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Diffstat (limited to 'src/fmt/test/format-test.cc')
| -rw-r--r-- | src/fmt/test/format-test.cc | 2311 |
1 files changed, 2311 insertions, 0 deletions
diff --git a/src/fmt/test/format-test.cc b/src/fmt/test/format-test.cc new file mode 100644 index 000000000..f3bdb4649 --- /dev/null +++ b/src/fmt/test/format-test.cc @@ -0,0 +1,2311 @@ +// Formatting library for C++ - formatting library tests +// +// Copyright (c) 2012 - present, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +// Check if fmt/format.h compiles with windows.h included before it. +#ifdef _WIN32 +# include <windows.h> +#endif +// clang-format off +#include "fmt/format.h" +// clang-format on + +#include <stdint.h> // uint32_t + +#include <climits> // INT_MAX +#include <cmath> // std::signbit +#include <cstring> // std::strlen +#include <iterator> // std::back_inserter +#include <list> // std::list +#include <memory> // std::unique_ptr +#include <type_traits> // std::is_default_constructible + +#include "gtest-extra.h" +#include "mock-allocator.h" +#include "util.h" + +using fmt::basic_memory_buffer; +using fmt::format_error; +using fmt::memory_buffer; +using fmt::runtime; +using fmt::string_view; +using fmt::detail::max_value; +using fmt::detail::uint128_fallback; + +using testing::Return; +using testing::StrictMock; + +enum { buffer_size = 256 }; + +TEST(uint128_test, ctor) { + auto n = uint128_fallback(); + EXPECT_EQ(n, 0); + n = uint128_fallback(42); + EXPECT_EQ(n, 42); + EXPECT_EQ(static_cast<uint64_t>(n), 42); +} + +TEST(uint128_test, shift) { + auto n = uint128_fallback(42); + n = n << 64; + EXPECT_EQ(static_cast<uint64_t>(n), 0); + n = n >> 64; + EXPECT_EQ(static_cast<uint64_t>(n), 42); + n = n << 62; + EXPECT_EQ(static_cast<uint64_t>(n >> 64), 0xa); + EXPECT_EQ(static_cast<uint64_t>(n), 0x8000000000000000); + n = n >> 62; + EXPECT_EQ(static_cast<uint64_t>(n), 42); + EXPECT_EQ(uint128_fallback(1) << 112, uint128_fallback(0x1000000000000, 0)); + EXPECT_EQ(uint128_fallback(0x1000000000000, 0) >> 112, uint128_fallback(1)); +} + +TEST(uint128_test, minus) { + auto n = uint128_fallback(42); + EXPECT_EQ(n - 2, 40); +} + +TEST(uint128_test, plus_assign) { + auto n = uint128_fallback(32); + n += uint128_fallback(10); + EXPECT_EQ(n, 42); + n = uint128_fallback(max_value<uint64_t>()); + n += uint128_fallback(1); + EXPECT_EQ(n, uint128_fallback(1) << 64); +} + +TEST(uint128_test, multiply) { + auto n = uint128_fallback(2251799813685247); + n = n * 3611864890; + EXPECT_EQ(static_cast<uint64_t>(n >> 64), 440901); +} + +template <typename Float> void check_isfinite() { + using fmt::detail::isfinite; + EXPECT_TRUE(isfinite(Float(0.0))); + EXPECT_TRUE(isfinite(Float(42.0))); + EXPECT_TRUE(isfinite(Float(-42.0))); + EXPECT_TRUE(isfinite(Float(fmt::detail::max_value<double>()))); + // Use double because std::numeric_limits is broken for __float128. + using limits = std::numeric_limits<double>; + FMT_CONSTEXPR20 auto result = isfinite(Float(limits::infinity())); + EXPECT_FALSE(result); + EXPECT_FALSE(isfinite(Float(limits::infinity()))); + EXPECT_FALSE(isfinite(Float(-limits::infinity()))); + EXPECT_FALSE(isfinite(Float(limits::quiet_NaN()))); + EXPECT_FALSE(isfinite(Float(-limits::quiet_NaN()))); +} + +TEST(float_test, isfinite) { + check_isfinite<double>(); +#if FMT_USE_FLOAT128 + check_isfinite<fmt::detail::float128>(); +#endif +} + +template <typename Float> void check_isnan() { + using fmt::detail::isnan; + EXPECT_FALSE(isnan(Float(0.0))); + EXPECT_FALSE(isnan(Float(42.0))); + EXPECT_FALSE(isnan(Float(-42.0))); + EXPECT_FALSE(isnan(Float(fmt::detail::max_value<double>()))); + // Use double because std::numeric_limits is broken for __float128. + using limits = std::numeric_limits<double>; + EXPECT_FALSE(isnan(Float(limits::infinity()))); + EXPECT_FALSE(isnan(Float(-limits::infinity()))); + EXPECT_TRUE(isnan(Float(limits::quiet_NaN()))); + EXPECT_TRUE(isnan(Float(-limits::quiet_NaN()))); +} + +TEST(float_test, isnan) { + check_isnan<double>(); +#if FMT_USE_FLOAT128 + check_isnan<fmt::detail::float128>(); +#endif +} + +struct uint32_pair { + uint32_t u[2]; +}; + +TEST(util_test, bit_cast) { + auto s = fmt::detail::bit_cast<uint32_pair>(uint64_t{42}); + EXPECT_EQ(fmt::detail::bit_cast<uint64_t>(s), 42ull); + s = fmt::detail::bit_cast<uint32_pair>(~uint64_t{0}); + EXPECT_EQ(fmt::detail::bit_cast<uint64_t>(s), ~0ull); +} + +// Increment a number in a string. +void increment(char* s) { + for (int i = static_cast<int>(std::strlen(s)) - 1; i >= 0; --i) { + if (s[i] != '9') { + ++s[i]; + break; + } + s[i] = '0'; + } +} + +TEST(util_test, increment) { + char s[10] = "123"; + increment(s); + EXPECT_STREQ("124", s); + s[2] = '8'; + increment(s); + EXPECT_STREQ("129", s); + increment(s); + EXPECT_STREQ("130", s); + s[1] = s[2] = '9'; + increment(s); + EXPECT_STREQ("200", s); +} + +TEST(util_test, parse_nonnegative_int) { + auto s = fmt::string_view("10000000000"); + auto begin = s.begin(), end = s.end(); + EXPECT_EQ(fmt::detail::parse_nonnegative_int(begin, end, -1), -1); + s = "2147483649"; + begin = s.begin(); + end = s.end(); + EXPECT_EQ(fmt::detail::parse_nonnegative_int(begin, end, -1), -1); +} + +TEST(util_test, utf8_to_utf16) { + auto u = fmt::detail::utf8_to_utf16("лошадка"); + EXPECT_EQ(L"\x043B\x043E\x0448\x0430\x0434\x043A\x0430", u.str()); + EXPECT_EQ(7, u.size()); + // U+10437 { DESERET SMALL LETTER YEE } + EXPECT_EQ(L"\xD801\xDC37", fmt::detail::utf8_to_utf16("𐐷").str()); + EXPECT_THROW_MSG(fmt::detail::utf8_to_utf16("\xc3\x28"), std::runtime_error, + "invalid utf8"); + EXPECT_THROW_MSG(fmt::detail::utf8_to_utf16(fmt::string_view("л", 1)), + std::runtime_error, "invalid utf8"); + EXPECT_EQ(L"123456", fmt::detail::utf8_to_utf16("123456").str()); +} + +TEST(util_test, utf8_to_utf16_empty_string) { + auto s = std::string(); + auto u = fmt::detail::utf8_to_utf16(s.c_str()); + EXPECT_EQ(L"", u.str()); + EXPECT_EQ(s.size(), u.size()); +} + +TEST(util_test, allocator_ref) { + using test_allocator_ref = allocator_ref<mock_allocator<int>>; + auto check_forwarding = [](mock_allocator<int>& alloc, + test_allocator_ref& ref) { + int mem; + // Check if value_type is properly defined. + allocator_ref<mock_allocator<int>>::value_type* ptr = &mem; + // Check forwarding. + EXPECT_CALL(alloc, allocate(42)).WillOnce(Return(ptr)); + ref.allocate(42); + EXPECT_CALL(alloc, deallocate(ptr, 42)); + ref.deallocate(ptr, 42); + }; + + StrictMock<mock_allocator<int>> alloc; + auto ref = test_allocator_ref(&alloc); + // Check if allocator_ref forwards to the underlying allocator. + check_forwarding(alloc, ref); + test_allocator_ref ref2(ref); + check_forwarding(alloc, ref2); + test_allocator_ref ref3; + EXPECT_EQ(nullptr, ref3.get()); + ref3 = ref; + check_forwarding(alloc, ref3); +} + +TEST(util_test, format_system_error) { + fmt::memory_buffer message; + fmt::format_system_error(message, EDOM, "test"); + auto ec = std::error_code(EDOM, std::generic_category()); + EXPECT_EQ(to_string(message), std::system_error(ec, "test").what()); + message = fmt::memory_buffer(); + + // Check if std::allocator throws on allocating max size_t / 2 chars. + size_t max_size = max_value<size_t>() / 2; + bool throws_on_alloc = false; + try { + auto alloc = std::allocator<char>(); + alloc.deallocate(alloc.allocate(max_size), max_size); + } catch (const std::bad_alloc&) { + throws_on_alloc = true; + } + if (!throws_on_alloc) { + fmt::print("warning: std::allocator allocates {} chars\n", max_size); + return; + } +} + +TEST(util_test, system_error) { + auto test_error = fmt::system_error(EDOM, "test"); + auto ec = std::error_code(EDOM, std::generic_category()); + EXPECT_STREQ(test_error.what(), std::system_error(ec, "test").what()); + EXPECT_EQ(test_error.code(), ec); + + auto error = std::system_error(std::error_code()); + try { + throw fmt::system_error(EDOM, "test {}", "error"); + } catch (const std::system_error& e) { + error = e; + } + fmt::memory_buffer message; + fmt::format_system_error(message, EDOM, "test error"); + EXPECT_EQ(error.what(), to_string(message)); + EXPECT_EQ(error.code(), std::error_code(EDOM, std::generic_category())); +} + +TEST(util_test, report_system_error) { + fmt::memory_buffer out; + fmt::format_system_error(out, EDOM, "test error"); + out.push_back('\n'); + EXPECT_WRITE(stderr, fmt::report_system_error(EDOM, "test error"), + to_string(out)); +} + +TEST(memory_buffer_test, ctor) { + basic_memory_buffer<char, 123> buffer; + EXPECT_EQ(static_cast<size_t>(0), buffer.size()); + EXPECT_EQ(123u, buffer.capacity()); +} + +using std_allocator = allocator_ref<std::allocator<char>>; + +TEST(memory_buffer_test, move_ctor_inline_buffer) { + auto check_move_buffer = + [](const char* str, basic_memory_buffer<char, 5, std_allocator>& buffer) { + std::allocator<char>* alloc = buffer.get_allocator().get(); + basic_memory_buffer<char, 5, std_allocator> buffer2(std::move(buffer)); + // Move shouldn't destroy the inline content of the first buffer. + EXPECT_EQ(str, std::string(&buffer[0], buffer.size())); + EXPECT_EQ(str, std::string(&buffer2[0], buffer2.size())); + EXPECT_EQ(5u, buffer2.capacity()); + // Move should transfer allocator. + EXPECT_EQ(nullptr, buffer.get_allocator().get()); + EXPECT_EQ(alloc, buffer2.get_allocator().get()); + }; + + auto alloc = std::allocator<char>(); + basic_memory_buffer<char, 5, std_allocator> buffer((std_allocator(&alloc))); + const char test[] = "test"; + buffer.append(string_view(test, 4)); + check_move_buffer("test", buffer); + // Adding one more character fills the inline buffer, but doesn't cause + // dynamic allocation. + buffer.push_back('a'); + check_move_buffer("testa", buffer); +} + +TEST(memory_buffer_test, move_ctor_dynamic_buffer) { + auto alloc = std::allocator<char>(); + basic_memory_buffer<char, 4, std_allocator> buffer((std_allocator(&alloc))); + const char test[] = "test"; + buffer.append(test, test + 4); + const char* inline_buffer_ptr = &buffer[0]; + // Adding one more character causes the content to move from the inline to + // a dynamically allocated buffer. + buffer.push_back('a'); + basic_memory_buffer<char, 4, std_allocator> buffer2(std::move(buffer)); + // Move should rip the guts of the first buffer. + EXPECT_EQ(&buffer[0], inline_buffer_ptr); + EXPECT_EQ(buffer.size(), 0); + EXPECT_EQ(std::string(&buffer2[0], buffer2.size()), "testa"); + EXPECT_GT(buffer2.capacity(), 4u); +} + +void check_move_assign_buffer(const char* str, + basic_memory_buffer<char, 5>& buffer) { + basic_memory_buffer<char, 5> buffer2; + buffer2 = std::move(buffer); + // Move shouldn't destroy the inline content of the first buffer. + EXPECT_EQ(str, std::string(&buffer[0], buffer.size())); + EXPECT_EQ(str, std::string(&buffer2[0], buffer2.size())); + EXPECT_EQ(5u, buffer2.capacity()); +} + +TEST(memory_buffer_test, move_assignment) { + basic_memory_buffer<char, 5> buffer; + const char test[] = "test"; + buffer.append(test, test + 4); + check_move_assign_buffer("test", buffer); + // Adding one more character fills the inline buffer, but doesn't cause + // dynamic allocation. + buffer.push_back('a'); + check_move_assign_buffer("testa", buffer); + const char* inline_buffer_ptr = &buffer[0]; + // Adding one more character causes the content to move from the inline to + // a dynamically allocated buffer. + buffer.push_back('b'); + basic_memory_buffer<char, 5> buffer2; + buffer2 = std::move(buffer); + // Move should rip the guts of the first buffer. + EXPECT_EQ(inline_buffer_ptr, &buffer[0]); + EXPECT_EQ("testab", std::string(&buffer2[0], buffer2.size())); + EXPECT_GT(buffer2.capacity(), 5u); +} + +TEST(memory_buffer_test, grow) { + typedef allocator_ref<mock_allocator<int>> Allocator; + mock_allocator<int> alloc; + basic_memory_buffer<int, 10, Allocator> buffer((Allocator(&alloc))); + buffer.resize(7); + using fmt::detail::to_unsigned; + for (int i = 0; i < 7; ++i) buffer[to_unsigned(i)] = i * i; + EXPECT_EQ(10u, buffer.capacity()); + int mem[20]; + mem[7] = 0xdead; + EXPECT_CALL(alloc, allocate(20)).WillOnce(Return(mem)); + buffer.try_reserve(20); + EXPECT_EQ(20u, buffer.capacity()); + // Check if size elements have been copied + for (int i = 0; i < 7; ++i) EXPECT_EQ(i * i, buffer[to_unsigned(i)]); + // and no more than that. + EXPECT_EQ(0xdead, buffer[7]); + EXPECT_CALL(alloc, deallocate(mem, 20)); +} + +TEST(memory_buffer_test, allocator) { + using test_allocator = allocator_ref<mock_allocator<char>>; + basic_memory_buffer<char, 10, test_allocator> buffer; + EXPECT_EQ(nullptr, buffer.get_allocator().get()); + StrictMock<mock_allocator<char>> alloc; + char mem; + { + basic_memory_buffer<char, 10, test_allocator> buffer2( + (test_allocator(&alloc))); + EXPECT_EQ(&alloc, buffer2.get_allocator().get()); + size_t size = 2 * fmt::inline_buffer_size; + EXPECT_CALL(alloc, allocate(size)).WillOnce(Return(&mem)); + buffer2.reserve(size); + EXPECT_CALL(alloc, deallocate(&mem, size)); + } +} + +TEST(memory_buffer_test, exception_in_deallocate) { + using test_allocator = allocator_ref<mock_allocator<char>>; + StrictMock<mock_allocator<char>> alloc; + basic_memory_buffer<char, 10, test_allocator> buffer( + (test_allocator(&alloc))); + size_t size = 2 * fmt::inline_buffer_size; + auto mem = std::vector<char>(size); + { + EXPECT_CALL(alloc, allocate(size)).WillOnce(Return(&mem[0])); + buffer.resize(size); + std::fill(&buffer[0], &buffer[0] + size, 'x'); + } + auto mem2 = std::vector<char>(2 * size); + { + EXPECT_CALL(alloc, allocate(2 * size)).WillOnce(Return(&mem2[0])); + auto e = std::exception(); + EXPECT_CALL(alloc, deallocate(&mem[0], size)).WillOnce(testing::Throw(e)); + EXPECT_THROW(buffer.reserve(2 * size), std::exception); + EXPECT_EQ(&mem2[0], &buffer[0]); + // Check that the data has been copied. + for (size_t i = 0; i < size; ++i) EXPECT_EQ('x', buffer[i]); + } + EXPECT_CALL(alloc, deallocate(&mem2[0], 2 * size)); +} + +template <typename Allocator, size_t MaxSize> +class max_size_allocator : public Allocator { + public: + using typename Allocator::value_type; + size_t max_size() const noexcept { return MaxSize; } + value_type* allocate(size_t n) { + if (n > max_size()) { + throw std::length_error("size > max_size"); + } + return std::allocator_traits<Allocator>::allocate( + *static_cast<Allocator*>(this), n); + } + void deallocate(value_type* p, size_t n) { + std::allocator_traits<Allocator>::deallocate(*static_cast<Allocator*>(this), + p, n); + } +}; + +TEST(memory_buffer_test, max_size_allocator) { + // 160 = 128 + 32 + using test_allocator = max_size_allocator<std::allocator<char>, 160>; + basic_memory_buffer<char, 10, test_allocator> buffer; + buffer.resize(128); + // new_capacity = 128 + 128/2 = 192 > 160 + buffer.resize(160); // Shouldn't throw. +} + +TEST(memory_buffer_test, max_size_allocator_overflow) { + using test_allocator = max_size_allocator<std::allocator<char>, 160>; + basic_memory_buffer<char, 10, test_allocator> buffer; + EXPECT_THROW(buffer.resize(161), std::exception); +} + +TEST(format_test, escape) { + EXPECT_EQ("{", fmt::format("{{")); + EXPECT_EQ("before {", fmt::format("before {{")); + EXPECT_EQ("{ after", fmt::format("{{ after")); + EXPECT_EQ("before { after", fmt::format("before {{ after")); + + EXPECT_EQ("}", fmt::format("}}")); + EXPECT_EQ("before }", fmt::format("before }}")); + EXPECT_EQ("} after", fmt::format("}} after")); + EXPECT_EQ("before } after", fmt::format("before }} after")); + + EXPECT_EQ("{}", fmt::format("{{}}")); + EXPECT_EQ("{42}", fmt::format("{{{0}}}", 42)); +} + +TEST(format_test, unmatched_braces) { + EXPECT_THROW_MSG((void)fmt::format(runtime("{")), format_error, + "invalid format string"); + EXPECT_THROW_MSG((void)fmt::format(runtime("}")), format_error, + "unmatched '}' in format string"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0{}")), format_error, + "invalid format string"); +} + +TEST(format_test, no_args) { EXPECT_EQ("test", fmt::format("test")); } + +TEST(format_test, args_in_different_positions) { + EXPECT_EQ("42", fmt::format("{0}", 42)); + EXPECT_EQ("before 42", fmt::format("before {0}", 42)); + EXPECT_EQ("42 after", fmt::format("{0} after", 42)); + EXPECT_EQ("before 42 after", fmt::format("before {0} after", 42)); + EXPECT_EQ("answer = 42", fmt::format("{0} = {1}", "answer", 42)); + EXPECT_EQ("42 is the answer", fmt::format("{1} is the {0}", "answer", 42)); + EXPECT_EQ("abracadabra", fmt::format("{0}{1}{0}", "abra", "cad")); +} + +TEST(format_test, arg_errors) { + EXPECT_THROW_MSG((void)fmt::format(runtime("{")), format_error, + "invalid format string"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{?}")), format_error, + "invalid format string"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0")), format_error, + "invalid format string"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0}")), format_error, + "argument not found"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{00}"), 42), format_error, + "invalid format string"); + + char format_str[buffer_size]; + safe_sprintf(format_str, "{%u", INT_MAX); + EXPECT_THROW_MSG((void)fmt::format(runtime(format_str)), format_error, + "invalid format string"); + safe_sprintf(format_str, "{%u}", INT_MAX); + EXPECT_THROW_MSG((void)fmt::format(runtime(format_str)), format_error, + "argument not found"); + + safe_sprintf(format_str, "{%u", INT_MAX + 1u); + EXPECT_THROW_MSG((void)fmt::format(runtime(format_str)), format_error, + "invalid format string"); + safe_sprintf(format_str, "{%u}", INT_MAX + 1u); + EXPECT_THROW_MSG((void)fmt::format(runtime(format_str)), format_error, + "argument not found"); +} + +template <int N> struct test_format { + template <typename... T> + static std::string format(fmt::string_view fmt, const T&... args) { + return test_format<N - 1>::format(fmt, N - 1, args...); + } +}; + +template <> struct test_format<0> { + template <typename... T> + static std::string format(fmt::string_view fmt, const T&... args) { + return fmt::format(runtime(fmt), args...); + } +}; + +TEST(format_test, many_args) { + EXPECT_EQ("19", test_format<20>::format("{19}")); + EXPECT_THROW_MSG(test_format<20>::format("{20}"), format_error, + "argument not found"); + EXPECT_THROW_MSG(test_format<21>::format("{21}"), format_error, + "argument not found"); + using fmt::detail::max_packed_args; + std::string format_str = fmt::format("{{{}}}", max_packed_args + 1); + EXPECT_THROW_MSG(test_format<max_packed_args>::format(format_str), + format_error, "argument not found"); +} + +TEST(format_test, named_arg) { + EXPECT_EQ("1/a/A", fmt::format("{_1}/{a_}/{A_}", fmt::arg("a_", 'a'), + fmt::arg("A_", "A"), fmt::arg("_1", 1))); + EXPECT_EQ(" -42", fmt::format("{0:{width}}", -42, fmt::arg("width", 4))); + EXPECT_EQ("st", + fmt::format("{0:.{precision}}", "str", fmt::arg("precision", 2))); + EXPECT_EQ("1 2", fmt::format("{} {two}", 1, fmt::arg("two", 2))); + EXPECT_EQ("42", + fmt::format("{c}", fmt::arg("a", 0), fmt::arg("b", 0), + fmt::arg("c", 42), fmt::arg("d", 0), fmt::arg("e", 0), + fmt::arg("f", 0), fmt::arg("g", 0), fmt::arg("h", 0), + fmt::arg("i", 0), fmt::arg("j", 0), fmt::arg("k", 0), + fmt::arg("l", 0), fmt::arg("m", 0), fmt::arg("n", 0), + fmt::arg("o", 0), fmt::arg("p", 0))); + EXPECT_THROW_MSG((void)fmt::format(runtime("{a}")), format_error, + "argument not found"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{a}"), 42), format_error, + "argument not found"); +} + +TEST(format_test, auto_arg_index) { + EXPECT_EQ("abc", fmt::format("{}{}{}", 'a', 'b', 'c')); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0}{}"), 'a', 'b'), format_error, + "cannot switch from manual to automatic argument indexing"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{}{0}"), 'a', 'b'), format_error, + "cannot switch from automatic to manual argument indexing"); + EXPECT_EQ("1.2", fmt::format("{:.{}}", 1.2345, 2)); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0}:.{}"), 1.2345, 2), + format_error, + "cannot switch from manual to automatic argument indexing"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{:.{0}}"), 1.2345, 2), + format_error, + "cannot switch from automatic to manual argument indexing"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{}")), format_error, + "argument not found"); +} + +TEST(format_test, empty_specs) { EXPECT_EQ("42", fmt::format("{0:}", 42)); } + +TEST(format_test, left_align) { + EXPECT_EQ("42 ", fmt::format("{0:<4}", 42)); + EXPECT_EQ("42 ", fmt::format("{0:<4o}", 042)); + EXPECT_EQ("42 ", fmt::format("{0:<4x}", 0x42)); + EXPECT_EQ("-42 ", fmt::format("{0:<5}", -42)); + EXPECT_EQ("42 ", fmt::format("{0:<5}", 42u)); + EXPECT_EQ("-42 ", fmt::format("{0:<5}", -42l)); + EXPECT_EQ("42 ", fmt::format("{0:<5}", 42ul)); + EXPECT_EQ("-42 ", fmt::format("{0:<5}", -42ll)); + EXPECT_EQ("42 ", fmt::format("{0:<5}", 42ull)); + EXPECT_EQ("-42 ", fmt::format("{0:<5}", -42.0)); + EXPECT_EQ("-42 ", fmt::format("{0:<5}", -42.0l)); + EXPECT_EQ("c ", fmt::format("{0:<5}", 'c')); + EXPECT_EQ("abc ", fmt::format("{0:<5}", "abc")); + EXPECT_EQ("0xface ", fmt::format("{0:<8}", reinterpret_cast<void*>(0xface))); +} + +TEST(format_test, right_align) { + EXPECT_EQ(" 42", fmt::format("{0:>4}", 42)); + EXPECT_EQ(" 42", fmt::format("{0:>4o}", 042)); + EXPECT_EQ(" 42", fmt::format("{0:>4x}", 0x42)); + EXPECT_EQ(" -42", fmt::format("{0:>5}", -42)); + EXPECT_EQ(" 42", fmt::format("{0:>5}", 42u)); + EXPECT_EQ(" -42", fmt::format("{0:>5}", -42l)); + EXPECT_EQ(" 42", fmt::format("{0:>5}", 42ul)); + EXPECT_EQ(" -42", fmt::format("{0:>5}", -42ll)); + EXPECT_EQ(" 42", fmt::format("{0:>5}", 42ull)); + EXPECT_EQ(" -42", fmt::format("{0:>5}", -42.0)); + EXPECT_EQ(" -42", fmt::format("{0:>5}", -42.0l)); + EXPECT_EQ(" c", fmt::format("{0:>5}", 'c')); + EXPECT_EQ(" abc", fmt::format("{0:>5}", "abc")); + EXPECT_EQ(" 0xface", fmt::format("{0:>8}", reinterpret_cast<void*>(0xface))); +} + +TEST(format_test, center_align) { + EXPECT_EQ(" 42 ", fmt::format("{0:^5}", 42)); + EXPECT_EQ(" 42 ", fmt::format("{0:^5o}", 042)); + EXPECT_EQ(" 42 ", fmt::format("{0:^5x}", 0x42)); + EXPECT_EQ(" -42 ", fmt::format("{0:^5}", -42)); + EXPECT_EQ(" 42 ", fmt::format("{0:^5}", 42u)); + EXPECT_EQ(" -42 ", fmt::format("{0:^5}", -42l)); + EXPECT_EQ(" 42 ", fmt::format("{0:^5}", 42ul)); + EXPECT_EQ(" -42 ", fmt::format("{0:^5}", -42ll)); + EXPECT_EQ(" 42 ", fmt::format("{0:^5}", 42ull)); + EXPECT_EQ(" -42 ", fmt::format("{0:^5}", -42.0)); + EXPECT_EQ(" -42 ", fmt::format("{0:^5}", -42.0l)); + EXPECT_EQ(" c ", fmt::format("{0:^5}", 'c')); + EXPECT_EQ(" abc ", fmt::format("{0:^6}", "abc")); + EXPECT_EQ(" 0xface ", fmt::format("{0:^8}", reinterpret_cast<void*>(0xface))); +} + +TEST(format_test, fill) { + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{<5}"), 'c'), format_error, + "invalid fill character '{'"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{<5}}"), 'c'), format_error, + "invalid fill character '{'"); + EXPECT_EQ("**42", fmt::format("{0:*>4}", 42)); + EXPECT_EQ("**-42", fmt::format("{0:*>5}", -42)); + EXPECT_EQ("***42", fmt::format("{0:*>5}", 42u)); + EXPECT_EQ("**-42", fmt::format("{0:*>5}", -42l)); + EXPECT_EQ("***42", fmt::format("{0:*>5}", 42ul)); + EXPECT_EQ("**-42", fmt::format("{0:*>5}", -42ll)); + EXPECT_EQ("***42", fmt::format("{0:*>5}", 42ull)); + EXPECT_EQ("**-42", fmt::format("{0:*>5}", -42.0)); + EXPECT_EQ("**-42", fmt::format("{0:*>5}", -42.0l)); + EXPECT_EQ("c****", fmt::format("{0:*<5}", 'c')); + EXPECT_EQ("abc**", fmt::format("{0:*<5}", "abc")); + EXPECT_EQ("**0xface", + fmt::format("{0:*>8}", reinterpret_cast<void*>(0xface))); + EXPECT_EQ("foo=", fmt::format("{:}=", "foo")); + EXPECT_EQ(std::string("\0\0\0*", 4), + fmt::format(string_view("{:\0>4}", 6), '*')); + EXPECT_EQ("жж42", fmt::format("{0:ж>4}", 42)); + EXPECT_THROW_MSG((void)fmt::format(runtime("{:\x80\x80\x80\x80\x80>}"), 0), + format_error, "invalid type specifier"); +} + +TEST(format_test, plus_sign) { + EXPECT_EQ("+42", fmt::format("{0:+}", 42)); + EXPECT_EQ("-42", fmt::format("{0:+}", -42)); + EXPECT_EQ("+42", fmt::format("{0:+}", 42)); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:+}"), 42u), format_error, + "format specifier requires signed argument"); + EXPECT_EQ("+42", fmt::format("{0:+}", 42l)); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:+}"), 42ul), format_error, + "format specifier requires signed argument"); + EXPECT_EQ("+42", fmt::format("{0:+}", 42ll)); +#if FMT_USE_INT128 + EXPECT_EQ("+42", fmt::format("{0:+}", __int128_t(42))); +#endif + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:+}"), 42ull), format_error, + "format specifier requires signed argument"); + EXPECT_EQ("+42", fmt::format("{0:+}", 42.0)); + EXPECT_EQ("+42", fmt::format("{0:+}", 42.0l)); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:+"), 'c'), format_error, + "missing '}' in format string"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:+}"), 'c'), format_error, + "invalid format specifier for char"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:+}"), "abc"), format_error, + "format specifier requires numeric argument"); + EXPECT_THROW_MSG( + (void)fmt::format(runtime("{0:+}"), reinterpret_cast<void*>(0x42)), + format_error, "format specifier requires numeric argument"); +} + +TEST(format_test, minus_sign) { + EXPECT_EQ("42", fmt::format("{0:-}", 42)); + EXPECT_EQ("-42", fmt::format("{0:-}", -42)); + EXPECT_EQ("42", fmt::format("{0:-}", 42)); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:-}"), 42u), format_error, + "format specifier requires signed argument"); + EXPECT_EQ("42", fmt::format("{0:-}", 42l)); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:-}"), 42ul), format_error, + "format specifier requires signed argument"); + EXPECT_EQ("42", fmt::format("{0:-}", 42ll)); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:-}"), 42ull), format_error, + "format specifier requires signed argument"); + EXPECT_EQ("42", fmt::format("{0:-}", 42.0)); + EXPECT_EQ("42", fmt::format("{0:-}", 42.0l)); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:-"), 'c'), format_error, + "missing '}' in format string"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:-}"), 'c'), format_error, + "invalid format specifier for char"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:-}"), "abc"), format_error, + "format specifier requires numeric argument"); + EXPECT_THROW_MSG( + (void)fmt::format(runtime("{0:-}"), reinterpret_cast<void*>(0x42)), + format_error, "format specifier requires numeric argument"); +} + +TEST(format_test, space_sign) { + EXPECT_EQ(" 42", fmt::format("{0: }", 42)); + EXPECT_EQ("-42", fmt::format("{0: }", -42)); + EXPECT_EQ(" 42", fmt::format("{0: }", 42)); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0: }"), 42u), format_error, + "format specifier requires signed argument"); + EXPECT_EQ(" 42", fmt::format("{0: }", 42l)); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0: }"), 42ul), format_error, + "format specifier requires signed argument"); + EXPECT_EQ(" 42", fmt::format("{0: }", 42ll)); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0: }"), 42ull), format_error, + "format specifier requires signed argument"); + EXPECT_EQ(" 42", fmt::format("{0: }", 42.0)); + EXPECT_EQ(" 42", fmt::format("{0: }", 42.0l)); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0: "), 'c'), format_error, + "missing '}' in format string"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0: }"), 'c'), format_error, + "invalid format specifier for char"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0: }"), "abc"), format_error, + "format specifier requires numeric argument"); + EXPECT_THROW_MSG( + (void)fmt::format(runtime("{0: }"), reinterpret_cast<void*>(0x42)), + format_error, "format specifier requires numeric argument"); +} + +TEST(format_test, hash_flag) { + EXPECT_EQ("42", fmt::format("{0:#}", 42)); + EXPECT_EQ("-42", fmt::format("{0:#}", -42)); + EXPECT_EQ("0b101010", fmt::format("{0:#b}", 42)); + EXPECT_EQ("0B101010", fmt::format("{0:#B}", 42)); + EXPECT_EQ("-0b101010", fmt::format("{0:#b}", -42)); + EXPECT_EQ("0x42", fmt::format("{0:#x}", 0x42)); + EXPECT_EQ("0X42", fmt::format("{0:#X}", 0x42)); + EXPECT_EQ("-0x42", fmt::format("{0:#x}", -0x42)); + EXPECT_EQ("0", fmt::format("{0:#o}", 0)); + EXPECT_EQ("042", fmt::format("{0:#o}", 042)); + EXPECT_EQ("-042", fmt::format("{0:#o}", -042)); + EXPECT_EQ("42", fmt::format("{0:#}", 42u)); + EXPECT_EQ("0x42", fmt::format("{0:#x}", 0x42u)); + EXPECT_EQ("042", fmt::format("{0:#o}", 042u)); + + EXPECT_EQ("-42", fmt::format("{0:#}", -42l)); + EXPECT_EQ("0x42", fmt::format("{0:#x}", 0x42l)); + EXPECT_EQ("-0x42", fmt::format("{0:#x}", -0x42l)); + EXPECT_EQ("042", fmt::format("{0:#o}", 042l)); + EXPECT_EQ("-042", fmt::format("{0:#o}", -042l)); + EXPECT_EQ("42", fmt::format("{0:#}", 42ul)); + EXPECT_EQ("0x42", fmt::format("{0:#x}", 0x42ul)); + EXPECT_EQ("042", fmt::format("{0:#o}", 042ul)); + + EXPECT_EQ("-42", fmt::format("{0:#}", -42ll)); + EXPECT_EQ("0x42", fmt::format("{0:#x}", 0x42ll)); + EXPECT_EQ("-0x42", fmt::format("{0:#x}", -0x42ll)); + EXPECT_EQ("042", fmt::format("{0:#o}", 042ll)); + EXPECT_EQ("-042", fmt::format("{0:#o}", -042ll)); + EXPECT_EQ("42", fmt::format("{0:#}", 42ull)); + EXPECT_EQ("0x42", fmt::format("{0:#x}", 0x42ull)); + EXPECT_EQ("042", fmt::format("{0:#o}", 042ull)); + + EXPECT_EQ("-42.0", fmt::format("{0:#}", -42.0)); + EXPECT_EQ("-42.0", fmt::format("{0:#}", -42.0l)); + EXPECT_EQ("4.e+01", fmt::format("{:#.0e}", 42.0)); + EXPECT_EQ("0.", fmt::format("{:#.0f}", 0.01)); + EXPECT_EQ("0.50", fmt::format("{:#.2g}", 0.5)); + EXPECT_EQ("0.", fmt::format("{:#.0f}", 0.5)); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:#"), 'c'), format_error, + "missing '}' in format string"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:#}"), 'c'), format_error, + "invalid format specifier for char"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:#}"), "abc"), format_error, + "format specifier requires numeric argument"); + EXPECT_THROW_MSG( + (void)fmt::format(runtime("{0:#}"), reinterpret_cast<void*>(0x42)), + format_error, "format specifier requires numeric argument"); +} + +TEST(format_test, zero_flag) { + EXPECT_EQ("42", fmt::format("{0:0}", 42)); + EXPECT_EQ("-0042", fmt::format("{0:05}", -42)); + EXPECT_EQ("00042", fmt::format("{0:05}", 42u)); + EXPECT_EQ("-0042", fmt::format("{0:05}", -42l)); + EXPECT_EQ("00042", fmt::format("{0:05}", 42ul)); + EXPECT_EQ("-0042", fmt::format("{0:05}", -42ll)); + EXPECT_EQ("00042", fmt::format("{0:05}", 42ull)); + EXPECT_EQ("-000042", fmt::format("{0:07}", -42.0)); + EXPECT_EQ("-000042", fmt::format("{0:07}", -42.0l)); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:0"), 'c'), format_error, + "missing '}' in format string"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:05}"), 'c'), format_error, + "invalid format specifier for char"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:05}"), "abc"), format_error, + "format specifier requires numeric argument"); + EXPECT_THROW_MSG( + (void)fmt::format(runtime("{0:05}"), reinterpret_cast<void*>(0x42)), + format_error, "format specifier requires numeric argument"); +} + +TEST(format_test, width) { + char format_str[buffer_size]; + safe_sprintf(format_str, "{0:%u", UINT_MAX); + increment(format_str + 3); + EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error, + "number is too big"); + size_t size = std::strlen(format_str); + format_str[size] = '}'; + format_str[size + 1] = 0; + EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error, + "number is too big"); + + safe_sprintf(format_str, "{0:%u", INT_MAX + 1u); + EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error, + "number is too big"); + safe_sprintf(format_str, "{0:%u}", INT_MAX + 1u); + EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error, + "number is too big"); + EXPECT_EQ(" -42", fmt::format("{0:4}", -42)); + EXPECT_EQ(" 42", fmt::format("{0:5}", 42u)); + EXPECT_EQ(" -42", fmt::format("{0:6}", -42l)); + EXPECT_EQ(" 42", fmt::format("{0:7}", 42ul)); + EXPECT_EQ(" -42", fmt::format("{0:6}", -42ll)); + EXPECT_EQ(" 42", fmt::format("{0:7}", 42ull)); + EXPECT_EQ(" -1.23", fmt::format("{0:8}", -1.23)); + EXPECT_EQ(" -1.23", fmt::format("{0:9}", -1.23l)); + EXPECT_EQ(" 0xcafe", + fmt::format("{0:10}", reinterpret_cast<void*>(0xcafe))); + EXPECT_EQ("x ", fmt::format("{0:11}", 'x')); + EXPECT_EQ("str ", fmt::format("{0:12}", "str")); + EXPECT_EQ(fmt::format("{:*^6}", "🤡"), "**🤡**"); + EXPECT_EQ(fmt::format("{:*^8}", "你好"), "**你好**"); + EXPECT_EQ(fmt::format("{:#6}", 42.0), " 42.0"); + EXPECT_EQ(fmt::format("{:6c}", static_cast<int>('x')), "x "); + EXPECT_EQ(fmt::format("{:>06.0f}", 0.00884311), "000000"); +} + +TEST(format_test, runtime_width) { + char format_str[buffer_size]; + safe_sprintf(format_str, "{0:{%u", UINT_MAX); + increment(format_str + 4); + EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error, + "invalid format string"); + size_t size = std::strlen(format_str); + format_str[size] = '}'; + format_str[size + 1] = 0; + EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error, + "argument not found"); + format_str[size + 1] = '}'; + format_str[size + 2] = 0; + EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error, + "argument not found"); + + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{"), 0), format_error, + "invalid format string"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{}"), 0), format_error, + "cannot switch from manual to automatic argument indexing"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{?}}"), 0), format_error, + "invalid format string"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{1}}"), 0), format_error, + "argument not found"); + + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{0:}}"), 0), format_error, + "invalid format string"); + + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{1}}"), 0, -1), format_error, + "negative width"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{1}}"), 0, (INT_MAX + 1u)), + format_error, "number is too big"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{1}}"), 0, -1l), format_error, + "negative width"); + if (fmt::detail::const_check(sizeof(long) > sizeof(int))) { + long value = INT_MAX; + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{1}}"), 0, (value + 1)), + format_error, "number is too big"); + } + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{1}}"), 0, (INT_MAX + 1ul)), + format_error, "number is too big"); + + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{1}}"), 0, '0'), format_error, + "width is not integer"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{1}}"), 0, 0.0), format_error, + "width is not integer"); + + EXPECT_EQ(" -42", fmt::format("{0:{1}}", -42, 4)); + EXPECT_EQ(" 42", fmt::format("{0:{1}}", 42u, 5)); + EXPECT_EQ(" -42", fmt::format("{0:{1}}", -42l, 6)); + EXPECT_EQ(" 42", fmt::format("{0:{1}}", 42ul, 7)); + EXPECT_EQ(" -42", fmt::format("{0:{1}}", -42ll, 6)); + EXPECT_EQ(" 42", fmt::format("{0:{1}}", 42ull, 7)); + EXPECT_EQ(" -1.23", fmt::format("{0:{1}}", -1.23, 8)); + EXPECT_EQ(" -1.23", fmt::format("{0:{1}}", -1.23l, 9)); + EXPECT_EQ(" 0xcafe", + fmt::format("{0:{1}}", reinterpret_cast<void*>(0xcafe), 10)); + EXPECT_EQ("x ", fmt::format("{0:{1}}", 'x', 11)); + EXPECT_EQ("str ", fmt::format("{0:{1}}", "str", 12)); + EXPECT_EQ(fmt::format("{:{}}", 42, short(4)), " 42"); +} + +TEST(format_test, precision) { + char format_str[buffer_size]; + safe_sprintf(format_str, "{0:.%u", UINT_MAX); + increment(format_str + 4); + EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error, + "number is too big"); + size_t size = std::strlen(format_str); + format_str[size] = '}'; + format_str[size + 1] = 0; + EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error, + "number is too big"); + + safe_sprintf(format_str, "{0:.%u", INT_MAX + 1u); + EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error, + "number is too big"); + safe_sprintf(format_str, "{0:.%u}", INT_MAX + 1u); + EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error, + "number is too big"); + + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:."), 0), format_error, + "missing precision specifier"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.}"), 0), format_error, + "missing precision specifier"); + + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2"), 0), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2}"), 42), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2f}"), 42), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2}"), 42u), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2f}"), 42u), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2}"), 42l), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2f}"), 42l), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2}"), 42ul), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2f}"), 42ul), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2}"), 42ll), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2f}"), 42ll), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2}"), 42ull), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2f}"), 42ull), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:3.0}"), 'x'), format_error, + "precision not allowed for this argument type"); + EXPECT_EQ("1.2", fmt::format("{0:.2}", 1.2345)); + EXPECT_EQ("1.2", fmt::format("{0:.2}", 1.2345l)); + EXPECT_EQ("1.2e+56", fmt::format("{:.2}", 1.234e56)); + EXPECT_EQ("1.1", fmt::format("{0:.3}", 1.1)); + EXPECT_EQ("1e+00", fmt::format("{:.0e}", 1.0L)); + EXPECT_EQ(" 0.0e+00", fmt::format("{:9.1e}", 0.0)); + EXPECT_EQ( + fmt::format("{:.494}", 4.9406564584124654E-324), + "4.9406564584124654417656879286822137236505980261432476442558568250067550" + "727020875186529983636163599237979656469544571773092665671035593979639877" + "479601078187812630071319031140452784581716784898210368871863605699873072" + "305000638740915356498438731247339727316961514003171538539807412623856559" + "117102665855668676818703956031062493194527159149245532930545654440112748" + "012970999954193198940908041656332452475714786901472678015935523861155013" + "480352649347201937902681071074917033322268447533357208324319361e-324"); + EXPECT_EQ( + fmt::format("{:.1074f}", 1.1125369292536e-308), + "0.0000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000111253692925360019747947051741965785554081512200979" + "355021686109411883779182127659725163430929750364498219730822952552570601" + "152163505899912777129583674906301179059298598412303893909188340988729019" + "014361467448914817838555156840459458527907308695109202499990850735085304" + "478476991912072201449236975063640913461919914396877093174125167509869762" + "482369631100360266123742648159508919592746619553246586039571522788247697" + "156360766271842991667238355464496455107749716934387136380536472531224398" + "559833794807213172371254492216255558078524900147957309382830827524104234" + "530961756787819847850302379672357738807808384667004752163416921762619527" + "462847642037420991432005657440259928195996762610375541867198059294212446" + "81962777939941034720757232455434770912461317493580281734466552734375"); + + std::string outputs[] = { + "-0X1.41FE3FFE71C9E000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000P+127", + "-0XA.0FF1FFF38E4F0000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000P+124"}; + EXPECT_THAT(outputs, + testing::Contains(fmt::format("{:.838A}", -2.14001164E+38))); + + if (std::numeric_limits<long double>::digits == 64) { + auto ld = (std::numeric_limits<long double>::min)(); + EXPECT_EQ(fmt::format("{:.0}", ld), "3e-4932"); + EXPECT_EQ( + fmt::format("{:0g}", std::numeric_limits<long double>::denorm_min()), + "3.6452e-4951"); + } + + EXPECT_EQ("123.", fmt::format("{:#.0f}", 123.0)); + EXPECT_EQ("1.23", fmt::format("{:.02f}", 1.234)); + EXPECT_EQ("0.001", fmt::format("{:.1g}", 0.001)); + EXPECT_EQ("1019666400", fmt::format("{}", 1019666432.0f)); + EXPECT_EQ("1e+01", fmt::format("{:.0e}", 9.5)); + EXPECT_EQ("1.0e-34", fmt::format("{:.1e}", 1e-34)); + + EXPECT_THROW_MSG( + (void)fmt::format(runtime("{0:.2}"), reinterpret_cast<void*>(0xcafe)), + format_error, "precision not allowed for this argument type"); + EXPECT_THROW_MSG( + (void)fmt::format(runtime("{0:.2f}"), reinterpret_cast<void*>(0xcafe)), + format_error, "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{:.{}e}"), 42.0, + fmt::detail::max_value<int>()), + format_error, "number is too big"); + EXPECT_THROW_MSG( + (void)fmt::format("{:.2147483646f}", -2.2121295195081227E+304), + format_error, "number is too big"); + + EXPECT_EQ("st", fmt::format("{0:.2}", "str")); + EXPECT_EQ("вожык", fmt::format("{0:.5}", "вожыкі")); +} + +TEST(format_test, runtime_precision) { + char format_str[buffer_size]; + safe_sprintf(format_str, "{0:.{%u", UINT_MAX); + increment(format_str + 5); + EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error, + "invalid format string"); + size_t size = std::strlen(format_str); + format_str[size] = '}'; + format_str[size + 1] = 0; + EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error, + "argument not found"); + format_str[size + 1] = '}'; + format_str[size + 2] = 0; + EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error, + "argument not found"); + + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{"), 0), format_error, + "invalid format string"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{}"), 0), format_error, + "cannot switch from manual to automatic argument indexing"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{?}}"), 0), format_error, + "invalid format string"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}"), 0, 0), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0), format_error, + "argument not found"); + + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{0:}}"), 0), format_error, + "invalid format string"); + + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0, -1), format_error, + "negative precision"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0, (INT_MAX + 1u)), + format_error, "number is too big"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0, -1l), format_error, + "negative precision"); + if (fmt::detail::const_check(sizeof(long) > sizeof(int))) { + long value = INT_MAX; + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0, (value + 1)), + format_error, "number is too big"); + } + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0, (INT_MAX + 1ul)), + format_error, "number is too big"); + + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0, '0'), format_error, + "precision is not integer"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0, 0.0), format_error, + "precision is not integer"); + + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 42, 2), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"), 42, 2), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 42u, 2), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"), 42u, 2), + format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 42l, 2), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"), 42l, 2), + format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 42ul, 2), + format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"), 42ul, 2), + format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 42ll, 2), + format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"), 42ll, 2), + format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 42ull, 2), + format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"), 42ull, 2), + format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:3.{1}}"), 'x', 0), + format_error, + "precision not allowed for this argument type"); + EXPECT_EQ("1.2", fmt::format("{0:.{1}}", 1.2345, 2)); + EXPECT_EQ("1.2", fmt::format("{1:.{0}}", 2, 1.2345l)); + + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), + reinterpret_cast<void*>(0xcafe), 2), + format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"), + reinterpret_cast<void*>(0xcafe), 2), + format_error, + "precision not allowed for this argument type"); + + EXPECT_EQ("st", fmt::format("{0:.{1}}", "str", 2)); +} + +TEST(format_test, format_bool) { + EXPECT_EQ("true", fmt::format("{}", true)); + EXPECT_EQ("false", fmt::format("{}", false)); + EXPECT_EQ("1", fmt::format("{:d}", true)); + EXPECT_EQ("true ", fmt::format("{:5}", true)); + EXPECT_EQ("true", fmt::format("{:s}", true)); + EXPECT_EQ("false", fmt::format("{:s}", false)); + EXPECT_EQ("false ", fmt::format("{:6s}", false)); +} + +TEST(format_test, format_short) { + short s = 42; + EXPECT_EQ("42", fmt::format("{0:d}", s)); + unsigned short us = 42; + EXPECT_EQ("42", fmt::format("{0:d}", us)); +} + +template <typename T> +void check_unknown_types(const T& value, const char* types, const char*) { + char format_str[buffer_size]; + const char* special = ".0123456789L?}"; + for (int i = CHAR_MIN; i <= CHAR_MAX; ++i) { + char c = static_cast<char>(i); + if (std::strchr(types, c) || std::strchr(special, c) || !c) continue; + safe_sprintf(format_str, "{0:10%c}", c); + const char* message = "invalid type specifier"; + EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), value), + format_error, message) + << format_str << " " << message; + } +} + +TEST(format_test, format_int) { + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:v"), 42), format_error, + "invalid type specifier"); + check_unknown_types(42, "bBdoxXnLc", "integer"); + EXPECT_EQ("x", fmt::format("{:c}", static_cast<int>('x'))); +} + +TEST(format_test, format_bin) { + EXPECT_EQ("0", fmt::format("{0:b}", 0)); + EXPECT_EQ("101010", fmt::format("{0:b}", 42)); + EXPECT_EQ("101010", fmt::format("{0:b}", 42u)); + EXPECT_EQ("-101010", fmt::format("{0:b}", -42)); + EXPECT_EQ("11000000111001", fmt::format("{0:b}", 12345)); + EXPECT_EQ("10010001101000101011001111000", fmt::format("{0:b}", 0x12345678)); + EXPECT_EQ("10010000101010111100110111101111", + fmt::format("{0:b}", 0x90ABCDEF)); + EXPECT_EQ("11111111111111111111111111111111", + fmt::format("{0:b}", max_value<uint32_t>())); +} + +#if FMT_USE_INT128 +constexpr auto int128_max = static_cast<__int128_t>( + (static_cast<__uint128_t>(1) << ((__SIZEOF_INT128__ * CHAR_BIT) - 1)) - 1); +constexpr auto int128_min = -int128_max - 1; + +constexpr auto uint128_max = ~static_cast<__uint128_t>(0); +#endif + +TEST(format_test, format_dec) { + EXPECT_EQ("0", fmt::format("{0}", 0)); + EXPECT_EQ("42", fmt::format("{0}", 42)); + EXPECT_EQ("42", fmt::format("{0:d}", 42)); + EXPECT_EQ("42", fmt::format("{0}", 42u)); + EXPECT_EQ("-42", fmt::format("{0}", -42)); + EXPECT_EQ("12345", fmt::format("{0}", 12345)); + EXPECT_EQ("67890", fmt::format("{0}", 67890)); +#if FMT_USE_INT128 + EXPECT_EQ("0", fmt::format("{0}", static_cast<__int128_t>(0))); + EXPECT_EQ("0", fmt::format("{0}", static_cast<__uint128_t>(0))); + EXPECT_EQ("9223372036854775808", + fmt::format("{0}", static_cast<__int128_t>(INT64_MAX) + 1)); + EXPECT_EQ("-9223372036854775809", + fmt::format("{0}", static_cast<__int128_t>(INT64_MIN) - 1)); + EXPECT_EQ("18446744073709551616", + fmt::format("{0}", static_cast<__int128_t>(UINT64_MAX) + 1)); + EXPECT_EQ("170141183460469231731687303715884105727", + fmt::format("{0}", int128_max)); + EXPECT_EQ("-170141183460469231731687303715884105728", + fmt::format("{0}", int128_min)); + EXPECT_EQ("340282366920938463463374607431768211455", + fmt::format("{0}", uint128_max)); +#endif + + char buffer[buffer_size]; + safe_sprintf(buffer, "%d", INT_MIN); + EXPECT_EQ(buffer, fmt::format("{0}", INT_MIN)); + safe_sprintf(buffer, "%d", INT_MAX); + EXPECT_EQ(buffer, fmt::format("{0}", INT_MAX)); + safe_sprintf(buffer, "%u", UINT_MAX); + EXPECT_EQ(buffer, fmt::format("{0}", UINT_MAX)); + safe_sprintf(buffer, "%ld", 0 - static_cast<unsigned long>(LONG_MIN)); + EXPECT_EQ(buffer, fmt::format("{0}", LONG_MIN)); + safe_sprintf(buffer, "%ld", LONG_MAX); + EXPECT_EQ(buffer, fmt::format("{0}", LONG_MAX)); + safe_sprintf(buffer, "%lu", ULONG_MAX); + EXPECT_EQ(buffer, fmt::format("{0}", ULONG_MAX)); +} + +TEST(format_test, format_hex) { + EXPECT_EQ("0", fmt::format("{0:x}", 0)); + EXPECT_EQ("42", fmt::format("{0:x}", 0x42)); + EXPECT_EQ("42", fmt::format("{0:x}", 0x42u)); + EXPECT_EQ("-42", fmt::format("{0:x}", -0x42)); + EXPECT_EQ("12345678", fmt::format("{0:x}", 0x12345678)); + EXPECT_EQ("90abcdef", fmt::format("{0:x}", 0x90abcdef)); + EXPECT_EQ("12345678", fmt::format("{0:X}", 0x12345678)); + EXPECT_EQ("90ABCDEF", fmt::format("{0:X}", 0x90ABCDEF)); +#if FMT_USE_INT128 + EXPECT_EQ("0", fmt::format("{0:x}", static_cast<__int128_t>(0))); + EXPECT_EQ("0", fmt::format("{0:x}", static_cast<__uint128_t>(0))); + EXPECT_EQ("8000000000000000", + fmt::format("{0:x}", static_cast<__int128_t>(INT64_MAX) + 1)); + EXPECT_EQ("-8000000000000001", + fmt::format("{0:x}", static_cast<__int128_t>(INT64_MIN) - 1)); + EXPECT_EQ("10000000000000000", + fmt::format("{0:x}", static_cast<__int128_t>(UINT64_MAX) + 1)); + EXPECT_EQ("7fffffffffffffffffffffffffffffff", + fmt::format("{0:x}", int128_max)); + EXPECT_EQ("-80000000000000000000000000000000", + fmt::format("{0:x}", int128_min)); + EXPECT_EQ("ffffffffffffffffffffffffffffffff", + fmt::format("{0:x}", uint128_max)); +#endif + + char buffer[buffer_size]; + safe_sprintf(buffer, "-%x", 0 - static_cast<unsigned>(INT_MIN)); + EXPECT_EQ(buffer, fmt::format("{0:x}", INT_MIN)); + safe_sprintf(buffer, "%x", INT_MAX); + EXPECT_EQ(buffer, fmt::format("{0:x}", INT_MAX)); + safe_sprintf(buffer, "%x", UINT_MAX); + EXPECT_EQ(buffer, fmt::format("{0:x}", UINT_MAX)); + safe_sprintf(buffer, "-%lx", 0 - static_cast<unsigned long>(LONG_MIN)); + EXPECT_EQ(buffer, fmt::format("{0:x}", LONG_MIN)); + safe_sprintf(buffer, "%lx", LONG_MAX); + EXPECT_EQ(buffer, fmt::format("{0:x}", LONG_MAX)); + safe_sprintf(buffer, "%lx", ULONG_MAX); + EXPECT_EQ(buffer, fmt::format("{0:x}", ULONG_MAX)); +} + +TEST(format_test, format_oct) { + EXPECT_EQ("0", fmt::format("{0:o}", 0)); + EXPECT_EQ("42", fmt::format("{0:o}", 042)); + EXPECT_EQ("42", fmt::format("{0:o}", 042u)); + EXPECT_EQ("-42", fmt::format("{0:o}", -042)); + EXPECT_EQ("12345670", fmt::format("{0:o}", 012345670)); +#if FMT_USE_INT128 + EXPECT_EQ("0", fmt::format("{0:o}", static_cast<__int128_t>(0))); + EXPECT_EQ("0", fmt::format("{0:o}", static_cast<__uint128_t>(0))); + EXPECT_EQ("1000000000000000000000", + fmt::format("{0:o}", static_cast<__int128_t>(INT64_MAX) + 1)); + EXPECT_EQ("-1000000000000000000001", + fmt::format("{0:o}", static_cast<__int128_t>(INT64_MIN) - 1)); + EXPECT_EQ("2000000000000000000000", + fmt::format("{0:o}", static_cast<__int128_t>(UINT64_MAX) + 1)); + EXPECT_EQ("1777777777777777777777777777777777777777777", + fmt::format("{0:o}", int128_max)); + EXPECT_EQ("-2000000000000000000000000000000000000000000", + fmt::format("{0:o}", int128_min)); + EXPECT_EQ("3777777777777777777777777777777777777777777", + fmt::format("{0:o}", uint128_max)); +#endif + + char buffer[buffer_size]; + safe_sprintf(buffer, "-%o", 0 - static_cast<unsigned>(INT_MIN)); + EXPECT_EQ(buffer, fmt::format("{0:o}", INT_MIN)); + safe_sprintf(buffer, "%o", INT_MAX); + EXPECT_EQ(buffer, fmt::format("{0:o}", INT_MAX)); + safe_sprintf(buffer, "%o", UINT_MAX); + EXPECT_EQ(buffer, fmt::format("{0:o}", UINT_MAX)); + safe_sprintf(buffer, "-%lo", 0 - static_cast<unsigned long>(LONG_MIN)); + EXPECT_EQ(buffer, fmt::format("{0:o}", LONG_MIN)); + safe_sprintf(buffer, "%lo", LONG_MAX); + EXPECT_EQ(buffer, fmt::format("{0:o}", LONG_MAX)); + safe_sprintf(buffer, "%lo", ULONG_MAX); + EXPECT_EQ(buffer, fmt::format("{0:o}", ULONG_MAX)); +} + +TEST(format_test, format_int_locale) { + EXPECT_EQ("1234", fmt::format("{:L}", 1234)); +} + +TEST(format_test, format_float) { + EXPECT_EQ("0", fmt::format("{}", 0.0f)); + EXPECT_EQ("392.500000", fmt::format("{0:f}", 392.5f)); +} + +TEST(format_test, format_double) { + EXPECT_EQ(fmt::format("{}", 0.0), "0"); + check_unknown_types(1.2, "eEfFgGaAnL%", "double"); + EXPECT_EQ(fmt::format("{:}", 0.0), "0"); + EXPECT_EQ(fmt::format("{:f}", 0.0), "0.000000"); + EXPECT_EQ(fmt::format("{:g}", 0.0), "0"); + EXPECT_EQ(fmt::format("{:}", 392.65), "392.65"); + EXPECT_EQ(fmt::format("{:g}", 392.65), "392.65"); + EXPECT_EQ(fmt::format("{:G}", 392.65), "392.65"); + EXPECT_EQ(fmt::format("{:g}", 4.9014e6), "4.9014e+06"); + EXPECT_EQ(fmt::format("{:f}", 392.65), "392.650000"); + EXPECT_EQ(fmt::format("{:F}", 392.65), "392.650000"); + EXPECT_EQ(fmt::format("{:L}", 42.0), "42"); + EXPECT_EQ(fmt::format("{:24a}", 4.2), " 0x1.0cccccccccccdp+2"); + EXPECT_EQ(fmt::format("{:<24a}", 4.2), "0x1.0cccccccccccdp+2 "); + EXPECT_EQ(fmt::format("{0:e}", 392.65), "3.926500e+02"); + EXPECT_EQ(fmt::format("{0:E}", 392.65), "3.926500E+02"); + EXPECT_EQ(fmt::format("{0:+010.4g}", 392.65), "+0000392.6"); + char buffer[buffer_size]; + safe_sprintf(buffer, "%a", -42.0); + EXPECT_EQ(fmt::format("{:a}", -42.0), buffer); + safe_sprintf(buffer, "%A", -42.0); + EXPECT_EQ(fmt::format("{:A}", -42.0), buffer); + EXPECT_EQ(fmt::format("{:f}", 9223372036854775807.0), + "9223372036854775808.000000"); +} + +TEST(format_test, precision_rounding) { + EXPECT_EQ("0", fmt::format("{:.0f}", 0.0)); + EXPECT_EQ("0", fmt::format("{:.0f}", 0.01)); + EXPECT_EQ("0", fmt::format("{:.0f}", 0.1)); + EXPECT_EQ("0.000", fmt::format("{:.3f}", 0.00049)); + EXPECT_EQ("0.001", fmt::format("{:.3f}", 0.0005)); + EXPECT_EQ("0.001", fmt::format("{:.3f}", 0.00149)); + EXPECT_EQ("0.002", fmt::format("{:.3f}", 0.0015)); + EXPECT_EQ("1.000", fmt::format("{:.3f}", 0.9999)); + EXPECT_EQ("0.00123", fmt::format("{:.3}", 0.00123)); + EXPECT_EQ("0.1", fmt::format("{:.16g}", 0.1)); + EXPECT_EQ("1", fmt::format("{:.0}", 1.0)); + EXPECT_EQ("225.51575035152063720", + fmt::format("{:.17f}", 225.51575035152064)); + EXPECT_EQ("-761519619559038.2", fmt::format("{:.1f}", -761519619559038.2)); + EXPECT_EQ("1.9156918820264798e-56", + fmt::format("{}", 1.9156918820264798e-56)); + EXPECT_EQ("0.0000", fmt::format("{:.4f}", 7.2809479766055470e-15)); + + // Trigger a rounding error in Grisu by a specially chosen number. + EXPECT_EQ("3788512123356.985352", fmt::format("{:f}", 3788512123356.985352)); +} + +TEST(format_test, prettify_float) { + EXPECT_EQ("0.0001", fmt::format("{}", 1e-4)); + EXPECT_EQ("1e-05", fmt::format("{}", 1e-5)); + EXPECT_EQ("1000000000000000", fmt::format("{}", 1e15)); + EXPECT_EQ("1e+16", fmt::format("{}", 1e16)); + EXPECT_EQ("9.999e-05", fmt::format("{}", 9.999e-5)); + EXPECT_EQ("10000000000", fmt::format("{}", 1e10)); + EXPECT_EQ("100000000000", fmt::format("{}", 1e11)); + EXPECT_EQ("12340000000", fmt::format("{}", 1234e7)); + EXPECT_EQ("12.34", fmt::format("{}", 1234e-2)); + EXPECT_EQ("0.001234", fmt::format("{}", 1234e-6)); + EXPECT_EQ("0.1", fmt::format("{}", 0.1f)); + EXPECT_EQ("0.10000000149011612", fmt::format("{}", double(0.1f))); + EXPECT_EQ("1.3563156e-19", fmt::format("{}", 1.35631564e-19f)); +} + +TEST(format_test, format_nan) { + double nan = std::numeric_limits<double>::quiet_NaN(); + EXPECT_EQ("nan", fmt::format("{}", nan)); + EXPECT_EQ("+nan", fmt::format("{:+}", nan)); + EXPECT_EQ(" +nan", fmt::format("{:+06}", nan)); + EXPECT_EQ("+nan ", fmt::format("{:<+06}", nan)); + EXPECT_EQ(" +nan ", fmt::format("{:^+06}", nan)); + EXPECT_EQ(" +nan", fmt::format("{:>+06}", nan)); + if (std::signbit(-nan)) { + EXPECT_EQ("-nan", fmt::format("{}", -nan)); + EXPECT_EQ(" -nan", fmt::format("{:+06}", -nan)); + } else { + fmt::print("Warning: compiler doesn't handle negative NaN correctly"); + } + EXPECT_EQ(" nan", fmt::format("{: }", nan)); + EXPECT_EQ("NAN", fmt::format("{:F}", nan)); + EXPECT_EQ("nan ", fmt::format("{:<7}", nan)); + EXPECT_EQ(" nan ", fmt::format("{:^7}", nan)); + EXPECT_EQ(" nan", fmt::format("{:>7}", nan)); +} + +TEST(format_test, format_infinity) { + double inf = std::numeric_limits<double>::infinity(); + EXPECT_EQ("inf", fmt::format("{}", inf)); + EXPECT_EQ("+inf", fmt::format("{:+}", inf)); + EXPECT_EQ("-inf", fmt::format("{}", -inf)); + EXPECT_EQ(" +inf", fmt::format("{:+06}", inf)); + EXPECT_EQ(" -inf", fmt::format("{:+06}", -inf)); + EXPECT_EQ("+inf ", fmt::format("{:<+06}", inf)); + EXPECT_EQ(" +inf ", fmt::format("{:^+06}", inf)); + EXPECT_EQ(" +inf", fmt::format("{:>+06}", inf)); + EXPECT_EQ(" inf", fmt::format("{: }", inf)); + EXPECT_EQ("INF", fmt::format("{:F}", inf)); + EXPECT_EQ("inf ", fmt::format("{:<7}", inf)); + EXPECT_EQ(" inf ", fmt::format("{:^7}", inf)); + EXPECT_EQ(" inf", fmt::format("{:>7}", inf)); +} + +TEST(format_test, format_long_double) { + EXPECT_EQ("0", fmt::format("{0:}", 0.0l)); + EXPECT_EQ("0.000000", fmt::format("{0:f}", 0.0l)); + EXPECT_EQ("392.65", fmt::format("{0:}", 392.65l)); + EXPECT_EQ("392.65", fmt::format("{0:g}", 392.65l)); + EXPECT_EQ("392.65", fmt::format("{0:G}", 392.65l)); + EXPECT_EQ("392.650000", fmt::format("{0:f}", 392.65l)); + EXPECT_EQ("392.650000", fmt::format("{0:F}", 392.65l)); + char buffer[buffer_size]; + safe_sprintf(buffer, "%Le", 392.65l); + EXPECT_EQ(buffer, fmt::format("{0:e}", 392.65l)); + EXPECT_EQ("+0000392.6", fmt::format("{0:+010.4g}", 392.64l)); + safe_sprintf(buffer, "%La", 3.31l); + EXPECT_EQ(buffer, fmt::format("{:a}", 3.31l)); +} + +TEST(format_test, format_char) { + const char types[] = "cbBdoxX"; + check_unknown_types('a', types, "char"); + EXPECT_EQ("a", fmt::format("{0}", 'a')); + EXPECT_EQ("z", fmt::format("{0:c}", 'z')); + int n = 'x'; + for (const char* type = types + 1; *type; ++type) { + std::string format_str = fmt::format("{{:{}}}", *type); + EXPECT_EQ(fmt::format(runtime(format_str), n), + fmt::format(runtime(format_str), 'x')) + << format_str; + } + EXPECT_EQ(fmt::format("{:02X}", n), fmt::format("{:02X}", 'x')); + + EXPECT_EQ("\n", fmt::format("{}", '\n')); + EXPECT_EQ("'\\n'", fmt::format("{:?}", '\n')); +} + +TEST(format_test, format_volatile_char) { + volatile char c = 'x'; + EXPECT_EQ("x", fmt::format("{}", c)); +} + +TEST(format_test, format_unsigned_char) { + EXPECT_EQ("42", fmt::format("{}", static_cast<unsigned char>(42))); + EXPECT_EQ("42", fmt::format("{}", static_cast<uint8_t>(42))); +} + +TEST(format_test, format_cstring) { + check_unknown_types("test", "sp", "string"); + EXPECT_EQ("test", fmt::format("{0}", "test")); + EXPECT_EQ("test", fmt::format("{0:s}", "test")); + char nonconst[] = "nonconst"; + EXPECT_EQ("nonconst", fmt::format("{0}", nonconst)); + EXPECT_THROW_MSG( + (void)fmt::format(runtime("{0}"), static_cast<const char*>(nullptr)), + format_error, "string pointer is null"); +} + +void function_pointer_test(int, double, std::string) {} + +TEST(format_test, format_pointer) { + check_unknown_types(reinterpret_cast<void*>(0x1234), "p", "pointer"); + EXPECT_EQ("0x0", fmt::format("{0}", static_cast<void*>(nullptr))); + EXPECT_EQ("0x1234", fmt::format("{0}", reinterpret_cast<void*>(0x1234))); + EXPECT_EQ("0x1234", fmt::format("{0:p}", reinterpret_cast<void*>(0x1234))); + // On CHERI (or other fat-pointer) systems, the size of a pointer is greater + // than the size an integer that can hold a virtual address. There is no + // portable address-as-an-integer type (yet) in C++, so we use `size_t` as + // the closest equivalent for now. + EXPECT_EQ("0x" + std::string(sizeof(size_t) * CHAR_BIT / 4, 'f'), + fmt::format("{0}", reinterpret_cast<void*>(~uintptr_t()))); + EXPECT_EQ("0x1234", + fmt::format("{}", fmt::ptr(reinterpret_cast<int*>(0x1234)))); + std::unique_ptr<int> up(new int(1)); + EXPECT_EQ(fmt::format("{}", fmt::ptr(up.get())), + fmt::format("{}", fmt::ptr(up))); + std::shared_ptr<int> sp(new int(1)); + EXPECT_EQ(fmt::format("{}", fmt::ptr(sp.get())), + fmt::format("{}", fmt::ptr(sp))); + EXPECT_EQ(fmt::format("{}", fmt::detail::bit_cast<const void*>( + &function_pointer_test)), + fmt::format("{}", fmt::ptr(function_pointer_test))); + EXPECT_EQ("0x0", fmt::format("{}", nullptr)); +} + +TEST(format_test, write_uintptr_fallback) { + // Test that formatting a pointer by converting it to uint128_fallback works. + // This is needed to support systems without uintptr_t. + auto s = std::string(); + fmt::detail::write_ptr<char>( + std::back_inserter(s), + fmt::detail::bit_cast<fmt::detail::uint128_fallback>( + reinterpret_cast<void*>(0xface)), + nullptr); + EXPECT_EQ(s, "0xface"); +} + +enum class color { red, green, blue }; + +namespace test_ns { +enum class color { red, green, blue }; +using fmt::enums::format_as; +} // namespace test_ns + +TEST(format_test, format_enum_class) { + EXPECT_EQ(fmt::format("{}", fmt::underlying(color::red)), "0"); + EXPECT_EQ(fmt::format("{}", test_ns::color::red), "0"); +} + +TEST(format_test, format_string) { + EXPECT_EQ(fmt::format("{0}", std::string("test")), "test"); + EXPECT_EQ(fmt::format("{0}", std::string("test")), "test"); + EXPECT_EQ(fmt::format("{:?}", std::string("test")), "\"test\""); + EXPECT_EQ(fmt::format("{:*^10?}", std::string("test")), "**\"test\"**"); + EXPECT_EQ(fmt::format("{:?}", std::string("\test")), "\"\\test\""); + EXPECT_THROW((void)fmt::format(fmt::runtime("{:x}"), std::string("test")), + fmt::format_error); +} + +TEST(format_test, format_string_view) { + EXPECT_EQ("test", fmt::format("{}", string_view("test"))); + EXPECT_EQ("\"t\\nst\"", fmt::format("{:?}", string_view("t\nst"))); + EXPECT_EQ("", fmt::format("{}", string_view())); +} + +#ifdef FMT_USE_STRING_VIEW +struct string_viewable {}; + +FMT_BEGIN_NAMESPACE +template <> struct formatter<string_viewable> : formatter<std::string_view> { + auto format(string_viewable, format_context& ctx) -> decltype(ctx.out()) { + return formatter<std::string_view>::format("foo", ctx); + } +}; +FMT_END_NAMESPACE + +TEST(format_test, format_std_string_view) { + EXPECT_EQ("test", fmt::format("{}", std::string_view("test"))); + EXPECT_EQ("foo", fmt::format("{}", string_viewable())); +} + +struct explicitly_convertible_to_std_string_view { + explicit operator std::string_view() const { return "foo"; } +}; + +template <> +struct fmt::formatter<explicitly_convertible_to_std_string_view> + : formatter<std::string_view> { + auto format(explicitly_convertible_to_std_string_view v, format_context& ctx) + -> decltype(ctx.out()) { + return format_to(ctx.out(), "'{}'", std::string_view(v)); + } +}; + +TEST(format_test, format_explicitly_convertible_to_std_string_view) { + EXPECT_EQ("'foo'", + fmt::format("{}", explicitly_convertible_to_std_string_view())); +} +#endif + +struct converible_to_anything { + template <typename T> operator T() const { return T(); } +}; + +FMT_BEGIN_NAMESPACE +template <> struct formatter<converible_to_anything> { + FMT_CONSTEXPR auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) { + return ctx.begin(); + } + + auto format(converible_to_anything, format_context& ctx) + -> decltype(ctx.out()) { + return format_to(ctx.out(), "foo"); + } +}; +FMT_END_NAMESPACE + +TEST(format_test, format_convertible_to_anything) { + EXPECT_EQ("foo", fmt::format("{}", converible_to_anything())); +} + +class Answer {}; + +FMT_BEGIN_NAMESPACE +template <> struct formatter<date> { + template <typename ParseContext> + FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) { + auto it = ctx.begin(); + if (it != ctx.end() && *it == 'd') ++it; + return it; + } + + auto format(const date& d, format_context& ctx) -> decltype(ctx.out()) { + format_to(ctx.out(), "{}-{}-{}", d.year(), d.month(), d.day()); + return ctx.out(); + } +}; + +template <> struct formatter<Answer> : formatter<int> { + template <typename FormatContext> + auto format(Answer, FormatContext& ctx) -> decltype(ctx.out()) { + return formatter<int>::format(42, ctx); + } +}; +FMT_END_NAMESPACE + +TEST(format_test, format_custom) { + EXPECT_THROW_MSG((void)fmt::format(runtime("{:s}"), date(2012, 12, 9)), + format_error, "unknown format specifier"); + EXPECT_EQ("42", fmt::format("{0}", Answer())); + EXPECT_EQ("0042", fmt::format("{:04}", Answer())); +} + +TEST(format_test, format_to_custom) { + char buf[10] = {}; + auto end = + &*fmt::format_to(fmt::detail::make_checked(buf, 10), "{}", Answer()); + EXPECT_EQ(end, buf + 2); + EXPECT_STREQ(buf, "42"); +} + +TEST(format_test, format_string_from_speed_test) { + EXPECT_EQ("1.2340000000:0042:+3.13:str:0x3e8:X:%", + fmt::format("{0:0.10f}:{1:04}:{2:+g}:{3}:{4}:{5}:%", 1.234, 42, + 3.13, "str", reinterpret_cast<void*>(1000), 'X')); +} + +TEST(format_test, format_examples) { + std::string message = fmt::format("The answer is {}", 42); + EXPECT_EQ("The answer is 42", message); + + EXPECT_EQ("42", fmt::format("{}", 42)); + + memory_buffer out; + format_to(std::back_inserter(out), "The answer is {}.", 42); + EXPECT_EQ("The answer is 42.", to_string(out)); + + const char* filename = "nonexistent"; + FILE* ftest = safe_fopen(filename, "r"); + if (ftest) fclose(ftest); + int error_code = errno; + EXPECT_TRUE(ftest == nullptr); + EXPECT_SYSTEM_ERROR( + { + FILE* f = safe_fopen(filename, "r"); + if (!f) + throw fmt::system_error(errno, "Cannot open file '{}'", filename); + fclose(f); + }, + error_code, "Cannot open file 'nonexistent'"); + + EXPECT_EQ("First, thou shalt count to three", + fmt::format("First, thou shalt count to {0}", "three")); + EXPECT_EQ("Bring me a shrubbery", fmt::format("Bring me a {}", "shrubbery")); + EXPECT_EQ("From 1 to 3", fmt::format("From {} to {}", 1, 3)); + + char buffer[buffer_size]; + safe_sprintf(buffer, "%03.2f", -1.2); + EXPECT_EQ(buffer, fmt::format("{:03.2f}", -1.2)); + + EXPECT_EQ("a, b, c", fmt::format("{0}, {1}, {2}", 'a', 'b', 'c')); + EXPECT_EQ("a, b, c", fmt::format("{}, {}, {}", 'a', 'b', 'c')); + EXPECT_EQ("c, b, a", fmt::format("{2}, {1}, {0}", 'a', 'b', 'c')); + EXPECT_EQ("abracadabra", fmt::format("{0}{1}{0}", "abra", "cad")); + + EXPECT_EQ("left aligned ", + fmt::format("{:<30}", "left aligned")); + EXPECT_EQ(" right aligned", + fmt::format("{:>30}", "right aligned")); + EXPECT_EQ(" centered ", + fmt::format("{:^30}", "centered")); + EXPECT_EQ("***********centered***********", + fmt::format("{:*^30}", "centered")); + + EXPECT_EQ("+3.140000; -3.140000", fmt::format("{:+f}; {:+f}", 3.14, -3.14)); + EXPECT_EQ(" 3.140000; -3.140000", fmt::format("{: f}; {: f}", 3.14, -3.14)); + EXPECT_EQ("3.140000; -3.140000", fmt::format("{:-f}; {:-f}", 3.14, -3.14)); + + EXPECT_EQ("int: 42; hex: 2a; oct: 52", + fmt::format("int: {0:d}; hex: {0:x}; oct: {0:o}", 42)); + EXPECT_EQ("int: 42; hex: 0x2a; oct: 052", + fmt::format("int: {0:d}; hex: {0:#x}; oct: {0:#o}", 42)); + + EXPECT_EQ("The answer is 42", fmt::format("The answer is {}", 42)); + EXPECT_THROW_MSG( + (void)fmt::format(runtime("The answer is {:d}"), "forty-two"), + format_error, "invalid type specifier"); + + EXPECT_WRITE( + stdout, fmt::print("{}", std::numeric_limits<double>::infinity()), "inf"); +} + +TEST(format_test, print) { + EXPECT_WRITE(stdout, fmt::print("Don't {}!", "panic"), "Don't panic!"); + EXPECT_WRITE(stderr, fmt::print(stderr, "Don't {}!", "panic"), + "Don't panic!"); +} + +TEST(format_test, variadic) { + EXPECT_EQ("abc1", fmt::format("{}c{}", "ab", 1)); +} + +TEST(format_test, dynamic) { + using ctx = fmt::format_context; + auto args = std::vector<fmt::basic_format_arg<ctx>>(); + args.emplace_back(fmt::detail::make_arg<ctx>(42)); + args.emplace_back(fmt::detail::make_arg<ctx>("abc1")); + args.emplace_back(fmt::detail::make_arg<ctx>(1.5f)); + + std::string result = fmt::vformat( + "{} and {} and {}", + fmt::format_args(args.data(), static_cast<int>(args.size()))); + + EXPECT_EQ("42 and abc1 and 1.5", result); +} + +TEST(format_test, bytes) { + auto s = fmt::format("{:10}", fmt::bytes("ёжик")); + EXPECT_EQ("ёжик ", s); + EXPECT_EQ(10, s.size()); +} + +TEST(format_test, group_digits_view) { + EXPECT_EQ(fmt::format("{}", fmt::group_digits(10000000)), "10,000,000"); + EXPECT_EQ(fmt::format("{:8}", fmt::group_digits(1000)), " 1,000"); +} + +enum test_enum { foo, bar }; +auto format_as(test_enum e) -> int { return e; } + +TEST(format_test, join) { + using fmt::join; + int v1[3] = {1, 2, 3}; + auto v2 = std::vector<float>(); + v2.push_back(1.2f); + v2.push_back(3.4f); + void* v3[2] = {&v1[0], &v1[1]}; + + EXPECT_EQ("(1, 2, 3)", fmt::format("({})", join(v1, v1 + 3, ", "))); + EXPECT_EQ("(1)", fmt::format("({})", join(v1, v1 + 1, ", "))); + EXPECT_EQ("()", fmt::format("({})", join(v1, v1, ", "))); + EXPECT_EQ("(001, 002, 003)", fmt::format("({:03})", join(v1, v1 + 3, ", "))); + EXPECT_EQ("(+01.20, +03.40)", + fmt::format("({:+06.2f})", join(v2.begin(), v2.end(), ", "))); + + EXPECT_EQ("1, 2, 3", fmt::format("{0:{1}}", join(v1, v1 + 3, ", "), 1)); + + EXPECT_EQ(fmt::format("{}, {}", v3[0], v3[1]), + fmt::format("{}", join(v3, v3 + 2, ", "))); + + EXPECT_EQ("(1, 2, 3)", fmt::format("({})", join(v1, ", "))); + EXPECT_EQ("(+01.20, +03.40)", fmt::format("({:+06.2f})", join(v2, ", "))); + + auto v4 = std::vector<test_enum>{foo, bar, foo}; + EXPECT_EQ("0 1 0", fmt::format("{}", join(v4, " "))); +} + +#ifdef __cpp_lib_byte +TEST(format_test, format_byte) { + using arg_mapper = fmt::detail::arg_mapper<fmt::format_context>; + EXPECT_EQ(arg_mapper().map(std::byte(42)), 42); + EXPECT_EQ(fmt::format("{}", std::byte(42)), "42"); +} + +TEST(format_test, join_bytes) { + auto v = std::vector<std::byte>{std::byte(1), std::byte(2), std::byte(3)}; + EXPECT_EQ(fmt::format("{}", fmt::join(v, ", ")), "1, 2, 3"); +} +#endif + +std::string vformat_message(int id, const char* format, fmt::format_args args) { + auto buffer = fmt::memory_buffer(); + format_to(fmt::appender(buffer), "[{}] ", id); + vformat_to(fmt::appender(buffer), format, args); + return to_string(buffer); +} + +template <typename... Args> +std::string format_message(int id, const char* format, const Args&... args) { + auto va = fmt::make_format_args(args...); + return vformat_message(id, format, va); +} + +TEST(format_test, format_message_example) { + EXPECT_EQ("[42] something happened", + format_message(42, "{} happened", "something")); +} + +template <typename... Args> +void print_error(const char* file, int line, const char* format, + const Args&... args) { + fmt::print("{}: {}: ", file, line); + fmt::print(format, args...); +} + +TEST(format_test, unpacked_args) { + EXPECT_EQ("0123456789abcdefg", + fmt::format("{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}", 0, 1, 2, 3, 4, 5, + 6, 7, 8, 9, 'a', 'b', 'c', 'd', 'e', 'f', 'g')); +} + +struct string_like {}; +fmt::string_view to_string_view(string_like) { return "foo"; } + +constexpr char with_null[3] = {'{', '}', '\0'}; +constexpr char no_null[2] = {'{', '}'}; +static constexpr const char static_with_null[3] = {'{', '}', '\0'}; +static constexpr const char static_no_null[2] = {'{', '}'}; + +TEST(format_test, compile_time_string) { + EXPECT_EQ("foo", fmt::format(FMT_STRING("foo"))); + EXPECT_EQ("42", fmt::format(FMT_STRING("{}"), 42)); + EXPECT_EQ("foo", fmt::format(FMT_STRING("{}"), string_like())); + +#if FMT_USE_NONTYPE_TEMPLATE_ARGS + using namespace fmt::literals; + EXPECT_EQ("foobar", fmt::format(FMT_STRING("{foo}{bar}"), "bar"_a = "bar", + "foo"_a = "foo")); + EXPECT_EQ("", fmt::format(FMT_STRING(""))); + EXPECT_EQ("", fmt::format(FMT_STRING(""), "arg"_a = 42)); + EXPECT_EQ("42", fmt::format(FMT_STRING("{answer}"), "answer"_a = Answer())); +#endif + + (void)static_with_null; + (void)static_no_null; +#ifndef _MSC_VER + EXPECT_EQ("42", fmt::format(FMT_STRING(static_with_null), 42)); + EXPECT_EQ("42", fmt::format(FMT_STRING(static_no_null), 42)); +#endif + + (void)with_null; + (void)no_null; +#if FMT_CPLUSPLUS >= 201703L + EXPECT_EQ("42", fmt::format(FMT_STRING(with_null), 42)); + EXPECT_EQ("42", fmt::format(FMT_STRING(no_null), 42)); +#endif +#if defined(FMT_USE_STRING_VIEW) && FMT_CPLUSPLUS >= 201703L + EXPECT_EQ("42", fmt::format(FMT_STRING(std::string_view("{}")), 42)); +#endif +} + +TEST(format_test, custom_format_compile_time_string) { + EXPECT_EQ("42", fmt::format(FMT_STRING("{}"), Answer())); + auto answer = Answer(); + EXPECT_EQ("42", fmt::format(FMT_STRING("{}"), answer)); + char buf[10] = {}; + fmt::format_to(buf, FMT_STRING("{}"), answer); + const Answer const_answer = Answer(); + EXPECT_EQ("42", fmt::format(FMT_STRING("{}"), const_answer)); +} + +#if FMT_USE_USER_DEFINED_LITERALS +TEST(format_test, named_arg_udl) { + using namespace fmt::literals; + auto udl_a = fmt::format("{first}{second}{first}{third}", "first"_a = "abra", + "second"_a = "cad", "third"_a = 99); + EXPECT_EQ( + fmt::format("{first}{second}{first}{third}", fmt::arg("first", "abra"), + fmt::arg("second", "cad"), fmt::arg("third", 99)), + udl_a); + + EXPECT_EQ("42", fmt::format("{answer}", "answer"_a = Answer())); +} +#endif // FMT_USE_USER_DEFINED_LITERALS + +TEST(format_test, enum) { EXPECT_EQ("0", fmt::format("{}", foo)); } + +TEST(format_test, formatter_not_specialized) { + static_assert(!fmt::has_formatter<fmt::formatter<test_enum>, + fmt::format_context>::value, + ""); +} + +#if FMT_HAS_FEATURE(cxx_strong_enums) +enum big_enum : unsigned long long { big_enum_value = 5000000000ULL }; +auto format_as(big_enum e) -> unsigned long long { return e; } + +TEST(format_test, strong_enum) { + EXPECT_EQ("5000000000", fmt::format("{}", big_enum_value)); +} +#endif + +TEST(format_test, non_null_terminated_format_string) { + EXPECT_EQ("42", fmt::format(string_view("{}foo", 2), 42)); +} + +struct variant { + enum { int_type, string_type } type; + explicit variant(int) : type(int_type) {} + explicit variant(const char*) : type(string_type) {} +}; + +FMT_BEGIN_NAMESPACE +template <> struct formatter<variant> : dynamic_formatter<> { + auto format(variant value, format_context& ctx) -> decltype(ctx.out()) { + if (value.type == variant::int_type) + return dynamic_formatter<>::format(42, ctx); + return dynamic_formatter<>::format("foo", ctx); + } +}; +FMT_END_NAMESPACE + +TEST(format_test, dynamic_formatter) { + auto num = variant(42); + auto str = variant("foo"); + EXPECT_EQ("42", fmt::format("{:d}", num)); + EXPECT_EQ("foo", fmt::format("{:s}", str)); + EXPECT_EQ(" 42 foo ", fmt::format("{:{}} {:{}}", num, 3, str, 4)); + EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{}}"), num), format_error, + "cannot switch from manual to automatic argument indexing"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{:{0}}"), num), format_error, + "cannot switch from automatic to manual argument indexing"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{:+}"), str), format_error, + "format specifier requires numeric argument"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{:-}"), str), format_error, + "format specifier requires numeric argument"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{: }"), str), format_error, + "format specifier requires numeric argument"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{:#}"), str), format_error, + "format specifier requires numeric argument"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{:0}"), str), format_error, + "format specifier requires numeric argument"); + EXPECT_THROW_MSG((void)fmt::format(runtime("{:.2}"), num), format_error, + "precision not allowed for this argument type"); +} + +namespace adl_test { +namespace fmt { +namespace detail { +struct foo {}; +template <typename, typename OutputIt> void write(OutputIt, foo) = delete; +} // namespace detail +} // namespace fmt +} // namespace adl_test + +FMT_BEGIN_NAMESPACE +template <> +struct formatter<adl_test::fmt::detail::foo> : formatter<std::string> { + template <typename FormatContext> + auto format(adl_test::fmt::detail::foo, FormatContext& ctx) + -> decltype(ctx.out()) { + return formatter<std::string>::format("foo", ctx); + } +}; +FMT_END_NAMESPACE + +struct convertible_to_int { + operator int() const { return value; } + + int value = 42; +}; + +TEST(format_test, to_string) { + EXPECT_EQ(fmt::to_string(42), "42"); + EXPECT_EQ(fmt::to_string(reinterpret_cast<void*>(0x1234)), "0x1234"); + EXPECT_EQ(fmt::to_string(adl_test::fmt::detail::foo()), "foo"); + EXPECT_EQ(fmt::to_string(convertible_to_int()), "42"); + EXPECT_EQ(fmt::to_string(foo), "0"); + +#if FMT_USE_FLOAT128 + EXPECT_EQ(fmt::to_string(__float128(0.5)), "0.5"); +#endif +} + +TEST(format_test, output_iterators) { + std::list<char> out; + fmt::format_to(std::back_inserter(out), "{}", 42); + EXPECT_EQ("42", std::string(out.begin(), out.end())); + std::stringstream s; + fmt::format_to(std::ostream_iterator<char>(s), "{}", 42); + EXPECT_EQ("42", s.str()); +} + +TEST(format_test, formatted_size) { + EXPECT_EQ(2u, fmt::formatted_size("{}", 42)); +} + +TEST(format_test, format_to_no_args) { + std::string s; + fmt::format_to(std::back_inserter(s), "test"); + EXPECT_EQ("test", s); +} + +TEST(format_test, format_to) { + std::string s; + fmt::format_to(std::back_inserter(s), "part{0}", 1); + EXPECT_EQ("part1", s); + fmt::format_to(std::back_inserter(s), "part{0}", 2); + EXPECT_EQ("part1part2", s); +} + +TEST(format_test, format_to_memory_buffer) { + auto buf = fmt::basic_memory_buffer<char, 100>(); + fmt::format_to(fmt::appender(buf), "{}", "foo"); + EXPECT_EQ("foo", to_string(buf)); +} + +TEST(format_test, format_to_vector) { + std::vector<char> v; + fmt::format_to(std::back_inserter(v), "{}", "foo"); + EXPECT_EQ(string_view(v.data(), v.size()), "foo"); +} + +struct nongrowing_container { + using value_type = char; + void push_back(char) { throw std::runtime_error("can't take it any more"); } +}; + +TEST(format_test, format_to_propagates_exceptions) { + auto c = nongrowing_container(); + EXPECT_THROW(fmt::format_to(std::back_inserter(c), "{}", 42), + std::runtime_error); +} + +TEST(format_test, format_to_n) { + char buffer[4]; + buffer[3] = 'x'; + auto result = fmt::format_to_n(buffer, 3, "{}", 12345); + EXPECT_EQ(5u, result.size); + EXPECT_EQ(buffer + 3, result.out); + EXPECT_EQ("123x", fmt::string_view(buffer, 4)); + + result = fmt::format_to_n(buffer, 3, "{:s}", "foobar"); + EXPECT_EQ(6u, result.size); + EXPECT_EQ(buffer + 3, result.out); + EXPECT_EQ("foox", fmt::string_view(buffer, 4)); + + buffer[0] = 'x'; + buffer[1] = 'x'; + buffer[2] = 'x'; + result = fmt::format_to_n(buffer, 3, "{}", 'A'); + EXPECT_EQ(1u, result.size); + EXPECT_EQ(buffer + 1, result.out); + EXPECT_EQ("Axxx", fmt::string_view(buffer, 4)); + + result = fmt::format_to_n(buffer, 3, "{}{} ", 'B', 'C'); + EXPECT_EQ(3u, result.size); + EXPECT_EQ(buffer + 3, result.out); + EXPECT_EQ("BC x", fmt::string_view(buffer, 4)); + + result = fmt::format_to_n(buffer, 4, "{}", "ABCDE"); + EXPECT_EQ(5u, result.size); + EXPECT_EQ("ABCD", fmt::string_view(buffer, 4)); + + buffer[3] = 'x'; + result = fmt::format_to_n(buffer, 3, "{}", std::string(1000, '*')); + EXPECT_EQ(1000u, result.size); + EXPECT_EQ("***x", fmt::string_view(buffer, 4)); +} + +struct test_output_iterator { + char* data; + + using iterator_category = std::output_iterator_tag; + using value_type = void; + using difference_type = void; + using pointer = void; + using reference = void; + + test_output_iterator& operator++() { + ++data; + return *this; + } + test_output_iterator operator++(int) { + auto tmp = *this; + ++data; + return tmp; + } + char& operator*() { return *data; } +}; + +TEST(format_test, format_to_n_output_iterator) { + char buf[10] = {}; + fmt::format_to_n(test_output_iterator{buf}, 10, "{}", 42); + EXPECT_STREQ(buf, "42"); +} + +#if FMT_USE_CONSTEXPR +struct test_error_handler { + const char*& error; + + FMT_CONSTEXPR test_error_handler(const char*& err) : error(err) {} + + FMT_CONSTEXPR test_error_handler(const test_error_handler& other) + : error(other.error) {} + + FMT_CONSTEXPR void on_error(const char* message) { + if (!error) error = message; + } +}; + +FMT_CONSTEXPR size_t len(const char* s) { + size_t len = 0; + while (*s++) ++len; + return len; +} + +FMT_CONSTEXPR bool equal(const char* s1, const char* s2) { + if (!s1 || !s2) return s1 == s2; + while (*s1 && *s1 == *s2) { + ++s1; + ++s2; + } + return *s1 == *s2; +} + +template <typename... Args> +FMT_CONSTEXPR bool test_error(const char* fmt, const char* expected_error) { + const char* actual_error = nullptr; + auto s = string_view(fmt, len(fmt)); + auto checker = + fmt::detail::format_string_checker<char, test_error_handler, Args...>( + s, test_error_handler(actual_error)); + fmt::detail::parse_format_string<true>(s, checker); + return equal(actual_error, expected_error); +} + +# define EXPECT_ERROR_NOARGS(fmt, error) \ + static_assert(test_error(fmt, error), "") +# define EXPECT_ERROR(fmt, error, ...) \ + static_assert(test_error<__VA_ARGS__>(fmt, error), "") + +TEST(format_test, format_string_errors) { + EXPECT_ERROR_NOARGS("foo", nullptr); + EXPECT_ERROR_NOARGS("}", "unmatched '}' in format string"); + EXPECT_ERROR("{0:s", "unknown format specifier", date); +# if !FMT_MSC_VERSION || FMT_MSC_VERSION >= 1916 + // This causes an detail compiler error in MSVC2017. + EXPECT_ERROR("{:{<}", "invalid fill character '{'", int); + EXPECT_ERROR("{:10000000000}", "number is too big", int); + EXPECT_ERROR("{:.10000000000}", "number is too big", int); + EXPECT_ERROR_NOARGS("{:x}", "argument not found"); + EXPECT_ERROR("{:+}", "format specifier requires numeric argument", + const char*); + EXPECT_ERROR("{:-}", "format specifier requires numeric argument", + const char*); + EXPECT_ERROR("{:#}", "format specifier requires numeric argument", + const char*); + EXPECT_ERROR("{: }", "format specifier requires numeric argument", + const char*); + EXPECT_ERROR("{:0}", "format specifier requires numeric argument", + const char*); + EXPECT_ERROR("{:+}", "format specifier requires signed argument", unsigned); + EXPECT_ERROR("{:-}", "format specifier requires signed argument", unsigned); + EXPECT_ERROR("{: }", "format specifier requires signed argument", unsigned); + EXPECT_ERROR("{:{}}", "argument not found", int); + EXPECT_ERROR("{:.{}}", "argument not found", double); + EXPECT_ERROR("{:{}}", "width/precision is not integer", int, double); + EXPECT_ERROR("{:.2}", "precision not allowed for this argument type", int); + EXPECT_ERROR("{:s}", "invalid type specifier", int); + EXPECT_ERROR("{:s}", "invalid type specifier", char); + EXPECT_ERROR("{:+}", "invalid format specifier for char", char); + EXPECT_ERROR("{:s}", "invalid type specifier", double); + EXPECT_ERROR("{:d}", "invalid type specifier", const char*); + EXPECT_ERROR("{:d}", "invalid type specifier", std::string); + EXPECT_ERROR("{:s}", "invalid type specifier", void*); +# else + fmt::print("warning: constexpr is broken in this version of MSVC\n"); +# endif +# if FMT_USE_NONTYPE_TEMPLATE_ARGS + using namespace fmt::literals; + EXPECT_ERROR("{foo}", "named argument is not found", decltype("bar"_a = 42)); + EXPECT_ERROR("{foo}", "named argument is not found", + decltype(fmt::arg("foo", 42))); +# else + EXPECT_ERROR("{foo}", + "compile-time checks for named arguments require C++20 support", + int); +# endif + EXPECT_ERROR_NOARGS("{10000000000}", "argument not found"); + EXPECT_ERROR_NOARGS("{0x}", "invalid format string"); + EXPECT_ERROR_NOARGS("{-}", "invalid format string"); + EXPECT_ERROR("{:{0x}}", "invalid format string", int); + EXPECT_ERROR("{:{-}}", "invalid format string", int); + EXPECT_ERROR("{:.{0x}}", "invalid format string", int); + EXPECT_ERROR("{:.{-}}", "invalid format string", int); + EXPECT_ERROR("{:.x}", "missing precision specifier", int); + EXPECT_ERROR_NOARGS("{}", "argument not found"); + EXPECT_ERROR("{1}", "argument not found", int); + EXPECT_ERROR("{1}{}", + "cannot switch from manual to automatic argument indexing", int, + int); + EXPECT_ERROR("{}{1}", + "cannot switch from automatic to manual argument indexing", int, + int); +} + +TEST(format_test, vformat_to) { + using context = fmt::format_context; + fmt::basic_format_arg<context> arg = fmt::detail::make_arg<context>(42); + auto args = fmt::basic_format_args<context>(&arg, 1); + auto s = std::string(); + fmt::vformat_to(std::back_inserter(s), "{}", args); + EXPECT_EQ("42", s); + s.clear(); + fmt::vformat_to(std::back_inserter(s), FMT_STRING("{}"), args); + EXPECT_EQ("42", s); +} + +#endif // FMT_USE_CONSTEXPR + +TEST(format_test, char_traits_is_not_ambiguous) { + // Test that we don't inject detail names into the std namespace. + using namespace std; + auto c = char_traits<char>::char_type(); + (void)c; +#if FMT_CPLUSPLUS >= 201103L + auto s = std::string(); + auto lval = begin(s); + (void)lval; +#endif +} + +struct check_back_appender {}; + +FMT_BEGIN_NAMESPACE +template <> struct formatter<check_back_appender> { + auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) { + return ctx.begin(); + } + + template <typename Context> + auto format(check_back_appender, Context& ctx) -> decltype(ctx.out()) { + auto out = ctx.out(); + static_assert(std::is_same<decltype(++out), decltype(out)&>::value, + "needs to satisfy weakly_incrementable"); + *out = 'y'; + return ++out; + } +}; +FMT_END_NAMESPACE + +TEST(format_test, back_insert_slicing) { + EXPECT_EQ(fmt::format("{}", check_back_appender{}), "y"); +} + +template <typename Char, typename T> bool check_enabled_formatter() { + static_assert(std::is_default_constructible<fmt::formatter<T, Char>>::value, + ""); + return true; +} + +template <typename Char, typename... T> void check_enabled_formatters() { + auto dummy = {check_enabled_formatter<Char, T>()...}; + (void)dummy; +} + +TEST(format_test, test_formatters_enabled) { + check_enabled_formatters<char, bool, char, signed char, unsigned char, short, + unsigned short, int, unsigned, long, unsigned long, + long long, unsigned long long, float, double, + long double, void*, const void*, char*, const char*, + std::string, std::nullptr_t>(); + check_enabled_formatters<wchar_t, bool, wchar_t, signed char, unsigned char, + short, unsigned short, int, unsigned, long, + unsigned long, long long, unsigned long long, float, + double, long double, void*, const void*, wchar_t*, + const wchar_t*, std::wstring, std::nullptr_t>(); +} + +TEST(format_int_test, data) { + fmt::format_int format_int(42); + EXPECT_EQ("42", std::string(format_int.data(), format_int.size())); +} + +TEST(format_int_test, format_int) { + EXPECT_EQ("42", fmt::format_int(42).str()); + EXPECT_EQ(2u, fmt::format_int(42).size()); + EXPECT_EQ("-42", fmt::format_int(-42).str()); + EXPECT_EQ(3u, fmt::format_int(-42).size()); + EXPECT_EQ("42", fmt::format_int(42ul).str()); + EXPECT_EQ("-42", fmt::format_int(-42l).str()); + EXPECT_EQ("42", fmt::format_int(42ull).str()); + EXPECT_EQ("-42", fmt::format_int(-42ll).str()); + std::ostringstream os; + os << max_value<int64_t>(); + EXPECT_EQ(os.str(), fmt::format_int(max_value<int64_t>()).str()); +} |