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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:54:28 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:54:28 +0000 |
commit | e6918187568dbd01842d8d1d2c808ce16a894239 (patch) | |
tree | 64f88b554b444a49f656b6c656111a145cbbaa28 /src/fmt/test/core-test.cc | |
parent | Initial commit. (diff) | |
download | ceph-upstream/18.2.2.tar.xz ceph-upstream/18.2.2.zip |
Adding upstream version 18.2.2.upstream/18.2.2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/fmt/test/core-test.cc | 978 |
1 files changed, 978 insertions, 0 deletions
diff --git a/src/fmt/test/core-test.cc b/src/fmt/test/core-test.cc new file mode 100644 index 000000000..c76dc1617 --- /dev/null +++ b/src/fmt/test/core-test.cc @@ -0,0 +1,978 @@ +// Formatting library for C++ - core tests +// +// Copyright (c) 2012 - present, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +// clang-format off +#include "test-assert.h" +// clang-format on + +#define I 42 // simulate https://en.cppreference.com/w/c/numeric/complex/I +#include "fmt/core.h" +#undef I + +#include <algorithm> // std::copy_n +#include <climits> // INT_MAX +#include <cstring> // std::strlen +#include <functional> // std::equal_to +#include <iterator> // std::back_insert_iterator +#include <limits> // std::numeric_limits +#include <string> // std::string +#include <type_traits> // std::is_same + +#include "gmock/gmock.h" + +using fmt::string_view; +using fmt::detail::buffer; + +using testing::_; +using testing::Invoke; +using testing::Return; + +#ifdef FMT_FORMAT_H_ +# error core-test includes format.h +#endif + +TEST(string_view_test, value_type) { + static_assert(std::is_same<string_view::value_type, char>::value, ""); +} + +TEST(string_view_test, ctor) { + EXPECT_STREQ("abc", fmt::string_view("abc").data()); + EXPECT_EQ(3u, fmt::string_view("abc").size()); + + EXPECT_STREQ("defg", fmt::string_view(std::string("defg")).data()); + EXPECT_EQ(4u, fmt::string_view(std::string("defg")).size()); +} + +TEST(string_view_test, length) { + // Test that string_view::size() returns string length, not buffer size. + char str[100] = "some string"; + EXPECT_EQ(std::strlen(str), string_view(str).size()); + EXPECT_LT(std::strlen(str), sizeof(str)); +} + +// Check string_view's comparison operator. +template <template <typename> class Op> void check_op() { + const char* inputs[] = {"foo", "fop", "fo"}; + size_t num_inputs = sizeof(inputs) / sizeof(*inputs); + for (size_t i = 0; i < num_inputs; ++i) { + for (size_t j = 0; j < num_inputs; ++j) { + string_view lhs(inputs[i]), rhs(inputs[j]); + EXPECT_EQ(Op<int>()(lhs.compare(rhs), 0), Op<string_view>()(lhs, rhs)); + } + } +} + +TEST(string_view_test, compare) { + EXPECT_EQ(string_view("foo").compare(string_view("foo")), 0); + EXPECT_GT(string_view("fop").compare(string_view("foo")), 0); + EXPECT_LT(string_view("foo").compare(string_view("fop")), 0); + EXPECT_GT(string_view("foo").compare(string_view("fo")), 0); + EXPECT_LT(string_view("fo").compare(string_view("foo")), 0); + check_op<std::equal_to>(); + check_op<std::not_equal_to>(); + check_op<std::less>(); + check_op<std::less_equal>(); + check_op<std::greater>(); + check_op<std::greater_equal>(); +} + +namespace test_ns { +template <typename Char> class test_string { + private: + std::basic_string<Char> s_; + + public: + test_string(const Char* s) : s_(s) {} + const Char* data() const { return s_.data(); } + size_t length() const { return s_.size(); } + operator const Char*() const { return s_.c_str(); } +}; + +template <typename Char> +fmt::basic_string_view<Char> to_string_view(const test_string<Char>& s) { + return {s.data(), s.length()}; +} +} // namespace test_ns + +TEST(core_test, is_output_iterator) { + EXPECT_TRUE((fmt::detail::is_output_iterator<char*, char>::value)); + EXPECT_FALSE((fmt::detail::is_output_iterator<const char*, char>::value)); + EXPECT_FALSE((fmt::detail::is_output_iterator<std::string, char>::value)); + EXPECT_TRUE( + (fmt::detail::is_output_iterator<std::back_insert_iterator<std::string>, + char>::value)); + EXPECT_TRUE( + (fmt::detail::is_output_iterator<std::string::iterator, char>::value)); + EXPECT_FALSE((fmt::detail::is_output_iterator<std::string::const_iterator, + char>::value)); +} + +TEST(core_test, buffer_appender) { + // back_insert_iterator is not default-constructible before C++20, so + // buffer_appender can only be default-constructible when back_insert_iterator + // is. + static_assert( + std::is_default_constructible< + std::back_insert_iterator<fmt::detail::buffer<char>>>::value == + std::is_default_constructible< + fmt::detail::buffer_appender<char>>::value, + ""); + +#ifdef __cpp_lib_ranges + static_assert(std::output_iterator<fmt::detail::buffer_appender<char>, char>); +#endif +} + +#if !FMT_GCC_VERSION || FMT_GCC_VERSION >= 470 +TEST(buffer_test, noncopyable) { + EXPECT_FALSE(std::is_copy_constructible<buffer<char>>::value); +# if !FMT_MSC_VERSION + // std::is_copy_assignable is broken in MSVC2013. + EXPECT_FALSE(std::is_copy_assignable<buffer<char>>::value); +# endif +} + +TEST(buffer_test, nonmoveable) { + EXPECT_FALSE(std::is_move_constructible<buffer<char>>::value); +# if !FMT_MSC_VERSION + // std::is_move_assignable is broken in MSVC2013. + EXPECT_FALSE(std::is_move_assignable<buffer<char>>::value); +# endif +} +#endif + +TEST(buffer_test, indestructible) { + static_assert(!std::is_destructible<fmt::detail::buffer<int>>(), + "buffer's destructor is protected"); +} + +template <typename T> struct mock_buffer final : buffer<T> { + MOCK_METHOD1(do_grow, size_t(size_t capacity)); + + void grow(size_t capacity) override { + this->set(this->data(), do_grow(capacity)); + } + + mock_buffer(T* data = nullptr, size_t buf_capacity = 0) { + this->set(data, buf_capacity); + ON_CALL(*this, do_grow(_)).WillByDefault(Invoke([](size_t capacity) { + return capacity; + })); + } +}; + +TEST(buffer_test, ctor) { + { + mock_buffer<int> buffer; + EXPECT_EQ(nullptr, buffer.data()); + EXPECT_EQ(static_cast<size_t>(0), buffer.size()); + EXPECT_EQ(static_cast<size_t>(0), buffer.capacity()); + } + { + int dummy; + mock_buffer<int> buffer(&dummy); + EXPECT_EQ(&dummy, &buffer[0]); + EXPECT_EQ(static_cast<size_t>(0), buffer.size()); + EXPECT_EQ(static_cast<size_t>(0), buffer.capacity()); + } + { + int dummy; + size_t capacity = std::numeric_limits<size_t>::max(); + mock_buffer<int> buffer(&dummy, capacity); + EXPECT_EQ(&dummy, &buffer[0]); + EXPECT_EQ(static_cast<size_t>(0), buffer.size()); + EXPECT_EQ(capacity, buffer.capacity()); + } +} + +TEST(buffer_test, access) { + char data[10]; + mock_buffer<char> buffer(data, sizeof(data)); + buffer[0] = 11; + EXPECT_EQ(11, buffer[0]); + buffer[3] = 42; + EXPECT_EQ(42, *(&buffer[0] + 3)); + const fmt::detail::buffer<char>& const_buffer = buffer; + EXPECT_EQ(42, const_buffer[3]); +} + +TEST(buffer_test, try_resize) { + char data[123]; + mock_buffer<char> buffer(data, sizeof(data)); + buffer[10] = 42; + EXPECT_EQ(42, buffer[10]); + buffer.try_resize(20); + EXPECT_EQ(20u, buffer.size()); + EXPECT_EQ(123u, buffer.capacity()); + EXPECT_EQ(42, buffer[10]); + buffer.try_resize(5); + EXPECT_EQ(5u, buffer.size()); + EXPECT_EQ(123u, buffer.capacity()); + EXPECT_EQ(42, buffer[10]); + // Check if try_resize calls grow. + EXPECT_CALL(buffer, do_grow(124)); + buffer.try_resize(124); + EXPECT_CALL(buffer, do_grow(200)); + buffer.try_resize(200); +} + +TEST(buffer_test, try_resize_partial) { + char data[10]; + mock_buffer<char> buffer(data, sizeof(data)); + EXPECT_CALL(buffer, do_grow(20)).WillOnce(Return(15)); + buffer.try_resize(20); + EXPECT_EQ(buffer.capacity(), 15); + EXPECT_EQ(buffer.size(), 15); +} + +TEST(buffer_test, clear) { + mock_buffer<char> buffer; + EXPECT_CALL(buffer, do_grow(20)); + buffer.try_resize(20); + buffer.try_resize(0); + EXPECT_EQ(static_cast<size_t>(0), buffer.size()); + EXPECT_EQ(20u, buffer.capacity()); +} + +TEST(buffer_test, append) { + char data[15]; + mock_buffer<char> buffer(data, 10); + auto test = "test"; + buffer.append(test, test + 5); + EXPECT_STREQ(test, &buffer[0]); + EXPECT_EQ(5u, buffer.size()); + buffer.try_resize(10); + EXPECT_CALL(buffer, do_grow(12)); + buffer.append(test, test + 2); + EXPECT_EQ('t', buffer[10]); + EXPECT_EQ('e', buffer[11]); + EXPECT_EQ(12u, buffer.size()); +} + +TEST(buffer_test, append_partial) { + char data[10]; + mock_buffer<char> buffer(data, sizeof(data)); + testing::InSequence seq; + EXPECT_CALL(buffer, do_grow(15)).WillOnce(Return(10)); + EXPECT_CALL(buffer, do_grow(15)).WillOnce(Invoke([&buffer](size_t) { + EXPECT_EQ(fmt::string_view(buffer.data(), buffer.size()), "0123456789"); + buffer.clear(); + return 10; + })); + auto test = "0123456789abcde"; + buffer.append(test, test + 15); +} + +TEST(buffer_test, append_allocates_enough_storage) { + char data[19]; + mock_buffer<char> buffer(data, 10); + auto test = "abcdefgh"; + buffer.try_resize(10); + EXPECT_CALL(buffer, do_grow(19)); + buffer.append(test, test + 9); +} + +struct custom_context { + using char_type = char; + using parse_context_type = fmt::format_parse_context; + + bool called = false; + + template <typename T> struct formatter_type { + auto parse(fmt::format_parse_context& ctx) -> decltype(ctx.begin()) { + return ctx.begin(); + } + + const char* format(const T&, custom_context& ctx) { + ctx.called = true; + return nullptr; + } + }; + + void advance_to(const char*) {} +}; + +struct test_struct {}; + +FMT_BEGIN_NAMESPACE +template <typename Char> struct formatter<test_struct, Char> { + auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) { + return ctx.begin(); + } + + auto format(test_struct, format_context& ctx) -> decltype(ctx.out()) { + auto test = string_view("test"); + return std::copy_n(test.data(), test.size(), ctx.out()); + } +}; +FMT_END_NAMESPACE + +TEST(arg_test, format_args) { + auto args = fmt::format_args(); + EXPECT_FALSE(args.get(1)); +} + +TEST(arg_test, make_value_with_custom_context) { + auto t = test_struct(); + fmt::detail::value<custom_context> arg( + fmt::detail::arg_mapper<custom_context>().map(t)); + auto ctx = custom_context(); + auto parse_ctx = fmt::format_parse_context(""); + arg.custom.format(&t, parse_ctx, ctx); + EXPECT_TRUE(ctx.called); +} + +// Use a unique result type to make sure that there are no undesirable +// conversions. +struct test_result {}; + +template <typename T> struct mock_visitor { + template <typename U> struct result { using type = test_result; }; + + mock_visitor() { + ON_CALL(*this, visit(_)).WillByDefault(Return(test_result())); + } + + MOCK_METHOD1_T(visit, test_result(T value)); + MOCK_METHOD0_T(unexpected, void()); + + test_result operator()(T value) { return visit(value); } + + template <typename U> test_result operator()(U) { + unexpected(); + return test_result(); + } +}; + +template <typename T> struct visit_type { using type = T; }; + +#define VISIT_TYPE(type_, visit_type_) \ + template <> struct visit_type<type_> { using type = visit_type_; } + +VISIT_TYPE(signed char, int); +VISIT_TYPE(unsigned char, unsigned); +VISIT_TYPE(short, int); +VISIT_TYPE(unsigned short, unsigned); + +#if LONG_MAX == INT_MAX +VISIT_TYPE(long, int); +VISIT_TYPE(unsigned long, unsigned); +#else +VISIT_TYPE(long, long long); +VISIT_TYPE(unsigned long, unsigned long long); +#endif + +#define CHECK_ARG(Char, expected, value) \ + { \ + testing::StrictMock<mock_visitor<decltype(expected)>> visitor; \ + EXPECT_CALL(visitor, visit(expected)); \ + using iterator = std::back_insert_iterator<buffer<Char>>; \ + fmt::visit_format_arg( \ + visitor, \ + fmt::detail::make_arg<fmt::basic_format_context<iterator, Char>>( \ + value)); \ + } + +#define CHECK_ARG_SIMPLE(value) \ + { \ + using value_type = decltype(value); \ + typename visit_type<value_type>::type expected = value; \ + CHECK_ARG(char, expected, value) \ + CHECK_ARG(wchar_t, expected, value) \ + } + +template <typename T> class numeric_arg_test : public testing::Test {}; + +using test_types = + testing::Types<bool, signed char, unsigned char, short, unsigned short, int, + unsigned, long, unsigned long, long long, unsigned long long, + float, double, long double>; +TYPED_TEST_SUITE(numeric_arg_test, test_types); + +template <typename T, fmt::enable_if_t<std::is_integral<T>::value, int> = 0> +T test_value() { + return static_cast<T>(42); +} + +template <typename T, + fmt::enable_if_t<std::is_floating_point<T>::value, int> = 0> +T test_value() { + return static_cast<T>(4.2); +} + +TYPED_TEST(numeric_arg_test, make_and_visit) { + CHECK_ARG_SIMPLE(test_value<TypeParam>()); + CHECK_ARG_SIMPLE(std::numeric_limits<TypeParam>::min()); + CHECK_ARG_SIMPLE(std::numeric_limits<TypeParam>::max()); +} + +TEST(arg_test, char_arg) { CHECK_ARG(char, 'a', 'a'); } + +TEST(arg_test, string_arg) { + char str_data[] = "test"; + char* str = str_data; + const char* cstr = str; + CHECK_ARG(char, cstr, str); + + auto sv = fmt::string_view(str); + CHECK_ARG(char, sv, std::string(str)); +} + +TEST(arg_test, wstring_arg) { + wchar_t str_data[] = L"test"; + wchar_t* str = str_data; + const wchar_t* cstr = str; + + auto sv = fmt::basic_string_view<wchar_t>(str); + CHECK_ARG(wchar_t, cstr, str); + CHECK_ARG(wchar_t, cstr, cstr); + CHECK_ARG(wchar_t, sv, std::wstring(str)); + CHECK_ARG(wchar_t, sv, fmt::basic_string_view<wchar_t>(str)); +} + +TEST(arg_test, pointer_arg) { + void* p = nullptr; + const void* cp = nullptr; + CHECK_ARG(char, cp, p); + CHECK_ARG(wchar_t, cp, p); + CHECK_ARG_SIMPLE(cp); +} + +struct check_custom { + test_result operator()( + fmt::basic_format_arg<fmt::format_context>::handle h) const { + struct test_buffer final : fmt::detail::buffer<char> { + char data[10]; + test_buffer() : fmt::detail::buffer<char>(data, 0, 10) {} + void grow(size_t) override {} + } buffer; + auto parse_ctx = fmt::format_parse_context(""); + auto ctx = fmt::format_context(fmt::detail::buffer_appender<char>(buffer), + fmt::format_args()); + h.format(parse_ctx, ctx); + EXPECT_EQ("test", std::string(buffer.data, buffer.size())); + return test_result(); + } +}; + +TEST(arg_test, custom_arg) { + auto test = test_struct(); + using visitor = + mock_visitor<fmt::basic_format_arg<fmt::format_context>::handle>; + testing::StrictMock<visitor> v; + EXPECT_CALL(v, visit(_)).WillOnce(Invoke(check_custom())); + fmt::visit_format_arg(v, fmt::detail::make_arg<fmt::format_context>(test)); +} + +TEST(arg_test, visit_invalid_arg) { + testing::StrictMock<mock_visitor<fmt::monostate>> visitor; + EXPECT_CALL(visitor, visit(_)); + auto arg = fmt::basic_format_arg<fmt::format_context>(); + fmt::visit_format_arg(visitor, arg); +} + +#if FMT_USE_CONSTEXPR + +enum class arg_id_result { none, empty, index, name, error }; +struct test_arg_id_handler { + arg_id_result res = arg_id_result::none; + int index = 0; + string_view name; + + constexpr void operator()() { res = arg_id_result::empty; } + + constexpr void operator()(int i) { + res = arg_id_result::index; + index = i; + } + + constexpr void operator()(string_view n) { + res = arg_id_result::name; + name = n; + } + + constexpr void on_error(const char*) { res = arg_id_result::error; } +}; + +template <size_t N> +constexpr test_arg_id_handler parse_arg_id(const char (&s)[N]) { + test_arg_id_handler h; + fmt::detail::parse_arg_id(s, s + N, h); + return h; +} + +TEST(format_test, constexpr_parse_arg_id) { + static_assert(parse_arg_id(":").res == arg_id_result::empty, ""); + static_assert(parse_arg_id("}").res == arg_id_result::empty, ""); + static_assert(parse_arg_id("42:").res == arg_id_result::index, ""); + static_assert(parse_arg_id("42:").index == 42, ""); + static_assert(parse_arg_id("foo:").res == arg_id_result::name, ""); + static_assert(parse_arg_id("foo:").name.size() == 3, ""); + static_assert(parse_arg_id("!").res == arg_id_result::error, ""); +} + +struct test_format_specs_handler { + enum result { none, hash, zero, loc, error }; + result res = none; + + fmt::align_t alignment = fmt::align::none; + fmt::sign_t sign = fmt::sign::none; + char fill = 0; + int width = 0; + fmt::detail::arg_ref<char> width_ref; + int precision = 0; + fmt::detail::arg_ref<char> precision_ref; + fmt::presentation_type type = fmt::presentation_type::none; + + // Workaround for MSVC2017 bug that results in "expression did not evaluate + // to a constant" with compiler-generated copy ctor. + constexpr test_format_specs_handler() {} + constexpr test_format_specs_handler(const test_format_specs_handler& other) = + default; + + constexpr void on_align(fmt::align_t a) { alignment = a; } + constexpr void on_fill(fmt::string_view f) { fill = f[0]; } + constexpr void on_sign(fmt::sign_t s) { sign = s; } + constexpr void on_hash() { res = hash; } + constexpr void on_zero() { res = zero; } + constexpr void on_localized() { res = loc; } + + constexpr void on_width(int w) { width = w; } + constexpr void on_dynamic_width(fmt::detail::auto_id) {} + constexpr void on_dynamic_width(int index) { width_ref = index; } + constexpr void on_dynamic_width(string_view) {} + + constexpr void on_precision(int p) { precision = p; } + constexpr void on_dynamic_precision(fmt::detail::auto_id) {} + constexpr void on_dynamic_precision(int index) { precision_ref = index; } + constexpr void on_dynamic_precision(string_view) {} + + constexpr void end_precision() {} + constexpr void on_type(fmt::presentation_type t) { type = t; } + constexpr void on_error(const char*) { res = error; } +}; + +template <size_t N> +constexpr test_format_specs_handler parse_test_specs(const char (&s)[N]) { + auto h = test_format_specs_handler(); + fmt::detail::parse_format_specs(s, s + N - 1, h); + return h; +} + +TEST(core_test, constexpr_parse_format_specs) { + using handler = test_format_specs_handler; + static_assert(parse_test_specs("<").alignment == fmt::align::left, ""); + static_assert(parse_test_specs("*^").fill == '*', ""); + static_assert(parse_test_specs("+").sign == fmt::sign::plus, ""); + static_assert(parse_test_specs("-").sign == fmt::sign::minus, ""); + static_assert(parse_test_specs(" ").sign == fmt::sign::space, ""); + static_assert(parse_test_specs("#").res == handler::hash, ""); + static_assert(parse_test_specs("0").res == handler::zero, ""); + static_assert(parse_test_specs("L").res == handler::loc, ""); + static_assert(parse_test_specs("42").width == 42, ""); + static_assert(parse_test_specs("{42}").width_ref.val.index == 42, ""); + static_assert(parse_test_specs(".42").precision == 42, ""); + static_assert(parse_test_specs(".{42}").precision_ref.val.index == 42, ""); + static_assert(parse_test_specs("d").type == fmt::presentation_type::dec, ""); + static_assert(parse_test_specs("{<").res == handler::error, ""); +} + +struct test_parse_context { + using char_type = char; + + constexpr int next_arg_id() { return 11; } + template <typename Id> FMT_CONSTEXPR void check_arg_id(Id) {} + FMT_CONSTEXPR void check_dynamic_spec(int) {} + + constexpr const char* begin() { return nullptr; } + constexpr const char* end() { return nullptr; } + + void on_error(const char*) {} +}; + +template <size_t N> +constexpr fmt::detail::dynamic_format_specs<char> parse_dynamic_specs( + const char (&s)[N]) { + auto specs = fmt::detail::dynamic_format_specs<char>(); + auto ctx = test_parse_context(); + auto h = fmt::detail::dynamic_specs_handler<test_parse_context>(specs, ctx); + parse_format_specs(s, s + N - 1, h); + return specs; +} + +TEST(format_test, constexpr_dynamic_specs_handler) { + static_assert(parse_dynamic_specs("<").align == fmt::align::left, ""); + static_assert(parse_dynamic_specs("*^").fill[0] == '*', ""); + static_assert(parse_dynamic_specs("+").sign == fmt::sign::plus, ""); + static_assert(parse_dynamic_specs("-").sign == fmt::sign::minus, ""); + static_assert(parse_dynamic_specs(" ").sign == fmt::sign::space, ""); + static_assert(parse_dynamic_specs("#").alt, ""); + static_assert(parse_dynamic_specs("0").align == fmt::align::numeric, ""); + static_assert(parse_dynamic_specs("42").width == 42, ""); + static_assert(parse_dynamic_specs("{}").width_ref.val.index == 11, ""); + static_assert(parse_dynamic_specs("{42}").width_ref.val.index == 42, ""); + static_assert(parse_dynamic_specs(".42").precision == 42, ""); + static_assert(parse_dynamic_specs(".{}").precision_ref.val.index == 11, ""); + static_assert(parse_dynamic_specs(".{42}").precision_ref.val.index == 42, ""); + static_assert(parse_dynamic_specs("d").type == fmt::presentation_type::dec, + ""); +} + +template <size_t N> +constexpr test_format_specs_handler check_specs(const char (&s)[N]) { + fmt::detail::specs_checker<test_format_specs_handler> checker( + test_format_specs_handler(), fmt::detail::type::double_type); + parse_format_specs(s, s + N - 1, checker); + return checker; +} + +TEST(format_test, constexpr_specs_checker) { + using handler = test_format_specs_handler; + static_assert(check_specs("<").alignment == fmt::align::left, ""); + static_assert(check_specs("*^").fill == '*', ""); + static_assert(check_specs("+").sign == fmt::sign::plus, ""); + static_assert(check_specs("-").sign == fmt::sign::minus, ""); + static_assert(check_specs(" ").sign == fmt::sign::space, ""); + static_assert(check_specs("#").res == handler::hash, ""); + static_assert(check_specs("0").res == handler::zero, ""); + static_assert(check_specs("42").width == 42, ""); + static_assert(check_specs("{42}").width_ref.val.index == 42, ""); + static_assert(check_specs(".42").precision == 42, ""); + static_assert(check_specs(".{42}").precision_ref.val.index == 42, ""); + static_assert(check_specs("d").type == fmt::presentation_type::dec, ""); + static_assert(check_specs("{<").res == handler::error, ""); +} + +struct test_format_string_handler { + constexpr void on_text(const char*, const char*) {} + + constexpr int on_arg_id() { return 0; } + + template <typename T> constexpr int on_arg_id(T) { return 0; } + + constexpr void on_replacement_field(int, const char*) {} + + constexpr const char* on_format_specs(int, const char* begin, const char*) { + return begin; + } + + constexpr void on_error(const char*) { error = true; } + + bool error = false; +}; + +template <size_t N> constexpr bool parse_string(const char (&s)[N]) { + auto h = test_format_string_handler(); + fmt::detail::parse_format_string<true>(fmt::string_view(s, N - 1), h); + return !h.error; +} + +TEST(format_test, constexpr_parse_format_string) { + static_assert(parse_string("foo"), ""); + static_assert(!parse_string("}"), ""); + static_assert(parse_string("{}"), ""); + static_assert(parse_string("{42}"), ""); + static_assert(parse_string("{foo}"), ""); + static_assert(parse_string("{:}"), ""); +} +#endif // FMT_USE_CONSTEXPR + +struct enabled_formatter {}; +struct enabled_ptr_formatter {}; +struct disabled_formatter {}; +struct disabled_formatter_convertible { + operator int() const { return 42; } +}; + +FMT_BEGIN_NAMESPACE +template <> struct formatter<enabled_formatter> { + auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) { + return ctx.begin(); + } + auto format(enabled_formatter, format_context& ctx) -> decltype(ctx.out()) { + return ctx.out(); + } +}; + +template <> struct formatter<enabled_ptr_formatter*> { + auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) { + return ctx.begin(); + } + auto format(enabled_ptr_formatter*, format_context& ctx) + -> decltype(ctx.out()) { + return ctx.out(); + } +}; +FMT_END_NAMESPACE + +TEST(core_test, has_formatter) { + using fmt::has_formatter; + using context = fmt::format_context; + static_assert(has_formatter<enabled_formatter, context>::value, ""); + static_assert(!has_formatter<disabled_formatter, context>::value, ""); + static_assert(!has_formatter<disabled_formatter_convertible, context>::value, + ""); +} + +struct const_formattable {}; +struct nonconst_formattable {}; + +FMT_BEGIN_NAMESPACE +template <> struct formatter<const_formattable> { + auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) { + return ctx.begin(); + } + + auto format(const const_formattable&, format_context& ctx) + -> decltype(ctx.out()) { + auto test = string_view("test"); + return std::copy_n(test.data(), test.size(), ctx.out()); + } +}; + +template <> struct formatter<nonconst_formattable> { + auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) { + return ctx.begin(); + } + + auto format(nonconst_formattable&, format_context& ctx) + -> decltype(ctx.out()) { + auto test = string_view("test"); + return std::copy_n(test.data(), test.size(), ctx.out()); + } +}; +FMT_END_NAMESPACE + +struct convertible_to_pointer { + operator const int*() const { return nullptr; } +}; + +struct convertible_to_pointer_formattable { + operator const int*() const { return nullptr; } +}; + +FMT_BEGIN_NAMESPACE +template <> struct formatter<convertible_to_pointer_formattable> { + auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) { + return ctx.begin(); + } + + auto format(convertible_to_pointer_formattable, format_context& ctx) const + -> decltype(ctx.out()) { + auto test = string_view("test"); + return std::copy_n(test.data(), test.size(), ctx.out()); + } +}; +FMT_END_NAMESPACE + +enum class unformattable_scoped_enum {}; + +namespace test { +enum class formattable_scoped_enum {}; +auto format_as(formattable_scoped_enum) -> int { return 42; } + +struct convertible_to_enum { + operator formattable_scoped_enum() const { return {}; } +}; +} // namespace test + +TEST(core_test, is_formattable) { +#if 0 + // This should be enabled once corresponding map overloads are gone. + static_assert(fmt::is_formattable<signed char*>::value, ""); + static_assert(fmt::is_formattable<unsigned char*>::value, ""); + static_assert(fmt::is_formattable<const signed char*>::value, ""); + static_assert(fmt::is_formattable<const unsigned char*>::value, ""); +#endif + static_assert(!fmt::is_formattable<wchar_t>::value, ""); +#ifdef __cpp_char8_t + static_assert(!fmt::is_formattable<char8_t>::value, ""); +#endif + static_assert(!fmt::is_formattable<char16_t>::value, ""); + static_assert(!fmt::is_formattable<char32_t>::value, ""); + static_assert(!fmt::is_formattable<const wchar_t*>::value, ""); + static_assert(!fmt::is_formattable<const wchar_t[3]>::value, ""); + static_assert(!fmt::is_formattable<fmt::basic_string_view<wchar_t>>::value, + ""); + static_assert(fmt::is_formattable<enabled_formatter>::value, ""); + static_assert(!fmt::is_formattable<enabled_ptr_formatter*>::value, ""); + static_assert(!fmt::is_formattable<disabled_formatter>::value, ""); + static_assert(fmt::is_formattable<disabled_formatter_convertible>::value, ""); + + static_assert(fmt::is_formattable<const_formattable&>::value, ""); + static_assert(fmt::is_formattable<const const_formattable&>::value, ""); + + static_assert(fmt::is_formattable<nonconst_formattable&>::value, ""); +#if !FMT_MSC_VERSION || FMT_MSC_VERSION >= 1910 + static_assert(!fmt::is_formattable<const nonconst_formattable&>::value, ""); +#endif + + static_assert(!fmt::is_formattable<convertible_to_pointer>::value, ""); + const auto f = convertible_to_pointer_formattable(); + EXPECT_EQ(fmt::format("{}", f), "test"); + + static_assert(!fmt::is_formattable<void (*)()>::value, ""); + + struct s; + static_assert(!fmt::is_formattable<int(s::*)>::value, ""); + static_assert(!fmt::is_formattable<int (s::*)()>::value, ""); + static_assert(!fmt::is_formattable<unformattable_scoped_enum>::value, ""); + static_assert(fmt::is_formattable<test::formattable_scoped_enum>::value, ""); + static_assert(!fmt::is_formattable<test::convertible_to_enum>::value, ""); +} + +TEST(core_test, format) { EXPECT_EQ(fmt::format("{}", 42), "42"); } + +TEST(core_test, format_to) { + std::string s; + fmt::format_to(std::back_inserter(s), "{}", 42); + EXPECT_EQ(s, "42"); +} + +TEST(core_test, format_as) { + EXPECT_EQ(fmt::format("{}", test::formattable_scoped_enum()), "42"); +} + +struct convertible_to_int { + operator int() const { return 42; } +}; + +struct convertible_to_c_string { + operator const char*() const { return "foo"; } +}; + +FMT_BEGIN_NAMESPACE +template <> struct formatter<convertible_to_int> { + auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) { + return ctx.begin(); + } + auto format(convertible_to_int, format_context& ctx) -> decltype(ctx.out()) { + return std::copy_n("foo", 3, ctx.out()); + } +}; + +template <> struct formatter<convertible_to_c_string> { + FMT_CONSTEXPR auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) { + return ctx.begin(); + } + auto format(convertible_to_c_string, format_context& ctx) + -> decltype(ctx.out()) { + return std::copy_n("bar", 3, ctx.out()); + } +}; +FMT_END_NAMESPACE + +TEST(core_test, formatter_overrides_implicit_conversion) { + EXPECT_EQ(fmt::format("{}", convertible_to_int()), "foo"); + EXPECT_EQ(fmt::format("{}", convertible_to_c_string()), "bar"); +} + +// Test that check is not found by ADL. +template <typename T> void check(T); +TEST(core_test, adl_check) { + EXPECT_EQ(fmt::format("{}", test_struct()), "test"); +} + +TEST(core_test, to_string_view_foreign_strings) { + using namespace test_ns; + EXPECT_EQ(to_string_view(test_string<char>("42")), "42"); + fmt::detail::type type = + fmt::detail::mapped_type_constant<test_string<char>, + fmt::format_context>::value; + EXPECT_EQ(type, fmt::detail::type::string_type); +} + +struct implicitly_convertible_to_string { + operator std::string() const { return "foo"; } +}; + +struct implicitly_convertible_to_string_view { + operator fmt::string_view() const { return "foo"; } +}; + +TEST(core_test, format_implicitly_convertible_to_string_view) { + EXPECT_EQ("foo", fmt::format("{}", implicitly_convertible_to_string_view())); +} + +// std::is_constructible is broken in MSVC until version 2015. +#if !FMT_MSC_VERSION || FMT_MSC_VERSION >= 1900 +struct explicitly_convertible_to_string_view { + explicit operator fmt::string_view() const { return "foo"; } +}; + +TEST(core_test, format_explicitly_convertible_to_string_view) { + // Types explicitly convertible to string_view are not formattable by + // default because it may introduce ODR violations. + static_assert( + !fmt::is_formattable<explicitly_convertible_to_string_view>::value, ""); +} + +# ifdef FMT_USE_STRING_VIEW +struct explicitly_convertible_to_std_string_view { + explicit operator std::string_view() const { return "foo"; } +}; + +TEST(core_test, format_explicitly_convertible_to_std_string_view) { + // Types explicitly convertible to string_view are not formattable by + // default because it may introduce ODR violations. + static_assert( + !fmt::is_formattable<explicitly_convertible_to_std_string_view>::value, + ""); +} +# endif +#endif + +struct convertible_to_long_long { + operator long long() const { return 1LL << 32; } +}; + +TEST(format_test, format_convertible_to_long_long) { + EXPECT_EQ("100000000", fmt::format("{:x}", convertible_to_long_long())); +} + +struct disabled_rvalue_conversion { + operator const char*() const& { return "foo"; } + operator const char*() & { return "foo"; } + operator const char*() const&& = delete; + operator const char*() && = delete; +}; + +TEST(core_test, disabled_rvalue_conversion) { + EXPECT_EQ("foo", fmt::format("{}", disabled_rvalue_conversion())); +} + +namespace adl_test { +template <typename... T> void make_format_args(const T&...) = delete; + +struct string : std::string {}; +} // namespace adl_test + +// Test that formatting functions compile when make_format_args is found by ADL. +TEST(core_test, adl) { + // Only check compilation and don't run the code to avoid polluting the output + // and since the output is tested elsewhere. + if (fmt::detail::const_check(true)) return; + auto s = adl_test::string(); + char buf[10]; + (void)fmt::format("{}", s); + fmt::format_to(buf, "{}", s); + fmt::format_to_n(buf, 10, "{}", s); + (void)fmt::formatted_size("{}", s); + fmt::print("{}", s); + fmt::print(stdout, "{}", s); +} + +TEST(core_test, has_const_formatter) { + EXPECT_TRUE((fmt::detail::has_const_formatter<const_formattable, + fmt::format_context>())); + EXPECT_FALSE((fmt::detail::has_const_formatter<nonconst_formattable, + fmt::format_context>())); +} + +TEST(core_test, format_nonconst) { + EXPECT_EQ(fmt::format("{}", nonconst_formattable()), "test"); +} |