Mercurial > minori
view dep/fmt/test/format-test.cc @ 343:1faa72660932
*: transfer back to cmake from autotools
autotools just made lots of things more complicated than
they should have and many things broke (i.e. translations)
| author | Paper <paper@paper.us.eu.org> |
|---|---|
| date | Thu, 20 Jun 2024 05:56:06 -0400 |
| parents | |
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// 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(format_impl_test, compute_width) { EXPECT_EQ(fmt::detail::compute_width("вожык"), 5); } 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) { using allocator = allocator_ref<mock_allocator<int>>; 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, exception_from_lib) { EXPECT_THROW_MSG(fmt::throw_format_error("test"), format_error, "test"); } TEST(format_test, escape) { EXPECT_EQ(fmt::format("{{"), "{"); EXPECT_EQ(fmt::format("before {{"), "before {"); EXPECT_EQ(fmt::format("{{ after"), "{ after"); EXPECT_EQ(fmt::format("before {{ after"), "before { after"); EXPECT_EQ(fmt::format("}}"), "}"); EXPECT_EQ(fmt::format("before }}"), "before }"); EXPECT_EQ(fmt::format("}} after"), "} after"); EXPECT_EQ(fmt::format("before }} after"), "before } after"); EXPECT_EQ(fmt::format("{{}}"), "{}"); EXPECT_EQ(fmt::format("{{{0}}}", 42), "{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(fmt::format("test"), "test"); } TEST(format_test, args_in_different_positions) { EXPECT_EQ(fmt::format("{0}", 42), "42"); EXPECT_EQ(fmt::format("before {0}", 42), "before 42"); EXPECT_EQ(fmt::format("{0} after", 42), "42 after"); EXPECT_EQ(fmt::format("before {0} after", 42), "before 42 after"); EXPECT_EQ(fmt::format("{0} = {1}", "answer", 42), "answer = 42"); EXPECT_EQ(fmt::format("{1} is the {0}", "answer", 42), "42 is the answer"); EXPECT_EQ(fmt::format("{0}{1}{0}", "abra", "cad"), "abracadabra"); } 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"); auto int_max = std::to_string(INT_MAX); EXPECT_THROW_MSG((void)fmt::format(runtime("{" + int_max)), format_error, "invalid format string"); EXPECT_THROW_MSG((void)fmt::format(runtime("{" + int_max + "}")), format_error, "argument not found"); auto int_maxer = std::to_string(INT_MAX + 1u); EXPECT_THROW_MSG((void)fmt::format(runtime("{" + int_maxer)), format_error, "invalid format string"); EXPECT_THROW_MSG((void)fmt::format(runtime("{" + int_maxer + "}")), format_error, "argument not found"); } template <int N> struct test_format { template <typename... T> static auto format(fmt::string_view fmt, const T&... args) -> std::string { return test_format<N - 1>::format(fmt, N - 1, args...); } }; template <> struct test_format<0> { template <typename... T> static auto format(fmt::string_view fmt, const T&... args) -> std::string { 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(fmt::format("{0:{width}}", -42, fmt::arg("width", 4)), " -42"); EXPECT_EQ("st", fmt::format("{0:.{precision}}", "str", fmt::arg("precision", 2))); EXPECT_EQ(fmt::format("{} {two}", 1, fmt::arg("two", 2)), "1 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(fmt::format("{}{}{}", 'a', 'b', 'c'), "abc"); 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(fmt::format("{:.{}}", 1.2345, 2), "1.2"); 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(fmt::format("{0:}", 42), "42"); } TEST(format_test, left_align) { EXPECT_EQ(fmt::format("{0:<4}", 42), "42 "); EXPECT_EQ(fmt::format("{0:<4o}", 042), "42 "); EXPECT_EQ(fmt::format("{0:<4x}", 0x42), "42 "); EXPECT_EQ(fmt::format("{0:<5}", -42), "-42 "); EXPECT_EQ(fmt::format("{0:<5}", 42u), "42 "); EXPECT_EQ(fmt::format("{0:<5}", -42l), "-42 "); EXPECT_EQ(fmt::format("{0:<5}", 42ul), "42 "); EXPECT_EQ(fmt::format("{0:<5}", -42ll), "-42 "); EXPECT_EQ(fmt::format("{0:<5}", 42ull), "42 "); EXPECT_EQ(fmt::format("{0:<5}", -42.0), "-42 "); EXPECT_EQ(fmt::format("{0:<5}", -42.0l), "-42 "); EXPECT_EQ(fmt::format("{0:<5}", 'c'), "c "); EXPECT_EQ(fmt::format("{0:<5}", "abc"), "abc "); EXPECT_EQ(fmt::format("{0:<8}", reinterpret_cast<void*>(0xface)), "0xface "); } TEST(format_test, right_align) { EXPECT_EQ(fmt::format("{0:>4}", 42), " 42"); EXPECT_EQ(fmt::format("{0:>4o}", 042), " 42"); EXPECT_EQ(fmt::format("{0:>4x}", 0x42), " 42"); EXPECT_EQ(fmt::format("{0:>5}", -42), " -42"); EXPECT_EQ(fmt::format("{0:>5}", 42u), " 42"); EXPECT_EQ(fmt::format("{0:>5}", -42l), " -42"); EXPECT_EQ(fmt::format("{0:>5}", 42ul), " 42"); EXPECT_EQ(fmt::format("{0:>5}", -42ll), " -42"); EXPECT_EQ(fmt::format("{0:>5}", 42ull), " 42"); EXPECT_EQ(fmt::format("{0:>5}", -42.0), " -42"); EXPECT_EQ(fmt::format("{0:>5}", -42.0l), " -42"); EXPECT_EQ(fmt::format("{0:>5}", 'c'), " c"); EXPECT_EQ(fmt::format("{0:>5}", "abc"), " abc"); EXPECT_EQ(fmt::format("{0:>8}", reinterpret_cast<void*>(0xface)), " 0xface"); } TEST(format_test, center_align) { EXPECT_EQ(fmt::format("{0:^5}", 42), " 42 "); EXPECT_EQ(fmt::format("{0:^5o}", 042), " 42 "); EXPECT_EQ(fmt::format("{0:^5x}", 0x42), " 42 "); EXPECT_EQ(fmt::format("{0:^5}", -42), " -42 "); EXPECT_EQ(fmt::format("{0:^5}", 42u), " 42 "); EXPECT_EQ(fmt::format("{0:^5}", -42l), " -42 "); EXPECT_EQ(fmt::format("{0:^5}", 42ul), " 42 "); EXPECT_EQ(fmt::format("{0:^5}", -42ll), " -42 "); EXPECT_EQ(fmt::format("{0:^5}", 42ull), " 42 "); EXPECT_EQ(fmt::format("{0:^5}", -42.0), " -42 "); EXPECT_EQ(fmt::format("{0:^5}", -42.0l), " -42 "); EXPECT_EQ(fmt::format("{0:^5}", 'c'), " c "); EXPECT_EQ(fmt::format("{0:^6}", "abc"), " abc "); EXPECT_EQ(fmt::format("{0:^8}", reinterpret_cast<void*>(0xface)), " 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(fmt::format("{0:*>4}", 42), "**42"); EXPECT_EQ(fmt::format("{0:*>5}", -42), "**-42"); EXPECT_EQ(fmt::format("{0:*>5}", 42u), "***42"); EXPECT_EQ(fmt::format("{0:*>5}", -42l), "**-42"); EXPECT_EQ(fmt::format("{0:*>5}", 42ul), "***42"); EXPECT_EQ(fmt::format("{0:*>5}", -42ll), "**-42"); EXPECT_EQ(fmt::format("{0:*>5}", 42ull), "***42"); EXPECT_EQ(fmt::format("{0:*>5}", -42.0), "**-42"); EXPECT_EQ(fmt::format("{0:*>5}", -42.0l), "**-42"); EXPECT_EQ(fmt::format("{0:*<5}", 'c'), "c****"); EXPECT_EQ(fmt::format("{0:*<5}", "abc"), "abc**"); EXPECT_EQ("**0xface", fmt::format("{0:*>8}", reinterpret_cast<void*>(0xface))); EXPECT_EQ(fmt::format("{:}=", "foo"), "foo="); EXPECT_EQ(std::string("\0\0\0*", 4), fmt::format(string_view("{:\0>4}", 6), '*')); EXPECT_EQ(fmt::format("{0:ж>4}", 42), "жж42"); EXPECT_THROW_MSG((void)fmt::format(runtime("{:\x80\x80\x80\x80\x80>}"), 0), format_error, "invalid format specifier"); } TEST(format_test, plus_sign) { EXPECT_EQ(fmt::format("{0:+}", 42), "+42"); EXPECT_EQ(fmt::format("{0:+}", -42), "-42"); EXPECT_EQ(fmt::format("{0:+}", 42), "+42"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:+}"), 42u), format_error, "invalid format specifier"); EXPECT_EQ(fmt::format("{0:+}", 42l), "+42"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:+}"), 42ul), format_error, "invalid format specifier"); EXPECT_EQ(fmt::format("{0:+}", 42ll), "+42"); #if FMT_USE_INT128 EXPECT_EQ(fmt::format("{0:+}", __int128_t(42)), "+42"); #endif EXPECT_THROW_MSG((void)fmt::format(runtime("{0:+}"), 42ull), format_error, "invalid format specifier"); EXPECT_EQ(fmt::format("{0:+}", 42.0), "+42"); EXPECT_EQ(fmt::format("{0:+}", 42.0l), "+42"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:+}"), 'c'), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:+}"), "abc"), format_error, "invalid format specifier"); EXPECT_THROW_MSG( (void)fmt::format(runtime("{0:+}"), reinterpret_cast<void*>(0x42)), format_error, "invalid format specifier"); } TEST(format_test, minus_sign) { EXPECT_EQ(fmt::format("{0:-}", 42), "42"); EXPECT_EQ(fmt::format("{0:-}", -42), "-42"); EXPECT_EQ(fmt::format("{0:-}", 42), "42"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:-}"), 42u), format_error, "invalid format specifier"); EXPECT_EQ(fmt::format("{0:-}", 42l), "42"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:-}"), 42ul), format_error, "invalid format specifier"); EXPECT_EQ(fmt::format("{0:-}", 42ll), "42"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:-}"), 42ull), format_error, "invalid format specifier"); EXPECT_EQ(fmt::format("{0:-}", 42.0), "42"); EXPECT_EQ(fmt::format("{0:-}", 42.0l), "42"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:-}"), 'c'), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:-}"), "abc"), format_error, "invalid format specifier"); EXPECT_THROW_MSG( (void)fmt::format(runtime("{0:-}"), reinterpret_cast<void*>(0x42)), format_error, "invalid format specifier"); } TEST(format_test, space_sign) { EXPECT_EQ(fmt::format("{0: }", 42), " 42"); EXPECT_EQ(fmt::format("{0: }", -42), "-42"); EXPECT_EQ(fmt::format("{0: }", 42), " 42"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0: }"), 42u), format_error, "invalid format specifier"); EXPECT_EQ(fmt::format("{0: }", 42l), " 42"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0: }"), 42ul), format_error, "invalid format specifier"); EXPECT_EQ(fmt::format("{0: }", 42ll), " 42"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0: }"), 42ull), format_error, "invalid format specifier"); EXPECT_EQ(fmt::format("{0: }", 42.0), " 42"); EXPECT_EQ(fmt::format("{0: }", 42.0l), " 42"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0: }"), 'c'), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0: }"), "abc"), format_error, "invalid format specifier"); EXPECT_THROW_MSG( (void)fmt::format(runtime("{0: }"), reinterpret_cast<void*>(0x42)), format_error, "invalid format specifier"); } TEST(format_test, hash_flag) { EXPECT_EQ(fmt::format("{0:#}", 42), "42"); EXPECT_EQ(fmt::format("{0:#}", -42), "-42"); EXPECT_EQ(fmt::format("{0:#b}", 42), "0b101010"); EXPECT_EQ(fmt::format("{0:#B}", 42), "0B101010"); EXPECT_EQ(fmt::format("{0:#b}", -42), "-0b101010"); EXPECT_EQ(fmt::format("{0:#x}", 0x42), "0x42"); EXPECT_EQ(fmt::format("{0:#X}", 0x42), "0X42"); EXPECT_EQ(fmt::format("{0:#x}", -0x42), "-0x42"); EXPECT_EQ(fmt::format("{0:#o}", 0), "0"); EXPECT_EQ(fmt::format("{0:#o}", 042), "042"); EXPECT_EQ(fmt::format("{0:#o}", -042), "-042"); EXPECT_EQ(fmt::format("{0:#}", 42u), "42"); EXPECT_EQ(fmt::format("{0:#x}", 0x42u), "0x42"); EXPECT_EQ(fmt::format("{0:#o}", 042u), "042"); EXPECT_EQ(fmt::format("{0:#}", -42l), "-42"); EXPECT_EQ(fmt::format("{0:#x}", 0x42l), "0x42"); EXPECT_EQ(fmt::format("{0:#x}", -0x42l), "-0x42"); EXPECT_EQ(fmt::format("{0:#o}", 042l), "042"); EXPECT_EQ(fmt::format("{0:#o}", -042l), "-042"); EXPECT_EQ(fmt::format("{0:#}", 42ul), "42"); EXPECT_EQ(fmt::format("{0:#x}", 0x42ul), "0x42"); EXPECT_EQ(fmt::format("{0:#o}", 042ul), "042"); EXPECT_EQ(fmt::format("{0:#}", -42ll), "-42"); EXPECT_EQ(fmt::format("{0:#x}", 0x42ll), "0x42"); EXPECT_EQ(fmt::format("{0:#x}", -0x42ll), "-0x42"); EXPECT_EQ(fmt::format("{0:#o}", 042ll), "042"); EXPECT_EQ(fmt::format("{0:#o}", -042ll), "-042"); EXPECT_EQ(fmt::format("{0:#}", 42ull), "42"); EXPECT_EQ(fmt::format("{0:#x}", 0x42ull), "0x42"); EXPECT_EQ(fmt::format("{0:#o}", 042ull), "042"); EXPECT_EQ(fmt::format("{0:#}", -42.0), "-42."); EXPECT_EQ(fmt::format("{0:#}", -42.0l), "-42."); EXPECT_EQ(fmt::format("{:#.0e}", 42.0), "4.e+01"); EXPECT_EQ(fmt::format("{:#.0f}", 0.01), "0."); EXPECT_EQ(fmt::format("{:#.2g}", 0.5), "0.50"); EXPECT_EQ(fmt::format("{:#.0f}", 0.5), "0."); 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, "invalid format specifier"); EXPECT_THROW_MSG( (void)fmt::format(runtime("{0:#}"), reinterpret_cast<void*>(0x42)), format_error, "invalid format specifier"); } TEST(format_test, zero_flag) { EXPECT_EQ(fmt::format("{0:0}", 42), "42"); EXPECT_EQ(fmt::format("{0:05}", -42), "-0042"); EXPECT_EQ(fmt::format("{0:05}", 42u), "00042"); EXPECT_EQ(fmt::format("{0:05}", -42l), "-0042"); EXPECT_EQ(fmt::format("{0:05}", 42ul), "00042"); EXPECT_EQ(fmt::format("{0:05}", -42ll), "-0042"); EXPECT_EQ(fmt::format("{0:05}", 42ull), "00042"); EXPECT_EQ(fmt::format("{0:07}", -42.0), "-000042"); EXPECT_EQ(fmt::format("{0:07}", -42.0l), "-000042"); 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, zero_flag_and_align) { // If the 0 character and an align option both appear, the 0 character is // ignored. EXPECT_EQ(fmt::format("{:<05}", 42), "42 "); EXPECT_EQ(fmt::format("{:<05}", -42), "-42 "); EXPECT_EQ(fmt::format("{:^05}", 42), " 42 "); EXPECT_EQ(fmt::format("{:^05}", -42), " -42 "); EXPECT_EQ(fmt::format("{:>05}", 42), " 42"); EXPECT_EQ(fmt::format("{:>05}", -42), " -42"); } TEST(format_test, width) { auto int_maxer = std::to_string(INT_MAX + 1u); EXPECT_THROW_MSG((void)fmt::format(runtime("{:" + int_maxer), 0), format_error, "number is too big"); EXPECT_THROW_MSG((void)fmt::format(runtime("{:" + int_maxer + "}"), 0), format_error, "number is too big"); EXPECT_EQ(fmt::format("{:4}", -42), " -42"); EXPECT_EQ(fmt::format("{:5}", 42u), " 42"); EXPECT_EQ(fmt::format("{:6}", -42l), " -42"); EXPECT_EQ(fmt::format("{:7}", 42ul), " 42"); EXPECT_EQ(fmt::format("{:6}", -42ll), " -42"); EXPECT_EQ(fmt::format("{:7}", 42ull), " 42"); EXPECT_EQ(fmt::format("{:8}", -1.23), " -1.23"); EXPECT_EQ(fmt::format("{:9}", -1.23l), " -1.23"); EXPECT_EQ(fmt::format("{:10}", reinterpret_cast<void*>(0xcafe)), " 0xcafe"); EXPECT_EQ(fmt::format("{:11}", 'x'), "x "); EXPECT_EQ(fmt::format("{:12}", "str"), "str "); EXPECT_EQ(fmt::format("{:*^6}", "🤡"), "**🤡**"); EXPECT_EQ(fmt::format("{:*^8}", "你好"), "**你好**"); EXPECT_EQ(fmt::format("{:#6}", 42.0), " 42."); EXPECT_EQ(fmt::format("{:6c}", static_cast<int>('x')), "x "); EXPECT_EQ(fmt::format("{:>06.0f}", 0.00884311), " 0"); } TEST(format_test, runtime_width) { auto int_maxer = std::to_string(INT_MAX + 1u); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{" + int_maxer), 0), format_error, "invalid format string"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{" + int_maxer + "}"), 0), format_error, "argument not found"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{" + int_maxer + "}}"), 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(fmt::format("{0:{1}}", -42, 4), " -42"); EXPECT_EQ(fmt::format("{0:{1}}", 42u, 5), " 42"); EXPECT_EQ(fmt::format("{0:{1}}", -42l, 6), " -42"); EXPECT_EQ(fmt::format("{0:{1}}", 42ul, 7), " 42"); EXPECT_EQ(fmt::format("{0:{1}}", -42ll, 6), " -42"); EXPECT_EQ(fmt::format("{0:{1}}", 42ull, 7), " 42"); EXPECT_EQ(fmt::format("{0:{1}}", -1.23, 8), " -1.23"); EXPECT_EQ(fmt::format("{0:{1}}", -1.23l, 9), " -1.23"); EXPECT_EQ(" 0xcafe", fmt::format("{0:{1}}", reinterpret_cast<void*>(0xcafe), 10)); EXPECT_EQ(fmt::format("{0:{1}}", 'x', 11), "x "); EXPECT_EQ(fmt::format("{0:{1}}", "str", 12), "str "); 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), 0.0), 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), 0.0), format_error, "number is too big"); safe_sprintf(format_str, "{0:.%u", INT_MAX + 1u); EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0.0), format_error, "number is too big"); safe_sprintf(format_str, "{0:.%u}", INT_MAX + 1u); EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0.0), format_error, "number is too big"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:."), 0.0), format_error, "invalid precision"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.}"), 0.0), format_error, "invalid precision"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2"), 0), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2}"), 42), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2f}"), 42), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2}"), 42u), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2f}"), 42u), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2}"), 42l), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2f}"), 42l), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2}"), 42ul), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2f}"), 42ul), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2}"), 42ll), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2f}"), 42ll), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2}"), 42ull), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2f}"), 42ull), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:3.0}"), 'x'), format_error, "invalid format specifier"); EXPECT_EQ(fmt::format("{0:.2}", 1.2345), "1.2"); EXPECT_EQ(fmt::format("{0:.2}", 1.2345l), "1.2"); EXPECT_EQ(fmt::format("{:.2}", 1.234e56), "1.2e+56"); EXPECT_EQ(fmt::format("{0:.3}", 1.1), "1.1"); EXPECT_EQ(fmt::format("{:.0e}", 1.0L), "1e+00"); EXPECT_EQ(fmt::format("{:9.1e}", 0.0), " 0.0e+00"); 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(fmt::format("{:#.0f}", 123.0), "123."); EXPECT_EQ(fmt::format("{:.02f}", 1.234), "1.23"); EXPECT_EQ(fmt::format("{:.1g}", 0.001), "0.001"); EXPECT_EQ(fmt::format("{}", 1019666432.0f), "1019666400"); EXPECT_EQ(fmt::format("{:.0e}", 9.5), "1e+01"); EXPECT_EQ(fmt::format("{:.1e}", 1e-34), "1.0e-34"); EXPECT_THROW_MSG( (void)fmt::format(runtime("{0:.2}"), reinterpret_cast<void*>(0xcafe)), format_error, "invalid format specifier"); EXPECT_THROW_MSG( (void)fmt::format(runtime("{0:.2f}"), reinterpret_cast<void*>(0xcafe)), format_error, "invalid format specifier"); 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(fmt::format("{0:.2}", "str"), "st"); EXPECT_EQ(fmt::format("{0:.5}", "вожыкі"), "вожык"); EXPECT_EQ(fmt::format("{0:.6}", "123456\xad"), "123456"); } TEST(xchar_test, utf8_precision) { auto result = fmt::format("{:.4}", "caf\u00e9s"); // cafés EXPECT_EQ(fmt::detail::compute_width(result), 4); EXPECT_EQ(result, "caf\u00e9"); } 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), 0.0), 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), 0.0), format_error, "argument not found"); format_str[size + 1] = '}'; format_str[size + 2] = 0; EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0.0), 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:.{}"), 0.0), format_error, "cannot switch from manual to automatic argument indexing"); 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, 0), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0.0), format_error, "argument not found"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{0:}}"), 0.0), format_error, "invalid format string"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0.0, -1), format_error, "negative precision"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0.0, (INT_MAX + 1u)), format_error, "number is too big"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0.0, -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}}"), 0.0, (value + 1)), format_error, "number is too big"); } EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0.0, (INT_MAX + 1ul)), format_error, "number is too big"); 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}}"), 0.0, 0.0), format_error, "precision is not integer"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 42, 2), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"), 42, 2), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 42u, 2), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"), 42u, 2), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 42l, 2), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"), 42l, 2), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 42ul, 2), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"), 42ul, 2), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 42ll, 2), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"), 42ll, 2), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 42ull, 2), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"), 42ull, 2), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:3.{1}}"), 'x', 0), format_error, "invalid format specifier"); EXPECT_EQ(fmt::format("{0:.{1}}", 1.2345, 2), "1.2"); EXPECT_EQ(fmt::format("{1:.{0}}", 2, 1.2345l), "1.2"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), reinterpret_cast<void*>(0xcafe), 2), format_error, "invalid format specifier"); EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"), reinterpret_cast<void*>(0xcafe), 2), format_error, "invalid format specifier"); EXPECT_EQ(fmt::format("{0:.{1}}", "str", 2), "st"); } TEST(format_test, format_bool) { EXPECT_EQ(fmt::format("{}", true), "true"); EXPECT_EQ(fmt::format("{}", false), "false"); EXPECT_EQ(fmt::format("{:d}", true), "1"); EXPECT_EQ(fmt::format("{:5}", true), "true "); EXPECT_EQ(fmt::format("{:s}", true), "true"); EXPECT_EQ(fmt::format("{:s}", false), "false"); EXPECT_EQ(fmt::format("{:6s}", false), "false "); EXPECT_THROW_MSG((void)fmt::format(runtime("{:c}"), false), format_error, "invalid format specifier"); } TEST(format_test, format_short) { short s = 42; EXPECT_EQ(fmt::format("{0:d}", s), "42"); unsigned short us = 42; EXPECT_EQ(fmt::format("{0:d}", us), "42"); } 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 format 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 format specifier"); check_unknown_types(42, "bBdoxXnLc", "integer"); EXPECT_EQ(fmt::format("{:c}", static_cast<int>('x')), "x"); } TEST(format_test, format_bin) { EXPECT_EQ(fmt::format("{0:b}", 0), "0"); EXPECT_EQ(fmt::format("{0:b}", 42), "101010"); EXPECT_EQ(fmt::format("{0:b}", 42u), "101010"); EXPECT_EQ(fmt::format("{0:b}", -42), "-101010"); EXPECT_EQ(fmt::format("{0:b}", 12345), "11000000111001"); EXPECT_EQ(fmt::format("{0:b}", 0x12345678), "10010001101000101011001111000"); 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(fmt::format("{0}", 0), "0"); EXPECT_EQ(fmt::format("{0}", 42), "42"); EXPECT_EQ(fmt::format("{:}>", 42), "42>"); EXPECT_EQ(fmt::format("{0:d}", 42), "42"); EXPECT_EQ(fmt::format("{0}", 42u), "42"); EXPECT_EQ(fmt::format("{0}", -42), "-42"); EXPECT_EQ(fmt::format("{0}", 12345), "12345"); EXPECT_EQ(fmt::format("{0}", 67890), "67890"); #if FMT_USE_INT128 EXPECT_EQ(fmt::format("{0}", static_cast<__int128_t>(0)), "0"); EXPECT_EQ(fmt::format("{0}", static_cast<__uint128_t>(0)), "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(fmt::format("{0:x}", 0), "0"); EXPECT_EQ(fmt::format("{0:x}", 0x42), "42"); EXPECT_EQ(fmt::format("{0:x}", 0x42u), "42"); EXPECT_EQ(fmt::format("{0:x}", -0x42), "-42"); EXPECT_EQ(fmt::format("{0:x}", 0x12345678), "12345678"); EXPECT_EQ(fmt::format("{0:x}", 0x90abcdef), "90abcdef"); EXPECT_EQ(fmt::format("{0:X}", 0x12345678), "12345678"); EXPECT_EQ(fmt::format("{0:X}", 0x90ABCDEF), "90ABCDEF"); #if FMT_USE_INT128 EXPECT_EQ(fmt::format("{0:x}", static_cast<__int128_t>(0)), "0"); EXPECT_EQ(fmt::format("{0:x}", static_cast<__uint128_t>(0)), "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(fmt::format("{0:o}", 0), "0"); EXPECT_EQ(fmt::format("{0:o}", 042), "42"); EXPECT_EQ(fmt::format("{0:o}", 042u), "42"); EXPECT_EQ(fmt::format("{0:o}", -042), "-42"); EXPECT_EQ(fmt::format("{0:o}", 012345670), "12345670"); #if FMT_USE_INT128 EXPECT_EQ(fmt::format("{0:o}", static_cast<__int128_t>(0)), "0"); EXPECT_EQ(fmt::format("{0:o}", static_cast<__uint128_t>(0)), "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(fmt::format("{:L}", 1234), "1234"); } TEST(format_test, format_float) { EXPECT_EQ(fmt::format("{}", 0.0f), "0"); EXPECT_EQ(fmt::format("{0:f}", 392.5f), "392.500000"); } 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}", 4.2f), " 0x1.0cccccp+2"); 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"); #if FMT_CPLUSPLUS >= 201703L double xd = 0x1.ffffffffffp+2; EXPECT_EQ(fmt::format("{:.10a}", xd), "0x1.ffffffffffp+2"); EXPECT_EQ(fmt::format("{:.9a}", xd), "0x2.000000000p+2"); if (std::numeric_limits<long double>::digits == 64) { auto ld = 0xf.ffffffffffp-3l; EXPECT_EQ(fmt::format("{:a}", ld), "0xf.ffffffffffp-3"); EXPECT_EQ(fmt::format("{:.10a}", ld), "0xf.ffffffffffp-3"); EXPECT_EQ(fmt::format("{:.9a}", ld), "0x1.000000000p+1"); } #endif if (fmt::detail::const_check(std::numeric_limits<double>::is_iec559)) { double d = (std::numeric_limits<double>::min)(); EXPECT_EQ(fmt::format("{:a}", d), "0x1p-1022"); EXPECT_EQ(fmt::format("{:#a}", d), "0x1.p-1022"); d = (std::numeric_limits<double>::max)(); EXPECT_EQ(fmt::format("{:a}", d), "0x1.fffffffffffffp+1023"); d = std::numeric_limits<double>::denorm_min(); EXPECT_EQ(fmt::format("{:a}", d), "0x0.0000000000001p-1022"); } if (std::numeric_limits<long double>::digits == 64) { auto ld = (std::numeric_limits<long double>::min)(); EXPECT_EQ(fmt::format("{:a}", ld), "0x8p-16385"); ld = (std::numeric_limits<long double>::max)(); EXPECT_EQ(fmt::format("{:a}", ld), "0xf.fffffffffffffffp+16380"); ld = std::numeric_limits<long double>::denorm_min(); EXPECT_EQ(fmt::format("{:a}", ld), "0x0.000000000000001p-16382"); } EXPECT_EQ(fmt::format("{:.10a}", 4.2), "0x1.0ccccccccdp+2"); EXPECT_EQ(fmt::format("{:a}", -42.0), "-0x1.5p+5"); EXPECT_EQ(fmt::format("{:A}", -42.0), "-0X1.5P+5"); EXPECT_EQ(fmt::format("{:f}", 9223372036854775807.0), "9223372036854775808.000000"); } TEST(format_test, precision_rounding) { EXPECT_EQ(fmt::format("{:.0f}", 0.0), "0"); EXPECT_EQ(fmt::format("{:.0f}", 0.01), "0"); EXPECT_EQ(fmt::format("{:.0f}", 0.1), "0"); EXPECT_EQ(fmt::format("{:.3f}", 0.00049), "0.000"); EXPECT_EQ(fmt::format("{:.3f}", 0.0005), "0.001"); EXPECT_EQ(fmt::format("{:.3f}", 0.00149), "0.001"); EXPECT_EQ(fmt::format("{:.3f}", 0.0015), "0.002"); EXPECT_EQ(fmt::format("{:.3f}", 0.9999), "1.000"); EXPECT_EQ(fmt::format("{:.3}", 0.00123), "0.00123"); EXPECT_EQ(fmt::format("{:.16g}", 0.1), "0.1"); EXPECT_EQ(fmt::format("{:.0}", 1.0), "1"); EXPECT_EQ("225.51575035152063720", fmt::format("{:.17f}", 225.51575035152064)); EXPECT_EQ(fmt::format("{:.1f}", -761519619559038.2), "-761519619559038.2"); EXPECT_EQ("1.9156918820264798e-56", fmt::format("{}", 1.9156918820264798e-56)); EXPECT_EQ(fmt::format("{:.4f}", 7.2809479766055470e-15), "0.0000"); } TEST(format_test, prettify_float) { EXPECT_EQ(fmt::format("{}", 1e-4), "0.0001"); EXPECT_EQ(fmt::format("{}", 1e-5), "1e-05"); EXPECT_EQ(fmt::format("{}", 1e15), "1000000000000000"); EXPECT_EQ(fmt::format("{}", 1e16), "1e+16"); EXPECT_EQ(fmt::format("{}", 9.999e-5), "9.999e-05"); EXPECT_EQ(fmt::format("{}", 1e10), "10000000000"); EXPECT_EQ(fmt::format("{}", 1e11), "100000000000"); EXPECT_EQ(fmt::format("{}", 1234e7), "12340000000"); EXPECT_EQ(fmt::format("{}", 1234e-2), "12.34"); EXPECT_EQ(fmt::format("{}", 1234e-6), "0.001234"); EXPECT_EQ(fmt::format("{}", 0.1f), "0.1"); EXPECT_EQ(fmt::format("{}", 1.35631564e-19f), "1.3563156e-19"); } TEST(format_test, format_nan) { double nan = std::numeric_limits<double>::quiet_NaN(); EXPECT_EQ(fmt::format("{}", nan), "nan"); EXPECT_EQ(fmt::format("{:+}", nan), "+nan"); EXPECT_EQ(fmt::format("{:+06}", nan), " +nan"); EXPECT_EQ(fmt::format("{:<+06}", nan), "+nan "); EXPECT_EQ(fmt::format("{:^+06}", nan), " +nan "); EXPECT_EQ(fmt::format("{:>+06}", nan), " +nan"); if (std::signbit(-nan)) { EXPECT_EQ(fmt::format("{}", -nan), "-nan"); EXPECT_EQ(fmt::format("{:+06}", -nan), " -nan"); } else { fmt::print("Warning: compiler doesn't handle negative NaN correctly"); } EXPECT_EQ(fmt::format("{: }", nan), " nan"); EXPECT_EQ(fmt::format("{:F}", nan), "NAN"); EXPECT_EQ(fmt::format("{:<7}", nan), "nan "); EXPECT_EQ(fmt::format("{:^7}", nan), " nan "); EXPECT_EQ(fmt::format("{:>7}", nan), " nan"); } TEST(format_test, format_infinity) { double inf = std::numeric_limits<double>::infinity(); EXPECT_EQ(fmt::format("{}", inf), "inf"); EXPECT_EQ(fmt::format("{:+}", inf), "+inf"); EXPECT_EQ(fmt::format("{}", -inf), "-inf"); EXPECT_EQ(fmt::format("{:+06}", inf), " +inf"); EXPECT_EQ(fmt::format("{:+06}", -inf), " -inf"); EXPECT_EQ(fmt::format("{:<+06}", inf), "+inf "); EXPECT_EQ(fmt::format("{:^+06}", inf), " +inf "); EXPECT_EQ(fmt::format("{:>+06}", inf), " +inf"); EXPECT_EQ(fmt::format("{: }", inf), " inf"); EXPECT_EQ(fmt::format("{:F}", inf), "INF"); EXPECT_EQ(fmt::format("{:<7}", inf), "inf "); EXPECT_EQ(fmt::format("{:^7}", inf), " inf "); EXPECT_EQ(fmt::format("{:>7}", inf), " inf"); } TEST(format_test, format_long_double) { EXPECT_EQ(fmt::format("{0:}", 0.0l), "0"); EXPECT_EQ(fmt::format("{0:f}", 0.0l), "0.000000"); EXPECT_EQ(fmt::format("{:.1f}", 0.000000001l), "0.0"); EXPECT_EQ(fmt::format("{:.2f}", 0.099l), "0.10"); EXPECT_EQ(fmt::format("{0:}", 392.65l), "392.65"); EXPECT_EQ(fmt::format("{0:g}", 392.65l), "392.65"); EXPECT_EQ(fmt::format("{0:G}", 392.65l), "392.65"); EXPECT_EQ(fmt::format("{0:f}", 392.65l), "392.650000"); EXPECT_EQ(fmt::format("{0:F}", 392.65l), "392.650000"); char buffer[buffer_size]; safe_sprintf(buffer, "%Le", 392.65l); EXPECT_EQ(buffer, fmt::format("{0:e}", 392.65l)); EXPECT_EQ(fmt::format("{0:+010.4g}", 392.64l), "+0000392.6"); auto ld = 3.31l; if (fmt::detail::is_double_double<decltype(ld)>::value) { safe_sprintf(buffer, "%a", static_cast<double>(ld)); EXPECT_EQ(buffer, fmt::format("{:a}", ld)); } else if (std::numeric_limits<long double>::digits == 64) { EXPECT_EQ(fmt::format("{:a}", ld), "0xd.3d70a3d70a3d70ap-2"); } } TEST(format_test, format_char) { const char types[] = "cbBdoxX"; check_unknown_types('a', types, "char"); EXPECT_EQ(fmt::format("{0}", 'a'), "a"); EXPECT_EQ(fmt::format("{0:c}", 'z'), "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(fmt::format("{}", '\n'), "\n"); EXPECT_EQ(fmt::format("{:?}", '\n'), "'\\n'"); EXPECT_EQ(fmt::format("{:x}", '\xff'), "ff"); } TEST(format_test, format_volatile_char) { volatile char c = 'x'; EXPECT_EQ(fmt::format("{}", c), "x"); } TEST(format_test, format_unsigned_char) { EXPECT_EQ(fmt::format("{}", static_cast<unsigned char>(42)), "42"); EXPECT_EQ(fmt::format("{}", static_cast<uint8_t>(42)), "42"); } TEST(format_test, format_cstring) { check_unknown_types("test", "sp", "string"); EXPECT_EQ(fmt::format("{0}", "test"), "test"); EXPECT_EQ(fmt::format("{0:s}", "test"), "test"); char nonconst[] = "nonconst"; EXPECT_EQ(fmt::format("{0}", nonconst), "nonconst"); auto nullstr = static_cast<const char*>(nullptr); EXPECT_THROW_MSG((void)fmt::format("{}", nullstr), format_error, "string pointer is null"); EXPECT_THROW_MSG((void)fmt::format("{:s}", nullstr), 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(fmt::format("{0}", static_cast<void*>(nullptr)), "0x0"); EXPECT_EQ(fmt::format("{0}", reinterpret_cast<void*>(0x1234)), "0x1234"); EXPECT_EQ(fmt::format("{0:p}", reinterpret_cast<void*>(0x1234)), "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))); struct custom_deleter { void operator()(int* p) const { delete p; } }; std::unique_ptr<int, custom_deleter> upcd(new int(1)); EXPECT_EQ(fmt::format("{}", fmt::ptr(upcd.get())), fmt::format("{}", fmt::ptr(upcd))); 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(fmt::format("{}", nullptr), "0x0"); } 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(fmt::format("{}", string_view("test")), "test"); EXPECT_EQ(fmt::format("{:?}", string_view("t\nst")), "\"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(fmt::format("{}", std::string_view("test")), "test"); EXPECT_EQ(fmt::format("{}", string_viewable()), "foo"); } 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 fmt::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 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()) { // Namespace-qualify to avoid ambiguity with std::format_to. fmt::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(fmt::format("{0}", Answer()), "42"); EXPECT_EQ(fmt::format("{:04}", Answer()), "0042"); } TEST(format_test, format_to_custom) { char buf[10] = {}; auto end = fmt::format_to(buf, "{}", 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(fmt::format("{}", 42), "42"); memory_buffer out; fmt::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(fmt::format("Bring me a {}", "shrubbery"), "Bring me a shrubbery"); EXPECT_EQ(fmt::format("From {} to {}", 1, 3), "From 1 to 3"); char buffer[buffer_size]; safe_sprintf(buffer, "%03.2f", -1.2); EXPECT_EQ(buffer, fmt::format("{:03.2f}", -1.2)); EXPECT_EQ(fmt::format("{0}, {1}, {2}", 'a', 'b', 'c'), "a, b, c"); EXPECT_EQ(fmt::format("{}, {}, {}", 'a', 'b', 'c'), "a, b, c"); EXPECT_EQ(fmt::format("{2}, {1}, {0}", 'a', 'b', 'c'), "c, b, a"); EXPECT_EQ(fmt::format("{0}{1}{0}", "abra", "cad"), "abracadabra"); 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(fmt::format("{:+f}; {:+f}", 3.14, -3.14), "+3.140000; -3.140000"); EXPECT_EQ(fmt::format("{: f}; {: f}", 3.14, -3.14), " 3.140000; -3.140000"); EXPECT_EQ(fmt::format("{:-f}; {:-f}", 3.14, -3.14), "3.140000; -3.140000"); 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(fmt::format("The answer is {}", 42), "The answer is 42"); EXPECT_THROW_MSG( (void)fmt::format(runtime("The answer is {:d}"), "forty-two"), format_error, "invalid format 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!"); EXPECT_WRITE(stdout, fmt::println("Don't {}!", "panic"), "Don't panic!\n"); EXPECT_WRITE(stderr, fmt::println(stderr, "Don't {}!", "panic"), "Don't panic!\n"); } TEST(format_test, variadic) { EXPECT_EQ(fmt::format("{}c{}", "ab", 1), "abc1"); } 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"); } #ifdef __cpp_generic_lambdas struct point { double x, y; }; FMT_BEGIN_NAMESPACE template <> struct formatter<point> : nested_formatter<double> { auto format(point p, format_context& ctx) const -> decltype(ctx.out()) { return write_padded(ctx, [this, p](auto out) -> decltype(out) { return fmt::format_to(out, "({}, {})", nested(p.x), nested(p.y)); }); } }; FMT_END_NAMESPACE TEST(format_test, nested_formatter) { EXPECT_EQ(fmt::format("{:>16.2f}", point{1, 2}), " (1.00, 2.00)"); } #endif // __cpp_generic_lambdas 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(fmt::format("({})", join(v1, v1 + 3, ", ")), "(1, 2, 3)"); EXPECT_EQ(fmt::format("({})", join(v1, v1 + 1, ", ")), "(1)"); EXPECT_EQ(fmt::format("({})", join(v1, v1, ", ")), "()"); EXPECT_EQ(fmt::format("({:03})", join(v1, v1 + 3, ", ")), "(001, 002, 003)"); EXPECT_EQ("(+01.20, +03.40)", fmt::format("({:+06.2f})", join(v2.begin(), v2.end(), ", "))); EXPECT_EQ(fmt::format("{0:{1}}", join(v1, v1 + 3, ", "), 1), "1, 2, 3"); EXPECT_EQ(fmt::format("{}, {}", v3[0], v3[1]), fmt::format("{}", join(v3, v3 + 2, ", "))); EXPECT_EQ(fmt::format("({})", join(v1, ", ")), "(1, 2, 3)"); EXPECT_EQ(fmt::format("({:+06.2f})", join(v2, ", ")), "(+01.20, +03.40)"); auto v4 = std::vector<test_enum>{foo, bar, foo}; EXPECT_EQ(fmt::format("{}", join(v4, " ")), "0 1 0"); } #ifdef __cpp_lib_byte 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(); fmt::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')); } 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(fmt::format(FMT_STRING("foo")), "foo"); EXPECT_EQ(fmt::format(FMT_STRING("{}"), 42), "42"); #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(fmt::format(FMT_STRING("{answer}"), "answer"_a = Answer()), "42"); EXPECT_EQ(fmt::format(FMT_STRING("{} {two}"), 1, "two"_a = 2), "1 2"); #endif (void)static_with_null; (void)static_no_null; #ifndef _MSC_VER EXPECT_EQ(fmt::format(FMT_STRING(static_with_null), 42), "42"); EXPECT_EQ(fmt::format(FMT_STRING(static_no_null), 42), "42"); #endif (void)with_null; (void)no_null; #if FMT_CPLUSPLUS >= 201703L EXPECT_EQ(fmt::format(FMT_STRING(with_null), 42), "42"); EXPECT_EQ(fmt::format(FMT_STRING(no_null), 42), "42"); #endif #if defined(FMT_USE_STRING_VIEW) && FMT_CPLUSPLUS >= 201703L EXPECT_EQ(fmt::format(FMT_STRING(std::string_view("{}")), 42), "42"); #endif } TEST(format_test, custom_format_compile_time_string) { EXPECT_EQ(fmt::format(FMT_STRING("{}"), Answer()), "42"); auto answer = Answer(); EXPECT_EQ(fmt::format(FMT_STRING("{}"), answer), "42"); char buf[10] = {}; fmt::format_to(buf, FMT_STRING("{}"), answer); const Answer const_answer = Answer(); EXPECT_EQ(fmt::format(FMT_STRING("{}"), const_answer), "42"); } #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(fmt::format("{answer}", "answer"_a = Answer()), "42"); } #endif // FMT_USE_USER_DEFINED_LITERALS TEST(format_test, enum) { EXPECT_EQ(fmt::format("{}", foo), "0"); } 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(fmt::format("{}", big_enum_value), "5000000000"); } #endif TEST(format_test, non_null_terminated_format_string) { EXPECT_EQ(fmt::format(string_view("{}foo", 2), 42), "42"); } 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> { auto format(adl_test::fmt::detail::foo, format_context& ctx) -> decltype(ctx.out()) { return formatter<std::string>::format("foo", ctx); } }; FMT_END_NAMESPACE 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(foo), "0"); #if FMT_USE_FLOAT128 EXPECT_EQ(fmt::to_string(__float128(0.5)), "0.5"); #endif #if defined(FMT_USE_STRING_VIEW) && FMT_CPLUSPLUS >= 201703L EXPECT_EQ(fmt::to_string(std::string_view()), ""); #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)); EXPECT_EQ(2u, fmt::formatted_size(std::locale(), "{}", 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; auto operator++() -> test_output_iterator& { ++data; return *this; } auto operator++(int) -> test_output_iterator { auto tmp = *this; ++data; return tmp; } auto operator*() -> char& { 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"); } TEST(format_test, vformat_to) { using context = fmt::format_context; int n = 42; auto args = fmt::make_format_args<context>(n); auto s = std::string(); fmt::vformat_to(std::back_inserter(s), "{}", args); EXPECT_EQ(s, "42"); s.clear(); fmt::vformat_to(std::back_inserter(s), FMT_STRING("{}"), args); EXPECT_EQ(s, "42"); } TEST(format_test, char_traits_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> { FMT_CONSTEXPR 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"); } namespace test { enum class scoped_enum_as_int {}; auto format_as(scoped_enum_as_int) -> int { return 42; } enum class scoped_enum_as_string_view {}; auto format_as(scoped_enum_as_string_view) -> fmt::string_view { return "foo"; } enum class scoped_enum_as_string {}; auto format_as(scoped_enum_as_string) -> std::string { return "foo"; } struct struct_as_int {}; auto format_as(struct_as_int) -> int { return 42; } struct struct_as_const_reference { const std::string name = "foo"; }; auto format_as(const struct_as_const_reference& s) -> const std::string& { return s.name; } } // namespace test TEST(format_test, format_as) { EXPECT_EQ(fmt::format("{}", test::scoped_enum_as_int()), "42"); EXPECT_EQ(fmt::format("{}", test::scoped_enum_as_string_view()), "foo"); EXPECT_EQ(fmt::format("{}", test::scoped_enum_as_string()), "foo"); EXPECT_EQ(fmt::format("{}", test::struct_as_int()), "42"); EXPECT_EQ(fmt::format("{}", test::struct_as_const_reference()), "foo"); } TEST(format_test, format_as_to_string) { EXPECT_EQ(fmt::to_string(test::scoped_enum_as_int()), "42"); EXPECT_EQ(fmt::to_string(test::scoped_enum_as_string_view()), "foo"); EXPECT_EQ(fmt::to_string(test::scoped_enum_as_string()), "foo"); EXPECT_EQ(fmt::to_string(test::struct_as_int()), "42"); } template <typename Char, typename T> auto check_enabled_formatter() -> bool { 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(std::string(format_int.data(), format_int.size()), "42"); } TEST(format_int_test, format_int) { EXPECT_EQ(fmt::format_int(42).str(), "42"); EXPECT_EQ(fmt::format_int(42).size(), 2u); EXPECT_EQ(fmt::format_int(-42).str(), "-42"); EXPECT_EQ(fmt::format_int(-42).size(), 3u); EXPECT_EQ(fmt::format_int(42ul).str(), "42"); EXPECT_EQ(fmt::format_int(-42l).str(), "-42"); EXPECT_EQ(fmt::format_int(42ull).str(), "42"); EXPECT_EQ(fmt::format_int(-42ll).str(), "-42");\ EXPECT_EQ(fmt::format_int(max_value<int64_t>()).str(), std::to_string(max_value<int64_t>())); } #ifndef FMT_STATIC_THOUSANDS_SEPARATOR # include <locale> class format_facet : public fmt::format_facet<std::locale> { protected: struct int_formatter { fmt::appender out; template <typename T, FMT_ENABLE_IF(fmt::detail::is_integer<T>::value)> auto operator()(T value) -> bool { fmt::format_to(out, "[{}]", value); return true; } template <typename T, FMT_ENABLE_IF(!fmt::detail::is_integer<T>::value)> auto operator()(T) -> bool { return false; } }; auto do_put(fmt::appender out, fmt::loc_value val, const fmt::format_specs<>&) const -> bool override; }; auto format_facet::do_put(fmt::appender out, fmt::loc_value val, const fmt::format_specs<>&) const -> bool { return val.visit(int_formatter{out}); } TEST(format_test, format_facet) { auto loc = std::locale(std::locale(), new format_facet()); EXPECT_EQ(fmt::format(loc, "{:L}", 42), "[42]"); EXPECT_EQ(fmt::format(loc, "{:L}", -42), "[-42]"); } TEST(format_test, format_facet_separator) { // U+2019 RIGHT SINGLE QUOTATION MARK is a digit separator in the de_CH // locale. auto loc = std::locale({}, new fmt::format_facet<std::locale>("\xe2\x80\x99")); EXPECT_EQ(fmt::format(loc, "{:L}", 1000), "1\xe2\x80\x99" "000"); } TEST(format_test, format_facet_grouping) { auto loc = std::locale({}, new fmt::format_facet<std::locale>(",", {1, 2, 3})); EXPECT_EQ(fmt::format(loc, "{:L}", 1234567890), "1,234,567,89,0"); } TEST(format_test, format_named_arg_with_locale) { EXPECT_EQ(fmt::format(std::locale(), "{answer}", fmt::arg("answer", 42)), "42"); } TEST(format_test, format_locale) { auto loc = std::locale({}, new fmt::format_facet<std::locale>(",")); EXPECT_EQ(fmt::format(loc, "{:Lx}", 123456789), "7,5bc,d15"); EXPECT_EQ(fmt::format(loc, "{:#Lb}", -123456789), "-0b111,010,110,111,100,110,100,010,101"); EXPECT_EQ(fmt::format(loc, "{:10Lo}", 12345), " 30,071"); } #endif // FMT_STATIC_THOUSANDS_SEPARATOR struct convertible_to_nonconst_cstring { operator char*() const { static char c[] = "bar"; return c; } }; FMT_BEGIN_NAMESPACE template <> struct formatter<convertible_to_nonconst_cstring> : formatter<char*> {}; FMT_END_NAMESPACE TEST(format_test, formatter_nonconst_char) { EXPECT_EQ(fmt::format("{}", convertible_to_nonconst_cstring()), "bar"); }