !std::is_same<T, bool>::value &&
+ std::is_same<OutputIt, buffer_appender<Char>>::value)>
+FMT_CONSTEXPR FMT_INLINE auto write(OutputIt out, T value,
+ const format_specs<Char>& specs,
+ locale_ref loc) -> OutputIt {
+ if (specs.localized && write_loc(out, value, specs, loc)) return out;
+ return write_int_noinline(out, make_write_int_arg(value, specs.sign), specs,
+ loc);
+}
+// An inlined version of write used in format string compilation.
+template <typename Char, typename OutputIt, typename T,
+ FMT_ENABLE_IF(is_integral<T>::value &&
+ !std::is_same<T, bool>::value &&
+ !std::is_same<OutputIt, buffer_appender<Char>>::value)>
+FMT_CONSTEXPR FMT_INLINE auto write(OutputIt out, T value,
+ const format_specs<Char>& specs,
+ locale_ref loc) -> OutputIt {
+ if (specs.localized && write_loc(out, value, specs, loc)) return out;
+ return write_int(out, make_write_int_arg(value, specs.sign), specs, loc);
+}
+
+// An output iterator that counts the number of objects written to it and
+// discards them.
+class counting_iterator {
+ private:
+ size_t count_;
+
+ public:
+ using iterator_category = std::output_iterator_tag;
+ using difference_type = std::ptrdiff_t;
+ using pointer = void;
+ using reference = void;
+ FMT_UNCHECKED_ITERATOR(counting_iterator);
+
+ struct value_type {
+ template <typename T> FMT_CONSTEXPR void operator=(const T&) {}
+ };
+
+ FMT_CONSTEXPR counting_iterator() : count_(0) {}
+
+ FMT_CONSTEXPR size_t count() const { return count_; }
+
+ FMT_CONSTEXPR counting_iterator& operator++() {
+ ++count_;
+ return *this;
+ }
+ FMT_CONSTEXPR counting_iterator operator++(int) {
+ auto it = *this;
+ ++*this;
+ return it;
+ }
+
+ FMT_CONSTEXPR friend counting_iterator operator+(counting_iterator it,
+ difference_type n) {
+ it.count_ += static_cast<size_t>(n);
+ return it;
+ }
+
+ FMT_CONSTEXPR value_type operator*() const { return {}; }
+};
+
+template <typename Char, typename OutputIt>
+FMT_CONSTEXPR auto write(OutputIt out, basic_string_view<Char> s,
+ const format_specs<Char>& specs) -> OutputIt {
+ auto data = s.data();
+ auto size = s.size();
+ if (specs.precision >= 0 && to_unsigned(specs.precision) < size)
+ size = code_point_index(s, to_unsigned(specs.precision));
+ bool is_debug = specs.type == presentation_type::debug;
+ size_t width = 0;
+ if (specs.width != 0) {
+ if (is_debug)
+ width = write_escaped_string(counting_iterator{}, s).count();
+ else
+ width = compute_width(basic_string_view<Char>(data, size));
+ }
+ return write_padded(out, specs, size, width,
+ [=](reserve_iterator<OutputIt> it) {
+ if (is_debug) return write_escaped_string(it, s);
+ return copy_str<Char>(data, data + size, it);
+ });
+}
+template <typename Char, typename OutputIt>
+FMT_CONSTEXPR auto write(OutputIt out,
+ basic_string_view<type_identity_t<Char>> s,
+ const format_specs<Char>& specs, locale_ref)
+ -> OutputIt {
+ return write(out, s, specs);
+}
+template <typename Char, typename OutputIt>
+FMT_CONSTEXPR auto write(OutputIt out, const Char* s,
+ const format_specs<Char>& specs, locale_ref)
+ -> OutputIt {
+ return specs.type != presentation_type::pointer
+ ? write(out, basic_string_view<Char>(s), specs, {})
+ : write_ptr<Char>(out, bit_cast<uintptr_t>(s), &specs);
+}
+
+template <typename Char, typename OutputIt, typename T,
+ FMT_ENABLE_IF(is_integral<T>::value &&
+ !std::is_same<T, bool>::value &&
+ !std::is_same<T, Char>::value)>
+FMT_CONSTEXPR auto write(OutputIt out, T value) -> OutputIt {
+ auto abs_value = static_cast<uint32_or_64_or_128_t<T>>(value);
+ bool negative = is_negative(value);
+ // Don't do -abs_value since it trips unsigned-integer-overflow sanitizer.
+ if (negative) abs_value = ~abs_value + 1;
+ int num_digits = count_digits(abs_value);
+ auto size = (negative ? 1 : 0) + static_cast<size_t>(num_digits);
+ auto it = reserve(out, size);
+ if (auto ptr = to_pointer<Char>(it, size)) {
+ if (negative) *ptr++ = static_cast<Char>('-');
+ format_decimal<Char>(ptr, abs_value, num_digits);
+ return out;
+ }
+ if (negative) *it++ = static_cast<Char>('-');
+ it = format_decimal<Char>(it, abs_value, num_digits).end;
+ return base_iterator(out, it);
+}
+
+// A floating-point presentation format.
+enum class float_format : unsigned char {
+ general, // General: exponent notation or fixed point based on magnitude.
+ exp, // Exponent notation with the default precision of 6, e.g. 1.2e-3.
+ fixed, // Fixed point with the default precision of 6, e.g. 0.0012.
+ hex
+};
+
+struct float_specs {
+ int precision;
+ float_format format : 8;
+ sign_t sign : 8;
+ bool upper : 1;
+ bool locale : 1;
+ bool binary32 : 1;
+ bool showpoint : 1;
+};
+
+template <typename ErrorHandler = error_handler, typename Char>
+FMT_CONSTEXPR auto parse_float_type_spec(const format_specs<Char>& specs,
+ ErrorHandler&& eh = {})
+ -> float_specs {
+ auto result = float_specs();
+ result.showpoint = specs.alt;
+ result.locale = specs.localized;
+ switch (specs.type) {
+ case presentation_type::none:
+ result.format = float_format::general;
+ break;
+ case presentation_type::general_upper:
+ result.upper = true;
+ FMT_FALLTHROUGH;
+ case presentation_type::general_lower:
+ result.format = float_format::general;
+ break;
+ case presentation_type::exp_upper:
+ result.upper = true;
+ FMT_FALLTHROUGH;
+ case presentation_type::exp_lower:
+ result.format = float_format::exp;
+ result.showpoint |= specs.precision != 0;
+ break;
+ case presentation_type::fixed_upper:
+ result.upper = true;
+ FMT_FALLTHROUGH;
+ case presentation_type::fixed_lower:
+ result.format = float_format::fixed;
+ result.showpoint |= specs.precision != 0;
+ break;
+ case presentation_type::hexfloat_upper:
+ result.upper = true;
+ FMT_FALLTHROUGH;
+ case presentation_type::hexfloat_lower:
+ result.format = float_format::hex;
+ break;
+ default:
+ eh.on_error("invalid format specifier");
+ break;
+ }
+ return result;
+}
+
+template <typename Char, typename OutputIt>
+FMT_CONSTEXPR20 auto write_nonfinite(OutputIt out, bool isnan,
+ format_specs<Char> specs,
+ const float_specs& fspecs) -> OutputIt {
+ auto str =
+ isnan ? (fspecs.upper ? "NAN" : "nan") : (fspecs.upper ? "INF" : "inf");
+ constexpr size_t str_size = 3;
+ auto sign = fspecs.sign;
+ auto size = str_size + (sign ? 1 : 0);
+ // Replace '0'-padding with space for non-finite values.
+ const bool is_zero_fill =
+ specs.fill.size() == 1 && *specs.fill.data() == static_cast<Char>('0');
+ if (is_zero_fill) specs.fill[0] = static_cast<Char>(' ');
+ return write_padded(out, specs, size, [=](reserve_iterator<OutputIt> it) {
+ if (sign) *it++ = detail::sign<Char>(sign);
+ return copy_str<Char>(str, str + str_size, it);
+ });
+}
+
+// A decimal floating-point number significand * pow(10, exp).
+struct big_decimal_fp {
+ const char* significand;
+ int significand_size;
+ int exponent;
+};
+
+constexpr auto get_significand_size(const big_decimal_fp& f) -> int {
+ return f.significand_size;
+}
+template <typename T>
+inline auto get_significand_size(const dragonbox::decimal_fp<T>& f) -> int {
+ return count_digits(f.significand);
+}
+
+template <typename Char, typename OutputIt>
+constexpr auto write_significand(OutputIt out, const char* significand,
+ int significand_size) -> OutputIt {
+ return copy_str<Char>(significand, significand + significand_size, out);
+}
+template <typename Char, typename OutputIt, typename UInt>
+inline auto write_significand(OutputIt out, UInt significand,
+ int significand_size) -> OutputIt {
+ return format_decimal<Char>(out, significand, significand_size).end;
+}
+template <typename Char, typename OutputIt, typename T, typename Grouping>
+FMT_CONSTEXPR20 auto write_significand(OutputIt out, T significand,
+ int significand_size, int exponent,
+ const Grouping& grouping) -> OutputIt {
+ if (!grouping.has_separator()) {
+ out = write_significand<Char>(out, significand, significand_size);
+ return detail::fill_n(out, exponent, static_cast<Char>('0'));
+ }
+ auto buffer = memory_buffer();
+ write_significand<char>(appender(buffer), significand, significand_size);
+ detail::fill_n(appender(buffer), exponent, '0');
+ return grouping.apply(out, string_view(buffer.data(), buffer.size()));
+}
+
+template <typename Char, typename UInt,
+ FMT_ENABLE_IF(std::is_integral<UInt>::value)>
+inline auto write_significand(Char* out, UInt significand, int significand_size,
+ int integral_size, Char decimal_point) -> Char* {
+ if (!decimal_point)
+ return format_decimal(out, significand, significand_size).end;
+ out += significand_size + 1;
+ Char* end = out;
+ int floating_size = significand_size - integral_size;
+ for (int i = floating_size / 2; i > 0; --i) {
+ out -= 2;
+ copy2(out, digits2(static_cast<std::size_t>(significand % 100)));
+ significand /= 100;
+ }
+ if (floating_size % 2 != 0) {
+ *--out = static_cast<Char>('0' + significand % 10);
+ significand /= 10;
+ }
+ *--out = decimal_point;
+ format_decimal(out - integral_size, significand, integral_size);
+ return end;
+}
+
+template <typename OutputIt, typename UInt, typename Char,
+ FMT_ENABLE_IF(!std::is_pointer<remove_cvref_t<OutputIt>>::value)>
+inline auto write_significand(OutputIt out, UInt significand,
+ int significand_size, int integral_size,
+ Char decimal_point) -> OutputIt {
+ // Buffer is large enough to hold digits (digits10 + 1) and a decimal point.
+ Char buffer[digits10<UInt>() + 2];
+ auto end = write_significand(buffer, significand, significand_size,
+ integral_size, decimal_point);
+ return detail::copy_str_noinline<Char>(buffer, end, out);
+}
+
+template <typename OutputIt, typename Char>
+FMT_CONSTEXPR auto write_significand(OutputIt out, const char* significand,
+ int significand_size, int integral_size,
+ Char decimal_point) -> OutputIt {
+ out = detail::copy_str_noinline<Char>(significand,
+ significand + integral_size, out);
+ if (!decimal_point) return out;
+ *out++ = decimal_point;
+ return detail::copy_str_noinline<Char>(significand + integral_size,
+ significand + significand_size, out);
+}
+
+template <typename OutputIt, typename Char, typename T, typename Grouping>
+FMT_CONSTEXPR20 auto write_significand(OutputIt out, T significand,
+ int significand_size, int integral_size,
+ Char decimal_point,
+ const Grouping& grouping) -> OutputIt {
+ if (!grouping.has_separator()) {
+ return write_significand(out, significand, significand_size, integral_size,
+ decimal_point);
+ }
+ auto buffer = basic_memory_buffer<Char>();
+ write_significand(buffer_appender<Char>(buffer), significand,
+ significand_size, integral_size, decimal_point);
+ grouping.apply(
+ out, basic_string_view<Char>(buffer.data(), to_unsigned(integral_size)));
+ return detail::copy_str_noinline<Char>(buffer.data() + integral_size,
+ buffer.end(), out);
+}
+
+template <typename OutputIt, typename DecimalFP, typename Char,
+ typename Grouping = digit_grouping<Char>>
+FMT_CONSTEXPR20 auto do_write_float(OutputIt out, const DecimalFP& f,
+ const format_specs<Char>& specs,
+ float_specs fspecs, locale_ref loc)
+ -> OutputIt {
+ auto significand = f.significand;
+ int significand_size = get_significand_size(f);
+ const Char zero = static_cast<Char>('0');
+ auto sign = fspecs.sign;
+ size_t size = to_unsigned(significand_size) + (sign ? 1 : 0);
+ using iterator = reserve_iterator<OutputIt>;
+
+ Char decimal_point =
+ fspecs.locale ? detail::decimal_point<Char>(loc) : static_cast<Char>('.');
+
+ int output_exp = f.exponent + significand_size - 1;
+ auto use_exp_format = [=]() {
+ if (fspecs.format == float_format::exp) return true;
+ if (fspecs.format != float_format::general) return false;
+ // Use the fixed notation if the exponent is in [exp_lower, exp_upper),
+ // e.g. 0.0001 instead of 1e-04. Otherwise use the exponent notation.
+ const int exp_lower = -4, exp_upper = 16;
+ return output_exp < exp_lower ||
+ output_exp >= (fspecs.precision > 0 ? fspecs.precision : exp_upper);
+ };
+ if (use_exp_format()) {
+ int num_zeros = 0;
+ if (fspecs.showpoint) {
+ num_zeros = fspecs.precision - significand_size;
+ if (num_zeros < 0) num_zeros = 0;
+ size += to_unsigned(num_zeros);
+ } else if (significand_size == 1) {
+ decimal_point = Char();
+ }
+ auto abs_output_exp = output_exp >= 0 ? output_exp : -output_exp;
+ int exp_digits = 2;
+ if (abs_output_exp >= 100) exp_digits = abs_output_exp >= 1000 ? 4 : 3;
+
+ size += to_unsigned((decimal_point ? 1 : 0) + 2 + exp_digits);
+ char exp_char = fspecs.upper ? 'E' : 'e';
+ auto write = [=](iterator it) {
+ if (sign) *it++ = detail::sign<Char>(sign);
+ // Insert a decimal point after the first digit and add an exponent.
+ it = write_significand(it, significand, significand_size, 1,
+ decimal_point);
+ if (num_zeros > 0) it = detail::fill_n(it, num_zeros, zero);
+ *it++ = static_cast<Char>(exp_char);
+ return write_exponent<Char>(output_exp, it);
+ };
+ return specs.width > 0 ? write_padded<align::right>(out, specs, size, write)
+ : base_iterator(out, write(reserve(out, size)));
+ }
+
+ int exp = f.exponent + significand_size;
+ if (f.exponent >= 0) {
+ // 1234e5 -> 123400000[.0+]
+ size += to_unsigned(f.exponent);
+ int num_zeros = fspecs.precision - exp;
+ abort_fuzzing_if(num_zeros > 5000);
+ if (fspecs.showpoint) {
+ ++size;
+ if (num_zeros <= 0 && fspecs.format != float_format::fixed) num_zeros = 0;
+ if (num_zeros > 0) size += to_unsigned(num_zeros);
+ }
+ auto grouping = Grouping(loc, fspecs.locale);
+ size += to_unsigned(grouping.count_separators(exp));
+ return write_padded<align::right>(out, specs, size, [&](iterator it) {
+ if (sign) *it++ = detail::sign<Char>(sign);
+ it = write_significand<Char>(it, significand, significand_size,
+ f.exponent, grouping);
+ if (!fspecs.showpoint) return it;
+ *it++ = decimal_point;
+ return num_zeros > 0 ? detail::fill_n(it, num_zeros, zero) : it;
+ });
+ } else if (exp > 0) {
+ // 1234e-2 -> 12.34[0+]
+ int num_zeros = fspecs.showpoint ? fspecs.precision - significand_size : 0;
+ size += 1 + to_unsigned(num_zeros > 0 ? num_zeros : 0);
+ auto grouping = Grouping(loc, fspecs.locale);
+ size += to_unsigned(grouping.count_separators(exp));
+ return write_padded<align::right>(out, specs, size, [&](iterator it) {
+ if (sign) *it++ = detail::sign<Char>(sign);
+ it = write_significand(it, significand, significand_size, exp,
+ decimal_point, grouping);
+ return num_zeros > 0 ? detail::fill_n(it, num_zeros, zero) : it;
+ });
+ }
+ // 1234e-6 -> 0.001234
+ int num_zeros = -exp;
+ if (significand_size == 0 && fspecs.precision >= 0 &&
+ fspecs.precision < num_zeros) {
+ num_zeros = fspecs.precision;
+ }
+ bool pointy = num_zeros != 0 || significand_size != 0 || fspecs.showpoint;
+ size += 1 + (pointy ? 1 : 0) + to_unsigned(num_zeros);
+ return write_padded<align::right>(out, specs, size, [&](iterator it) {
+ if (sign) *it++ = detail::sign<Char>(sign);
+ *it++ = zero;
+ if (!pointy) return it;
+ *it++ = decimal_point;
+ it = detail::fill_n(it, num_zeros, zero);
+ return write_significand<Char>(it, significand, significand_size);
+ });
+}
+
+template <typename Char> class fallback_digit_grouping {
+ public:
+ constexpr fallback_digit_grouping(locale_ref, bool) {}
+
+ constexpr bool has_separator() const { return false; }
+
+ constexpr int count_separators(int) const { return 0; }
+
+ template <typename Out, typename C>
+ constexpr Out apply(Out out, basic_string_view<C>) const {
+ return out;
+ }
+};
+
+template <typename OutputIt, typename DecimalFP, typename Char>
+FMT_CONSTEXPR20 auto write_float(OutputIt out, const DecimalFP& f,
+ const format_specs<Char>& specs,
+ float_specs fspecs, locale_ref loc)
+ -> OutputIt {
+ if (is_constant_evaluated()) {
+ return do_write_float<OutputIt, DecimalFP, Char,
+ fallback_digit_grouping<Char>>(out, f, specs, fspecs,
+ loc);
+ } else {
+ return do_write_float(out, f, specs, fspecs, loc);
+ }
+}
+
+template <typename T> constexpr bool isnan(T value) {
+ return !(value >= value); // std::isnan doesn't support __float128.
+}
+
+template <typename T, typename Enable = void>
+struct has_isfinite : std::false_type {};
+
+template <typename T>
+struct has_isfinite<T, enable_if_t<sizeof(std::isfinite(T())) != 0>>
+ : std::true_type {};
+
+template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value&&
+ has_isfinite<T>::value)>
+FMT_CONSTEXPR20 bool isfinite(T value) {
+ constexpr T inf = T(std::numeric_limits<double>::infinity());
+ if (is_constant_evaluated())
+ return !detail::isnan(value) && value < inf && value > -inf;
+ return std::isfinite(value);
+}
+template <typename T, FMT_ENABLE_IF(!has_isfinite<T>::value)>
+FMT_CONSTEXPR bool isfinite(T value) {
+ T inf = T(std::numeric_limits<double>::infinity());
+ // std::isfinite doesn't support __float128.
+ return !detail::isnan(value) && value < inf && value > -inf;
+}
+
+template <typename T, FMT_ENABLE_IF(is_floating_point<T>::value)>
+FMT_INLINE FMT_CONSTEXPR bool signbit(T value) {
+ if (is_constant_evaluated()) {
+#ifdef __cpp_if_constexpr
+ if constexpr (std::numeric_limits<double>::is_iec559) {
+ auto bits = detail::bit_cast<uint64_t>(static_cast<double>(value));
+ return (bits >> (num_bits<uint64_t>() - 1)) != 0;
+ }
+#endif
+ }
+ return std::signbit(static_cast<double>(value));
+}
+
+enum class round_direction { unknown, up, down };
+
+// Given the divisor (normally a power of 10), the remainder = v % divisor for
+// some number v and the error, returns whether v should be rounded up, down, or
+// whether the rounding direction can't be determined due to error.
+// error should be less than divisor / 2.
+FMT_CONSTEXPR inline round_direction get_round_direction(uint64_t divisor,
+ uint64_t remainder,
+ uint64_t error) {
+ FMT_ASSERT(remainder < divisor, ""); // divisor - remainder won't overflow.
+ FMT_ASSERT(error < divisor, ""); // divisor - error won't overflow.
+ FMT_ASSERT(error < divisor - error, ""); // error * 2 won't overflow.
+ // Round down if (remainder + error) * 2 <= divisor.
+ if (remainder <= divisor - remainder && error * 2 <= divisor - remainder * 2)
+ return round_direction::down;
+ // Round up if (remainder - error) * 2 >= divisor.
+ if (remainder >= error &&
+ remainder - error >= divisor - (remainder - error)) {
+ return round_direction::up;
+ }
+ return round_direction::unknown;
+}
+
+namespace digits {
+enum result {
+ more, // Generate more digits.
+ done, // Done generating digits.
+ error // Digit generation cancelled due to an error.
+};
+}
+
+struct gen_digits_handler {
+ char* buf;
+ int size;
+ int precision;
+ int exp10;
+ bool fixed;
+
+ FMT_CONSTEXPR digits::result on_digit(char digit, uint64_t divisor,
+ uint64_t remainder, uint64_t error,
+ bool integral) {
+ FMT_ASSERT(remainder < divisor, "");
+ buf[size++] = digit;
+ if (!integral && error >= remainder) return digits::error;
+ if (size < precision) return digits::more;
+ if (!integral) {
+ // Check if error * 2 < divisor with overflow prevention.
+ // The check is not needed for the integral part because error = 1
+ // and divisor > (1 << 32) there.
+ if (error >= divisor || error >= divisor - error) return digits::error;
+ } else {
+ FMT_ASSERT(error == 1 && divisor > 2, "");
+ }
+ auto dir = get_round_direction(divisor, remainder, error);
+ if (dir != round_direction::up)
+ return dir == round_direction::down ? digits::done : digits::error;
+ ++buf[size - 1];
+ for (int i = size - 1; i > 0 && buf[i] > '9'; --i) {
+ buf[i] = '0';
+ ++buf[i - 1];
+ }
+ if (buf[0] > '9') {
+ buf[0] = '1';
+ if (fixed)
+ buf[size++] = '0';
+ else
+ ++exp10;
+ }
+ return digits::done;
+ }
+};
+
+inline FMT_CONSTEXPR20 void adjust_precision(int& precision, int exp10) {
+ // Adjust fixed precision by exponent because it is relative to decimal
+ // point.
+ if (exp10 > 0 && precision > max_value<int>() - exp10)
+ FMT_THROW(format_error("number is too big"));
+ precision += exp10;
+}
+
+// Generates output using the Grisu digit-gen algorithm.
+// error: the size of the region (lower, upper) outside of which numbers
+// definitely do not round to value (Delta in Grisu3).
+FMT_INLINE FMT_CONSTEXPR20 auto grisu_gen_digits(fp value, uint64_t error,
+ int& exp,
+ gen_digits_handler& handler)
+ -> digits::result {
+ const fp one(1ULL << -value.e, value.e);
+ // The integral part of scaled value (p1 in Grisu) = value / one. It cannot be
+ // zero because it contains a product of two 64-bit numbers with MSB set (due
+ // to normalization) - 1, shifted right by at most 60 bits.
+ auto integral = static_cast<uint32_t>(value.f >> -one.e);
+ FMT_ASSERT(integral != 0, "");
+ FMT_ASSERT(integral == value.f >> -one.e, "");
+ // The fractional part of scaled value (p2 in Grisu) c = value % one.
+ uint64_t fractional = value.f & (one.f - 1);
+ exp = count_digits(integral); // kappa in Grisu.
+ // Non-fixed formats require at least one digit and no precision adjustment.
+ if (handler.fixed) {
+ adjust_precision(handler.precision, exp + handler.exp10);
+ // Check if precision is satisfied just by leading zeros, e.g.
+ // format("{:.2f}", 0.001) gives "0.00" without generating any digits.
+ if (handler.precision <= 0) {
+ if (handler.precision < 0) return digits::done;
+ // Divide by 10 to prevent overflow.
+ uint64_t divisor = data::power_of_10_64[exp - 1] << -one.e;
+ auto dir = get_round_direction(divisor, value.f / 10, error * 10);
+ if (dir == round_direction::unknown) return digits::error;
+ handler.buf[handler.size++] = dir == round_direction::up ? '1' : '0';
+ return digits::done;
+ }
+ }
+ // Generate digits for the integral part. This can produce up to 10 digits.
+ do {
+ uint32_t digit = 0;
+ auto divmod_integral = [&](uint32_t divisor) {
+ digit = integral / divisor;
+ integral %= divisor;
+ };
+ // This optimization by Milo Yip reduces the number of integer divisions by
+ // one per iteration.
+ switch (exp) {
+ case 10:
+ divmod_integral(1000000000);
+ break;
+ case 9:
+ divmod_integral(100000000);
+ break;
+ case 8:
+ divmod_integral(10000000);
+ break;
+ case 7:
+ divmod_integral(1000000);
+ break;
+ case 6:
+ divmod_integral(100000);
+ break;
+ case 5:
+ divmod_integral(10000);
+ break;
+ case 4:
+ divmod_integral(1000);
+ break;
+ case 3:
+ divmod_integral(100);
+ break;
+ case 2:
+ divmod_integral(10);
+ break;
+ case 1:
+ digit = integral;
+ integral = 0;
+ break;
+ default:
+ FMT_ASSERT(false, "invalid number of digits");
+ }
+ --exp;
+ auto remainder = (static_cast<uint64_t>(integral) << -one.e) + fractional;
+ auto result = handler.on_digit(static_cast<char>('0' + digit),
+ data::power_of_10_64[exp] << -one.e,
+ remainder, error, true);
+ if (result != digits::more) return result;
+ } while (exp > 0);
+ // Generate digits for the fractional part.
+ for (;;) {
+ fractional *= 10;
+ error *= 10;
+ char digit = static_cast<char>('0' + (fractional >> -one.e));
+ fractional &= one.f - 1;
+ --exp;
+ auto result = handler.on_digit(digit, one.f, fractional, error, false);
+ if (result != digits::more) return result;
+ }
+}
+
+class bigint {
+ private:
+ // A bigint is stored as an array of bigits (big digits), with bigit at index
+ // 0 being the least significant one.
+ using bigit = uint32_t;
+ using double_bigit = uint64_t;
+ enum { bigits_capacity = 32 };
+ basic_memory_buffer<bigit, bigits_capacity> bigits_;
+ int exp_;
+
+ FMT_CONSTEXPR20 bigit operator[](int index) const {
+ return bigits_[to_unsigned(index)];
+ }
+ FMT_CONSTEXPR20 bigit& operator[](int index) {
+ return bigits_[to_unsigned(index)];
+ }
+
+ static constexpr const int bigit_bits = num_bits<bigit>();
+
+ friend struct formatter<bigint>;
+
+ FMT_CONSTEXPR20 void subtract_bigits(int index, bigit other, bigit& borrow) {
+ auto result = static_cast<double_bigit>((*this)[index]) - other - borrow;
+ (*this)[index] = static_cast<bigit>(result);
+ borrow = static_cast<bigit>(result >> (bigit_bits * 2 - 1));
+ }
+
+ FMT_CONSTEXPR20 void remove_leading_zeros() {
+ int num_bigits = static_cast<int>(bigits_.size()) - 1;
+ while (num_bigits > 0 && (*this)[num_bigits] == 0) --num_bigits;
+ bigits_.resize(to_unsigned(num_bigits + 1));
+ }
+
+ // Computes *this -= other assuming aligned bigints and *this >= other.
+ FMT_CONSTEXPR20 void subtract_aligned(const bigint& other) {
+ FMT_ASSERT(other.exp_ >= exp_, "unaligned bigints");
+ FMT_ASSERT(compare(*this, other) >= 0, "");
+ bigit borrow = 0;
+ int i = other.exp_ - exp_;
+ for (size_t j = 0, n = other.bigits_.size(); j != n; ++i, ++j)
+ subtract_bigits(i, other.bigits_[j], borrow);
+ while (borrow > 0) subtract_bigits(i, 0, borrow);
+ remove_leading_zeros();
+ }
+
+ FMT_CONSTEXPR20 void multiply(uint32_t value) {
+ const double_bigit wide_value = value;
+ bigit carry = 0;
+ for (size_t i = 0, n = bigits_.size(); i < n; ++i) {
+ double_bigit result = bigits_[i] * wide_value + carry;
+ bigits_[i] = static_cast<bigit>(result);
+ carry = static_cast<bigit>(result >> bigit_bits);
+ }
+ if (carry != 0) bigits_.push_back(carry);
+ }
+
+ template <typename UInt, FMT_ENABLE_IF(std::is_same<UInt, uint64_t>::value ||
+ std::is_same<UInt, uint128_t>::value)>
+ FMT_CONSTEXPR20 void multiply(UInt value) {
+ using half_uint =
+ conditional_t<std::is_same<UInt, uint128_t>::value, uint64_t, uint32_t>;
+ const int shift = num_bits<half_uint>() - bigit_bits;
+ const UInt lower = static_cast<half_uint>(value);
+ const UInt upper = value >> num_bits<half_uint>();
+ UInt carry = 0;
+ for (size_t i = 0, n = bigits_.size(); i < n; ++i) {
+ UInt result = lower * bigits_[i] + static_cast<bigit>(carry);
+ carry = (upper * bigits_[i] << shift) + (result >> bigit_bits) +
+ (carry >> bigit_bits);
+ bigits_[i] = static_cast<bigit>(result);
+ }
+ while (carry != 0) {
+ bigits_.push_back(static_cast<bigit>(carry));
+ carry >>= bigit_bits;
+ }
+ }
+
+ template <typename UInt, FMT_ENABLE_IF(std::is_same<UInt, uint64_t>::value ||
+ std::is_same<UInt, uint128_t>::value)>
+ FMT_CONSTEXPR20 void assign(UInt n) {
+ size_t num_bigits = 0;
+ do {
+ bigits_[num_bigits++] = static_cast<bigit>(n);
+ n >>= bigit_bits;
+ } while (n != 0);
+ bigits_.resize(num_bigits);
+ exp_ = 0;
+ }
+
+ public:
+ FMT_CONSTEXPR20 bigint() : exp_(0) {}
+ explicit bigint(uint64_t n) { assign(n); }
+
+ bigint(const bigint&) = delete;
+ void operator=(const bigint&) = delete;
+
+ FMT_CONSTEXPR20 void assign(const bigint& other) {
+ auto size = other.bigits_.size();
+ bigits_.resize(size);
+ auto data = other.bigits_.data();
+ std::copy(data, data + size, make_checked(bigits_.data(), size));
+ exp_ = other.exp_;
+ }
+
+ template <typename Int> FMT_CONSTEXPR20 void operator=(Int n) {
+ FMT_ASSERT(n > 0, "");
+ assign(uint64_or_128_t<Int>(n));
+ }
+
+ FMT_CONSTEXPR20 int num_bigits() const {
+ return static_cast<int>(bigits_.size()) + exp_;
+ }
+
+ FMT_NOINLINE FMT_CONSTEXPR20 bigint& operator<<=(int shift) {
+ FMT_ASSERT(shift >= 0, "");
+ exp_ += shift / bigit_bits;
+ shift %= bigit_bits;
+ if (shift == 0) return *this;
+ bigit carry = 0;
+ for (size_t i = 0, n = bigits_.size(); i < n; ++i) {
+ bigit c = bigits_[i] >> (bigit_bits - shift);
+ bigits_[i] = (bigits_[i] << shift) + carry;
+ carry = c;
+ }
+ if (carry != 0) bigits_.push_back(carry);
+ return *this;
+ }
+
+ template <typename Int> FMT_CONSTEXPR20 bigint& operator*=(Int value) {
+ FMT_ASSERT(value > 0, "");
+ multiply(uint32_or_64_or_128_t<Int>(value));
+ return *this;
+ }
+
+ friend FMT_CONSTEXPR20 int compare(const bigint& lhs, const bigint& rhs) {
+ int num_lhs_bigits = lhs.num_bigits(), num_rhs_bigits = rhs.num_bigits();
+ if (num_lhs_bigits != num_rhs_bigits)
+ return num_lhs_bigits > num_rhs_bigits ? 1 : -1;
+ int i = static_cast<int>(lhs.bigits_.size()) - 1;
+ int j = static_cast<int>(rhs.bigits_.size()) - 1;
+ int end = i - j;
+ if (end < 0) end = 0;
+ for (; i >= end; --i, --j) {
+ bigit lhs_bigit = lhs[i], rhs_bigit = rhs[j];
+ if (lhs_bigit != rhs_bigit) return lhs_bigit > rhs_bigit ? 1 : -1;
+ }
+ if (i != j) return i > j ? 1 : -1;
+ return 0;
+ }
+
+ // Returns compare(lhs1 + lhs2, rhs).
+ friend FMT_CONSTEXPR20 int add_compare(const bigint& lhs1, const bigint& lhs2,
+ const bigint& rhs) {
+ auto minimum = [](int a, int b) { return a < b ? a : b; };
+ auto maximum = [](int a, int b) { return a > b ? a : b; };
+ int max_lhs_bigits = maximum(lhs1.num_bigits(), lhs2.num_bigits());
+ int num_rhs_bigits = rhs.num_bigits();
+ if (max_lhs_bigits + 1 < num_rhs_bigits) return -1;
+ if (max_lhs_bigits > num_rhs_bigits) return 1;
+ auto get_bigit = [](const bigint& n, int i) -> bigit {
+ return i >= n.exp_ && i < n.num_bigits() ? n[i - n.exp_] : 0;
+ };
+ double_bigit borrow = 0;
+ int min_exp = minimum(minimum(lhs1.exp_, lhs2.exp_), rhs.exp_);
+ for (int i = num_rhs_bigits - 1; i >= min_exp; --i) {
+ double_bigit sum =
+ static_cast<double_bigit>(get_bigit(lhs1, i)) + get_bigit(lhs2, i);
+ bigit rhs_bigit = get_bigit(rhs, i);
+ if (sum > rhs_bigit + borrow) return 1;
+ borrow = rhs_bigit + borrow - sum;
+ if (borrow > 1) return -1;
+ borrow <<= bigit_bits;
+ }
+ return borrow != 0 ? -1 : 0;
+ }
+
+ // Assigns pow(10, exp) to this bigint.
+ FMT_CONSTEXPR20 void assign_pow10(int exp) {
+ FMT_ASSERT(exp >= 0, "");
+ if (exp == 0) return *this = 1;
+ // Find the top bit.
+ int bitmask = 1;
+ while (exp >= bitmask) bitmask <<= 1;
+ bitmask >>= 1;
+ // pow(10, exp) = pow(5, exp) * pow(2, exp). First compute pow(5, exp) by
+ // repeated squaring and multiplication.
+ *this = 5;
+ bitmask >>= 1;
+ while (bitmask != 0) {
+ square();
+ if ((exp & bitmask) != 0) *this *= 5;
+ bitmask >>= 1;
+ }
+ *this <<= exp; // Multiply by pow(2, exp) by shifting.
+ }
+
+ FMT_CONSTEXPR20 void square() {
+ int num_bigits = static_cast<int>(bigits_.size());
+ int num_result_bigits = 2 * num_bigits;
+ basic_memory_buffer<bigit, bigits_capacity> n(std::move(bigits_));
+ bigits_.resize(to_unsigned(num_result_bigits));
+ auto sum = uint128_t();
+ for (int bigit_index = 0; bigit_index < num_bigits; ++bigit_index) {
+ // Compute bigit at position bigit_index of the result by adding
+ // cross-product terms n[i] * n[j] such that i + j == bigit_index.
+ for (int i = 0, j = bigit_index; j >= 0; ++i, --j) {
+ // Most terms are multiplied twice which can be optimized in the future.
+ sum += static_cast<double_bigit>(n[i]) * n[j];
+ }
+ (*this)[bigit_index] = static_cast<bigit>(sum);
+ sum >>= num_bits<bigit>(); // Compute the carry.
+ }
+ // Do the same for the top half.
+ for (int bigit_index = num_bigits; bigit_index < num_result_bigits;
+ ++bigit_index) {
+ for (int j = num_bigits - 1, i = bigit_index - j; i < num_bigits;)
+ sum += static_cast<double_bigit>(n[i++]) * n[j--];
+ (*this)[bigit_index] = static_cast<bigit>(sum);
+ sum >>= num_bits<bigit>();
+ }
+ remove_leading_zeros();
+ exp_ *= 2;
+ }
+
+ // If this bigint has a bigger exponent than other, adds trailing zero to make
+ // exponents equal. This simplifies some operations such as subtraction.
+ FMT_CONSTEXPR20 void align(const bigint& other) {
+ int exp_difference = exp_ - other.exp_;
+ if (exp_difference <= 0) return;
+ int num_bigits = static_cast<int>(bigits_.size());
+ bigits_.resize(to_unsigned(num_bigits + exp_difference));
+ for (int i = num_bigits - 1, j = i + exp_difference; i >= 0; --i, --j)
+ bigits_[j] = bigits_[i];
+ std::uninitialized_fill_n(bigits_.data(), exp_difference, 0);
+ exp_ -= exp_difference;
+ }
+
+ // Divides this bignum by divisor, assigning the remainder to this and
+ // returning the quotient.
+ FMT_CONSTEXPR20 int divmod_assign(const bigint& divisor) {
+ FMT_ASSERT(this != &divisor, "");
+ if (compare(*this, divisor) < 0) return 0;
+ FMT_ASSERT(divisor.bigits_[divisor.bigits_.size() - 1u] != 0, "");
+ align(divisor);
+ int quotient = 0;
+ do {
+ subtract_aligned(divisor);
+ ++quotient;
+ } while (compare(*this, divisor) >= 0);
+ return quotient;
+ }
+};
+
+// format_dragon flags.
+enum dragon {
+ predecessor_closer = 1,
+ fixup = 2, // Run fixup to correct exp10 which can be off by one.
+ fixed = 4,
+};
+
+// Formats a floating-point number using a variation of the Fixed-Precision
+// Positive Floating-Point Printout ((FPP)^2) algorithm by Steele & White:
+// https://fmt.dev/papers/p372-steele.pdf.
+FMT_CONSTEXPR20 inline void format_dragon(basic_fp<uint128_t> value,
+ unsigned flags, int num_digits,
+ buffer<char>& buf, int& exp10) {
+ bigint numerator; // 2 * R in (FPP)^2.
+ bigint denominator; // 2 * S in (FPP)^2.
+ // lower and upper are differences between value and corresponding boundaries.
+ bigint lower; // (M^- in (FPP)^2).
+ bigint upper_store; // upper's value if different from lower.
+ bigint* upper = nullptr; // (M^+ in (FPP)^2).
+ // Shift numerator and denominator by an extra bit or two (if lower boundary
+ // is closer) to make lower and upper integers. This eliminates multiplication
+ // by 2 during later computations.
+ bool is_predecessor_closer = (flags & dragon::predecessor_closer) != 0;
+ int shift = is_predecessor_closer ? 2 : 1;
+ if (value.e >= 0) {
+ numerator = value.f;
+ numerator <<= value.e + shift;
+ lower = 1;
+ lower <<= value.e;
+ if (is_predecessor_closer) {
+ upper_store = 1;
+ upper_store <<= value.e + 1;
+ upper = &upper_store;
+ }
+ denominator.assign_pow10(exp10);
+ denominator <<= shift;
+ } else if (exp10 < 0) {
+ numerator.assign_pow10(-exp10);
+ lower.assign(numerator);
+ if (is_predecessor_closer) {
+ upper_store.assign(numerator);
+ upper_store <<= 1;
+ upper = &upper_store;
+ }
+ numerator *= value.f;
+ numerator <<= shift;
+ denominator = 1;
+ denominator <<= shift - value.e;
+ } else {
+ numerator = value.f;
+ numerator <<= shift;
+ denominator.assign_pow10(exp10);
+ denominator <<= shift - value.e;
+ lower = 1;
+ if (is_predecessor_closer) {
+ upper_store = 1ULL << 1;
+ upper = &upper_store;
+ }
+ }
+ int even = static_cast<int>((value.f & 1) == 0);
+ if (!upper) upper = &lower;
+ if ((flags & dragon::fixup) != 0) {
+ if (add_compare(numerator, *upper, denominator) + even <= 0) {
+ --exp10;
+ numerator *= 10;
+ if (num_digits < 0) {
+ lower *= 10;
+ if (upper != &lower) *upper *= 10;
+ }
+ }
+ if ((flags & dragon::fixed) != 0) adjust_precision(num_digits, exp10 + 1);
+ }
+ // Invariant: value == (numerator / denominator) * pow(10, exp10).
+ if (num_digits < 0) {
+ // Generate the shortest representation.
+ num_digits = 0;
+ char* data = buf.data();
+ for (;;) {
+ int digit = numerator.divmod_assign(denominator);
+ bool low = compare(numerator, lower) - even < 0; // numerator <[=] lower.
+ // numerator + upper >[=] pow10:
+ bool high = add_compare(numerator, *upper, denominator) + even > 0;
+ data[num_digits++] = static_cast<char>('0' + digit);
+ if (low || high) {
+ if (!low) {
+ ++data[num_digits - 1];
+ } else if (high) {
+ int result = add_compare(numerator, numerator, denominator);
+ // Round half to even.
+ if (result > 0 || (result == 0 && (digit % 2) != 0))
+ ++data[num_digits - 1];
+ }
+ buf.try_resize(to_unsigned(num_digits));
+ exp10 -= num_digits - 1;
+ return;
+ }
+ numerator *= 10;
+ lower *= 10;
+ if (upper != &lower) *upper *= 10;
+ }
+ }
+ // Generate the given number of digits.
+ exp10 -= num_digits - 1;
+ if (num_digits == 0) {
+ denominator *= 10;
+ auto digit = add_compare(numerator, numerator, denominator) > 0 ? '1' : '0';
+ buf.push_back(digit);
+ return;
+ }
+ buf.try_resize(to_unsigned(num_digits));
+ for (int i = 0; i < num_digits - 1; ++i) {
+ int digit = numerator.divmod_assign(denominator);
+ buf[i] = static_cast<char>('0' + digit);
+ numerator *= 10;
+ }
+ int digit = numerator.divmod_assign(denominator);
+ auto result = add_compare(numerator, numerator, denominator);
+ if (result > 0 || (result == 0 && (digit % 2) != 0)) {
+ if (digit == 9) {
+ const auto overflow = '0' + 10;
+ buf[num_digits - 1] = overflow;
+ // Propagate the carry.
+ for (int i = num_digits - 1; i > 0 && buf[i] == overflow; --i) {
+ buf[i] = '0';
+ ++buf[i - 1];
+ }
+ if (buf[0] == overflow) {
+ buf[0] = '1';
+ ++exp10;
+ }
+ return;
+ }
+ ++digit;
+ }
+ buf[num_digits - 1] = static_cast<char>('0' + digit);
+}
+
+// Formats a floating-point number using the hexfloat format.
+template <typename Float, FMT_ENABLE_IF(!is_double_double<Float>::value)>
+FMT_CONSTEXPR20 void format_hexfloat(Float value, int precision,
+ float_specs specs, buffer<char>& buf) {
+ // float is passed as double to reduce the number of instantiations and to
+ // simplify implementation.
+ static_assert(!std::is_same<Float, float>::value, "");
+
+ using info = dragonbox::float_info<Float>;
+
+ // Assume Float is in the format [sign][exponent][significand].
+ using carrier_uint = typename info::carrier_uint;
+
+ constexpr auto num_float_significand_bits =
+ detail::num_significand_bits<Float>();
+
+ basic_fp<carrier_uint> f(value);
+ f.e += num_float_significand_bits;
+ if (!has_implicit_bit<Float>()) --f.e;
+
+ constexpr auto num_fraction_bits =
+ num_float_significand_bits + (has_implicit_bit<Float>() ? 1 : 0);
+ constexpr auto num_xdigits = (num_fraction_bits + 3) / 4;
+
+ constexpr auto leading_shift = ((num_xdigits - 1) * 4);
+ const auto leading_mask = carrier_uint(0xF) << leading_shift;
+ const auto leading_xdigit =
+ static_cast<uint32_t>((f.f & leading_mask) >> leading_shift);
+ if (leading_xdigit > 1) f.e -= (32 - countl_zero(leading_xdigit) - 1);
+
+ int print_xdigits = num_xdigits - 1;
+ if (precision >= 0 && print_xdigits > precision) {
+ const int shift = ((print_xdigits - precision - 1) * 4);
+ const auto mask = carrier_uint(0xF) << shift;
+ const auto v = static_cast<uint32_t>((f.f & mask) >> shift);
+
+ if (v >= 8) {
+ const auto inc = carrier_uint(1) << (shift + 4);
+ f.f += inc;
+ f.f &= ~(inc - 1);
+ }
+
+ // Check long double overflow
+ if (!has_implicit_bit<Float>()) {
+ const auto implicit_bit = carrier_uint(1) << num_float_significand_bits;
+ if ((f.f & implicit_bit) == implicit_bit) {
+ f.f >>= 4;
+ f.e += 4;
+ }
+ }
+
+ print_xdigits = precision;
+ }
+
+ char xdigits[num_bits<carrier_uint>() / 4];
+ detail::fill_n(xdigits, sizeof(xdigits), '0');
+ format_uint<4>(xdigits, f.f, num_xdigits, specs.upper);
+
+ // Remove zero tail
+ while (print_xdigits > 0 && xdigits[print_xdigits] == '0') --print_xdigits;
+
+ buf.push_back('0');
+ buf.push_back(specs.upper ? 'X' : 'x');
+ buf.push_back(xdigits[0]);
+ if (specs.showpoint || print_xdigits > 0 || print_xdigits < precision)
+ buf.push_back('.');
+ buf.append(xdigits + 1, xdigits + 1 + print_xdigits);
+ for (; print_xdigits < precision; ++print_xdigits) buf.push_back('0');
+
+ buf.push_back(specs.upper ? 'P' : 'p');
+
+ uint32_t abs_e;
+ if (f.e < 0) {
+ buf.push_back('-');
+ abs_e = static_cast<uint32_t>(-f.e);
+ } else {
+ buf.push_back('+');
+ abs_e = static_cast<uint32_t>(f.e);
+ }
+ format_decimal<char>(appender(buf), abs_e, detail::count_digits(abs_e));
+}
+
+template <typename Float, FMT_ENABLE_IF(is_double_double<Float>::value)>
+FMT_CONSTEXPR20 void format_hexfloat(Float value, int precision,
+ float_specs specs, buffer<char>& buf) {
+ format_hexfloat(static_cast<double>(value), precision, specs, buf);
+}
+
+template <typename Float>
+FMT_CONSTEXPR20 auto format_float(Float value, int precision, float_specs specs,
+ buffer<char>& buf) -> int {
+ // float is passed as double to reduce the number of instantiations.
+ static_assert(!std::is_same<Float, float>::value, "");
+ FMT_ASSERT(value >= 0, "value is negative");
+ auto converted_value = convert_float(value);
+
+ const bool fixed = specs.format == float_format::fixed;
+ if (value <= 0) { // <= instead of == to silence a warning.
+ if (precision <= 0 || !fixed) {
+ buf.push_back('0');
+ return 0;
+ }
+ buf.try_resize(to_unsigned(precision));
+ fill_n(buf.data(), precision, '0');
+ return -precision;
+ }
+
+ int exp = 0;
+ bool use_dragon = true;
+ unsigned dragon_flags = 0;
+ if (!is_fast_float<Float>()) {
+ const auto inv_log2_10 = 0.3010299956639812; // 1 / log2(10)
+ using info = dragonbox::float_info<decltype(converted_value)>;
+ const auto f = basic_fp<typename info::carrier_uint>(converted_value);
+ // Compute exp, an approximate power of 10, such that
+ // 10^(exp - 1) <= value < 10^exp or 10^exp <= value < 10^(exp + 1).
+ // This is based on log10(value) == log2(value) / log2(10) and approximation
+ // of log2(value) by e + num_fraction_bits idea from double-conversion.
+ exp = static_cast<int>(
+ std::ceil((f.e + count_digits<1>(f.f) - 1) * inv_log2_10 - 1e-10));
+ dragon_flags = dragon::fixup;
+ } else if (!is_constant_evaluated() && precision < 0) {
+ // Use Dragonbox for the shortest format.
+ if (specs.binary32) {
+ auto dec = dragonbox::to_decimal(static_cast<float>(value));
+ write<char>(buffer_appender<char>(buf), dec.significand);
+ return dec.exponent;
+ }
+ auto dec = dragonbox::to_decimal(static_cast<double>(value));
+ write<char>(buffer_appender<char>(buf), dec.significand);
+ return dec.exponent;
+ } else if (is_constant_evaluated()) {
+ // Use Grisu + Dragon4 for the given precision:
+ // https://www.cs.tufts.edu/~nr/cs257/archive/florian-loitsch/printf.pdf.
+ const int min_exp = -60; // alpha in Grisu.
+ int cached_exp10 = 0; // K in Grisu.
+ fp normalized = normalize(fp(converted_value));
+ const auto cached_pow = get_cached_power(
+ min_exp - (normalized.e + fp::num_significand_bits), cached_exp10);
+ normalized = normalized * cached_pow;
+ gen_digits_handler handler{buf.data(), 0, precision, -cached_exp10, fixed};
+ if (grisu_gen_digits(normalized, 1, exp, handler) != digits::error &&
+ !is_constant_evaluated()) {
+ exp += handler.exp10;
+ buf.try_resize(to_unsigned(handler.size));
+ use_dragon = false;
+ } else {
+ exp += handler.size - cached_exp10 - 1;
+ precision = handler.precision;
+ }
+ } else {
+ // Extract significand bits and exponent bits.
+ using info = dragonbox::float_info<double>;
+ auto br = bit_cast<uint64_t>(static_cast<double>(value));
+
+ const uint64_t significand_mask =
+ (static_cast<uint64_t>(1) << num_significand_bits<double>()) - 1;
+ uint64_t significand = (br & significand_mask);
+ int exponent = static_cast<int>((br & exponent_mask<double>()) >>
+ num_significand_bits<double>());
+
+ if (exponent != 0) { // Check if normal.
+ exponent -= exponent_bias<double>() + num_significand_bits<double>();
+ significand |=
+ (static_cast<uint64_t>(1) << num_significand_bits<double>());
+ significand <<= 1;
+ } else {
+ // Normalize subnormal inputs.
+ FMT_ASSERT(significand != 0, "zeros should not appear hear");
+ int shift = countl_zero(significand);
+ FMT_ASSERT(shift >= num_bits<uint64_t>() - num_significand_bits<double>(),
+ "");
+ shift -= (num_bits<uint64_t>() - num_significand_bits<double>() - 2);
+ exponent = (std::numeric_limits<double>::min_exponent -
+ num_significand_bits<double>()) -
+ shift;
+ significand <<= shift;
+ }
+
+ // Compute the first several nonzero decimal significand digits.
+ // We call the number we get the first segment.
+ const int k = info::kappa - dragonbox::floor_log10_pow2(exponent);
+ exp = -k;
+ const int beta = exponent + dragonbox::floor_log2_pow10(k);
+ uint64_t first_segment;
+ bool has_more_segments;
+ int digits_in_the_first_segment;
+ {
+ const auto r = dragonbox::umul192_upper128(
+ significand << beta, dragonbox::get_cached_power(k));
+ first_segment = r.high();
+ has_more_segments = r.low() != 0;
+
+ // The first segment can have 18 ~ 19 digits.
+ if (first_segment >= 1000000000000000000ULL) {
+ digits_in_the_first_segment = 19;
+ } else {
+ // When it is of 18-digits, we align it to 19-digits by adding a bogus
+ // zero at the end.
+ digits_in_the_first_segment = 18;
+ first_segment *= 10;
+ }
+ }
+
+ // Compute the actual number of decimal digits to print.
+ if (fixed) {
+ adjust_precision(precision, exp + digits_in_the_first_segment);
+ }
+
+ // Use Dragon4 only when there might be not enough digits in the first
+ // segment.
+ if (digits_in_the_first_segment > precision) {
+ use_dragon = false;
+
+ if (precision <= 0) {
+ exp += digits_in_the_first_segment;
+
+ if (precision < 0) {
+ // Nothing to do, since all we have are just leading zeros.
+ buf.try_resize(0);
+ } else {
+ // We may need to round-up.
+ buf.try_resize(1);
+ if ((first_segment | static_cast<uint64_t>(has_more_segments)) >
+ 5000000000000000000ULL) {
+ buf[0] = '1';
+ } else {
+ buf[0] = '0';
+ }
+ }
+ } // precision <= 0
+ else {
+ exp += digits_in_the_first_segment - precision;
+
+ // When precision > 0, we divide the first segment into three
+ // subsegments, each with 9, 9, and 0 ~ 1 digits so that each fits
+ // in 32-bits which usually allows faster calculation than in
+ // 64-bits. Since some compiler (e.g. MSVC) doesn't know how to optimize
+ // division-by-constant for large 64-bit divisors, we do it here
+ // manually. The magic number 7922816251426433760 below is equal to
+ // ceil(2^(64+32) / 10^10).
+ const uint32_t first_subsegment = static_cast<uint32_t>(
+ dragonbox::umul128_upper64(first_segment, 7922816251426433760ULL) >>
+ 32);
+ const uint64_t second_third_subsegments =
+ first_segment - first_subsegment * 10000000000ULL;
+
+ uint64_t prod;
+ uint32_t digits;
+ bool should_round_up;
+ int number_of_digits_to_print = precision > 9 ? 9 : precision;
+
+ // Print a 9-digits subsegment, either the first or the second.
+ auto print_subsegment = [&](uint32_t subsegment, char* buffer) {
+ int number_of_digits_printed = 0;
+
+ // If we want to print an odd number of digits from the subsegment,
+ if ((number_of_digits_to_print & 1) != 0) {
+ // Convert to 64-bit fixed-point fractional form with 1-digit
+ // integer part. The magic number 720575941 is a good enough
+ // approximation of 2^(32 + 24) / 10^8; see
+ // https://jk-jeon.github.io/posts/2022/12/fixed-precision-formatting/#fixed-length-case
+ // for details.
+ prod = ((subsegment * static_cast<uint64_t>(720575941)) >> 24) + 1;
+ digits = static_cast<uint32_t>(prod >> 32);
+ *buffer = static_cast<char>('0' + digits);
+ number_of_digits_printed++;
+ }
+ // If we want to print an even number of digits from the
+ // first_subsegment,
+ else {
+ // Convert to 64-bit fixed-point fractional form with 2-digits
+ // integer part. The magic number 450359963 is a good enough
+ // approximation of 2^(32 + 20) / 10^7; see
+ // https://jk-jeon.github.io/posts/2022/12/fixed-precision-formatting/#fixed-length-case
+ // for details.
+ prod = ((subsegment * static_cast<uint64_t>(450359963)) >> 20) + 1;
+ digits = static_cast<uint32_t>(prod >> 32);
+ copy2(buffer, digits2(digits));
+ number_of_digits_printed += 2;
+ }
+
+ // Print all digit pairs.
+ while (number_of_digits_printed < number_of_digits_to_print) {
+ prod = static_cast<uint32_t>(prod) * static_cast<uint64_t>(100);
+ digits = static_cast<uint32_t>(prod >> 32);
+ copy2(buffer + number_of_digits_printed, digits2(digits));
+ number_of_digits_printed += 2;
+ }
+ };
+
+ // Print first subsegment.
+ print_subsegment(first_subsegment, buf.data());
+
+ // Perform rounding if the first subsegment is the last subsegment to
+ // print.
+ if (precision <= 9) {
+ // Rounding inside the subsegment.
+ // We round-up if:
+ // - either the fractional part is strictly larger than 1/2, or
+ // - the fractional part is exactly 1/2 and the last digit is odd.
+ // We rely on the following observations:
+ // - If fractional_part >= threshold, then the fractional part is
+ // strictly larger than 1/2.
+ // - If the MSB of fractional_part is set, then the fractional part
+ // must be at least 1/2.
+ // - When the MSB of fractional_part is set, either
+ // second_third_subsegments being nonzero or has_more_segments
+ // being true means there are further digits not printed, so the
+ // fractional part is strictly larger than 1/2.
+ if (precision < 9) {
+ uint32_t fractional_part = static_cast<uint32_t>(prod);
+ should_round_up = fractional_part >=
+ data::fractional_part_rounding_thresholds
+ [8 - number_of_digits_to_print] ||
+ ((fractional_part >> 31) &
+ ((digits & 1) | (second_third_subsegments != 0) |
+ has_more_segments)) != 0;
+ }
+ // Rounding at the subsegment boundary.
+ // In this case, the fractional part is at least 1/2 if and only if
+ // second_third_subsegments >= 5000000000ULL, and is strictly larger
+ // than 1/2 if we further have either second_third_subsegments >
+ // 5000000000ULL or has_more_segments == true.
+ else {
+ should_round_up = second_third_subsegments > 5000000000ULL ||
+ (second_third_subsegments == 5000000000ULL &&
+ ((digits & 1) != 0 || has_more_segments));
+ }
+ }
+ // Otherwise, print the second subsegment.
+ else {
+ // Compilers are not aware of how to leverage the maximum value of
+ // second_third_subsegments to find out a better magic number which
+ // allows us to eliminate an additional shift. 1844674407370955162 =
+ // ceil(2^64/10) < ceil(2^64*(10^9/(10^10 - 1))).
+ const uint32_t second_subsegment =
+ static_cast<uint32_t>(dragonbox::umul128_upper64(
+ second_third_subsegments, 1844674407370955162ULL));
+ const uint32_t third_subsegment =
+ static_cast<uint32_t>(second_third_subsegments) -
+ second_subsegment * 10;
+
+ number_of_digits_to_print = precision - 9;
+ print_subsegment(second_subsegment, buf.data() + 9);
+
+ // Rounding inside the subsegment.
+ if (precision < 18) {
+ // The condition third_subsegment != 0 implies that the segment was
+ // of 19 digits, so in this case the third segment should be
+ // consisting of a genuine digit from the input.
+ uint32_t fractional_part = static_cast<uint32_t>(prod);
+ should_round_up = fractional_part >=
+ data::fractional_part_rounding_thresholds
+ [8 - number_of_digits_to_print] ||
+ ((fractional_part >> 31) &
+ ((digits & 1) | (third_subsegment != 0) |
+ has_more_segments)) != 0;
+ }
+ // Rounding at the subsegment boundary.
+ else {
+ // In this case, the segment must be of 19 digits, thus
+ // the third subsegment should be consisting of a genuine digit from
+ // the input.
+ should_round_up = third_subsegment > 5 ||
+ (third_subsegment == 5 &&
+ ((digits & 1) != 0 || has_more_segments));
+ }
+ }
+
+ // Round-up if necessary.
+ if (should_round_up) {
+ ++buf[precision - 1];
+ for (int i = precision - 1; i > 0 && buf[i] > '9'; --i) {
+ buf[i] = '0';
+ ++buf[i - 1];
+ }
+ if (buf[0] > '9') {
+ buf[0] = '1';
+ if (fixed)
+ buf[precision++] = '0';
+ else
+ ++exp;
+ }
+ }
+ buf.try_resize(to_unsigned(precision));
+ }
+ } // if (digits_in_the_first_segment > precision)
+ else {
+ // Adjust the exponent for its use in Dragon4.
+ exp += digits_in_the_first_segment - 1;
+ }
+ }
+ if (use_dragon) {
+ auto f = basic_fp<uint128_t>();
+ bool is_predecessor_closer = specs.binary32
+ ? f.assign(static_cast<float>(value))
+ : f.assign(converted_value);
+ if (is_predecessor_closer) dragon_flags |= dragon::predecessor_closer;
+ if (fixed) dragon_flags |= dragon::fixed;
+ // Limit precision to the maximum possible number of significant digits in
+ // an IEEE754 double because we don't need to generate zeros.
+ const int max_double_digits = 767;
+ if (precision > max_double_digits) precision = max_double_digits;
+ format_dragon(f, dragon_flags, precision, buf, exp);
+ }
+ if (!fixed && !specs.showpoint) {
+ // Remove trailing zeros.
+ auto num_digits = buf.size();
+ while (num_digits > 0 && buf[num_digits - 1] == '0') {
+ --num_digits;
+ ++exp;
+ }
+ buf.try_resize(num_digits);
+ }
+ return exp;
+}
+template <typename Char, typename OutputIt, typename T>
+FMT_CONSTEXPR20 auto write_float(OutputIt out, T value,
+ format_specs<Char> specs, locale_ref loc)
+ -> OutputIt {
+ float_specs fspecs = parse_float_type_spec(specs);
+ fspecs.sign = specs.sign;
+ if (detail::signbit(value)) { // value < 0 is false for NaN so use signbit.
+ fspecs.sign = sign::minus;
+ value = -value;
+ } else if (fspecs.sign == sign::minus) {
+ fspecs.sign = sign::none;
+ }
+
+ if (!detail::isfinite(value))
+ return write_nonfinite(out, detail::isnan(value), specs, fspecs);
+
+ if (specs.align == align::numeric && fspecs.sign) {
+ auto it = reserve(out, 1);
+ *it++ = detail::sign<Char>(fspecs.sign);
+ out = base_iterator(out, it);
+ fspecs.sign = sign::none;
+ if (specs.width != 0) --specs.width;
+ }
+
+ memory_buffer buffer;
+ if (fspecs.format == float_format::hex) {
+ if (fspecs.sign) buffer.push_back(detail::sign<char>(fspecs.sign));
+ format_hexfloat(convert_float(value), specs.precision, fspecs, buffer);
+ return write_bytes<align::right>(out, {buffer.data(), buffer.size()},
+ specs);
+ }
+ int precision = specs.precision >= 0 || specs.type == presentation_type::none
+ ? specs.precision
+ : 6;
+ if (fspecs.format == float_format::exp) {
+ if (precision == max_value<int>())
+ throw_format_error("number is too big");
+ else
+ ++precision;
+ } else if (fspecs.format != float_format::fixed && precision == 0) {
+ precision = 1;
+ }
+ if (const_check(std::is_same<T, float>())) fspecs.binary32 = true;
+ int exp = format_float(convert_float(value), precision, fspecs, buffer);
+ fspecs.precision = precision;
+ auto f = big_decimal_fp{buffer.data(), static_cast<int>(buffer.size()), exp};
+ return write_float(out, f, specs, fspecs, loc);
+}
+
+template <typename Char, typename OutputIt, typename T,
+ FMT_ENABLE_IF(is_floating_point<T>::value)>
+FMT_CONSTEXPR20 auto write(OutputIt out, T value, format_specs<Char> specs,
+ locale_ref loc = {}) -> OutputIt {
+ if (const_check(!is_supported_floating_point(value))) return out;
+ return specs.localized && write_loc(out, value, specs, loc)
+ ? out
+ : write_float(out, value, specs, loc);
+}
+
+template <typename Char, typename OutputIt, typename T,
+ FMT_ENABLE_IF(is_fast_float<T>::value)>
+FMT_CONSTEXPR20 auto write(OutputIt out, T value) -> OutputIt {
+ if (is_constant_evaluated()) return write(out, value, format_specs<Char>());
+ if (const_check(!is_supported_floating_point(value))) return out;
+
+ auto fspecs = float_specs();
+ if (detail::signbit(value)) {
+ fspecs.sign = sign::minus;
+ value = -value;
+ }
+
+ constexpr auto specs = format_specs<Char>();
+ using floaty = conditional_t<std::is_same<T, long double>::value, double, T>;
+ using floaty_uint = typename dragonbox::float_info<floaty>::carrier_uint;
+ floaty_uint mask = exponent_mask<floaty>();
+ if ((bit_cast<floaty_uint>(value) & mask) == mask)
+ return write_nonfinite(out, std::isnan(value), specs, fspecs);
+
+ auto dec = dragonbox::to_decimal(static_cast<floaty>(value));
+ return write_float(out, dec, specs, fspecs, {});
+}
+
+template <typename Char, typename OutputIt, typename T,
+ FMT_ENABLE_IF(is_floating_point<T>::value &&
+ !is_fast_float<T>::value)>
+inline auto write(OutputIt out, T value) -> OutputIt {
+ return write(out, value, format_specs<Char>());
+}
+
+template <typename Char, typename OutputIt>
+auto write(OutputIt out, monostate, format_specs<Char> = {}, locale_ref = {})
+ -> OutputIt {
+ FMT_ASSERT(false, "");
+ return out;
+}
+
+template <typename Char, typename OutputIt>
+FMT_CONSTEXPR auto write(OutputIt out, basic_string_view<Char> value)
+ -> OutputIt {
+ auto it = reserve(out, value.size());
+ it = copy_str_noinline<Char>(value.begin(), value.end(), it);
+ return base_iterator(out, it);
+}
+
+template <typename Char, typename OutputIt, typename T,
+ FMT_ENABLE_IF(is_string<T>::value)>
+constexpr auto write(OutputIt out, const T& value) -> OutputIt {
+ return write<Char>(out, to_string_view(value));
+}
+
+// FMT_ENABLE_IF() condition separated to workaround an MSVC bug.
+template <
+ typename Char, typename OutputIt, typename T,
+ bool check =
+ std::is_enum<T>::value && !std::is_same<T, Char>::value &&
+ mapped_type_constant<T, basic_format_context<OutputIt, Char>>::value !=
+ type::custom_type,
+ FMT_ENABLE_IF(check)>
+FMT_CONSTEXPR auto write(OutputIt out, T value) -> OutputIt {
+ return write<Char>(out, static_cast<underlying_t<T>>(value));
+}
+
+template <typename Char, typename OutputIt, typename T,
+ FMT_ENABLE_IF(std::is_same<T, bool>::value)>
+FMT_CONSTEXPR auto write(OutputIt out, T value,
+ const format_specs<Char>& specs = {}, locale_ref = {})
+ -> OutputIt {
+ return specs.type != presentation_type::none &&
+ specs.type != presentation_type::string
+ ? write(out, value ? 1 : 0, specs, {})
+ : write_bytes(out, value ? "true" : "false", specs);
+}
+
+template <typename Char, typename OutputIt>
+FMT_CONSTEXPR auto write(OutputIt out, Char value) -> OutputIt {
+ auto it = reserve(out, 1);
+ *it++ = value;
+ return base_iterator(out, it);
+}
+
+template <typename Char, typename OutputIt>
+FMT_CONSTEXPR_CHAR_TRAITS auto write(OutputIt out, const Char* value)
+ -> OutputIt {
+ if (value) return write(out, basic_string_view<Char>(value));
+ throw_format_error("string pointer is null");
+ return out;
+}
+
+template <typename Char, typename OutputIt, typename T,
+ FMT_ENABLE_IF(std::is_same<T, void>::value)>
+auto write(OutputIt out, const T* value, const format_specs<Char>& specs = {},
+ locale_ref = {}) -> OutputIt {
+ return write_ptr<Char>(out, bit_cast<uintptr_t>(value), &specs);
+}
+
+// A write overload that handles implicit conversions.
+template <typename Char, typename OutputIt, typename T,
+ typename Context = basic_format_context<OutputIt, Char>>
+FMT_CONSTEXPR auto write(OutputIt out, const T& value) -> enable_if_t<
+ std::is_class<T>::value && !is_string<T>::value &&
+ !is_floating_point<T>::value && !std::is_same<T, Char>::value &&
+ !std::is_same<T, remove_cvref_t<decltype(arg_mapper<Context>().map(
+ value))>>::value,
+ OutputIt> {
+ return write<Char>(out, arg_mapper<Context>().map(value));
+}
+
+template <typename Char, typename OutputIt, typename T,
+ typename Context = basic_format_context<OutputIt, Char>>
+FMT_CONSTEXPR auto write(OutputIt out, const T& value)
+ -> enable_if_t<mapped_type_constant<T, Context>::value == type::custom_type,
+ OutputIt> {
+ auto ctx = Context(out, {}, {});
+ return typename Context::template formatter_type<T>().format(value, ctx);
+}
+
+// An argument visitor that formats the argument and writes it via the output
+// iterator. It's a class and not a generic lambda for compatibility with C++11.
+template <typename Char> struct default_arg_formatter {
+ using iterator = buffer_appender<Char>;
+ using context = buffer_context<Char>;
+
+ iterator out;
+ basic_format_args<context> args;
+ locale_ref loc;
+
+ template <typename T> auto operator()(T value) -> iterator {
+ return write<Char>(out, value);
+ }
+ auto operator()(typename basic_format_arg<context>::handle h) -> iterator {
+ basic_format_parse_context<Char> parse_ctx({});
+ context format_ctx(out, args, loc);
+ h.format(parse_ctx, format_ctx);
+ return format_ctx.out();
+ }
+};
+
+template <typename Char> struct arg_formatter {
+ using iterator = buffer_appender<Char>;
+ using context = buffer_context<Char>;
+
+ iterator out;
+ const format_specs<Char>& specs;
+ locale_ref locale;
+
+ template <typename T>
+ FMT_CONSTEXPR FMT_INLINE auto operator()(T value) -> iterator {
+ return detail::write(out, value, specs, locale);
+ }
+ auto operator()(typename basic_format_arg<context>::handle) -> iterator {
+ // User-defined types are handled separately because they require access
+ // to the parse context.
+ return out;
+ }
+};
+
+template <typename Char> struct custom_formatter {
+ basic_format_parse_context<Char>& parse_ctx;
+ buffer_context<Char>& ctx;
+
+ void operator()(
+ typename basic_format_arg<buffer_context<Char>>::handle h) const {
+ h.format(parse_ctx, ctx);
+ }
+ template <typename T> void operator()(T) const {}
+};
+
+template <typename ErrorHandler> class width_checker {
+ public:
+ explicit FMT_CONSTEXPR width_checker(ErrorHandler& eh) : handler_(eh) {}
+
+ template <typename T, FMT_ENABLE_IF(is_integer<T>::value)>
+ FMT_CONSTEXPR auto operator()(T value) -> unsigned long long {
+ if (is_negative(value)) handler_.on_error("negative width");
+ return static_cast<unsigned long long>(value);
+ }
+
+ template <typename T, FMT_ENABLE_IF(!is_integer<T>::value)>
+ FMT_CONSTEXPR auto operator()(T) -> unsigned long long {
+ handler_.on_error("width is not integer");
+ return 0;
+ }
+
+ private:
+ ErrorHandler& handler_;
+};
+
+template <typename ErrorHandler> class precision_checker {
+ public:
+ explicit FMT_CONSTEXPR precision_checker(ErrorHandler& eh) : handler_(eh) {}
+
+ template <typename T, FMT_ENABLE_IF(is_integer<T>::value)>
+ FMT_CONSTEXPR auto operator()(T value) -> unsigned long long {
+ if (is_negative(value)) handler_.on_error("negative precision");
+ return static_cast<unsigned long long>(value);
+ }
+
+ template <typename T, FMT_ENABLE_IF(!is_integer<T>::value)>
+ FMT_CONSTEXPR auto operator()(T) -> unsigned long long {
+ handler_.on_error("precision is not integer");
+ return 0;
+ }
+
+ private:
+ ErrorHandler& handler_;
+};
+
+template <template <typename> class Handler, typename FormatArg,
+ typename ErrorHandler>
+FMT_CONSTEXPR auto get_dynamic_spec(FormatArg arg, ErrorHandler eh) -> int {
+ unsigned long long value = visit_format_arg(Handler<ErrorHandler>(eh), arg);
+ if (value > to_unsigned(max_value<int>())) eh.on_error("number is too big");
+ return static_cast<int>(value);
+}
+
+template <typename Context, typename ID>
+FMT_CONSTEXPR auto get_arg(Context& ctx, ID id) ->
+ typename Context::format_arg {
+ auto arg = ctx.arg(id);
+ if (!arg) ctx.on_error("argument not found");
+ return arg;
+}
+
+template <template <typename> class Handler, typename Context>
+FMT_CONSTEXPR void handle_dynamic_spec(int& value,
+ arg_ref<typename Context::char_type> ref,
+ Context& ctx) {
+ switch (ref.kind) {
+ case arg_id_kind::none:
+ break;
+ case arg_id_kind::index:
+ value = detail::get_dynamic_spec<Handler>(get_arg(ctx, ref.val.index),
+ ctx.error_handler());
+ break;
+ case arg_id_kind::name:
+ value = detail::get_dynamic_spec<Handler>(get_arg(ctx, ref.val.name),
+ ctx.error_handler());
+ break;
+ }
+}
+
+#if FMT_USE_USER_DEFINED_LITERALS
+template <typename Char> struct udl_formatter {
+ basic_string_view<Char> str;
+
+ template <typename... T>
+ auto operator()(T&&... args) const -> std::basic_string<Char> {
+ return vformat(str, fmt::make_format_args<buffer_context<Char>>(args...));
+ }
+};
+
+# if FMT_USE_NONTYPE_TEMPLATE_ARGS
+template <typename T, typename Char, size_t N,
+ fmt::detail_exported::fixed_string<Char, N> Str>
+struct statically_named_arg : view {
+ static constexpr auto name = Str.data;
+
+ const T& value;
+ statically_named_arg(const T& v) : value(v) {}
+};
+
+template <typename T, typename Char, size_t N,
+ fmt::detail_exported::fixed_string<Char, N> Str>
+struct is_named_arg<statically_named_arg<T, Char, N, Str>> : std::true_type {};
+
+template <typename T, typename Char, size_t N,
+ fmt::detail_exported::fixed_string<Char, N> Str>
+struct is_statically_named_arg<statically_named_arg<T, Char, N, Str>>
+ : std::true_type {};
+
+template <typename Char, size_t N,
+ fmt::detail_exported::fixed_string<Char, N> Str>
+struct udl_arg {
+ template <typename T> auto operator=(T&& value) const {
+ return statically_named_arg<T, Char, N, Str>(std::forward<T>(value));
+ }
+};
+# else
+template <typename Char> struct udl_arg {
+ const Char* str;
+
+ template <typename T> auto operator=(T&& value) const -> named_arg<Char, T> {
+ return {str, std::forward<T>(value)};
+ }
+};
+# endif
+#endif // FMT_USE_USER_DEFINED_LITERALS
+
+template <typename Locale, typename Char>
+auto vformat(const Locale& loc, basic_string_view<Char> fmt,
+ basic_format_args<buffer_context<type_identity_t<Char>>> args)
+ -> std::basic_string<Char> {
+ auto buf = basic_memory_buffer<Char>();
+ detail::vformat_to(buf, fmt, args, detail::locale_ref(loc));
+ return {buf.data(), buf.size()};
+}
+
+using format_func = void (*)(detail::buffer<char>&, int, const char*);
+
+FMT_API void format_error_code(buffer<char>& out, int error_code,
+ string_view message) noexcept;
+
+FMT_API void report_error(format_func func, int error_code,
+ const char* message) noexcept;
+FMT_END_DETAIL_NAMESPACE
+
+FMT_API auto vsystem_error(int error_code, string_view format_str,
+ format_args args) -> std::system_error;
+
+/**
+ \rst
+ Constructs :class:`std::system_error` with a message formatted with
+ ``fmt::format(fmt, args...)``.
+ *error_code* is a system error code as given by ``errno``.
+
+ **Example**::
+
+ // This throws std::system_error with the description
+ // cannot open file 'madeup': No such file or directory
+ // or similar (system message may vary).
+ const char* filename = "madeup";
+ std::FILE* file = std::fopen(filename, "r");
+ if (!file)
+ throw fmt::system_error(errno, "cannot open file '{}'", filename);
+ \endrst
+*/
+template <typename... T>
+auto system_error(int error_code, format_string<T...> fmt, T&&... args)
+ -> std::system_error {
+ return vsystem_error(error_code, fmt, fmt::make_format_args(args...));
+}
+
+/**
+ \rst
+ Formats an error message for an error returned by an operating system or a
+ language runtime, for example a file opening error, and writes it to *out*.
+ The format is the same as the one used by ``std::system_error(ec, message)``
+ where ``ec`` is ``std::error_code(error_code, std::generic_category()})``.
+ It is implementation-defined but normally looks like:
+
+ .. parsed-literal::
+ *<message>*: *<system-message>*
+
+ where *<message>* is the passed message and *<system-message>* is the system
+ message corresponding to the error code.
+ *error_code* is a system error code as given by ``errno``.
+ \endrst
+ */
+FMT_API void format_system_error(detail::buffer<char>& out, int error_code,
+ const char* message) noexcept;
+
+// Reports a system error without throwing an exception.
+// Can be used to report errors from destructors.
+FMT_API void report_system_error(int error_code, const char* message) noexcept;
+
+/** Fast integer formatter. */
+class format_int {
+ private:
+ // Buffer should be large enough to hold all digits (digits10 + 1),
+ // a sign and a null character.
+ enum { buffer_size = std::numeric_limits<unsigned long long>::digits10 + 3 };
+ mutable char buffer_[buffer_size];
+ char* str_;
+
+ template <typename UInt> auto format_unsigned(UInt value) -> char* {
+ auto n = static_cast<detail::uint32_or_64_or_128_t<UInt>>(value);
+ return detail::format_decimal(buffer_, n, buffer_size - 1).begin;
+ }
+
+ template <typename Int> auto format_signed(Int value) -> char* {
+ auto abs_value = static_cast<detail::uint32_or_64_or_128_t<Int>>(value);
+ bool negative = value < 0;
+ if (negative) abs_value = 0 - abs_value;
+ auto begin = format_unsigned(abs_value);
+ if (negative) *--begin = '-';
+ return begin;
+ }
+
+ public:
+ explicit format_int(int value) : str_(format_signed(value)) {}
+ explicit format_int(long value) : str_(format_signed(value)) {}
+ explicit format_int(long long value) : str_(format_signed(value)) {}
+ explicit format_int(unsigned value) : str_(format_unsigned(value)) {}
+ explicit format_int(unsigned long value) : str_(format_unsigned(value)) {}
+ explicit format_int(unsigned long long value)
+ : str_(format_unsigned(value)) {}
+
+ /** Returns the number of characters written to the output buffer. */
+ auto size() const -> size_t {
+ return detail::to_unsigned(buffer_ - str_ + buffer_size - 1);
+ }
+
+ /**
+ Returns a pointer to the output buffer content. No terminating null
+ character is appended.
+ */
+ auto data() const -> const char* { return str_; }
+
+ /**
+ Returns a pointer to the output buffer content with terminating null
+ character appended.
+ */
+ auto c_str() const -> const char* {
+ buffer_[buffer_size - 1] = '\0';
+ return str_;
+ }
+
+ /**
+ \rst
+ Returns the content of the output buffer as an ``std::string``.
+ \endrst
+ */
+ auto str() const -> std::string { return std::string(str_, size()); }
+};
+
+template <typename T, typename Char>
+struct formatter<T, Char, enable_if_t<detail::has_format_as<T>::value>>
+ : private formatter<detail::format_as_t<T>> {
+ using base = formatter<detail::format_as_t<T>>;
+ using base::parse;
+
+ template <typename FormatContext>
+ auto format(const T& value, FormatContext& ctx) const -> decltype(ctx.out()) {
+ return base::format(format_as(value), ctx);
+ }
+};
+
+template <typename Char>
+struct formatter<void*, Char> : formatter<const void*, Char> {
+ template <typename FormatContext>
+ auto format(void* val, FormatContext& ctx) const -> decltype(ctx.out()) {
+ return formatter<const void*, Char>::format(val, ctx);
+ }
+};
+
+template <typename Char, size_t N>
+struct formatter<Char[N], Char> : formatter<basic_string_view<Char>, Char> {
+ template <typename FormatContext>
+ FMT_CONSTEXPR auto format(const Char* val, FormatContext& ctx) const
+ -> decltype(ctx.out()) {
+ return formatter<basic_string_view<Char>, Char>::format(val, ctx);
+ }
+};
+
+/**
+ \rst
+ Converts ``p`` to ``const void*`` for pointer formatting.
+
+ **Example**::
+
+ auto s = fmt::format("{}", fmt::ptr(p));
+ \endrst
+ */
+template <typename T> auto ptr(T p) -> const void* {
+ static_assert(std::is_pointer<T>::value, "");
+ return detail::bit_cast<const void*>(p);
+}
+template <typename T, typename Deleter>
+auto ptr(const std::unique_ptr<T, Deleter>& p) -> const void* {
+ return p.get();
+}
+template <typename T> auto ptr(const std::shared_ptr<T>& p) -> const void* {
+ return p.get();
+}
+
+/**
+ \rst
+ Converts ``e`` to the underlying type.
+
+ **Example**::
+
+ enum class color { red, green, blue };
+ auto s = fmt::format("{}", fmt::underlying(color::red));
+ \endrst
+ */
+template <typename Enum>
+constexpr auto underlying(Enum e) noexcept -> underlying_t<Enum> {
+ return static_cast<underlying_t<Enum>>(e);
+}
+
+namespace enums {
+template <typename Enum, FMT_ENABLE_IF(std::is_enum<Enum>::value)>
+constexpr auto format_as(Enum e) noexcept -> underlying_t<Enum> {
+ return static_cast<underlying_t<Enum>>(e);
+}
+} // namespace enums
+
+class bytes {
+ private:
+ string_view data_;
+ friend struct formatter<bytes>;
+
+ public:
+ explicit bytes(string_view data) : data_(data) {}
+};
+
+template <> struct formatter<bytes> {
+ private:
+ detail::dynamic_format_specs<> specs_;
+
+ public:
+ template <typename ParseContext>
+ FMT_CONSTEXPR auto parse(ParseContext& ctx) -> const char* {
+ return parse_format_specs(ctx.begin(), ctx.end(), specs_, ctx,
+ detail::type::string_type);
+ }
+
+ template <typename FormatContext>
+ auto format(bytes b, FormatContext& ctx) -> decltype(ctx.out()) {
+ detail::handle_dynamic_spec<detail::width_checker>(specs_.width,
+ specs_.width_ref, ctx);
+ detail::handle_dynamic_spec<detail::precision_checker>(
+ specs_.precision, specs_.precision_ref, ctx);
+ return detail::write_bytes(ctx.out(), b.data_, specs_);
+ }
+};
+
+// group_digits_view is not derived from view because it copies the argument.
+template <typename T> struct group_digits_view { T value; };
+
+/**
+ \rst
+ Returns a view that formats an integer value using ',' as a locale-independent
+ thousands separator.
+
+ **Example**::
+
+ fmt::print("{}", fmt::group_digits(12345));
+ // Output: "12,345"
+ \endrst
+ */
+template <typename T> auto group_digits(T value) -> group_digits_view<T> {
+ return {value};
+}
+
+template <typename T> struct formatter<group_digits_view<T>> : formatter<T> {
+ private:
+ detail::dynamic_format_specs<> specs_;
+
+ public:
+ template <typename ParseContext>
+ FMT_CONSTEXPR auto parse(ParseContext& ctx) -> const char* {
+ return parse_format_specs(ctx.begin(), ctx.end(), specs_, ctx,
+ detail::type::int_type);
+ }
+
+ template <typename FormatContext>
+ auto format(group_digits_view<T> t, FormatContext& ctx)
+ -> decltype(ctx.out()) {
+ detail::handle_dynamic_spec<detail::width_checker>(specs_.width,
+ specs_.width_ref, ctx);
+ detail::handle_dynamic_spec<detail::precision_checker>(
+ specs_.precision, specs_.precision_ref, ctx);
+ return detail::write_int(
+ ctx.out(), static_cast<detail::uint64_or_128_t<T>>(t.value), 0, specs_,
+ detail::digit_grouping<char>("\3", ","));
+ }
+};
+
+// DEPRECATED! join_view will be moved to ranges.h.
+template <typename It, typename Sentinel, typename Char = char>
+struct join_view : detail::view {
+ It begin;
+ Sentinel end;
+ basic_string_view<Char> sep;
+
+ join_view(It b, Sentinel e, basic_string_view<Char> s)
+ : begin(b), end(e), sep(s) {}
+};
+
+template <typename It, typename Sentinel, typename Char>
+struct formatter<join_view<It, Sentinel, Char>, Char> {
+ private:
+ using value_type =
+#ifdef __cpp_lib_ranges
+ std::iter_value_t<It>;
+#else
+ typename std::iterator_traits<It>::value_type;
+#endif
+ formatter<remove_cvref_t<value_type>, Char> value_formatter_;
+
+ public:
+ template <typename ParseContext>
+ FMT_CONSTEXPR auto parse(ParseContext& ctx) -> const Char* {
+ return value_formatter_.parse(ctx);
+ }
+
+ template <typename FormatContext>
+ auto format(const join_view<It, Sentinel, Char>& value,
+ FormatContext& ctx) const -> decltype(ctx.out()) {
+ auto it = value.begin;
+ auto out = ctx.out();
+ if (it != value.end) {
+ out = value_formatter_.format(*it, ctx);
+ ++it;
+ while (it != value.end) {
+ out = detail::copy_str<Char>(value.sep.begin(), value.sep.end(), out);
+ ctx.advance_to(out);
+ out = value_formatter_.format(*it, ctx);
+ ++it;
+ }
+ }
+ return out;
+ }
+};
+
+/**
+ Returns a view that formats the iterator range `[begin, end)` with elements
+ separated by `sep`.
+ */
+template <typename It, typename Sentinel>
+auto join(It begin, Sentinel end, string_view sep) -> join_view<It, Sentinel> {
+ return {begin, end, sep};
+}
+
+/**
+ \rst
+ Returns a view that formats `range` with elements separated by `sep`.
+
+ **Example**::
+
+ std::vector<int> v = {1, 2, 3};
+ fmt::print("{}", fmt::join(v, ", "));
+ // Output: "1, 2, 3"
+
+ ``fmt::join`` applies passed format specifiers to the range elements::
+
+ fmt::print("{:02}", fmt::join(v, ", "));
+ // Output: "01, 02, 03"
+ \endrst
+ */
+template <typename Range>
+auto join(Range&& range, string_view sep)
+ -> join_view<detail::iterator_t<Range>, detail::sentinel_t<Range>> {
+ return join(std::begin(range), std::end(range), sep);
+}
+
+/**
+ \rst
+ Converts *value* to ``std::string`` using the default format for type *T*.
+
+ **Example**::
+
+ #include <fmt/format.h>
+
+ std::string answer = fmt::to_string(42);
+ \endrst
+ */
+template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
+inline auto to_string(const T& value) -> std::string {
+ auto buffer = memory_buffer();
+ detail::write<char>(appender(buffer), value);
+ return {buffer.data(), buffer.size()};
+}
+
+template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+FMT_NODISCARD inline auto to_string(T value) -> std::string {
+ // The buffer should be large enough to store the number including the sign
+ // or "false" for bool.
+ constexpr int max_size = detail::digits10<T>() + 2;
+ char buffer[max_size > 5 ? static_cast<unsigned>(max_size) : 5];
+ char* begin = buffer;
+ return std::string(begin, detail::write<char>(begin, value));
+}
+
+template <typename Char, size_t SIZE>
+FMT_NODISCARD auto to_string(const basic_memory_buffer<Char, SIZE>& buf)
+ -> std::basic_string<Char> {
+ auto size = buf.size();
+ detail::assume(size < std::basic_string<Char>().max_size());
+ return std::basic_string<Char>(buf.data(), size);
+}
+
+FMT_BEGIN_DETAIL_NAMESPACE
+
+template <typename Char>
+void vformat_to(buffer<Char>& buf, basic_string_view<Char> fmt,
+ typename vformat_args<Char>::type args, locale_ref loc) {
+ auto out = buffer_appender<Char>(buf);
+ if (fmt.size() == 2 && equal2(fmt.data(), "{}")) {
+ auto arg = args.get(0);
+ if (!arg) error_handler().on_error("argument not found");
+ visit_format_arg(default_arg_formatter<Char>{out, args, loc}, arg);
+ return;
+ }
+
+ struct format_handler : error_handler {
+ basic_format_parse_context<Char> parse_context;
+ buffer_context<Char> context;
+
+ format_handler(buffer_appender<Char> p_out, basic_string_view<Char> str,
+ basic_format_args<buffer_context<Char>> p_args,
+ locale_ref p_loc)
+ : parse_context(str), context(p_out, p_args, p_loc) {}
+
+ void on_text(const Char* begin, const Char* end) {
+ auto text = basic_string_view<Char>(begin, to_unsigned(end - begin));
+ context.advance_to(write<Char>(context.out(), text));
+ }
+
+ FMT_CONSTEXPR auto on_arg_id() -> int {
+ return parse_context.next_arg_id();
+ }
+ FMT_CONSTEXPR auto on_arg_id(int id) -> int {
+ return parse_context.check_arg_id(id), id;
+ }
+ FMT_CONSTEXPR auto on_arg_id(basic_string_view<Char> id) -> int {
+ int arg_id = context.arg_id(id);
+ if (arg_id < 0) on_error("argument not found");
+ return arg_id;
+ }
+
+ FMT_INLINE void on_replacement_field(int id, const Char*) {
+ auto arg = get_arg(context, id);
+ context.advance_to(visit_format_arg(
+ default_arg_formatter<Char>{context.out(), context.args(),
+ context.locale()},
+ arg));
+ }
+
+ auto on_format_specs(int id, const Char* begin, const Char* end)
+ -> const Char* {
+ auto arg = get_arg(context, id);
+ if (arg.type() == type::custom_type) {
+ parse_context.advance_to(begin);
+ visit_format_arg(custom_formatter<Char>{parse_context, context}, arg);
+ return parse_context.begin();
+ }
+ auto specs = detail::dynamic_format_specs<Char>();
+ begin = parse_format_specs(begin, end, specs, parse_context, arg.type());
+ detail::handle_dynamic_spec<detail::width_checker>(
+ specs.width, specs.width_ref, context);
+ detail::handle_dynamic_spec<detail::precision_checker>(
+ specs.precision, specs.precision_ref, context);
+ if (begin == end || *begin != '}')
+ on_error("missing '}' in format string");
+ auto f = arg_formatter<Char>{context.out(), specs, context.locale()};
+ context.advance_to(visit_format_arg(f, arg));
+ return begin;
+ }
+ };
+ detail::parse_format_string<false>(fmt, format_handler(out, fmt, args, loc));
+}
+
+#ifndef FMT_HEADER_ONLY
+extern template FMT_API void vformat_to(buffer<char>&, string_view,
+ typename vformat_args<>::type,
+ locale_ref);
+extern template FMT_API auto thousands_sep_impl<char>(locale_ref)
+ -> thousands_sep_result<char>;
+extern template FMT_API auto thousands_sep_impl<wchar_t>(locale_ref)
+ -> thousands_sep_result<wchar_t>;
+extern template FMT_API auto decimal_point_impl(locale_ref) -> char;
+extern template FMT_API auto decimal_point_impl(locale_ref) -> wchar_t;
+#endif // FMT_HEADER_ONLY
+
+FMT_END_DETAIL_NAMESPACE
+
+#if FMT_USE_USER_DEFINED_LITERALS
+inline namespace literals {
+/**
+ \rst
+ User-defined literal equivalent of :func:`fmt::arg`.
+
+ **Example**::
+
+ using namespace fmt::literals;
+ fmt::print("Elapsed time: {s:.2f} seconds", "s"_a=1.23);
+ \endrst
+ */
+# if FMT_USE_NONTYPE_TEMPLATE_ARGS
+template <detail_exported::fixed_string Str> constexpr auto operator""_a() {
+ using char_t = remove_cvref_t<decltype(Str.data[0])>;
+ return detail::udl_arg<char_t, sizeof(Str.data) / sizeof(char_t), Str>();
+}
+# else
+constexpr auto operator"" _a(const char* s, size_t) -> detail::udl_arg<char> {
+ return {s};
+}
+# endif
+} // namespace literals
+#endif // FMT_USE_USER_DEFINED_LITERALS
+
+template <typename Locale, FMT_ENABLE_IF(detail::is_locale<Locale>::value)>
+inline auto vformat(const Locale& loc, string_view fmt, format_args args)
+ -> std::string {
+ return detail::vformat(loc, fmt, args);
+}
+
+template <typename Locale, typename... T,
+ FMT_ENABLE_IF(detail::is_locale<Locale>::value)>
+inline auto format(const Locale& loc, format_string<T...> fmt, T&&... args)
+ -> std::string {
+ return fmt::vformat(loc, string_view(fmt), fmt::make_format_args(args...));
+}
+
+template <typename OutputIt, typename Locale,
+ FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value&&
+ detail::is_locale<Locale>::value)>
+auto vformat_to(OutputIt out, const Locale& loc, string_view fmt,
+ format_args args) -> OutputIt {
+ using detail::get_buffer;
+ auto&& buf = get_buffer<char>(out);
+ detail::vformat_to(buf, fmt, args, detail::locale_ref(loc));
+ return detail::get_iterator(buf, out);
+}
+
+template <typename OutputIt, typename Locale, typename... T,
+ FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value&&
+ detail::is_locale<Locale>::value)>
+FMT_INLINE auto format_to(OutputIt out, const Locale& loc,
+ format_string<T...> fmt, T&&... args) -> OutputIt {
+ return vformat_to(out, loc, fmt, fmt::make_format_args(args...));
+}
+
+template <typename Locale, typename... T,
+ FMT_ENABLE_IF(detail::is_locale<Locale>::value)>
+FMT_NODISCARD FMT_INLINE auto formatted_size(const Locale& loc,
+ format_string<T...> fmt,
+ T&&... args) -> size_t {
+ auto buf = detail::counting_buffer<>();
+ detail::vformat_to<char>(buf, fmt, fmt::make_format_args(args...),
+ detail::locale_ref(loc));
+ return buf.count();
+}
+
+FMT_END_EXPORT
+
+template <typename T, typename Char>
+template <typename FormatContext>
+FMT_CONSTEXPR FMT_INLINE auto
+formatter<T, Char,
+ enable_if_t<detail::type_constant<T, Char>::value !=
+ detail::type::custom_type>>::format(const T& val,
+ FormatContext& ctx)
+ const -> decltype(ctx.out()) {
+ if (specs_.width_ref.kind != detail::arg_id_kind::none ||
+ specs_.precision_ref.kind != detail::arg_id_kind::none) {
+ auto specs = specs_;
+ detail::handle_dynamic_spec<detail::width_checker>(specs.width,
+ specs.width_ref, ctx);
+ detail::handle_dynamic_spec<detail::precision_checker>(
+ specs.precision, specs.precision_ref, ctx);
+ return detail::write<Char>(ctx.out(), val, specs, ctx.locale());
+ }
+ return detail::write<Char>(ctx.out(), val, specs_, ctx.locale());
+}
+
+FMT_END_NAMESPACE
+
+#ifdef FMT_HEADER_ONLY
+# define FMT_FUNC inline
+# include "format-inl.h"
+#else
+# define FMT_FUNC
+#endif
+
+#endif // FMT_FORMAT_H_
diff --git a/contrib/fmt/include/fmt/locale.h b/contrib/fmt/include/fmt/locale.h
new file mode 100644
index 0000000..7571b52
--- /dev/null
+++ b/contrib/fmt/include/fmt/locale.h
@@ -0,0 +1,2 @@
+#include "xchar.h"
+#warning fmt/locale.h is deprecated, include fmt/format.h or fmt/xchar.h instead
diff --git a/contrib/fmt/include/fmt/os.h b/contrib/fmt/include/fmt/os.h
new file mode 100644
index 0000000..ec29040
--- /dev/null
+++ b/contrib/fmt/include/fmt/os.h
@@ -0,0 +1,451 @@
+// Formatting library for C++ - optional OS-specific functionality
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_OS_H_
+#define FMT_OS_H_
+
+#include <cerrno>
+#include <cstddef>
+#include <cstdio>
+#include <system_error> // std::system_error
+
+#if defined __APPLE__ || defined(__FreeBSD__)
+# include <xlocale.h> // for LC_NUMERIC_MASK on OS X
+#endif
+
+#include "format.h"
+
+#ifndef FMT_USE_FCNTL
+// UWP doesn't provide _pipe.
+# if FMT_HAS_INCLUDE("winapifamily.h")
+# include <winapifamily.h>
+# endif
+# if (FMT_HAS_INCLUDE(<fcntl.h>) || defined(__APPLE__) || \
+ defined(__linux__)) && \
+ (!defined(WINAPI_FAMILY) || \
+ (WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP))
+# include <fcntl.h> // for O_RDONLY
+# define FMT_USE_FCNTL 1
+# else
+# define FMT_USE_FCNTL 0
+# endif
+#endif
+
+#ifndef FMT_POSIX
+# if defined(_WIN32) && !defined(__MINGW32__)
+// Fix warnings about deprecated symbols.
+# define FMT_POSIX(call) _##call
+# else
+# define FMT_POSIX(call) call
+# endif
+#endif
+
+// Calls to system functions are wrapped in FMT_SYSTEM for testability.
+#ifdef FMT_SYSTEM
+# define FMT_POSIX_CALL(call) FMT_SYSTEM(call)
+#else
+# define FMT_SYSTEM(call) ::call
+# ifdef _WIN32
+// Fix warnings about deprecated symbols.
+# define FMT_POSIX_CALL(call) ::_##call
+# else
+# define FMT_POSIX_CALL(call) ::call
+# endif
+#endif
+
+// Retries the expression while it evaluates to error_result and errno
+// equals to EINTR.
+#ifndef _WIN32
+# define FMT_RETRY_VAL(result, expression, error_result) \
+ do { \
+ (result) = (expression); \
+ } while ((result) == (error_result) && errno == EINTR)
+#else
+# define FMT_RETRY_VAL(result, expression, error_result) result = (expression)
+#endif
+
+#define FMT_RETRY(result, expression) FMT_RETRY_VAL(result, expression, -1)
+
+FMT_BEGIN_NAMESPACE
+FMT_BEGIN_EXPORT
+
+/**
+ \rst
+ A reference to a null-terminated string. It can be constructed from a C
+ string or ``std::string``.
+
+ You can use one of the following type aliases for common character types:
+
+ +---------------+-----------------------------+
+ | Type | Definition |
+ +===============+=============================+
+ | cstring_view | basic_cstring_view<char> |
+ +---------------+-----------------------------+
+ | wcstring_view | basic_cstring_view<wchar_t> |
+ +---------------+-----------------------------+
+
+ This class is most useful as a parameter type to allow passing
+ different types of strings to a function, for example::
+
+ template <typename... Args>
+ std::string format(cstring_view format_str, const Args & ... args);
+
+ format("{}", 42);
+ format(std::string("{}"), 42);
+ \endrst
+ */
+template <typename Char> class basic_cstring_view {
+ private:
+ const Char* data_;
+
+ public:
+ /** Constructs a string reference object from a C string. */
+ basic_cstring_view(const Char* s) : data_(s) {}
+
+ /**
+ \rst
+ Constructs a string reference from an ``std::string`` object.
+ \endrst
+ */
+ basic_cstring_view(const std::basic_string<Char>& s) : data_(s.c_str()) {}
+
+ /** Returns the pointer to a C string. */
+ const Char* c_str() const { return data_; }
+};
+
+using cstring_view = basic_cstring_view<char>;
+using wcstring_view = basic_cstring_view<wchar_t>;
+
+#ifdef _WIN32
+FMT_API const std::error_category& system_category() noexcept;
+
+FMT_BEGIN_DETAIL_NAMESPACE
+FMT_API void format_windows_error(buffer<char>& out, int error_code,
+ const char* message) noexcept;
+FMT_END_DETAIL_NAMESPACE
+
+FMT_API std::system_error vwindows_error(int error_code, string_view format_str,
+ format_args args);
+
+/**
+ \rst
+ Constructs a :class:`std::system_error` object with the description
+ of the form
+
+ .. parsed-literal::
+ *<message>*: *<system-message>*
+
+ where *<message>* is the formatted message and *<system-message>* is the
+ system message corresponding to the error code.
+ *error_code* is a Windows error code as given by ``GetLastError``.
+ If *error_code* is not a valid error code such as -1, the system message
+ will look like "error -1".
+
+ **Example**::
+
+ // This throws a system_error with the description
+ // cannot open file 'madeup': The system cannot find the file specified.
+ // or similar (system message may vary).
+ const char *filename = "madeup";
+ LPOFSTRUCT of = LPOFSTRUCT();
+ HFILE file = OpenFile(filename, &of, OF_READ);
+ if (file == HFILE_ERROR) {
+ throw fmt::windows_error(GetLastError(),
+ "cannot open file '{}'", filename);
+ }
+ \endrst
+*/
+template <typename... Args>
+std::system_error windows_error(int error_code, string_view message,
+ const Args&... args) {
+ return vwindows_error(error_code, message, fmt::make_format_args(args...));
+}
+
+// Reports a Windows error without throwing an exception.
+// Can be used to report errors from destructors.
+FMT_API void report_windows_error(int error_code, const char* message) noexcept;
+#else
+inline const std::error_category& system_category() noexcept {
+ return std::system_category();
+}
+#endif // _WIN32
+
+// std::system is not available on some platforms such as iOS (#2248).
+#ifdef __OSX__
+template <typename S, typename... Args, typename Char = char_t<S>>
+void say(const S& format_str, Args&&... args) {
+ std::system(format("say \"{}\"", format(format_str, args...)).c_str());
+}
+#endif
+
+// A buffered file.
+class buffered_file {
+ private:
+ FILE* file_;
+
+ friend class file;
+
+ explicit buffered_file(FILE* f) : file_(f) {}
+
+ public:
+ buffered_file(const buffered_file&) = delete;
+ void operator=(const buffered_file&) = delete;
+
+ // Constructs a buffered_file object which doesn't represent any file.
+ buffered_file() noexcept : file_(nullptr) {}
+
+ // Destroys the object closing the file it represents if any.
+ FMT_API ~buffered_file() noexcept;
+
+ public:
+ buffered_file(buffered_file&& other) noexcept : file_(other.file_) {
+ other.file_ = nullptr;
+ }
+
+ buffered_file& operator=(buffered_file&& other) {
+ close();
+ file_ = other.file_;
+ other.file_ = nullptr;
+ return *this;
+ }
+
+ // Opens a file.
+ FMT_API buffered_file(cstring_view filename, cstring_view mode);
+
+ // Closes the file.
+ FMT_API void close();
+
+ // Returns the pointer to a FILE object representing this file.
+ FILE* get() const noexcept { return file_; }
+
+ FMT_API int descriptor() const;
+
+ void vprint(string_view format_str, format_args args) {
+ fmt::vprint(file_, format_str, args);
+ }
+
+ template <typename... Args>
+ inline void print(string_view format_str, const Args&... args) {
+ vprint(format_str, fmt::make_format_args(args...));
+ }
+};
+
+#if FMT_USE_FCNTL
+// A file. Closed file is represented by a file object with descriptor -1.
+// Methods that are not declared with noexcept may throw
+// fmt::system_error in case of failure. Note that some errors such as
+// closing the file multiple times will cause a crash on Windows rather
+// than an exception. You can get standard behavior by overriding the
+// invalid parameter handler with _set_invalid_parameter_handler.
+class FMT_API file {
+ private:
+ int fd_; // File descriptor.
+
+ // Constructs a file object with a given descriptor.
+ explicit file(int fd) : fd_(fd) {}
+
+ public:
+ // Possible values for the oflag argument to the constructor.
+ enum {
+ RDONLY = FMT_POSIX(O_RDONLY), // Open for reading only.
+ WRONLY = FMT_POSIX(O_WRONLY), // Open for writing only.
+ RDWR = FMT_POSIX(O_RDWR), // Open for reading and writing.
+ CREATE = FMT_POSIX(O_CREAT), // Create if the file doesn't exist.
+ APPEND = FMT_POSIX(O_APPEND), // Open in append mode.
+ TRUNC = FMT_POSIX(O_TRUNC) // Truncate the content of the file.
+ };
+
+ // Constructs a file object which doesn't represent any file.
+ file() noexcept : fd_(-1) {}
+
+ // Opens a file and constructs a file object representing this file.
+ file(cstring_view path, int oflag);
+
+ public:
+ file(const file&) = delete;
+ void operator=(const file&) = delete;
+
+ file(file&& other) noexcept : fd_(other.fd_) { other.fd_ = -1; }
+
+ // Move assignment is not noexcept because close may throw.
+ file& operator=(file&& other) {
+ close();
+ fd_ = other.fd_;
+ other.fd_ = -1;
+ return *this;
+ }
+
+ // Destroys the object closing the file it represents if any.
+ ~file() noexcept;
+
+ // Returns the file descriptor.
+ int descriptor() const noexcept { return fd_; }
+
+ // Closes the file.
+ void close();
+
+ // Returns the file size. The size has signed type for consistency with
+ // stat::st_size.
+ long long size() const;
+
+ // Attempts to read count bytes from the file into the specified buffer.
+ size_t read(void* buffer, size_t count);
+
+ // Attempts to write count bytes from the specified buffer to the file.
+ size_t write(const void* buffer, size_t count);
+
+ // Duplicates a file descriptor with the dup function and returns
+ // the duplicate as a file object.
+ static file dup(int fd);
+
+ // Makes fd be the copy of this file descriptor, closing fd first if
+ // necessary.
+ void dup2(int fd);
+
+ // Makes fd be the copy of this file descriptor, closing fd first if
+ // necessary.
+ void dup2(int fd, std::error_code& ec) noexcept;
+
+ // Creates a pipe setting up read_end and write_end file objects for reading
+ // and writing respectively.
+ static void pipe(file& read_end, file& write_end);
+
+ // Creates a buffered_file object associated with this file and detaches
+ // this file object from the file.
+ buffered_file fdopen(const char* mode);
+
+# if defined(_WIN32) && !defined(__MINGW32__)
+ // Opens a file and constructs a file object representing this file by
+ // wcstring_view filename. Windows only.
+ static file open_windows_file(wcstring_view path, int oflag);
+# endif
+};
+
+// Returns the memory page size.
+long getpagesize();
+
+FMT_BEGIN_DETAIL_NAMESPACE
+
+struct buffer_size {
+ buffer_size() = default;
+ size_t value = 0;
+ buffer_size operator=(size_t val) const {
+ auto bs = buffer_size();
+ bs.value = val;
+ return bs;
+ }
+};
+
+struct ostream_params {
+ int oflag = file::WRONLY | file::CREATE | file::TRUNC;
+ size_t buffer_size = BUFSIZ > 32768 ? BUFSIZ : 32768;
+
+ ostream_params() {}
+
+ template <typename... T>
+ ostream_params(T... params, int new_oflag) : ostream_params(params...) {
+ oflag = new_oflag;
+ }
+
+ template <typename... T>
+ ostream_params(T... params, detail::buffer_size bs)
+ : ostream_params(params...) {
+ this->buffer_size = bs.value;
+ }
+
+// Intel has a bug that results in failure to deduce a constructor
+// for empty parameter packs.
+# if defined(__INTEL_COMPILER) && __INTEL_COMPILER < 2000
+ ostream_params(int new_oflag) : oflag(new_oflag) {}
+ ostream_params(detail::buffer_size bs) : buffer_size(bs.value) {}
+# endif
+};
+
+class file_buffer final : public buffer<char> {
+ file file_;
+
+ FMT_API void grow(size_t) override;
+
+ public:
+ FMT_API file_buffer(cstring_view path, const ostream_params& params);
+ FMT_API file_buffer(file_buffer&& other);
+ FMT_API ~file_buffer();
+
+ void flush() {
+ if (size() == 0) return;
+ file_.write(data(), size() * sizeof(data()[0]));
+ clear();
+ }
+
+ void close() {
+ flush();
+ file_.close();
+ }
+};
+
+FMT_END_DETAIL_NAMESPACE
+
+// Added {} below to work around default constructor error known to
+// occur in Xcode versions 7.2.1 and 8.2.1.
+constexpr detail::buffer_size buffer_size{};
+
+/** A fast output stream which is not thread-safe. */
+class FMT_API ostream {
+ private:
+ FMT_MSC_WARNING(suppress : 4251)
+ detail::file_buffer buffer_;
+
+ ostream(cstring_view path, const detail::ostream_params& params)
+ : buffer_(path, params) {}
+
+ public:
+ ostream(ostream&& other) : buffer_(std::move(other.buffer_)) {}
+
+ ~ostream();
+
+ void flush() { buffer_.flush(); }
+
+ template <typename... T>
+ friend ostream output_file(cstring_view path, T... params);
+
+ void close() { buffer_.close(); }
+
+ /**
+ Formats ``args`` according to specifications in ``fmt`` and writes the
+ output to the file.
+ */
+ template <typename... T> void print(format_string<T...> fmt, T&&... args) {
+ vformat_to(detail::buffer_appender<char>(buffer_), fmt,
+ fmt::make_format_args(args...));
+ }
+};
+
+/**
+ \rst
+ Opens a file for writing. Supported parameters passed in *params*:
+
+ * ``<integer>``: Flags passed to `open
+ <https://pubs.opengroup.org/onlinepubs/007904875/functions/open.html>`_
+ (``file::WRONLY | file::CREATE | file::TRUNC`` by default)
+ * ``buffer_size=<integer>``: Output buffer size
+
+ **Example**::
+
+ auto out = fmt::output_file("guide.txt");
+ out.print("Don't {}", "Panic");
+ \endrst
+ */
+template <typename... T>
+inline ostream output_file(cstring_view path, T... params) {
+ return {path, detail::ostream_params(params...)};
+}
+#endif // FMT_USE_FCNTL
+
+FMT_END_EXPORT
+FMT_END_NAMESPACE
+
+#endif // FMT_OS_H_
diff --git a/contrib/fmt/include/fmt/ostream.h b/contrib/fmt/include/fmt/ostream.h
new file mode 100644
index 0000000..ce65909
--- /dev/null
+++ b/contrib/fmt/include/fmt/ostream.h
@@ -0,0 +1,209 @@
+// Formatting library for C++ - std::ostream support
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_OSTREAM_H_
+#define FMT_OSTREAM_H_
+
+#include <fstream> // std::filebuf
+
+#if defined(_WIN32) && defined(__GLIBCXX__)
+# include <ext/stdio_filebuf.h>
+# include <ext/stdio_sync_filebuf.h>
+#elif defined(_WIN32) && defined(_LIBCPP_VERSION)
+# include <__std_stream>
+#endif
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+
+namespace detail {
+
+// Generate a unique explicit instantion in every translation unit using a tag
+// type in an anonymous namespace.
+namespace {
+struct file_access_tag {};
+} // namespace
+template <typename Tag, typename BufType, FILE* BufType::*FileMemberPtr>
+class file_access {
+ friend auto get_file(BufType& obj) -> FILE* { return obj.*FileMemberPtr; }
+};
+
+#if FMT_MSC_VERSION
+template class file_access<file_access_tag, std::filebuf,
+ &std::filebuf::_Myfile>;
+auto get_file(std::filebuf&) -> FILE*;
+#elif defined(_WIN32) && defined(_LIBCPP_VERSION)
+template class file_access<file_access_tag, std::__stdoutbuf<char>,
+ &std::__stdoutbuf<char>::__file_>;
+auto get_file(std::__stdoutbuf<char>&) -> FILE*;
+#endif
+
+inline bool write_ostream_unicode(std::ostream& os, fmt::string_view data) {
+#if FMT_MSC_VERSION
+ if (auto* buf = dynamic_cast<std::filebuf*>(os.rdbuf()))
+ if (FILE* f = get_file(*buf)) return write_console(f, data);
+#elif defined(_WIN32) && defined(__GLIBCXX__)
+ auto* rdbuf = os.rdbuf();
+ FILE* c_file;
+ if (auto* sfbuf = dynamic_cast<__gnu_cxx::stdio_sync_filebuf<char>*>(rdbuf))
+ c_file = sfbuf->file();
+ else if (auto* fbuf = dynamic_cast<__gnu_cxx::stdio_filebuf<char>*>(rdbuf))
+ c_file = fbuf->file();
+ else
+ return false;
+ if (c_file) return write_console(c_file, data);
+#elif defined(_WIN32) && defined(_LIBCPP_VERSION)
+ if (auto* buf = dynamic_cast<std::__stdoutbuf<char>*>(os.rdbuf()))
+ if (FILE* f = get_file(*buf)) return write_console(f, data);
+#else
+ ignore_unused(os, data);
+#endif
+ return false;
+}
+inline bool write_ostream_unicode(std::wostream&,
+ fmt::basic_string_view<wchar_t>) {
+ return false;
+}
+
+// Write the content of buf to os.
+// It is a separate function rather than a part of vprint to simplify testing.
+template <typename Char>
+void write_buffer(std::basic_ostream<Char>& os, buffer<Char>& buf) {
+ const Char* buf_data = buf.data();
+ using unsigned_streamsize = std::make_unsigned<std::streamsize>::type;
+ unsigned_streamsize size = buf.size();
+ unsigned_streamsize max_size = to_unsigned(max_value<std::streamsize>());
+ do {
+ unsigned_streamsize n = size <= max_size ? size : max_size;
+ os.write(buf_data, static_cast<std::streamsize>(n));
+ buf_data += n;
+ size -= n;
+ } while (size != 0);
+}
+
+template <typename Char, typename T>
+void format_value(buffer<Char>& buf, const T& value,
+ locale_ref loc = locale_ref()) {
+ auto&& format_buf = formatbuf<std::basic_streambuf<Char>>(buf);
+ auto&& output = std::basic_ostream<Char>(&format_buf);
+#if !defined(FMT_STATIC_THOUSANDS_SEPARATOR)
+ if (loc) output.imbue(loc.get<std::locale>());
+#endif
+ output << value;
+ output.exceptions(std::ios_base::failbit | std::ios_base::badbit);
+}
+
+template <typename T> struct streamed_view { const T& value; };
+
+} // namespace detail
+
+// Formats an object of type T that has an overloaded ostream operator<<.
+template <typename Char>
+struct basic_ostream_formatter : formatter<basic_string_view<Char>, Char> {
+ void set_debug_format() = delete;
+
+ template <typename T, typename OutputIt>
+ auto format(const T& value, basic_format_context<OutputIt, Char>& ctx) const
+ -> OutputIt {
+ auto buffer = basic_memory_buffer<Char>();
+ detail::format_value(buffer, value, ctx.locale());
+ return formatter<basic_string_view<Char>, Char>::format(
+ {buffer.data(), buffer.size()}, ctx);
+ }
+};
+
+using ostream_formatter = basic_ostream_formatter<char>;
+
+template <typename T, typename Char>
+struct formatter<detail::streamed_view<T>, Char>
+ : basic_ostream_formatter<Char> {
+ template <typename OutputIt>
+ auto format(detail::streamed_view<T> view,
+ basic_format_context<OutputIt, Char>& ctx) const -> OutputIt {
+ return basic_ostream_formatter<Char>::format(view.value, ctx);
+ }
+};
+
+/**
+ \rst
+ Returns a view that formats `value` via an ostream ``operator<<``.
+
+ **Example**::
+
+ fmt::print("Current thread id: {}\n",
+ fmt::streamed(std::this_thread::get_id()));
+ \endrst
+ */
+template <typename T>
+auto streamed(const T& value) -> detail::streamed_view<T> {
+ return {value};
+}
+
+namespace detail {
+
+inline void vprint_directly(std::ostream& os, string_view format_str,
+ format_args args) {
+ auto buffer = memory_buffer();
+ detail::vformat_to(buffer, format_str, args);
+ detail::write_buffer(os, buffer);
+}
+
+} // namespace detail
+
+FMT_MODULE_EXPORT template <typename Char>
+void vprint(std::basic_ostream<Char>& os,
+ basic_string_view<type_identity_t<Char>> format_str,
+ basic_format_args<buffer_context<type_identity_t<Char>>> args) {
+ auto buffer = basic_memory_buffer<Char>();
+ detail::vformat_to(buffer, format_str, args);
+ if (detail::write_ostream_unicode(os, {buffer.data(), buffer.size()})) return;
+ detail::write_buffer(os, buffer);
+}
+
+/**
+ \rst
+ Prints formatted data to the stream *os*.
+
+ **Example**::
+
+ fmt::print(cerr, "Don't {}!", "panic");
+ \endrst
+ */
+FMT_MODULE_EXPORT template <typename... T>
+void print(std::ostream& os, format_string<T...> fmt, T&&... args) {
+ const auto& vargs = fmt::make_format_args(args...);
+ if (detail::is_utf8())
+ vprint(os, fmt, vargs);
+ else
+ detail::vprint_directly(os, fmt, vargs);
+}
+
+FMT_MODULE_EXPORT
+template <typename... Args>
+void print(std::wostream& os,
+ basic_format_string<wchar_t, type_identity_t<Args>...> fmt,
+ Args&&... args) {
+ vprint(os, fmt, fmt::make_format_args<buffer_context<wchar_t>>(args...));
+}
+
+FMT_MODULE_EXPORT template <typename... T>
+void println(std::ostream& os, format_string<T...> fmt, T&&... args) {
+ fmt::print(os, "{}\n", fmt::format(fmt, std::forward<T>(args)...));
+}
+
+FMT_MODULE_EXPORT
+template <typename... Args>
+void println(std::wostream& os,
+ basic_format_string<wchar_t, type_identity_t<Args>...> fmt,
+ Args&&... args) {
+ print(os, L"{}\n", fmt::format(fmt, std::forward<Args>(args)...));
+}
+
+FMT_END_NAMESPACE
+
+#endif // FMT_OSTREAM_H_
diff --git a/contrib/fmt/include/fmt/posix.h b/contrib/fmt/include/fmt/posix.h
new file mode 100644
index 0000000..da19e9d
--- /dev/null
+++ b/contrib/fmt/include/fmt/posix.h
@@ -0,0 +1,2 @@
+#include "os.h"
+#warning "fmt/posix.h is deprecated; use fmt/os.h instead"
diff --git a/contrib/fmt/include/fmt/printf.h b/contrib/fmt/include/fmt/printf.h
new file mode 100644
index 0000000..554715e
--- /dev/null
+++ b/contrib/fmt/include/fmt/printf.h
@@ -0,0 +1,679 @@
+// Formatting library for C++ - legacy printf implementation
+//
+// Copyright (c) 2012 - 2016, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_PRINTF_H_
+#define FMT_PRINTF_H_
+
+#include <algorithm> // std::max
+#include <limits> // std::numeric_limits
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+FMT_BEGIN_EXPORT
+
+template <typename T> struct printf_formatter { printf_formatter() = delete; };
+
+template <typename Char>
+class basic_printf_parse_context : public basic_format_parse_context<Char> {
+ using basic_format_parse_context<Char>::basic_format_parse_context;
+};
+
+template <typename OutputIt, typename Char> class basic_printf_context {
+ private:
+ OutputIt out_;
+ basic_format_args<basic_printf_context> args_;
+
+ public:
+ using char_type = Char;
+ using format_arg = basic_format_arg<basic_printf_context>;
+ using parse_context_type = basic_printf_parse_context<Char>;
+ template <typename T> using formatter_type = printf_formatter<T>;
+
+ /**
+ \rst
+ Constructs a ``printf_context`` object. References to the arguments are
+ stored in the context object so make sure they have appropriate lifetimes.
+ \endrst
+ */
+ basic_printf_context(OutputIt out,
+ basic_format_args<basic_printf_context> args)
+ : out_(out), args_(args) {}
+
+ OutputIt out() { return out_; }
+ void advance_to(OutputIt it) { out_ = it; }
+
+ detail::locale_ref locale() { return {}; }
+
+ format_arg arg(int id) const { return args_.get(id); }
+
+ FMT_CONSTEXPR void on_error(const char* message) {
+ detail::error_handler().on_error(message);
+ }
+};
+
+FMT_BEGIN_DETAIL_NAMESPACE
+
+// Checks if a value fits in int - used to avoid warnings about comparing
+// signed and unsigned integers.
+template <bool IsSigned> struct int_checker {
+ template <typename T> static bool fits_in_int(T value) {
+ unsigned max = max_value<int>();
+ return value <= max;
+ }
+ static bool fits_in_int(bool) { return true; }
+};
+
+template <> struct int_checker<true> {
+ template <typename T> static bool fits_in_int(T value) {
+ return value >= (std::numeric_limits<int>::min)() &&
+ value <= max_value<int>();
+ }
+ static bool fits_in_int(int) { return true; }
+};
+
+class printf_precision_handler {
+ public:
+ template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+ int operator()(T value) {
+ if (!int_checker<std::numeric_limits<T>::is_signed>::fits_in_int(value))
+ throw_format_error("number is too big");
+ return (std::max)(static_cast<int>(value), 0);
+ }
+
+ template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
+ int operator()(T) {
+ throw_format_error("precision is not integer");
+ return 0;
+ }
+};
+
+// An argument visitor that returns true iff arg is a zero integer.
+class is_zero_int {
+ public:
+ template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+ bool operator()(T value) {
+ return value == 0;
+ }
+
+ template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
+ bool operator()(T) {
+ return false;
+ }
+};
+
+template <typename T> struct make_unsigned_or_bool : std::make_unsigned<T> {};
+
+template <> struct make_unsigned_or_bool<bool> { using type = bool; };
+
+template <typename T, typename Context> class arg_converter {
+ private:
+ using char_type = typename Context::char_type;
+
+ basic_format_arg<Context>& arg_;
+ char_type type_;
+
+ public:
+ arg_converter(basic_format_arg<Context>& arg, char_type type)
+ : arg_(arg), type_(type) {}
+
+ void operator()(bool value) {
+ if (type_ != 's') operator()<bool>(value);
+ }
+
+ template <typename U, FMT_ENABLE_IF(std::is_integral<U>::value)>
+ void operator()(U value) {
+ bool is_signed = type_ == 'd' || type_ == 'i';
+ using target_type = conditional_t<std::is_same<T, void>::value, U, T>;
+ if (const_check(sizeof(target_type) <= sizeof(int))) {
+ // Extra casts are used to silence warnings.
+ if (is_signed) {
+ arg_ = detail::make_arg<Context>(
+ static_cast<int>(static_cast<target_type>(value)));
+ } else {
+ using unsigned_type = typename make_unsigned_or_bool<target_type>::type;
+ arg_ = detail::make_arg<Context>(
+ static_cast<unsigned>(static_cast<unsigned_type>(value)));
+ }
+ } else {
+ if (is_signed) {
+ // glibc's printf doesn't sign extend arguments of smaller types:
+ // std::printf("%lld", -42); // prints "4294967254"
+ // but we don't have to do the same because it's a UB.
+ arg_ = detail::make_arg<Context>(static_cast<long long>(value));
+ } else {
+ arg_ = detail::make_arg<Context>(
+ static_cast<typename make_unsigned_or_bool<U>::type>(value));
+ }
+ }
+ }
+
+ template <typename U, FMT_ENABLE_IF(!std::is_integral<U>::value)>
+ void operator()(U) {} // No conversion needed for non-integral types.
+};
+
+// Converts an integer argument to T for printf, if T is an integral type.
+// If T is void, the argument is converted to corresponding signed or unsigned
+// type depending on the type specifier: 'd' and 'i' - signed, other -
+// unsigned).
+template <typename T, typename Context, typename Char>
+void convert_arg(basic_format_arg<Context>& arg, Char type) {
+ visit_format_arg(arg_converter<T, Context>(arg, type), arg);
+}
+
+// Converts an integer argument to char for printf.
+template <typename Context> class char_converter {
+ private:
+ basic_format_arg<Context>& arg_;
+
+ public:
+ explicit char_converter(basic_format_arg<Context>& arg) : arg_(arg) {}
+
+ template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+ void operator()(T value) {
+ arg_ = detail::make_arg<Context>(
+ static_cast<typename Context::char_type>(value));
+ }
+
+ template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
+ void operator()(T) {} // No conversion needed for non-integral types.
+};
+
+// An argument visitor that return a pointer to a C string if argument is a
+// string or null otherwise.
+template <typename Char> struct get_cstring {
+ template <typename T> const Char* operator()(T) { return nullptr; }
+ const Char* operator()(const Char* s) { return s; }
+};
+
+// Checks if an argument is a valid printf width specifier and sets
+// left alignment if it is negative.
+template <typename Char> class printf_width_handler {
+ private:
+ format_specs<Char>& specs_;
+
+ public:
+ explicit printf_width_handler(format_specs<Char>& specs) : specs_(specs) {}
+
+ template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+ unsigned operator()(T value) {
+ auto width = static_cast<uint32_or_64_or_128_t<T>>(value);
+ if (detail::is_negative(value)) {
+ specs_.align = align::left;
+ width = 0 - width;
+ }
+ unsigned int_max = max_value<int>();
+ if (width > int_max) throw_format_error("number is too big");
+ return static_cast<unsigned>(width);
+ }
+
+ template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
+ unsigned operator()(T) {
+ throw_format_error("width is not integer");
+ return 0;
+ }
+};
+
+// Workaround for a bug with the XL compiler when initializing
+// printf_arg_formatter's base class.
+template <typename Char>
+auto make_arg_formatter(buffer_appender<Char> iter, format_specs<Char>& s)
+ -> arg_formatter<Char> {
+ return {iter, s, locale_ref()};
+}
+
+// The ``printf`` argument formatter.
+template <typename OutputIt, typename Char>
+class printf_arg_formatter : public arg_formatter<Char> {
+ private:
+ using base = arg_formatter<Char>;
+ using context_type = basic_printf_context<OutputIt, Char>;
+
+ context_type& context_;
+
+ OutputIt write_null_pointer(bool is_string = false) {
+ auto s = this->specs;
+ s.type = presentation_type::none;
+ return write_bytes(this->out, is_string ? "(null)" : "(nil)", s);
+ }
+
+ public:
+ printf_arg_formatter(OutputIt iter, format_specs<Char>& s, context_type& ctx)
+ : base(make_arg_formatter(iter, s)), context_(ctx) {}
+
+ OutputIt operator()(monostate value) { return base::operator()(value); }
+
+ template <typename T, FMT_ENABLE_IF(detail::is_integral<T>::value)>
+ OutputIt operator()(T value) {
+ // MSVC2013 fails to compile separate overloads for bool and Char so use
+ // std::is_same instead.
+ if (std::is_same<T, Char>::value) {
+ format_specs<Char> fmt_specs = this->specs;
+ if (fmt_specs.type != presentation_type::none &&
+ fmt_specs.type != presentation_type::chr) {
+ return (*this)(static_cast<int>(value));
+ }
+ fmt_specs.sign = sign::none;
+ fmt_specs.alt = false;
+ fmt_specs.fill[0] = ' '; // Ignore '0' flag for char types.
+ // align::numeric needs to be overwritten here since the '0' flag is
+ // ignored for non-numeric types
+ if (fmt_specs.align == align::none || fmt_specs.align == align::numeric)
+ fmt_specs.align = align::right;
+ return write<Char>(this->out, static_cast<Char>(value), fmt_specs);
+ }
+ return base::operator()(value);
+ }
+
+ template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
+ OutputIt operator()(T value) {
+ return base::operator()(value);
+ }
+
+ /** Formats a null-terminated C string. */
+ OutputIt operator()(const char* value) {
+ if (value) return base::operator()(value);
+ return write_null_pointer(this->specs.type != presentation_type::pointer);
+ }
+
+ /** Formats a null-terminated wide C string. */
+ OutputIt operator()(const wchar_t* value) {
+ if (value) return base::operator()(value);
+ return write_null_pointer(this->specs.type != presentation_type::pointer);
+ }
+
+ OutputIt operator()(basic_string_view<Char> value) {
+ return base::operator()(value);
+ }
+
+ /** Formats a pointer. */
+ OutputIt operator()(const void* value) {
+ return value ? base::operator()(value) : write_null_pointer();
+ }
+
+ /** Formats an argument of a custom (user-defined) type. */
+ OutputIt operator()(typename basic_format_arg<context_type>::handle handle) {
+ auto parse_ctx =
+ basic_printf_parse_context<Char>(basic_string_view<Char>());
+ handle.format(parse_ctx, context_);
+ return this->out;
+ }
+};
+
+template <typename Char>
+void parse_flags(format_specs<Char>& specs, const Char*& it, const Char* end) {
+ for (; it != end; ++it) {
+ switch (*it) {
+ case '-':
+ specs.align = align::left;
+ break;
+ case '+':
+ specs.sign = sign::plus;
+ break;
+ case '0':
+ specs.fill[0] = '0';
+ break;
+ case ' ':
+ if (specs.sign != sign::plus) {
+ specs.sign = sign::space;
+ }
+ break;
+ case '#':
+ specs.alt = true;
+ break;
+ default:
+ return;
+ }
+ }
+}
+
+template <typename Char, typename GetArg>
+int parse_header(const Char*& it, const Char* end, format_specs<Char>& specs,
+ GetArg get_arg) {
+ int arg_index = -1;
+ Char c = *it;
+ if (c >= '0' && c <= '9') {
+ // Parse an argument index (if followed by '$') or a width possibly
+ // preceded with '0' flag(s).
+ int value = parse_nonnegative_int(it, end, -1);
+ if (it != end && *it == '$') { // value is an argument index
+ ++it;
+ arg_index = value != -1 ? value : max_value<int>();
+ } else {
+ if (c == '0') specs.fill[0] = '0';
+ if (value != 0) {
+ // Nonzero value means that we parsed width and don't need to
+ // parse it or flags again, so return now.
+ if (value == -1) throw_format_error("number is too big");
+ specs.width = value;
+ return arg_index;
+ }
+ }
+ }
+ parse_flags(specs, it, end);
+ // Parse width.
+ if (it != end) {
+ if (*it >= '0' && *it <= '9') {
+ specs.width = parse_nonnegative_int(it, end, -1);
+ if (specs.width == -1) throw_format_error("number is too big");
+ } else if (*it == '*') {
+ ++it;
+ specs.width = static_cast<int>(visit_format_arg(
+ detail::printf_width_handler<Char>(specs), get_arg(-1)));
+ }
+ }
+ return arg_index;
+}
+
+inline auto parse_printf_presentation_type(char c, type t)
+ -> presentation_type {
+ using pt = presentation_type;
+ constexpr auto integral_set = sint_set | uint_set | bool_set | char_set;
+ switch (c) {
+ case 'd':
+ return in(t, integral_set) ? pt::dec : pt::none;
+ case 'o':
+ return in(t, integral_set) ? pt::oct : pt::none;
+ case 'x':
+ return in(t, integral_set) ? pt::hex_lower : pt::none;
+ case 'X':
+ return in(t, integral_set) ? pt::hex_upper : pt::none;
+ case 'a':
+ return in(t, float_set) ? pt::hexfloat_lower : pt::none;
+ case 'A':
+ return in(t, float_set) ? pt::hexfloat_upper : pt::none;
+ case 'e':
+ return in(t, float_set) ? pt::exp_lower : pt::none;
+ case 'E':
+ return in(t, float_set) ? pt::exp_upper : pt::none;
+ case 'f':
+ return in(t, float_set) ? pt::fixed_lower : pt::none;
+ case 'F':
+ return in(t, float_set) ? pt::fixed_upper : pt::none;
+ case 'g':
+ return in(t, float_set) ? pt::general_lower : pt::none;
+ case 'G':
+ return in(t, float_set) ? pt::general_upper : pt::none;
+ case 'c':
+ return in(t, integral_set) ? pt::chr : pt::none;
+ case 's':
+ return in(t, string_set | cstring_set) ? pt::string : pt::none;
+ case 'p':
+ return in(t, pointer_set | cstring_set) ? pt::pointer : pt::none;
+ default:
+ return pt::none;
+ }
+}
+
+template <typename Char, typename Context>
+void vprintf(buffer<Char>& buf, basic_string_view<Char> format,
+ basic_format_args<Context> args) {
+ using iterator = buffer_appender<Char>;
+ auto out = iterator(buf);
+ auto context = basic_printf_context<iterator, Char>(out, args);
+ auto parse_ctx = basic_printf_parse_context<Char>(format);
+
+ // Returns the argument with specified index or, if arg_index is -1, the next
+ // argument.
+ auto get_arg = [&](int arg_index) {
+ if (arg_index < 0)
+ arg_index = parse_ctx.next_arg_id();
+ else
+ parse_ctx.check_arg_id(--arg_index);
+ return detail::get_arg(context, arg_index);
+ };
+
+ const Char* start = parse_ctx.begin();
+ const Char* end = parse_ctx.end();
+ auto it = start;
+ while (it != end) {
+ if (!find<false, Char>(it, end, '%', it)) {
+ it = end; // find leaves it == nullptr if it doesn't find '%'.
+ break;
+ }
+ Char c = *it++;
+ if (it != end && *it == c) {
+ out = write(out, basic_string_view<Char>(start, to_unsigned(it - start)));
+ start = ++it;
+ continue;
+ }
+ out =
+ write(out, basic_string_view<Char>(start, to_unsigned(it - 1 - start)));
+
+ auto specs = format_specs<Char>();
+ specs.align = align::right;
+
+ // Parse argument index, flags and width.
+ int arg_index = parse_header(it, end, specs, get_arg);
+ if (arg_index == 0) throw_format_error("argument not found");
+
+ // Parse precision.
+ if (it != end && *it == '.') {
+ ++it;
+ c = it != end ? *it : 0;
+ if ('0' <= c && c <= '9') {
+ specs.precision = parse_nonnegative_int(it, end, 0);
+ } else if (c == '*') {
+ ++it;
+ specs.precision = static_cast<int>(
+ visit_format_arg(printf_precision_handler(), get_arg(-1)));
+ } else {
+ specs.precision = 0;
+ }
+ }
+
+ auto arg = get_arg(arg_index);
+ // For d, i, o, u, x, and X conversion specifiers, if a precision is
+ // specified, the '0' flag is ignored
+ if (specs.precision >= 0 && arg.is_integral())
+ specs.fill[0] =
+ ' '; // Ignore '0' flag for non-numeric types or if '-' present.
+ if (specs.precision >= 0 && arg.type() == type::cstring_type) {
+ auto str = visit_format_arg(get_cstring<Char>(), arg);
+ auto str_end = str + specs.precision;
+ auto nul = std::find(str, str_end, Char());
+ arg = make_arg<basic_printf_context<iterator, Char>>(
+ basic_string_view<Char>(
+ str, to_unsigned(nul != str_end ? nul - str : specs.precision)));
+ }
+ if (specs.alt && visit_format_arg(is_zero_int(), arg)) specs.alt = false;
+ if (specs.fill[0] == '0') {
+ if (arg.is_arithmetic() && specs.align != align::left)
+ specs.align = align::numeric;
+ else
+ specs.fill[0] = ' '; // Ignore '0' flag for non-numeric types or if '-'
+ // flag is also present.
+ }
+
+ // Parse length and convert the argument to the required type.
+ c = it != end ? *it++ : 0;
+ Char t = it != end ? *it : 0;
+ switch (c) {
+ case 'h':
+ if (t == 'h') {
+ ++it;
+ t = it != end ? *it : 0;
+ convert_arg<signed char>(arg, t);
+ } else {
+ convert_arg<short>(arg, t);
+ }
+ break;
+ case 'l':
+ if (t == 'l') {
+ ++it;
+ t = it != end ? *it : 0;
+ convert_arg<long long>(arg, t);
+ } else {
+ convert_arg<long>(arg, t);
+ }
+ break;
+ case 'j':
+ convert_arg<intmax_t>(arg, t);
+ break;
+ case 'z':
+ convert_arg<size_t>(arg, t);
+ break;
+ case 't':
+ convert_arg<std::ptrdiff_t>(arg, t);
+ break;
+ case 'L':
+ // printf produces garbage when 'L' is omitted for long double, no
+ // need to do the same.
+ break;
+ default:
+ --it;
+ convert_arg<void>(arg, c);
+ }
+
+ // Parse type.
+ if (it == end) throw_format_error("invalid format string");
+ char type = static_cast<char>(*it++);
+ if (arg.is_integral()) {
+ // Normalize type.
+ switch (type) {
+ case 'i':
+ case 'u':
+ type = 'd';
+ break;
+ case 'c':
+ visit_format_arg(
+ char_converter<basic_printf_context<iterator, Char>>(arg), arg);
+ break;
+ }
+ }
+ specs.type = parse_printf_presentation_type(type, arg.type());
+ if (specs.type == presentation_type::none)
+ throw_format_error("invalid format specifier");
+
+ start = it;
+
+ // Format argument.
+ out = visit_format_arg(
+ printf_arg_formatter<iterator, Char>(out, specs, context), arg);
+ }
+ write(out, basic_string_view<Char>(start, to_unsigned(it - start)));
+}
+FMT_END_DETAIL_NAMESPACE
+
+template <typename Char>
+using basic_printf_context_t =
+ basic_printf_context<detail::buffer_appender<Char>, Char>;
+
+using printf_context = basic_printf_context_t<char>;
+using wprintf_context = basic_printf_context_t<wchar_t>;
+
+using printf_args = basic_format_args<printf_context>;
+using wprintf_args = basic_format_args<wprintf_context>;
+
+/**
+ \rst
+ Constructs an `~fmt::format_arg_store` object that contains references to
+ arguments and can be implicitly converted to `~fmt::printf_args`.
+ \endrst
+ */
+template <typename... T>
+inline auto make_printf_args(const T&... args)
+ -> format_arg_store<printf_context, T...> {
+ return {args...};
+}
+
+/**
+ \rst
+ Constructs an `~fmt::format_arg_store` object that contains references to
+ arguments and can be implicitly converted to `~fmt::wprintf_args`.
+ \endrst
+ */
+template <typename... T>
+inline auto make_wprintf_args(const T&... args)
+ -> format_arg_store<wprintf_context, T...> {
+ return {args...};
+}
+
+template <typename S, typename Char = char_t<S>>
+inline auto vsprintf(
+ const S& fmt,
+ basic_format_args<basic_printf_context_t<type_identity_t<Char>>> args)
+ -> std::basic_string<Char> {
+ auto buf = basic_memory_buffer<Char>();
+ detail::vprintf(buf, detail::to_string_view(fmt), args);
+ return to_string(buf);
+}
+
+/**
+ \rst
+ Formats arguments and returns the result as a string.
+
+ **Example**::
+
+ std::string message = fmt::sprintf("The answer is %d", 42);
+ \endrst
+*/
+template <typename S, typename... T,
+ typename Char = enable_if_t<detail::is_string<S>::value, char_t<S>>>
+inline auto sprintf(const S& fmt, const T&... args) -> std::basic_string<Char> {
+ using context = basic_printf_context_t<Char>;
+ return vsprintf(detail::to_string_view(fmt),
+ fmt::make_format_args<context>(args...));
+}
+
+template <typename S, typename Char = char_t<S>>
+inline auto vfprintf(
+ std::FILE* f, const S& fmt,
+ basic_format_args<basic_printf_context_t<type_identity_t<Char>>> args)
+ -> int {
+ auto buf = basic_memory_buffer<Char>();
+ detail::vprintf(buf, detail::to_string_view(fmt), args);
+ size_t size = buf.size();
+ return std::fwrite(buf.data(), sizeof(Char), size, f) < size
+ ? -1
+ : static_cast<int>(size);
+}
+
+/**
+ \rst
+ Prints formatted data to the file *f*.
+
+ **Example**::
+
+ fmt::fprintf(stderr, "Don't %s!", "panic");
+ \endrst
+ */
+template <typename S, typename... T, typename Char = char_t<S>>
+inline auto fprintf(std::FILE* f, const S& fmt, const T&... args) -> int {
+ using context = basic_printf_context_t<Char>;
+ return vfprintf(f, detail::to_string_view(fmt),
+ fmt::make_format_args<context>(args...));
+}
+
+template <typename S, typename Char = char_t<S>>
+inline auto vprintf(
+ const S& fmt,
+ basic_format_args<basic_printf_context_t<type_identity_t<Char>>> args)
+ -> int {
+ return vfprintf(stdout, detail::to_string_view(fmt), args);
+}
+
+/**
+ \rst
+ Prints formatted data to ``stdout``.
+
+ **Example**::
+
+ fmt::printf("Elapsed time: %.2f seconds", 1.23);
+ \endrst
+ */
+template <typename S, typename... T, FMT_ENABLE_IF(detail::is_string<S>::value)>
+inline auto printf(const S& fmt, const T&... args) -> int {
+ return vprintf(
+ detail::to_string_view(fmt),
+ fmt::make_format_args<basic_printf_context_t<char_t<S>>>(args...));
+}
+
+FMT_END_EXPORT
+FMT_END_NAMESPACE
+
+#endif // FMT_PRINTF_H_
diff --git a/contrib/fmt/include/fmt/ranges.h b/contrib/fmt/include/fmt/ranges.h
new file mode 100644
index 0000000..266b9e1
--- /dev/null
+++ b/contrib/fmt/include/fmt/ranges.h
@@ -0,0 +1,732 @@
+// Formatting library for C++ - experimental range support
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+//
+// Copyright (c) 2018 - present, Remotion (Igor Schulz)
+// All Rights Reserved
+// {fmt} support for ranges, containers and types tuple interface.
+
+#ifndef FMT_RANGES_H_
+#define FMT_RANGES_H_
+
+#include <initializer_list>
+#include <tuple>
+#include <type_traits>
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+
+namespace detail {
+
+template <typename Range, typename OutputIt>
+auto copy(const Range& range, OutputIt out) -> OutputIt {
+ for (auto it = range.begin(), end = range.end(); it != end; ++it)
+ *out++ = *it;
+ return out;
+}
+
+template <typename OutputIt>
+auto copy(const char* str, OutputIt out) -> OutputIt {
+ while (*str) *out++ = *str++;
+ return out;
+}
+
+template <typename OutputIt> auto copy(char ch, OutputIt out) -> OutputIt {
+ *out++ = ch;
+ return out;
+}
+
+template <typename OutputIt> auto copy(wchar_t ch, OutputIt out) -> OutputIt {
+ *out++ = ch;
+ return out;
+}
+
+// Returns true if T has a std::string-like interface, like std::string_view.
+template <typename T> class is_std_string_like {
+ template <typename U>
+ static auto check(U* p)
+ -> decltype((void)p->find('a'), p->length(), (void)p->data(), int());
+ template <typename> static void check(...);
+
+ public:
+ static constexpr const bool value =
+ is_string<T>::value ||
+ std::is_convertible<T, std_string_view<char>>::value ||
+ !std::is_void<decltype(check<T>(nullptr))>::value;
+};
+
+template <typename Char>
+struct is_std_string_like<fmt::basic_string_view<Char>> : std::true_type {};
+
+template <typename T> class is_map {
+ template <typename U> static auto check(U*) -> typename U::mapped_type;
+ template <typename> static void check(...);
+
+ public:
+#ifdef FMT_FORMAT_MAP_AS_LIST // DEPRECATED!
+ static constexpr const bool value = false;
+#else
+ static constexpr const bool value =
+ !std::is_void<decltype(check<T>(nullptr))>::value;
+#endif
+};
+
+template <typename T> class is_set {
+ template <typename U> static auto check(U*) -> typename U::key_type;
+ template <typename> static void check(...);
+
+ public:
+#ifdef FMT_FORMAT_SET_AS_LIST // DEPRECATED!
+ static constexpr const bool value = false;
+#else
+ static constexpr const bool value =
+ !std::is_void<decltype(check<T>(nullptr))>::value && !is_map<T>::value;
+#endif
+};
+
+template <typename... Ts> struct conditional_helper {};
+
+template <typename T, typename _ = void> struct is_range_ : std::false_type {};
+
+#if !FMT_MSC_VERSION || FMT_MSC_VERSION > 1800
+
+# define FMT_DECLTYPE_RETURN(val) \
+ ->decltype(val) { return val; } \
+ static_assert( \
+ true, "") // This makes it so that a semicolon is required after the
+ // macro, which helps clang-format handle the formatting.
+
+// C array overload
+template <typename T, std::size_t N>
+auto range_begin(const T (&arr)[N]) -> const T* {
+ return arr;
+}
+template <typename T, std::size_t N>
+auto range_end(const T (&arr)[N]) -> const T* {
+ return arr + N;
+}
+
+template <typename T, typename Enable = void>
+struct has_member_fn_begin_end_t : std::false_type {};
+
+template <typename T>
+struct has_member_fn_begin_end_t<T, void_t<decltype(std::declval<T>().begin()),
+ decltype(std::declval<T>().end())>>
+ : std::true_type {};
+
+// Member function overload
+template <typename T>
+auto range_begin(T&& rng) FMT_DECLTYPE_RETURN(static_cast<T&&>(rng).begin());
+template <typename T>
+auto range_end(T&& rng) FMT_DECLTYPE_RETURN(static_cast<T&&>(rng).end());
+
+// ADL overload. Only participates in overload resolution if member functions
+// are not found.
+template <typename T>
+auto range_begin(T&& rng)
+ -> enable_if_t<!has_member_fn_begin_end_t<T&&>::value,
+ decltype(begin(static_cast<T&&>(rng)))> {
+ return begin(static_cast<T&&>(rng));
+}
+template <typename T>
+auto range_end(T&& rng) -> enable_if_t<!has_member_fn_begin_end_t<T&&>::value,
+ decltype(end(static_cast<T&&>(rng)))> {
+ return end(static_cast<T&&>(rng));
+}
+
+template <typename T, typename Enable = void>
+struct has_const_begin_end : std::false_type {};
+template <typename T, typename Enable = void>
+struct has_mutable_begin_end : std::false_type {};
+
+template <typename T>
+struct has_const_begin_end<
+ T,
+ void_t<
+ decltype(detail::range_begin(std::declval<const remove_cvref_t<T>&>())),
+ decltype(detail::range_end(std::declval<const remove_cvref_t<T>&>()))>>
+ : std::true_type {};
+
+template <typename T>
+struct has_mutable_begin_end<
+ T, void_t<decltype(detail::range_begin(std::declval<T>())),
+ decltype(detail::range_end(std::declval<T>())),
+ // the extra int here is because older versions of MSVC don't
+ // SFINAE properly unless there are distinct types
+ int>> : std::true_type {};
+
+template <typename T>
+struct is_range_<T, void>
+ : std::integral_constant<bool, (has_const_begin_end<T>::value ||
+ has_mutable_begin_end<T>::value)> {};
+# undef FMT_DECLTYPE_RETURN
+#endif
+
+// tuple_size and tuple_element check.
+template <typename T> class is_tuple_like_ {
+ template <typename U>
+ static auto check(U* p) -> decltype(std::tuple_size<U>::value, int());
+ template <typename> static void check(...);
+
+ public:
+ static constexpr const bool value =
+ !std::is_void<decltype(check<T>(nullptr))>::value;
+};
+
+// Check for integer_sequence
+#if defined(__cpp_lib_integer_sequence) || FMT_MSC_VERSION >= 1900
+template <typename T, T... N>
+using integer_sequence = std::integer_sequence<T, N...>;
+template <size_t... N> using index_sequence = std::index_sequence<N...>;
+template <size_t N> using make_index_sequence = std::make_index_sequence<N>;
+#else
+template <typename T, T... N> struct integer_sequence {
+ using value_type = T;
+
+ static FMT_CONSTEXPR size_t size() { return sizeof...(N); }
+};
+
+template <size_t... N> using index_sequence = integer_sequence<size_t, N...>;
+
+template <typename T, size_t N, T... Ns>
+struct make_integer_sequence : make_integer_sequence<T, N - 1, N - 1, Ns...> {};
+template <typename T, T... Ns>
+struct make_integer_sequence<T, 0, Ns...> : integer_sequence<T, Ns...> {};
+
+template <size_t N>
+using make_index_sequence = make_integer_sequence<size_t, N>;
+#endif
+
+template <typename T>
+using tuple_index_sequence = make_index_sequence<std::tuple_size<T>::value>;
+
+template <typename T, typename C, bool = is_tuple_like_<T>::value>
+class is_tuple_formattable_ {
+ public:
+ static constexpr const bool value = false;
+};
+template <typename T, typename C> class is_tuple_formattable_<T, C, true> {
+ template <std::size_t... Is>
+ static std::true_type check2(index_sequence<Is...>,
+ integer_sequence<bool, (Is == Is)...>);
+ static std::false_type check2(...);
+ template <std::size_t... Is>
+ static decltype(check2(
+ index_sequence<Is...>{},
+ integer_sequence<
+ bool, (is_formattable<typename std::tuple_element<Is, T>::type,
+ C>::value)...>{})) check(index_sequence<Is...>);
+
+ public:
+ static constexpr const bool value =
+ decltype(check(tuple_index_sequence<T>{}))::value;
+};
+
+template <typename Tuple, typename F, size_t... Is>
+FMT_CONSTEXPR void for_each(index_sequence<Is...>, Tuple&& t, F&& f) {
+ using std::get;
+ // Using a free function get<Is>(Tuple) now.
+ const int unused[] = {0, ((void)f(get<Is>(t)), 0)...};
+ ignore_unused(unused);
+}
+
+template <typename Tuple, typename F>
+FMT_CONSTEXPR void for_each(Tuple&& t, F&& f) {
+ for_each(tuple_index_sequence<remove_cvref_t<Tuple>>(),
+ std::forward<Tuple>(t), std::forward<F>(f));
+}
+
+template <typename Tuple1, typename Tuple2, typename F, size_t... Is>
+void for_each2(index_sequence<Is...>, Tuple1&& t1, Tuple2&& t2, F&& f) {
+ using std::get;
+ const int unused[] = {0, ((void)f(get<Is>(t1), get<Is>(t2)), 0)...};
+ ignore_unused(unused);
+}
+
+template <typename Tuple1, typename Tuple2, typename F>
+void for_each2(Tuple1&& t1, Tuple2&& t2, F&& f) {
+ for_each2(tuple_index_sequence<remove_cvref_t<Tuple1>>(),
+ std::forward<Tuple1>(t1), std::forward<Tuple2>(t2),
+ std::forward<F>(f));
+}
+
+namespace tuple {
+// Workaround a bug in MSVC 2019 (v140).
+template <typename Char, typename... T>
+using result_t = std::tuple<formatter<remove_cvref_t<T>, Char>...>;
+
+using std::get;
+template <typename Tuple, typename Char, std::size_t... Is>
+auto get_formatters(index_sequence<Is...>)
+ -> result_t<Char, decltype(get<Is>(std::declval<Tuple>()))...>;
+} // namespace tuple
+
+#if FMT_MSC_VERSION && FMT_MSC_VERSION < 1920
+// Older MSVC doesn't get the reference type correctly for arrays.
+template <typename R> struct range_reference_type_impl {
+ using type = decltype(*detail::range_begin(std::declval<R&>()));
+};
+
+template <typename T, std::size_t N> struct range_reference_type_impl<T[N]> {
+ using type = T&;
+};
+
+template <typename T>
+using range_reference_type = typename range_reference_type_impl<T>::type;
+#else
+template <typename Range>
+using range_reference_type =
+ decltype(*detail::range_begin(std::declval<Range&>()));
+#endif
+
+// We don't use the Range's value_type for anything, but we do need the Range's
+// reference type, with cv-ref stripped.
+template <typename Range>
+using uncvref_type = remove_cvref_t<range_reference_type<Range>>;
+
+template <typename Formatter>
+FMT_CONSTEXPR auto maybe_set_debug_format(Formatter& f, bool set)
+ -> decltype(f.set_debug_format(set)) {
+ f.set_debug_format(set);
+}
+template <typename Formatter>
+FMT_CONSTEXPR void maybe_set_debug_format(Formatter&, ...) {}
+
+// These are not generic lambdas for compatibility with C++11.
+template <typename ParseContext> struct parse_empty_specs {
+ template <typename Formatter> FMT_CONSTEXPR void operator()(Formatter& f) {
+ f.parse(ctx);
+ detail::maybe_set_debug_format(f, true);
+ }
+ ParseContext& ctx;
+};
+template <typename FormatContext> struct format_tuple_element {
+ using char_type = typename FormatContext::char_type;
+
+ template <typename T>
+ void operator()(const formatter<T, char_type>& f, const T& v) {
+ if (i > 0)
+ ctx.advance_to(detail::copy_str<char_type>(separator, ctx.out()));
+ ctx.advance_to(f.format(v, ctx));
+ ++i;
+ }
+
+ int i;
+ FormatContext& ctx;
+ basic_string_view<char_type> separator;
+};
+
+} // namespace detail
+
+template <typename T> struct is_tuple_like {
+ static constexpr const bool value =
+ detail::is_tuple_like_<T>::value && !detail::is_range_<T>::value;
+};
+
+template <typename T, typename C> struct is_tuple_formattable {
+ static constexpr const bool value =
+ detail::is_tuple_formattable_<T, C>::value;
+};
+
+template <typename Tuple, typename Char>
+struct formatter<Tuple, Char,
+ enable_if_t<fmt::is_tuple_like<Tuple>::value &&
+ fmt::is_tuple_formattable<Tuple, Char>::value>> {
+ private:
+ decltype(detail::tuple::get_formatters<Tuple, Char>(
+ detail::tuple_index_sequence<Tuple>())) formatters_;
+
+ basic_string_view<Char> separator_ = detail::string_literal<Char, ',', ' '>{};
+ basic_string_view<Char> opening_bracket_ =
+ detail::string_literal<Char, '('>{};
+ basic_string_view<Char> closing_bracket_ =
+ detail::string_literal<Char, ')'>{};
+
+ public:
+ FMT_CONSTEXPR formatter() {}
+
+ FMT_CONSTEXPR void set_separator(basic_string_view<Char> sep) {
+ separator_ = sep;
+ }
+
+ FMT_CONSTEXPR void set_brackets(basic_string_view<Char> open,
+ basic_string_view<Char> close) {
+ opening_bracket_ = open;
+ closing_bracket_ = close;
+ }
+
+ template <typename ParseContext>
+ FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+ auto it = ctx.begin();
+ if (it != ctx.end() && *it != '}')
+ FMT_THROW(format_error("invalid format specifier"));
+ detail::for_each(formatters_, detail::parse_empty_specs<ParseContext>{ctx});
+ return it;
+ }
+
+ template <typename FormatContext>
+ auto format(const Tuple& value, FormatContext& ctx) const
+ -> decltype(ctx.out()) {
+ ctx.advance_to(detail::copy_str<Char>(opening_bracket_, ctx.out()));
+ detail::for_each2(
+ formatters_, value,
+ detail::format_tuple_element<FormatContext>{0, ctx, separator_});
+ return detail::copy_str<Char>(closing_bracket_, ctx.out());
+ }
+};
+
+template <typename T, typename Char> struct is_range {
+ static constexpr const bool value =
+ detail::is_range_<T>::value && !detail::is_std_string_like<T>::value &&
+ !std::is_convertible<T, std::basic_string<Char>>::value &&
+ !std::is_convertible<T, detail::std_string_view<Char>>::value;
+};
+
+namespace detail {
+template <typename Context> struct range_mapper {
+ using mapper = arg_mapper<Context>;
+
+ template <typename T,
+ FMT_ENABLE_IF(has_formatter<remove_cvref_t<T>, Context>::value)>
+ static auto map(T&& value) -> T&& {
+ return static_cast<T&&>(value);
+ }
+ template <typename T,
+ FMT_ENABLE_IF(!has_formatter<remove_cvref_t<T>, Context>::value)>
+ static auto map(T&& value)
+ -> decltype(mapper().map(static_cast<T&&>(value))) {
+ return mapper().map(static_cast<T&&>(value));
+ }
+};
+
+template <typename Char, typename Element>
+using range_formatter_type =
+ formatter<remove_cvref_t<decltype(range_mapper<buffer_context<Char>>{}.map(
+ std::declval<Element>()))>,
+ Char>;
+
+template <typename R>
+using maybe_const_range =
+ conditional_t<has_const_begin_end<R>::value, const R, R>;
+
+// Workaround a bug in MSVC 2015 and earlier.
+#if !FMT_MSC_VERSION || FMT_MSC_VERSION >= 1910
+template <typename R, typename Char>
+struct is_formattable_delayed
+ : is_formattable<uncvref_type<maybe_const_range<R>>, Char> {};
+#endif
+} // namespace detail
+
+template <typename T, typename Char, typename Enable = void>
+struct range_formatter;
+
+template <typename T, typename Char>
+struct range_formatter<
+ T, Char,
+ enable_if_t<conjunction<std::is_same<T, remove_cvref_t<T>>,
+ is_formattable<T, Char>>::value>> {
+ private:
+ detail::range_formatter_type<Char, T> underlying_;
+ basic_string_view<Char> separator_ = detail::string_literal<Char, ',', ' '>{};
+ basic_string_view<Char> opening_bracket_ =
+ detail::string_literal<Char, '['>{};
+ basic_string_view<Char> closing_bracket_ =
+ detail::string_literal<Char, ']'>{};
+
+ public:
+ FMT_CONSTEXPR range_formatter() {}
+
+ FMT_CONSTEXPR auto underlying() -> detail::range_formatter_type<Char, T>& {
+ return underlying_;
+ }
+
+ FMT_CONSTEXPR void set_separator(basic_string_view<Char> sep) {
+ separator_ = sep;
+ }
+
+ FMT_CONSTEXPR void set_brackets(basic_string_view<Char> open,
+ basic_string_view<Char> close) {
+ opening_bracket_ = open;
+ closing_bracket_ = close;
+ }
+
+ template <typename ParseContext>
+ FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+ auto it = ctx.begin();
+ auto end = ctx.end();
+
+ if (it != end && *it == 'n') {
+ set_brackets({}, {});
+ ++it;
+ }
+
+ if (it != end && *it != '}') {
+ if (*it != ':') FMT_THROW(format_error("invalid format specifier"));
+ ++it;
+ } else {
+ detail::maybe_set_debug_format(underlying_, true);
+ }
+
+ ctx.advance_to(it);
+ return underlying_.parse(ctx);
+ }
+
+ template <typename R, typename FormatContext>
+ auto format(R&& range, FormatContext& ctx) const -> decltype(ctx.out()) {
+ detail::range_mapper<buffer_context<Char>> mapper;
+ auto out = ctx.out();
+ out = detail::copy_str<Char>(opening_bracket_, out);
+ int i = 0;
+ auto it = detail::range_begin(range);
+ auto end = detail::range_end(range);
+ for (; it != end; ++it) {
+ if (i > 0) out = detail::copy_str<Char>(separator_, out);
+ ctx.advance_to(out);
+ out = underlying_.format(mapper.map(*it), ctx);
+ ++i;
+ }
+ out = detail::copy_str<Char>(closing_bracket_, out);
+ return out;
+ }
+};
+
+enum class range_format { disabled, map, set, sequence, string, debug_string };
+
+namespace detail {
+template <typename T>
+struct range_format_kind_
+ : std::integral_constant<range_format,
+ std::is_same<uncvref_type<T>, T>::value
+ ? range_format::disabled
+ : is_map<T>::value ? range_format::map
+ : is_set<T>::value ? range_format::set
+ : range_format::sequence> {};
+
+template <range_format K, typename R, typename Char, typename Enable = void>
+struct range_default_formatter;
+
+template <range_format K>
+using range_format_constant = std::integral_constant<range_format, K>;
+
+template <range_format K, typename R, typename Char>
+struct range_default_formatter<
+ K, R, Char,
+ enable_if_t<(K == range_format::sequence || K == range_format::map ||
+ K == range_format::set)>> {
+ using range_type = detail::maybe_const_range<R>;
+ range_formatter<detail::uncvref_type<range_type>, Char> underlying_;
+
+ FMT_CONSTEXPR range_default_formatter() { init(range_format_constant<K>()); }
+
+ FMT_CONSTEXPR void init(range_format_constant<range_format::set>) {
+ underlying_.set_brackets(detail::string_literal<Char, '{'>{},
+ detail::string_literal<Char, '}'>{});
+ }
+
+ FMT_CONSTEXPR void init(range_format_constant<range_format::map>) {
+ underlying_.set_brackets(detail::string_literal<Char, '{'>{},
+ detail::string_literal<Char, '}'>{});
+ underlying_.underlying().set_brackets({}, {});
+ underlying_.underlying().set_separator(
+ detail::string_literal<Char, ':', ' '>{});
+ }
+
+ FMT_CONSTEXPR void init(range_format_constant<range_format::sequence>) {}
+
+ template <typename ParseContext>
+ FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+ return underlying_.parse(ctx);
+ }
+
+ template <typename FormatContext>
+ auto format(range_type& range, FormatContext& ctx) const
+ -> decltype(ctx.out()) {
+ return underlying_.format(range, ctx);
+ }
+};
+} // namespace detail
+
+template <typename T, typename Char, typename Enable = void>
+struct range_format_kind
+ : conditional_t<
+ is_range<T, Char>::value, detail::range_format_kind_<T>,
+ std::integral_constant<range_format, range_format::disabled>> {};
+
+template <typename R, typename Char>
+struct formatter<
+ R, Char,
+ enable_if_t<conjunction<bool_constant<range_format_kind<R, Char>::value !=
+ range_format::disabled>
+// Workaround a bug in MSVC 2015 and earlier.
+#if !FMT_MSC_VERSION || FMT_MSC_VERSION >= 1910
+ ,
+ detail::is_formattable_delayed<R, Char>
+#endif
+ >::value>>
+ : detail::range_default_formatter<range_format_kind<R, Char>::value, R,
+ Char> {
+};
+
+template <typename Char, typename... T> struct tuple_join_view : detail::view {
+ const std::tuple<T...>& tuple;
+ basic_string_view<Char> sep;
+
+ tuple_join_view(const std::tuple<T...>& t, basic_string_view<Char> s)
+ : tuple(t), sep{s} {}
+};
+
+// Define FMT_TUPLE_JOIN_SPECIFIERS to enable experimental format specifiers
+// support in tuple_join. It is disabled by default because of issues with
+// the dynamic width and precision.
+#ifndef FMT_TUPLE_JOIN_SPECIFIERS
+# define FMT_TUPLE_JOIN_SPECIFIERS 0
+#endif
+
+template <typename Char, typename... T>
+struct formatter<tuple_join_view<Char, T...>, Char> {
+ template <typename ParseContext>
+ FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+ return do_parse(ctx, std::integral_constant<size_t, sizeof...(T)>());
+ }
+
+ template <typename FormatContext>
+ auto format(const tuple_join_view<Char, T...>& value,
+ FormatContext& ctx) const -> typename FormatContext::iterator {
+ return do_format(value, ctx,
+ std::integral_constant<size_t, sizeof...(T)>());
+ }
+
+ private:
+ std::tuple<formatter<typename std::decay<T>::type, Char>...> formatters_;
+
+ template <typename ParseContext>
+ FMT_CONSTEXPR auto do_parse(ParseContext& ctx,
+ std::integral_constant<size_t, 0>)
+ -> decltype(ctx.begin()) {
+ return ctx.begin();
+ }
+
+ template <typename ParseContext, size_t N>
+ FMT_CONSTEXPR auto do_parse(ParseContext& ctx,
+ std::integral_constant<size_t, N>)
+ -> decltype(ctx.begin()) {
+ auto end = ctx.begin();
+#if FMT_TUPLE_JOIN_SPECIFIERS
+ end = std::get<sizeof...(T) - N>(formatters_).parse(ctx);
+ if (N > 1) {
+ auto end1 = do_parse(ctx, std::integral_constant<size_t, N - 1>());
+ if (end != end1)
+ FMT_THROW(format_error("incompatible format specs for tuple elements"));
+ }
+#endif
+ return end;
+ }
+
+ template <typename FormatContext>
+ auto do_format(const tuple_join_view<Char, T...>&, FormatContext& ctx,
+ std::integral_constant<size_t, 0>) const ->
+ typename FormatContext::iterator {
+ return ctx.out();
+ }
+
+ template <typename FormatContext, size_t N>
+ auto do_format(const tuple_join_view<Char, T...>& value, FormatContext& ctx,
+ std::integral_constant<size_t, N>) const ->
+ typename FormatContext::iterator {
+ auto out = std::get<sizeof...(T) - N>(formatters_)
+ .format(std::get<sizeof...(T) - N>(value.tuple), ctx);
+ if (N > 1) {
+ out = std::copy(value.sep.begin(), value.sep.end(), out);
+ ctx.advance_to(out);
+ return do_format(value, ctx, std::integral_constant<size_t, N - 1>());
+ }
+ return out;
+ }
+};
+
+namespace detail {
+// Check if T has an interface like a container adaptor (e.g. std::stack,
+// std::queue, std::priority_queue).
+template <typename T> class is_container_adaptor_like {
+ template <typename U> static auto check(U* p) -> typename U::container_type;
+ template <typename> static void check(...);
+
+ public:
+ static constexpr const bool value =
+ !std::is_void<decltype(check<T>(nullptr))>::value;
+};
+
+template <typename Container> struct all {
+ const Container& c;
+ auto begin() const -> typename Container::const_iterator { return c.begin(); }
+ auto end() const -> typename Container::const_iterator { return c.end(); }
+};
+} // namespace detail
+
+template <typename T, typename Char>
+struct formatter<T, Char,
+ enable_if_t<detail::is_container_adaptor_like<T>::value>>
+ : formatter<detail::all<typename T::container_type>, Char> {
+ using all = detail::all<typename T::container_type>;
+ template <typename FormatContext>
+ auto format(const T& t, FormatContext& ctx) const -> decltype(ctx.out()) {
+ struct getter : T {
+ static auto get(const T& t) -> all {
+ return {t.*(&getter::c)}; // Access c through the derived class.
+ }
+ };
+ return formatter<all>::format(getter::get(t), ctx);
+ }
+};
+
+FMT_BEGIN_EXPORT
+
+/**
+ \rst
+ Returns an object that formats `tuple` with elements separated by `sep`.
+
+ **Example**::
+
+ std::tuple<int, char> t = {1, 'a'};
+ fmt::print("{}", fmt::join(t, ", "));
+ // Output: "1, a"
+ \endrst
+ */
+template <typename... T>
+FMT_CONSTEXPR auto join(const std::tuple<T...>& tuple, string_view sep)
+ -> tuple_join_view<char, T...> {
+ return {tuple, sep};
+}
+
+template <typename... T>
+FMT_CONSTEXPR auto join(const std::tuple<T...>& tuple,
+ basic_string_view<wchar_t> sep)
+ -> tuple_join_view<wchar_t, T...> {
+ return {tuple, sep};
+}
+
+/**
+ \rst
+ Returns an object that formats `initializer_list` with elements separated by
+ `sep`.
+
+ **Example**::
+
+ fmt::print("{}", fmt::join({1, 2, 3}, ", "));
+ // Output: "1, 2, 3"
+ \endrst
+ */
+template <typename T>
+auto join(std::initializer_list<T> list, string_view sep)
+ -> join_view<const T*, const T*> {
+ return join(std::begin(list), std::end(list), sep);
+}
+
+FMT_END_EXPORT
+FMT_END_NAMESPACE
+
+#endif // FMT_RANGES_H_
diff --git a/contrib/fmt/include/fmt/std.h b/contrib/fmt/include/fmt/std.h
new file mode 100644
index 0000000..4c2a28c
--- /dev/null
+++ b/contrib/fmt/include/fmt/std.h
@@ -0,0 +1,349 @@
+// Formatting library for C++ - formatters for standard library types
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_STD_H_
+#define FMT_STD_H_
+
+#include <cstdlib>
+#include <exception>
+#include <memory>
+#include <thread>
+#include <type_traits>
+#include <typeinfo>
+#include <utility>
+
+#include "ostream.h"
+
+#if FMT_HAS_INCLUDE(<version>)
+# include <version>
+#endif
+// Checking FMT_CPLUSPLUS for warning suppression in MSVC.
+#if FMT_CPLUSPLUS >= 201703L
+# if FMT_HAS_INCLUDE(<filesystem>)
+# include <filesystem>
+# endif
+# if FMT_HAS_INCLUDE(<variant>)
+# include <variant>
+# endif
+# if FMT_HAS_INCLUDE(<optional>)
+# include <optional>
+# endif
+#endif
+
+// GCC 4 does not support FMT_HAS_INCLUDE.
+#if FMT_HAS_INCLUDE(<cxxabi.h>) || defined(__GLIBCXX__)
+# include <cxxabi.h>
+// Android NDK with gabi++ library on some architectures does not implement
+// abi::__cxa_demangle().
+# ifndef __GABIXX_CXXABI_H__
+# define FMT_HAS_ABI_CXA_DEMANGLE
+# endif
+#endif
+
+#ifdef __cpp_lib_filesystem
+FMT_BEGIN_NAMESPACE
+
+namespace detail {
+
+template <typename Char>
+void write_escaped_path(basic_memory_buffer<Char>& quoted,
+ const std::filesystem::path& p) {
+ write_escaped_string<Char>(std::back_inserter(quoted), p.string<Char>());
+}
+# ifdef _WIN32
+template <>
+inline void write_escaped_path<char>(memory_buffer& quoted,
+ const std::filesystem::path& p) {
+ auto buf = basic_memory_buffer<wchar_t>();
+ write_escaped_string<wchar_t>(std::back_inserter(buf), p.native());
+ // Convert UTF-16 to UTF-8.
+ if (!unicode_to_utf8<wchar_t>::convert(quoted, {buf.data(), buf.size()}))
+ FMT_THROW(std::runtime_error("invalid utf16"));
+}
+# endif
+template <>
+inline void write_escaped_path<std::filesystem::path::value_type>(
+ basic_memory_buffer<std::filesystem::path::value_type>& quoted,
+ const std::filesystem::path& p) {
+ write_escaped_string<std::filesystem::path::value_type>(
+ std::back_inserter(quoted), p.native());
+}
+
+} // namespace detail
+
+FMT_MODULE_EXPORT
+template <typename Char>
+struct formatter<std::filesystem::path, Char>
+ : formatter<basic_string_view<Char>> {
+ template <typename ParseContext> FMT_CONSTEXPR auto parse(ParseContext& ctx) {
+ auto out = formatter<basic_string_view<Char>>::parse(ctx);
+ this->set_debug_format(false);
+ return out;
+ }
+ template <typename FormatContext>
+ auto format(const std::filesystem::path& p, FormatContext& ctx) const ->
+ typename FormatContext::iterator {
+ auto quoted = basic_memory_buffer<Char>();
+ detail::write_escaped_path(quoted, p);
+ return formatter<basic_string_view<Char>>::format(
+ basic_string_view<Char>(quoted.data(), quoted.size()), ctx);
+ }
+};
+FMT_END_NAMESPACE
+#endif
+
+FMT_BEGIN_NAMESPACE
+FMT_MODULE_EXPORT
+template <typename Char>
+struct formatter<std::thread::id, Char> : basic_ostream_formatter<Char> {};
+FMT_END_NAMESPACE
+
+#ifdef __cpp_lib_optional
+FMT_BEGIN_NAMESPACE
+FMT_MODULE_EXPORT
+template <typename T, typename Char>
+struct formatter<std::optional<T>, Char,
+ std::enable_if_t<is_formattable<T, Char>::value>> {
+ private:
+ formatter<T, Char> underlying_;
+ static constexpr basic_string_view<Char> optional =
+ detail::string_literal<Char, 'o', 'p', 't', 'i', 'o', 'n', 'a', 'l',
+ '('>{};
+ static constexpr basic_string_view<Char> none =
+ detail::string_literal<Char, 'n', 'o', 'n', 'e'>{};
+
+ template <class U>
+ FMT_CONSTEXPR static auto maybe_set_debug_format(U& u, bool set)
+ -> decltype(u.set_debug_format(set)) {
+ u.set_debug_format(set);
+ }
+
+ template <class U>
+ FMT_CONSTEXPR static void maybe_set_debug_format(U&, ...) {}
+
+ public:
+ template <typename ParseContext> FMT_CONSTEXPR auto parse(ParseContext& ctx) {
+ maybe_set_debug_format(underlying_, true);
+ return underlying_.parse(ctx);
+ }
+
+ template <typename FormatContext>
+ auto format(std::optional<T> const& opt, FormatContext& ctx) const
+ -> decltype(ctx.out()) {
+ if (!opt) return detail::write<Char>(ctx.out(), none);
+
+ auto out = ctx.out();
+ out = detail::write<Char>(out, optional);
+ ctx.advance_to(out);
+ out = underlying_.format(*opt, ctx);
+ return detail::write(out, ')');
+ }
+};
+FMT_END_NAMESPACE
+#endif // __cpp_lib_optional
+
+#ifdef __cpp_lib_variant
+FMT_BEGIN_NAMESPACE
+FMT_MODULE_EXPORT
+template <typename Char> struct formatter<std::monostate, Char> {
+ template <typename ParseContext>
+ FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+ return ctx.begin();
+ }
+
+ template <typename FormatContext>
+ auto format(const std::monostate&, FormatContext& ctx) const
+ -> decltype(ctx.out()) {
+ auto out = ctx.out();
+ out = detail::write<Char>(out, "monostate");
+ return out;
+ }
+};
+
+namespace detail {
+
+template <typename T>
+using variant_index_sequence =
+ std::make_index_sequence<std::variant_size<T>::value>;
+
+template <typename> struct is_variant_like_ : std::false_type {};
+template <typename... Types>
+struct is_variant_like_<std::variant<Types...>> : std::true_type {};
+
+// formattable element check.
+template <typename T, typename C> class is_variant_formattable_ {
+ template <std::size_t... Is>
+ static std::conjunction<
+ is_formattable<std::variant_alternative_t<Is, T>, C>...>
+ check(std::index_sequence<Is...>);
+
+ public:
+ static constexpr const bool value =
+ decltype(check(variant_index_sequence<T>{}))::value;
+};
+
+template <typename Char, typename OutputIt, typename T>
+auto write_variant_alternative(OutputIt out, const T& v) -> OutputIt {
+ if constexpr (is_string<T>::value)
+ return write_escaped_string<Char>(out, detail::to_string_view(v));
+ else if constexpr (std::is_same_v<T, Char>)
+ return write_escaped_char(out, v);
+ else
+ return write<Char>(out, v);
+}
+
+} // namespace detail
+template <typename T> struct is_variant_like {
+ static constexpr const bool value = detail::is_variant_like_<T>::value;
+};
+
+template <typename T, typename C> struct is_variant_formattable {
+ static constexpr const bool value =
+ detail::is_variant_formattable_<T, C>::value;
+};
+
+FMT_MODULE_EXPORT
+template <typename Variant, typename Char>
+struct formatter<
+ Variant, Char,
+ std::enable_if_t<std::conjunction_v<
+ is_variant_like<Variant>, is_variant_formattable<Variant, Char>>>> {
+ template <typename ParseContext>
+ FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+ return ctx.begin();
+ }
+
+ template <typename FormatContext>
+ auto format(const Variant& value, FormatContext& ctx) const
+ -> decltype(ctx.out()) {
+ auto out = ctx.out();
+
+ out = detail::write<Char>(out, "variant(");
+ try {
+ std::visit(
+ [&](const auto& v) {
+ out = detail::write_variant_alternative<Char>(out, v);
+ },
+ value);
+ } catch (const std::bad_variant_access&) {
+ detail::write<Char>(out, "valueless by exception");
+ }
+ *out++ = ')';
+ return out;
+ }
+};
+FMT_END_NAMESPACE
+#endif // __cpp_lib_variant
+
+FMT_BEGIN_NAMESPACE
+FMT_MODULE_EXPORT
+template <typename Char> struct formatter<std::error_code, Char> {
+ template <typename ParseContext>
+ FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+ return ctx.begin();
+ }
+
+ template <typename FormatContext>
+ FMT_CONSTEXPR auto format(const std::error_code& ec, FormatContext& ctx) const
+ -> decltype(ctx.out()) {
+ auto out = ctx.out();
+ out = detail::write_bytes(out, ec.category().name(), format_specs<Char>());
+ out = detail::write<Char>(out, Char(':'));
+ out = detail::write<Char>(out, ec.value());
+ return out;
+ }
+};
+
+FMT_MODULE_EXPORT
+template <typename T, typename Char>
+struct formatter<
+ T, Char,
+ typename std::enable_if<std::is_base_of<std::exception, T>::value>::type> {
+ private:
+ bool with_typename_ = false;
+
+ public:
+ FMT_CONSTEXPR auto parse(basic_format_parse_context<Char>& ctx)
+ -> decltype(ctx.begin()) {
+ auto it = ctx.begin();
+ auto end = ctx.end();
+ if (it == end || *it == '}') return it;
+ if (*it == 't') {
+ ++it;
+ with_typename_ = true;
+ }
+ return it;
+ }
+
+ template <typename OutputIt>
+ auto format(const std::exception& ex,
+ basic_format_context<OutputIt, Char>& ctx) const -> OutputIt {
+ format_specs<Char> spec;
+ auto out = ctx.out();
+ if (!with_typename_)
+ return detail::write_bytes(out, string_view(ex.what()), spec);
+
+ const std::type_info& ti = typeid(ex);
+#ifdef FMT_HAS_ABI_CXA_DEMANGLE
+ int status = 0;
+ std::size_t size = 0;
+ std::unique_ptr<char, decltype(&std::free)> demangled_name_ptr(
+ abi::__cxa_demangle(ti.name(), nullptr, &size, &status), &std::free);
+
+ string_view demangled_name_view;
+ if (demangled_name_ptr) {
+ demangled_name_view = demangled_name_ptr.get();
+
+ // Normalization of stdlib inline namespace names.
+ // libc++ inline namespaces.
+ // std::__1::* -> std::*
+ // std::__1::__fs::* -> std::*
+ // libstdc++ inline namespaces.
+ // std::__cxx11::* -> std::*
+ // std::filesystem::__cxx11::* -> std::filesystem::*
+ if (demangled_name_view.starts_with("std::")) {
+ char* begin = demangled_name_ptr.get();
+ char* to = begin + 5; // std::
+ for (char *from = to, *end = begin + demangled_name_view.size();
+ from < end;) {
+ // This is safe, because demangled_name is NUL-terminated.
+ if (from[0] == '_' && from[1] == '_') {
+ char* next = from + 1;
+ while (next < end && *next != ':') next++;
+ if (next[0] == ':' && next[1] == ':') {
+ from = next + 2;
+ continue;
+ }
+ }
+ *to++ = *from++;
+ }
+ demangled_name_view = {begin, detail::to_unsigned(to - begin)};
+ }
+ } else {
+ demangled_name_view = string_view(ti.name());
+ }
+ out = detail::write_bytes(out, demangled_name_view, spec);
+#elif FMT_MSC_VERSION
+ string_view demangled_name_view(ti.name());
+ if (demangled_name_view.starts_with("class "))
+ demangled_name_view.remove_prefix(6);
+ else if (demangled_name_view.starts_with("struct "))
+ demangled_name_view.remove_prefix(7);
+ out = detail::write_bytes(out, demangled_name_view, spec);
+#else
+ out = detail::write_bytes(out, string_view(ti.name()), spec);
+#endif
+ out = detail::write<Char>(out, Char(':'));
+ out = detail::write<Char>(out, Char(' '));
+ out = detail::write_bytes(out, string_view(ex.what()), spec);
+
+ return out;
+ }
+};
+FMT_END_NAMESPACE
+
+#endif // FMT_STD_H_
diff --git a/contrib/fmt/include/fmt/xchar.h b/contrib/fmt/include/fmt/xchar.h
new file mode 100644
index 0000000..4b87f8d
--- /dev/null
+++ b/contrib/fmt/include/fmt/xchar.h
@@ -0,0 +1,259 @@
+// Formatting library for C++ - optional wchar_t and exotic character support
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_XCHAR_H_
+#define FMT_XCHAR_H_
+
+#include <cwchar>
+
+#include "format.h"
+
+#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
+# include <locale>
+#endif
+
+FMT_BEGIN_NAMESPACE
+namespace detail {
+
+template <typename T>
+using is_exotic_char = bool_constant<!std::is_same<T, char>::value>;
+
+inline auto write_loc(std::back_insert_iterator<detail::buffer<wchar_t>> out,
+ loc_value value, const format_specs<wchar_t>& specs,
+ locale_ref loc) -> bool {
+#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
+ auto& numpunct =
+ std::use_facet<std::numpunct<wchar_t>>(loc.get<std::locale>());
+ auto separator = std::wstring();
+ auto grouping = numpunct.grouping();
+ if (!grouping.empty()) separator = std::wstring(1, numpunct.thousands_sep());
+ return value.visit(loc_writer<wchar_t>{out, specs, separator, grouping, {}});
+#endif
+ return false;
+}
+} // namespace detail
+
+FMT_BEGIN_EXPORT
+
+using wstring_view = basic_string_view<wchar_t>;
+using wformat_parse_context = basic_format_parse_context<wchar_t>;
+using wformat_context = buffer_context<wchar_t>;
+using wformat_args = basic_format_args<wformat_context>;
+using wmemory_buffer = basic_memory_buffer<wchar_t>;
+
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
+// Workaround broken conversion on older gcc.
+template <typename... Args> using wformat_string = wstring_view;
+inline auto runtime(wstring_view s) -> wstring_view { return s; }
+#else
+template <typename... Args>
+using wformat_string = basic_format_string<wchar_t, type_identity_t<Args>...>;
+inline auto runtime(wstring_view s) -> runtime_format_string<wchar_t> {
+ return {{s}};
+}
+#endif
+
+template <> struct is_char<wchar_t> : std::true_type {};
+template <> struct is_char<detail::char8_type> : std::true_type {};
+template <> struct is_char<char16_t> : std::true_type {};
+template <> struct is_char<char32_t> : std::true_type {};
+
+template <typename... Args>
+constexpr format_arg_store<wformat_context, Args...> make_wformat_args(
+ const Args&... args) {
+ return {args...};
+}
+
+inline namespace literals {
+#if FMT_USE_USER_DEFINED_LITERALS && !FMT_USE_NONTYPE_TEMPLATE_ARGS
+constexpr detail::udl_arg<wchar_t> operator"" _a(const wchar_t* s, size_t) {
+ return {s};
+}
+#endif
+} // namespace literals
+
+template <typename It, typename Sentinel>
+auto join(It begin, Sentinel end, wstring_view sep)
+ -> join_view<It, Sentinel, wchar_t> {
+ return {begin, end, sep};
+}
+
+template <typename Range>
+auto join(Range&& range, wstring_view sep)
+ -> join_view<detail::iterator_t<Range>, detail::sentinel_t<Range>,
+ wchar_t> {
+ return join(std::begin(range), std::end(range), sep);
+}
+
+template <typename T>
+auto join(std::initializer_list<T> list, wstring_view sep)
+ -> join_view<const T*, const T*, wchar_t> {
+ return join(std::begin(list), std::end(list), sep);
+}
+
+template <typename Char, FMT_ENABLE_IF(!std::is_same<Char, char>::value)>
+auto vformat(basic_string_view<Char> format_str,
+ basic_format_args<buffer_context<type_identity_t<Char>>> args)
+ -> std::basic_string<Char> {
+ basic_memory_buffer<Char> buffer;
+ detail::vformat_to(buffer, format_str, args);
+ return to_string(buffer);
+}
+
+template <typename... T>
+auto format(wformat_string<T...> fmt, T&&... args) -> std::wstring {
+ return vformat(fmt::wstring_view(fmt), fmt::make_wformat_args(args...));
+}
+
+// Pass char_t as a default template parameter instead of using
+// std::basic_string<char_t<S>> to reduce the symbol size.
+template <typename S, typename... Args, typename Char = char_t<S>,
+ FMT_ENABLE_IF(!std::is_same<Char, char>::value &&
+ !std::is_same<Char, wchar_t>::value)>
+auto format(const S& format_str, Args&&... args) -> std::basic_string<Char> {
+ return vformat(detail::to_string_view(format_str),
+ fmt::make_format_args<buffer_context<Char>>(args...));
+}
+
+template <typename Locale, typename S, typename Char = char_t<S>,
+ FMT_ENABLE_IF(detail::is_locale<Locale>::value&&
+ detail::is_exotic_char<Char>::value)>
+inline auto vformat(
+ const Locale& loc, const S& format_str,
+ basic_format_args<buffer_context<type_identity_t<Char>>> args)
+ -> std::basic_string<Char> {
+ return detail::vformat(loc, detail::to_string_view(format_str), args);
+}
+
+template <typename Locale, typename S, typename... Args,
+ typename Char = char_t<S>,
+ FMT_ENABLE_IF(detail::is_locale<Locale>::value&&
+ detail::is_exotic_char<Char>::value)>
+inline auto format(const Locale& loc, const S& format_str, Args&&... args)
+ -> std::basic_string<Char> {
+ return detail::vformat(loc, detail::to_string_view(format_str),
+ fmt::make_format_args<buffer_context<Char>>(args...));
+}
+
+template <typename OutputIt, typename S, typename Char = char_t<S>,
+ FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
+ detail::is_exotic_char<Char>::value)>
+auto vformat_to(OutputIt out, const S& format_str,
+ basic_format_args<buffer_context<type_identity_t<Char>>> args)
+ -> OutputIt {
+ auto&& buf = detail::get_buffer<Char>(out);
+ detail::vformat_to(buf, detail::to_string_view(format_str), args);
+ return detail::get_iterator(buf, out);
+}
+
+template <typename OutputIt, typename S, typename... Args,
+ typename Char = char_t<S>,
+ FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
+ detail::is_exotic_char<Char>::value)>
+inline auto format_to(OutputIt out, const S& fmt, Args&&... args) -> OutputIt {
+ return vformat_to(out, detail::to_string_view(fmt),
+ fmt::make_format_args<buffer_context<Char>>(args...));
+}
+
+template <typename Locale, typename S, typename OutputIt, typename... Args,
+ typename Char = char_t<S>,
+ FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
+ detail::is_locale<Locale>::value&&
+ detail::is_exotic_char<Char>::value)>
+inline auto vformat_to(
+ OutputIt out, const Locale& loc, const S& format_str,
+ basic_format_args<buffer_context<type_identity_t<Char>>> args) -> OutputIt {
+ auto&& buf = detail::get_buffer<Char>(out);
+ vformat_to(buf, detail::to_string_view(format_str), args,
+ detail::locale_ref(loc));
+ return detail::get_iterator(buf, out);
+}
+
+template <
+ typename OutputIt, typename Locale, typename S, typename... Args,
+ typename Char = char_t<S>,
+ bool enable = detail::is_output_iterator<OutputIt, Char>::value&&
+ detail::is_locale<Locale>::value&& detail::is_exotic_char<Char>::value>
+inline auto format_to(OutputIt out, const Locale& loc, const S& format_str,
+ Args&&... args) ->
+ typename std::enable_if<enable, OutputIt>::type {
+ return vformat_to(out, loc, detail::to_string_view(format_str),
+ fmt::make_format_args<buffer_context<Char>>(args...));
+}
+
+template <typename OutputIt, typename Char, typename... Args,
+ FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
+ detail::is_exotic_char<Char>::value)>
+inline auto vformat_to_n(
+ OutputIt out, size_t n, basic_string_view<Char> format_str,
+ basic_format_args<buffer_context<type_identity_t<Char>>> args)
+ -> format_to_n_result<OutputIt> {
+ detail::iterator_buffer<OutputIt, Char, detail::fixed_buffer_traits> buf(out,
+ n);
+ detail::vformat_to(buf, format_str, args);
+ return {buf.out(), buf.count()};
+}
+
+template <typename OutputIt, typename S, typename... Args,
+ typename Char = char_t<S>,
+ FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
+ detail::is_exotic_char<Char>::value)>
+inline auto format_to_n(OutputIt out, size_t n, const S& fmt,
+ const Args&... args) -> format_to_n_result<OutputIt> {
+ return vformat_to_n(out, n, detail::to_string_view(fmt),
+ fmt::make_format_args<buffer_context<Char>>(args...));
+}
+
+template <typename S, typename... Args, typename Char = char_t<S>,
+ FMT_ENABLE_IF(detail::is_exotic_char<Char>::value)>
+inline auto formatted_size(const S& fmt, Args&&... args) -> size_t {
+ detail::counting_buffer<Char> buf;
+ detail::vformat_to(buf, detail::to_string_view(fmt),
+ fmt::make_format_args<buffer_context<Char>>(args...));
+ return buf.count();
+}
+
+inline void vprint(std::FILE* f, wstring_view fmt, wformat_args args) {
+ wmemory_buffer buffer;
+ detail::vformat_to(buffer, fmt, args);
+ buffer.push_back(L'\0');
+ if (std::fputws(buffer.data(), f) == -1)
+ FMT_THROW(system_error(errno, FMT_STRING("cannot write to file")));
+}
+
+inline void vprint(wstring_view fmt, wformat_args args) {
+ vprint(stdout, fmt, args);
+}
+
+template <typename... T>
+void print(std::FILE* f, wformat_string<T...> fmt, T&&... args) {
+ return vprint(f, wstring_view(fmt), fmt::make_wformat_args(args...));
+}
+
+template <typename... T> void print(wformat_string<T...> fmt, T&&... args) {
+ return vprint(wstring_view(fmt), fmt::make_wformat_args(args...));
+}
+
+template <typename... T>
+void println(std::FILE* f, wformat_string<T...> fmt, T&&... args) {
+ return print(f, L"{}\n", fmt::format(fmt, std::forward<T>(args)...));
+}
+
+template <typename... T> void println(wformat_string<T...> fmt, T&&... args) {
+ return print(L"{}\n", fmt::format(fmt, std::forward<T>(args)...));
+}
+
+/**
+ Converts *value* to ``std::wstring`` using the default format for type *T*.
+ */
+template <typename T> inline auto to_wstring(const T& value) -> std::wstring {
+ return format(FMT_STRING(L"{}"), value);
+}
+FMT_END_EXPORT
+FMT_END_NAMESPACE
+
+#endif // FMT_XCHAR_H_
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