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Diffstat (limited to 'src/fmt/test/format-test.cc')
| -rw-r--r-- | src/fmt/test/format-test.cc | 2446 |
1 files changed, 2446 insertions, 0 deletions
diff --git a/src/fmt/test/format-test.cc b/src/fmt/test/format-test.cc new file mode 100644 index 000000000..dfdf2e451 --- /dev/null +++ b/src/fmt/test/format-test.cc @@ -0,0 +1,2446 @@ +// Formatting library for C++ - formatting library tests +// +// Copyright (c) 2012 - present, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +#include <stdint.h> + +#include <cctype> +#include <cfloat> +#include <climits> +#include <cmath> +#include <cstring> +#include <list> +#include <memory> +#include <string> + +// Check if fmt/format.h compiles with windows.h included before it. +#ifdef _WIN32 +# include <windows.h> +#endif + +// Check if fmt/format.h compiles with the X11 index macro defined. +#define index(x, y) no nice things + +#include "fmt/color.h" +#include "fmt/format.h" + +#undef index + +#include "gmock.h" +#include "gtest-extra.h" +#include "mock-allocator.h" +#include "util.h" + +#undef ERROR + +using fmt::basic_memory_buffer; +using fmt::format; +using fmt::format_error; +using fmt::memory_buffer; +using fmt::string_view; +using fmt::wmemory_buffer; +using fmt::wstring_view; +using fmt::detail::max_value; + +using testing::Return; +using testing::StrictMock; + +namespace { + +#if !FMT_GCC_VERSION || FMT_GCC_VERSION >= 408 +template <typename Char, typename T> bool check_enabled_formatter() { + static_assert(std::is_default_constructible<fmt::formatter<T, Char>>::value, + ""); + return true; +} + +template <typename Char, typename... T> void check_enabled_formatters() { + auto dummy = {check_enabled_formatter<Char, T>()...}; + (void)dummy; +} + +TEST(FormatterTest, TestFormattersEnabled) { + 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>(); +} +#endif + +// Format value using the standard library. +template <typename Char, typename T> +void std_format(const T& value, std::basic_string<Char>& result) { + std::basic_ostringstream<Char> os; + os << value; + result = os.str(); +} + +#ifdef __MINGW32__ +// Workaround a bug in formatting long double in MinGW. +void std_format(long double value, std::string& result) { + char buffer[100]; + safe_sprintf(buffer, "%Lg", value); + result = buffer; +} +void std_format(long double value, std::wstring& result) { + wchar_t buffer[100]; + swprintf(buffer, L"%Lg", value); + result = buffer; +} +#endif +} // namespace + +struct uint32_pair { + uint32_t u[2]; +}; + +TEST(UtilTest, BitCast) { + 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(~0ull)); + EXPECT_EQ(fmt::detail::bit_cast<uint64_t>(s), ~0ull); +} + +TEST(UtilTest, 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(UtilTest, ParseNonnegativeInt) { + if (max_value<int>() != static_cast<int>(static_cast<unsigned>(1) << 31)) { + fmt::print("Skipping parse_nonnegative_int test\n"); + return; + } + fmt::string_view s = "10000000000"; + auto begin = s.begin(), end = s.end(); + EXPECT_THROW_MSG( + parse_nonnegative_int(begin, end, fmt::detail::error_handler()), + fmt::format_error, "number is too big"); + s = "2147483649"; + begin = s.begin(); + end = s.end(); + EXPECT_THROW_MSG( + parse_nonnegative_int(begin, end, fmt::detail::error_handler()), + fmt::format_error, "number is too big"); +} + +TEST(IteratorTest, CountingIterator) { + fmt::detail::counting_iterator it; + auto prev = it++; + EXPECT_EQ(prev.count(), 0); + EXPECT_EQ(it.count(), 1); +} + +TEST(IteratorTest, TruncatingIterator) { + char* p = nullptr; + fmt::detail::truncating_iterator<char*> it(p, 3); + auto prev = it++; + EXPECT_EQ(prev.base(), p); + EXPECT_EQ(it.base(), p + 1); +} + +TEST(IteratorTest, TruncatingBackInserter) { + std::string buffer; + auto bi = std::back_inserter(buffer); + fmt::detail::truncating_iterator<decltype(bi)> it(bi, 2); + *it++ = '4'; + *it++ = '2'; + *it++ = '1'; + EXPECT_EQ(buffer.size(), 2); + EXPECT_EQ(buffer, "42"); +} + +TEST(IteratorTest, IsOutputIterator) { + EXPECT_TRUE(fmt::detail::is_output_iterator<char*>::value); + EXPECT_FALSE(fmt::detail::is_output_iterator<const char*>::value); + EXPECT_FALSE(fmt::detail::is_output_iterator<std::string>::value); + EXPECT_TRUE(fmt::detail::is_output_iterator< + std::back_insert_iterator<std::string>>::value); + EXPECT_TRUE(fmt::detail::is_output_iterator<std::string::iterator>::value); + EXPECT_FALSE( + fmt::detail::is_output_iterator<std::string::const_iterator>::value); + EXPECT_FALSE(fmt::detail::is_output_iterator<std::list<char>>::value); + EXPECT_TRUE( + fmt::detail::is_output_iterator<std::list<char>::iterator>::value); + EXPECT_FALSE( + fmt::detail::is_output_iterator<std::list<char>::const_iterator>::value); + EXPECT_FALSE(fmt::detail::is_output_iterator<uint32_pair>::value); +} + +TEST(MemoryBufferTest, Ctor) { + basic_memory_buffer<char, 123> buffer; + EXPECT_EQ(static_cast<size_t>(0), buffer.size()); + EXPECT_EQ(123u, buffer.capacity()); +} + +static void check_forwarding(mock_allocator<int>& alloc, + allocator_ref<mock_allocator<int>>& 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(testing::Return(ptr)); + ref.allocate(42); + EXPECT_CALL(alloc, deallocate(ptr, 42)); + ref.deallocate(ptr, 42); +} + +TEST(AllocatorTest, allocator_ref) { + StrictMock<mock_allocator<int>> alloc; + typedef allocator_ref<mock_allocator<int>> test_allocator_ref; + test_allocator_ref 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); +} + +typedef allocator_ref<std::allocator<char>> TestAllocator; + +static void check_move_buffer( + const char* str, basic_memory_buffer<char, 5, TestAllocator>& buffer) { + std::allocator<char>* alloc = buffer.get_allocator().get(); + basic_memory_buffer<char, 5, TestAllocator> 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()); +} + +TEST(MemoryBufferTest, MoveCtorInlineBuffer) { + std::allocator<char> alloc; + basic_memory_buffer<char, 5, TestAllocator> buffer((TestAllocator(&alloc))); + const char test[] = "test"; + buffer.append(test, 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(MemoryBufferTest, MoveCtorDynamicBuffer) { + std::allocator<char> alloc; + basic_memory_buffer<char, 4, TestAllocator> buffer((TestAllocator(&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, TestAllocator> buffer2(std::move(buffer)); + // Move should rip the guts of the first buffer. + EXPECT_EQ(inline_buffer_ptr, &buffer[0]); + EXPECT_EQ("testa", std::string(&buffer2[0], buffer2.size())); + EXPECT_GT(buffer2.capacity(), 4u); +} + +static 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(MemoryBufferTest, MoveAssignment) { + 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(MemoryBufferTest, Grow) { + typedef allocator_ref<mock_allocator<int>> Allocator; + typedef basic_memory_buffer<int, 10, Allocator> Base; + mock_allocator<int> alloc; + struct TestMemoryBuffer : Base { + TestMemoryBuffer(Allocator alloc) : Base(alloc) {} + void grow(size_t size) { Base::grow(size); } + } 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.grow(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(MemoryBufferTest, Allocator) { + typedef allocator_ref<mock_allocator<char>> TestAllocator; + basic_memory_buffer<char, 10, TestAllocator> buffer; + EXPECT_EQ(nullptr, buffer.get_allocator().get()); + StrictMock<mock_allocator<char>> alloc; + char mem; + { + basic_memory_buffer<char, 10, TestAllocator> buffer2( + (TestAllocator(&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(MemoryBufferTest, ExceptionInDeallocate) { + typedef allocator_ref<mock_allocator<char>> TestAllocator; + StrictMock<mock_allocator<char>> alloc; + basic_memory_buffer<char, 10, TestAllocator> buffer((TestAllocator(&alloc))); + size_t size = 2 * fmt::inline_buffer_size; + std::vector<char> mem(size); + { + EXPECT_CALL(alloc, allocate(size)).WillOnce(Return(&mem[0])); + buffer.resize(size); + std::fill(&buffer[0], &buffer[0] + size, 'x'); + } + std::vector<char> mem2(2 * size); + { + EXPECT_CALL(alloc, allocate(2 * size)).WillOnce(Return(&mem2[0])); + std::exception e; + 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)); +} + +TEST(UtilTest, UTF8ToUTF16) { + fmt::detail::utf8_to_utf16 u("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(UtilTest, UTF8ToUTF16EmptyString) { + std::string s = ""; + fmt::detail::utf8_to_utf16 u(s.c_str()); + EXPECT_EQ(L"", u.str()); + EXPECT_EQ(s.size(), u.size()); +} + +TEST(UtilTest, FormatSystemError) { + fmt::memory_buffer message; + fmt::format_system_error(message, EDOM, "test"); + EXPECT_EQ(fmt::format("test: {}", get_system_error(EDOM)), + to_string(message)); + 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 { + std::allocator<char> alloc; + 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", max_size); + return; + } + fmt::format_system_error(message, EDOM, fmt::string_view(nullptr, max_size)); + EXPECT_EQ(fmt::format("error {}", EDOM), to_string(message)); +} + +TEST(UtilTest, SystemError) { + fmt::system_error e(EDOM, "test"); + EXPECT_EQ(fmt::format("test: {}", get_system_error(EDOM)), e.what()); + EXPECT_EQ(EDOM, e.error_code()); + + fmt::system_error error(0, ""); + try { + throw fmt::system_error(EDOM, "test {}", "error"); + } catch (const fmt::system_error& e) { + error = e; + } + fmt::memory_buffer message; + fmt::format_system_error(message, EDOM, "test error"); + EXPECT_EQ(to_string(message), error.what()); + EXPECT_EQ(EDOM, error.error_code()); +} + +TEST(UtilTest, ReportSystemError) { + 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(StringViewTest, Ctor) { + EXPECT_STREQ("abc", string_view("abc").data()); + EXPECT_EQ(3u, string_view("abc").size()); + + EXPECT_STREQ("defg", string_view(std::string("defg")).data()); + EXPECT_EQ(4u, string_view(std::string("defg")).size()); +} + +TEST(FormatToTest, FormatWithoutArgs) { + std::string s; + fmt::format_to(std::back_inserter(s), "test"); + EXPECT_EQ("test", s); +} + +TEST(FormatToTest, Format) { + 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(FormatToTest, WideString) { + std::vector<wchar_t> buf; + fmt::format_to(std::back_inserter(buf), L"{}{}", 42, L'\0'); + EXPECT_STREQ(buf.data(), L"42"); +} + +TEST(FormatToTest, FormatToMemoryBuffer) { + fmt::basic_memory_buffer<char, 100> buffer; + fmt::format_to(buffer, "{}", "foo"); + EXPECT_EQ("foo", to_string(buffer)); + fmt::wmemory_buffer wbuffer; + fmt::format_to(wbuffer, L"{}", L"foo"); + EXPECT_EQ(L"foo", to_string(wbuffer)); +} + +TEST(FormatterTest, Escape) { + EXPECT_EQ("{", format("{{")); + EXPECT_EQ("before {", format("before {{")); + EXPECT_EQ("{ after", format("{{ after")); + EXPECT_EQ("before { after", format("before {{ after")); + + EXPECT_EQ("}", format("}}")); + EXPECT_EQ("before }", format("before }}")); + EXPECT_EQ("} after", format("}} after")); + EXPECT_EQ("before } after", format("before }} after")); + + EXPECT_EQ("{}", format("{{}}")); + EXPECT_EQ("{42}", format("{{{0}}}", 42)); +} + +TEST(FormatterTest, UnmatchedBraces) { + EXPECT_THROW_MSG(format("{"), format_error, "invalid format string"); + EXPECT_THROW_MSG(format("}"), format_error, "unmatched '}' in format string"); + EXPECT_THROW_MSG(format("{0{}"), format_error, "invalid format string"); +} + +TEST(FormatterTest, NoArgs) { EXPECT_EQ("test", format("test")); } + +TEST(FormatterTest, ArgsInDifferentPositions) { + EXPECT_EQ("42", format("{0}", 42)); + EXPECT_EQ("before 42", format("before {0}", 42)); + EXPECT_EQ("42 after", format("{0} after", 42)); + EXPECT_EQ("before 42 after", format("before {0} after", 42)); + EXPECT_EQ("answer = 42", format("{0} = {1}", "answer", 42)); + EXPECT_EQ("42 is the answer", format("{1} is the {0}", "answer", 42)); + EXPECT_EQ("abracadabra", format("{0}{1}{0}", "abra", "cad")); +} + +TEST(FormatterTest, ArgErrors) { + EXPECT_THROW_MSG(format("{"), format_error, "invalid format string"); + EXPECT_THROW_MSG(format("{?}"), format_error, "invalid format string"); + EXPECT_THROW_MSG(format("{0"), format_error, "invalid format string"); + EXPECT_THROW_MSG(format("{0}"), format_error, "argument not found"); + EXPECT_THROW_MSG(format("{00}", 42), format_error, "invalid format string"); + + char format_str[BUFFER_SIZE]; + safe_sprintf(format_str, "{%u", INT_MAX); + EXPECT_THROW_MSG(format(format_str), format_error, "invalid format string"); + safe_sprintf(format_str, "{%u}", INT_MAX); + EXPECT_THROW_MSG(format(format_str), format_error, "argument not found"); + + safe_sprintf(format_str, "{%u", INT_MAX + 1u); + EXPECT_THROW_MSG(format(format_str), format_error, "number is too big"); + safe_sprintf(format_str, "{%u}", INT_MAX + 1u); + EXPECT_THROW_MSG(format(format_str), format_error, "number is too big"); +} + +template <int N> struct TestFormat { + template <typename... Args> + static std::string format(fmt::string_view format_str, const Args&... args) { + return TestFormat<N - 1>::format(format_str, N - 1, args...); + } +}; + +template <> struct TestFormat<0> { + template <typename... Args> + static std::string format(fmt::string_view format_str, const Args&... args) { + return fmt::format(format_str, args...); + } +}; + +TEST(FormatterTest, ManyArgs) { + EXPECT_EQ("19", TestFormat<20>::format("{19}")); + EXPECT_THROW_MSG(TestFormat<20>::format("{20}"), format_error, + "argument not found"); + EXPECT_THROW_MSG(TestFormat<21>::format("{21}"), format_error, + "argument not found"); + enum { max_packed_args = fmt::detail::max_packed_args }; + std::string format_str = fmt::format("{{{}}}", max_packed_args + 1); + EXPECT_THROW_MSG(TestFormat<max_packed_args>::format(format_str), + format_error, "argument not found"); +} + +TEST(FormatterTest, NamedArg) { + EXPECT_EQ("1/a/A", format("{_1}/{a_}/{A_}", fmt::arg("a_", 'a'), + fmt::arg("A_", "A"), fmt::arg("_1", 1))); + EXPECT_THROW_MSG(format("{a}"), format_error, "argument not found"); + EXPECT_EQ(" -42", format("{0:{width}}", -42, fmt::arg("width", 4))); + EXPECT_EQ("st", format("{0:.{precision}}", "str", fmt::arg("precision", 2))); + EXPECT_EQ("1 2", format("{} {two}", 1, fmt::arg("two", 2))); + EXPECT_EQ("42", 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))); +} + +TEST(FormatterTest, AutoArgIndex) { + EXPECT_EQ("abc", format("{}{}{}", 'a', 'b', 'c')); + EXPECT_THROW_MSG(format("{0}{}", 'a', 'b'), format_error, + "cannot switch from manual to automatic argument indexing"); + EXPECT_THROW_MSG(format("{}{0}", 'a', 'b'), format_error, + "cannot switch from automatic to manual argument indexing"); + EXPECT_EQ("1.2", format("{:.{}}", 1.2345, 2)); + EXPECT_THROW_MSG(format("{0}:.{}", 1.2345, 2), format_error, + "cannot switch from manual to automatic argument indexing"); + EXPECT_THROW_MSG(format("{:.{0}}", 1.2345, 2), format_error, + "cannot switch from automatic to manual argument indexing"); + EXPECT_THROW_MSG(format("{}"), format_error, "argument not found"); +} + +TEST(FormatterTest, EmptySpecs) { EXPECT_EQ("42", format("{0:}", 42)); } + +TEST(FormatterTest, LeftAlign) { + EXPECT_EQ("42 ", format("{0:<4}", 42)); + EXPECT_EQ("42 ", format("{0:<4o}", 042)); + EXPECT_EQ("42 ", format("{0:<4x}", 0x42)); + EXPECT_EQ("-42 ", format("{0:<5}", -42)); + EXPECT_EQ("42 ", format("{0:<5}", 42u)); + EXPECT_EQ("-42 ", format("{0:<5}", -42l)); + EXPECT_EQ("42 ", format("{0:<5}", 42ul)); + EXPECT_EQ("-42 ", format("{0:<5}", -42ll)); + EXPECT_EQ("42 ", format("{0:<5}", 42ull)); + EXPECT_EQ("-42.0 ", format("{0:<7}", -42.0)); + EXPECT_EQ("-42.0 ", format("{0:<7}", -42.0l)); + EXPECT_EQ("c ", format("{0:<5}", 'c')); + EXPECT_EQ("abc ", format("{0:<5}", "abc")); + EXPECT_EQ("0xface ", format("{0:<8}", reinterpret_cast<void*>(0xface))); +} + +TEST(FormatterTest, RightAlign) { + EXPECT_EQ(" 42", format("{0:>4}", 42)); + EXPECT_EQ(" 42", format("{0:>4o}", 042)); + EXPECT_EQ(" 42", format("{0:>4x}", 0x42)); + EXPECT_EQ(" -42", format("{0:>5}", -42)); + EXPECT_EQ(" 42", format("{0:>5}", 42u)); + EXPECT_EQ(" -42", format("{0:>5}", -42l)); + EXPECT_EQ(" 42", format("{0:>5}", 42ul)); + EXPECT_EQ(" -42", format("{0:>5}", -42ll)); + EXPECT_EQ(" 42", format("{0:>5}", 42ull)); + EXPECT_EQ(" -42.0", format("{0:>7}", -42.0)); + EXPECT_EQ(" -42.0", format("{0:>7}", -42.0l)); + EXPECT_EQ(" c", format("{0:>5}", 'c')); + EXPECT_EQ(" abc", format("{0:>5}", "abc")); + EXPECT_EQ(" 0xface", format("{0:>8}", reinterpret_cast<void*>(0xface))); +} + +#if FMT_NUMERIC_ALIGN +TEST(FormatterTest, NumericAlign) { EXPECT_EQ("0042", format("{0:=4}", 42)); } +#endif + +TEST(FormatterTest, CenterAlign) { + EXPECT_EQ(" 42 ", format("{0:^5}", 42)); + EXPECT_EQ(" 42 ", format("{0:^5o}", 042)); + EXPECT_EQ(" 42 ", format("{0:^5x}", 0x42)); + EXPECT_EQ(" -42 ", format("{0:^5}", -42)); + EXPECT_EQ(" 42 ", format("{0:^5}", 42u)); + EXPECT_EQ(" -42 ", format("{0:^5}", -42l)); + EXPECT_EQ(" 42 ", format("{0:^5}", 42ul)); + EXPECT_EQ(" -42 ", format("{0:^5}", -42ll)); + EXPECT_EQ(" 42 ", format("{0:^5}", 42ull)); + EXPECT_EQ(" -42.0 ", format("{0:^7}", -42.0)); + EXPECT_EQ(" -42.0 ", format("{0:^7}", -42.0l)); + EXPECT_EQ(" c ", format("{0:^5}", 'c')); + EXPECT_EQ(" abc ", format("{0:^6}", "abc")); + EXPECT_EQ(" 0xface ", format("{0:^8}", reinterpret_cast<void*>(0xface))); +} + +TEST(FormatterTest, Fill) { + EXPECT_THROW_MSG(format("{0:{<5}", 'c'), format_error, + "invalid fill character '{'"); + EXPECT_THROW_MSG(format("{0:{<5}}", 'c'), format_error, + "invalid fill character '{'"); + EXPECT_EQ("**42", format("{0:*>4}", 42)); + EXPECT_EQ("**-42", format("{0:*>5}", -42)); + EXPECT_EQ("***42", format("{0:*>5}", 42u)); + EXPECT_EQ("**-42", format("{0:*>5}", -42l)); + EXPECT_EQ("***42", format("{0:*>5}", 42ul)); + EXPECT_EQ("**-42", format("{0:*>5}", -42ll)); + EXPECT_EQ("***42", format("{0:*>5}", 42ull)); + EXPECT_EQ("**-42.0", format("{0:*>7}", -42.0)); + EXPECT_EQ("**-42.0", format("{0:*>7}", -42.0l)); + EXPECT_EQ("c****", format("{0:*<5}", 'c')); + EXPECT_EQ("abc**", format("{0:*<5}", "abc")); + EXPECT_EQ("**0xface", format("{0:*>8}", reinterpret_cast<void*>(0xface))); + EXPECT_EQ("foo=", format("{:}=", "foo")); + EXPECT_EQ(std::string("\0\0\0*", 4), format(string_view("{:\0>4}", 6), '*')); + EXPECT_EQ("жж42", format("{0:ж>4}", 42)); + EXPECT_THROW_MSG(format("{:\x80\x80\x80\x80\x80>}", 0), format_error, + "invalid fill"); +} + +TEST(FormatterTest, PlusSign) { + EXPECT_EQ("+42", format("{0:+}", 42)); + EXPECT_EQ("-42", format("{0:+}", -42)); + EXPECT_EQ("+42", format("{0:+}", 42)); + EXPECT_THROW_MSG(format("{0:+}", 42u), format_error, + "format specifier requires signed argument"); + EXPECT_EQ("+42", format("{0:+}", 42l)); + EXPECT_THROW_MSG(format("{0:+}", 42ul), format_error, + "format specifier requires signed argument"); + EXPECT_EQ("+42", format("{0:+}", 42ll)); + EXPECT_THROW_MSG(format("{0:+}", 42ull), format_error, + "format specifier requires signed argument"); + EXPECT_EQ("+42.0", format("{0:+}", 42.0)); + EXPECT_EQ("+42.0", format("{0:+}", 42.0l)); + EXPECT_THROW_MSG(format("{0:+", 'c'), format_error, + "missing '}' in format string"); + EXPECT_THROW_MSG(format("{0:+}", 'c'), format_error, + "invalid format specifier for char"); + EXPECT_THROW_MSG(format("{0:+}", "abc"), format_error, + "format specifier requires numeric argument"); + EXPECT_THROW_MSG(format("{0:+}", reinterpret_cast<void*>(0x42)), format_error, + "format specifier requires numeric argument"); +} + +TEST(FormatterTest, MinusSign) { + EXPECT_EQ("42", format("{0:-}", 42)); + EXPECT_EQ("-42", format("{0:-}", -42)); + EXPECT_EQ("42", format("{0:-}", 42)); + EXPECT_THROW_MSG(format("{0:-}", 42u), format_error, + "format specifier requires signed argument"); + EXPECT_EQ("42", format("{0:-}", 42l)); + EXPECT_THROW_MSG(format("{0:-}", 42ul), format_error, + "format specifier requires signed argument"); + EXPECT_EQ("42", format("{0:-}", 42ll)); + EXPECT_THROW_MSG(format("{0:-}", 42ull), format_error, + "format specifier requires signed argument"); + EXPECT_EQ("42.0", format("{0:-}", 42.0)); + EXPECT_EQ("42.0", format("{0:-}", 42.0l)); + EXPECT_THROW_MSG(format("{0:-", 'c'), format_error, + "missing '}' in format string"); + EXPECT_THROW_MSG(format("{0:-}", 'c'), format_error, + "invalid format specifier for char"); + EXPECT_THROW_MSG(format("{0:-}", "abc"), format_error, + "format specifier requires numeric argument"); + EXPECT_THROW_MSG(format("{0:-}", reinterpret_cast<void*>(0x42)), format_error, + "format specifier requires numeric argument"); +} + +TEST(FormatterTest, SpaceSign) { + EXPECT_EQ(" 42", format("{0: }", 42)); + EXPECT_EQ("-42", format("{0: }", -42)); + EXPECT_EQ(" 42", format("{0: }", 42)); + EXPECT_THROW_MSG(format("{0: }", 42u), format_error, + "format specifier requires signed argument"); + EXPECT_EQ(" 42", format("{0: }", 42l)); + EXPECT_THROW_MSG(format("{0: }", 42ul), format_error, + "format specifier requires signed argument"); + EXPECT_EQ(" 42", format("{0: }", 42ll)); + EXPECT_THROW_MSG(format("{0: }", 42ull), format_error, + "format specifier requires signed argument"); + EXPECT_EQ(" 42.0", format("{0: }", 42.0)); + EXPECT_EQ(" 42.0", format("{0: }", 42.0l)); + EXPECT_THROW_MSG(format("{0: ", 'c'), format_error, + "missing '}' in format string"); + EXPECT_THROW_MSG(format("{0: }", 'c'), format_error, + "invalid format specifier for char"); + EXPECT_THROW_MSG(format("{0: }", "abc"), format_error, + "format specifier requires numeric argument"); + EXPECT_THROW_MSG(format("{0: }", reinterpret_cast<void*>(0x42)), format_error, + "format specifier requires numeric argument"); +} + +TEST(FormatterTest, HashFlag) { + EXPECT_EQ("42", format("{0:#}", 42)); + EXPECT_EQ("-42", format("{0:#}", -42)); + EXPECT_EQ("0b101010", format("{0:#b}", 42)); + EXPECT_EQ("0B101010", format("{0:#B}", 42)); + EXPECT_EQ("-0b101010", format("{0:#b}", -42)); + EXPECT_EQ("0x42", format("{0:#x}", 0x42)); + EXPECT_EQ("0X42", format("{0:#X}", 0x42)); + EXPECT_EQ("-0x42", format("{0:#x}", -0x42)); + EXPECT_EQ("0", format("{0:#o}", 0)); + EXPECT_EQ("042", format("{0:#o}", 042)); + EXPECT_EQ("-042", format("{0:#o}", -042)); + EXPECT_EQ("42", format("{0:#}", 42u)); + EXPECT_EQ("0x42", format("{0:#x}", 0x42u)); + EXPECT_EQ("042", format("{0:#o}", 042u)); + + EXPECT_EQ("-42", format("{0:#}", -42l)); + EXPECT_EQ("0x42", format("{0:#x}", 0x42l)); + EXPECT_EQ("-0x42", format("{0:#x}", -0x42l)); + EXPECT_EQ("042", format("{0:#o}", 042l)); + EXPECT_EQ("-042", format("{0:#o}", -042l)); + EXPECT_EQ("42", format("{0:#}", 42ul)); + EXPECT_EQ("0x42", format("{0:#x}", 0x42ul)); + EXPECT_EQ("042", format("{0:#o}", 042ul)); + + EXPECT_EQ("-42", format("{0:#}", -42ll)); + EXPECT_EQ("0x42", format("{0:#x}", 0x42ll)); + EXPECT_EQ("-0x42", format("{0:#x}", -0x42ll)); + EXPECT_EQ("042", format("{0:#o}", 042ll)); + EXPECT_EQ("-042", format("{0:#o}", -042ll)); + EXPECT_EQ("42", format("{0:#}", 42ull)); + EXPECT_EQ("0x42", format("{0:#x}", 0x42ull)); + EXPECT_EQ("042", format("{0:#o}", 042ull)); + + EXPECT_EQ("-42.0", format("{0:#}", -42.0)); + EXPECT_EQ("-42.0", format("{0:#}", -42.0l)); + EXPECT_EQ("4.e+01", format("{:#.0e}", 42.0)); + EXPECT_EQ("0.", format("{:#.0f}", 0.01)); + auto s = format("{:#.0f}", 0.5); // MSVC's printf uses wrong rounding mode. + EXPECT_TRUE(s == "0." || s == "1."); + EXPECT_THROW_MSG(format("{0:#", 'c'), format_error, + "missing '}' in format string"); + EXPECT_THROW_MSG(format("{0:#}", 'c'), format_error, + "invalid format specifier for char"); + EXPECT_THROW_MSG(format("{0:#}", "abc"), format_error, + "format specifier requires numeric argument"); + EXPECT_THROW_MSG(format("{0:#}", reinterpret_cast<void*>(0x42)), format_error, + "format specifier requires numeric argument"); +} + +TEST(FormatterTest, ZeroFlag) { + EXPECT_EQ("42", format("{0:0}", 42)); + EXPECT_EQ("-0042", format("{0:05}", -42)); + EXPECT_EQ("00042", format("{0:05}", 42u)); + EXPECT_EQ("-0042", format("{0:05}", -42l)); + EXPECT_EQ("00042", format("{0:05}", 42ul)); + EXPECT_EQ("-0042", format("{0:05}", -42ll)); + EXPECT_EQ("00042", format("{0:05}", 42ull)); + EXPECT_EQ("-0042.0", format("{0:07}", -42.0)); + EXPECT_EQ("-0042.0", format("{0:07}", -42.0l)); + EXPECT_THROW_MSG(format("{0:0", 'c'), format_error, + "missing '}' in format string"); + EXPECT_THROW_MSG(format("{0:05}", 'c'), format_error, + "invalid format specifier for char"); + EXPECT_THROW_MSG(format("{0:05}", "abc"), format_error, + "format specifier requires numeric argument"); + EXPECT_THROW_MSG(format("{0:05}", reinterpret_cast<void*>(0x42)), + format_error, "format specifier requires numeric argument"); +} + +TEST(FormatterTest, Width) { + char format_str[BUFFER_SIZE]; + safe_sprintf(format_str, "{0:%u", UINT_MAX); + increment(format_str + 3); + EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big"); + size_t size = std::strlen(format_str); + format_str[size] = '}'; + format_str[size + 1] = 0; + EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big"); + + safe_sprintf(format_str, "{0:%u", INT_MAX + 1u); + EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big"); + safe_sprintf(format_str, "{0:%u}", INT_MAX + 1u); + EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big"); + EXPECT_EQ(" -42", format("{0:4}", -42)); + EXPECT_EQ(" 42", format("{0:5}", 42u)); + EXPECT_EQ(" -42", format("{0:6}", -42l)); + EXPECT_EQ(" 42", format("{0:7}", 42ul)); + EXPECT_EQ(" -42", format("{0:6}", -42ll)); + EXPECT_EQ(" 42", format("{0:7}", 42ull)); + EXPECT_EQ(" -1.23", format("{0:8}", -1.23)); + EXPECT_EQ(" -1.23", format("{0:9}", -1.23l)); + EXPECT_EQ(" 0xcafe", format("{0:10}", reinterpret_cast<void*>(0xcafe))); + EXPECT_EQ("x ", format("{0:11}", 'x')); + EXPECT_EQ("str ", format("{0:12}", "str")); + EXPECT_EQ(fmt::format("{:*^5}", "🤡"), "**🤡**"); +} + +template <typename T> inline T const_check(T value) { return value; } + +TEST(FormatterTest, RuntimeWidth) { + char format_str[BUFFER_SIZE]; + safe_sprintf(format_str, "{0:{%u", UINT_MAX); + increment(format_str + 4); + EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big"); + size_t size = std::strlen(format_str); + format_str[size] = '}'; + format_str[size + 1] = 0; + EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big"); + format_str[size + 1] = '}'; + format_str[size + 2] = 0; + EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big"); + + EXPECT_THROW_MSG(format("{0:{", 0), format_error, "invalid format string"); + EXPECT_THROW_MSG(format("{0:{}", 0), format_error, + "cannot switch from manual to automatic argument indexing"); + EXPECT_THROW_MSG(format("{0:{?}}", 0), format_error, "invalid format string"); + EXPECT_THROW_MSG(format("{0:{1}}", 0), format_error, "argument not found"); + + EXPECT_THROW_MSG(format("{0:{0:}}", 0), format_error, + "invalid format string"); + + EXPECT_THROW_MSG(format("{0:{1}}", 0, -1), format_error, "negative width"); + EXPECT_THROW_MSG(format("{0:{1}}", 0, (INT_MAX + 1u)), format_error, + "number is too big"); + EXPECT_THROW_MSG(format("{0:{1}}", 0, -1l), format_error, "negative width"); + if (const_check(sizeof(long) > sizeof(int))) { + long value = INT_MAX; + EXPECT_THROW_MSG(format("{0:{1}}", 0, (value + 1)), format_error, + "number is too big"); + } + EXPECT_THROW_MSG(format("{0:{1}}", 0, (INT_MAX + 1ul)), format_error, + "number is too big"); + + EXPECT_THROW_MSG(format("{0:{1}}", 0, '0'), format_error, + "width is not integer"); + EXPECT_THROW_MSG(format("{0:{1}}", 0, 0.0), format_error, + "width is not integer"); + + EXPECT_EQ(" -42", format("{0:{1}}", -42, 4)); + EXPECT_EQ(" 42", format("{0:{1}}", 42u, 5)); + EXPECT_EQ(" -42", format("{0:{1}}", -42l, 6)); + EXPECT_EQ(" 42", format("{0:{1}}", 42ul, 7)); + EXPECT_EQ(" -42", format("{0:{1}}", -42ll, 6)); + EXPECT_EQ(" 42", format("{0:{1}}", 42ull, 7)); + EXPECT_EQ(" -1.23", format("{0:{1}}", -1.23, 8)); + EXPECT_EQ(" -1.23", format("{0:{1}}", -1.23l, 9)); + EXPECT_EQ(" 0xcafe", + format("{0:{1}}", reinterpret_cast<void*>(0xcafe), 10)); + EXPECT_EQ("x ", format("{0:{1}}", 'x', 11)); + EXPECT_EQ("str ", format("{0:{1}}", "str", 12)); +} + +TEST(FormatterTest, Precision) { + char format_str[BUFFER_SIZE]; + safe_sprintf(format_str, "{0:.%u", UINT_MAX); + increment(format_str + 4); + EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big"); + size_t size = std::strlen(format_str); + format_str[size] = '}'; + format_str[size + 1] = 0; + EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big"); + + safe_sprintf(format_str, "{0:.%u", INT_MAX + 1u); + EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big"); + safe_sprintf(format_str, "{0:.%u}", INT_MAX + 1u); + EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big"); + + EXPECT_THROW_MSG(format("{0:.", 0), format_error, + "missing precision specifier"); + EXPECT_THROW_MSG(format("{0:.}", 0), format_error, + "missing precision specifier"); + + EXPECT_THROW_MSG(format("{0:.2", 0), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:.2}", 42), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:.2f}", 42), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:.2}", 42u), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:.2f}", 42u), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:.2}", 42l), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:.2f}", 42l), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:.2}", 42ul), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:.2f}", 42ul), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:.2}", 42ll), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:.2f}", 42ll), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:.2}", 42ull), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:.2f}", 42ull), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:3.0}", 'x'), format_error, + "precision not allowed for this argument type"); + EXPECT_EQ("1.2", format("{0:.2}", 1.2345)); + EXPECT_EQ("1.2", format("{0:.2}", 1.2345l)); + EXPECT_EQ("1.2e+56", format("{:.2}", 1.234e56)); + EXPECT_EQ("1e+00", format("{:.0e}", 1.0L)); + EXPECT_EQ(" 0.0e+00", format("{:9.1e}", 0.0)); + EXPECT_EQ( + "4.9406564584124654417656879286822137236505980261432476442558568250067550" + "727020875186529983636163599237979656469544571773092665671035593979639877" + "479601078187812630071319031140452784581716784898210368871863605699873072" + "305000638740915356498438731247339727316961514003171538539807412623856559" + "117102665855668676818703956031062493194527159149245532930545654440112748" + "012970999954193198940908041656332452475714786901472678015935523861155013" + "480352649347201937902681071074917033322268447533357208324319361e-324", + format("{:.494}", 4.9406564584124654E-324)); + EXPECT_EQ( + "-0X1.41FE3FFE71C9E000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000000000000000000000000" + "000000000000000000000000000000000000000000000000000P+127", + format("{:.838A}", -2.14001164E+38)); + EXPECT_EQ("123.", format("{:#.0f}", 123.0)); + EXPECT_EQ("1.23", format("{:.02f}", 1.234)); + EXPECT_EQ("0.001", format("{:.1g}", 0.001)); + + EXPECT_THROW_MSG(format("{0:.2}", reinterpret_cast<void*>(0xcafe)), + format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:.2f}", reinterpret_cast<void*>(0xcafe)), + format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{:.{}e}", 42.0, fmt::detail::max_value<int>()), + format_error, "number is too big"); + + EXPECT_EQ("st", format("{0:.2}", "str")); +} + +TEST(FormatterTest, RuntimePrecision) { + char format_str[BUFFER_SIZE]; + safe_sprintf(format_str, "{0:.{%u", UINT_MAX); + increment(format_str + 5); + EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big"); + size_t size = std::strlen(format_str); + format_str[size] = '}'; + format_str[size + 1] = 0; + EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big"); + format_str[size + 1] = '}'; + format_str[size + 2] = 0; + EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big"); + + EXPECT_THROW_MSG(format("{0:.{", 0), format_error, "invalid format string"); + EXPECT_THROW_MSG(format("{0:.{}", 0), format_error, + "cannot switch from manual to automatic argument indexing"); + EXPECT_THROW_MSG(format("{0:.{?}}", 0), format_error, + "invalid format string"); + EXPECT_THROW_MSG(format("{0:.{1}", 0, 0), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:.{1}}", 0), format_error, "argument not found"); + + EXPECT_THROW_MSG(format("{0:.{0:}}", 0), format_error, + "invalid format string"); + + EXPECT_THROW_MSG(format("{0:.{1}}", 0, -1), format_error, + "negative precision"); + EXPECT_THROW_MSG(format("{0:.{1}}", 0, (INT_MAX + 1u)), format_error, + "number is too big"); + EXPECT_THROW_MSG(format("{0:.{1}}", 0, -1l), format_error, + "negative precision"); + if (const_check(sizeof(long) > sizeof(int))) { + long value = INT_MAX; + EXPECT_THROW_MSG(format("{0:.{1}}", 0, (value + 1)), format_error, + "number is too big"); + } + EXPECT_THROW_MSG(format("{0:.{1}}", 0, (INT_MAX + 1ul)), format_error, + "number is too big"); + + EXPECT_THROW_MSG(format("{0:.{1}}", 0, '0'), format_error, + "precision is not integer"); + EXPECT_THROW_MSG(format("{0:.{1}}", 0, 0.0), format_error, + "precision is not integer"); + + EXPECT_THROW_MSG(format("{0:.{1}}", 42, 2), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:.{1}f}", 42, 2), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:.{1}}", 42u, 2), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:.{1}f}", 42u, 2), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:.{1}}", 42l, 2), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:.{1}f}", 42l, 2), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:.{1}}", 42ul, 2), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:.{1}f}", 42ul, 2), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:.{1}}", 42ll, 2), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:.{1}f}", 42ll, 2), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:.{1}}", 42ull, 2), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:.{1}f}", 42ull, 2), format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:3.{1}}", 'x', 0), format_error, + "precision not allowed for this argument type"); + EXPECT_EQ("1.2", format("{0:.{1}}", 1.2345, 2)); + EXPECT_EQ("1.2", format("{1:.{0}}", 2, 1.2345l)); + + EXPECT_THROW_MSG(format("{0:.{1}}", reinterpret_cast<void*>(0xcafe), 2), + format_error, + "precision not allowed for this argument type"); + EXPECT_THROW_MSG(format("{0:.{1}f}", reinterpret_cast<void*>(0xcafe), 2), + format_error, + "precision not allowed for this argument type"); + + EXPECT_EQ("st", format("{0:.{1}}", "str", 2)); +} + +template <typename T> +void check_unknown_types(const T& value, const char* types, const char*) { + char format_str[BUFFER_SIZE]; + const char* special = ".0123456789}"; + for (int i = CHAR_MIN; i <= CHAR_MAX; ++i) { + char c = static_cast<char>(i); + if (std::strchr(types, c) || std::strchr(special, c) || !c) continue; + safe_sprintf(format_str, "{0:10%c}", c); + const char* message = "invalid type specifier"; + EXPECT_THROW_MSG(format(format_str, value), format_error, message) + << format_str << " " << message; + } +} + +TEST(BoolTest, FormatBool) { + EXPECT_EQ("true", format("{}", true)); + EXPECT_EQ("false", format("{}", false)); + EXPECT_EQ("1", format("{:d}", true)); + EXPECT_EQ("true ", format("{:5}", true)); + EXPECT_EQ(L"true", format(L"{}", true)); +} + +TEST(FormatterTest, FormatShort) { + short s = 42; + EXPECT_EQ("42", format("{0:d}", s)); + unsigned short us = 42; + EXPECT_EQ("42", format("{0:d}", us)); +} + +TEST(FormatterTest, FormatInt) { + EXPECT_THROW_MSG(format("{0:v", 42), format_error, + "missing '}' in format string"); + check_unknown_types(42, "bBdoxXnLc", "integer"); + EXPECT_EQ("x", format("{:c}", static_cast<int>('x'))); +} + +TEST(FormatterTest, FormatBin) { + EXPECT_EQ("0", format("{0:b}", 0)); + EXPECT_EQ("101010", format("{0:b}", 42)); + EXPECT_EQ("101010", format("{0:b}", 42u)); + EXPECT_EQ("-101010", format("{0:b}", -42)); + EXPECT_EQ("11000000111001", format("{0:b}", 12345)); + EXPECT_EQ("10010001101000101011001111000", format("{0:b}", 0x12345678)); + EXPECT_EQ("10010000101010111100110111101111", format("{0:b}", 0x90ABCDEF)); + EXPECT_EQ("11111111111111111111111111111111", + 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(FormatterTest, FormatDec) { + EXPECT_EQ("0", format("{0}", 0)); + EXPECT_EQ("42", format("{0}", 42)); + EXPECT_EQ("42", format("{0:d}", 42)); + EXPECT_EQ("42", format("{0}", 42u)); + EXPECT_EQ("-42", format("{0}", -42)); + EXPECT_EQ("12345", format("{0}", 12345)); + EXPECT_EQ("67890", format("{0}", 67890)); +#if FMT_USE_INT128 + EXPECT_EQ("0", format("{0}", static_cast<__int128_t>(0))); + EXPECT_EQ("0", format("{0}", static_cast<__uint128_t>(0))); + EXPECT_EQ("9223372036854775808", + format("{0}", static_cast<__int128_t>(INT64_MAX) + 1)); + EXPECT_EQ("-9223372036854775809", + format("{0}", static_cast<__int128_t>(INT64_MIN) - 1)); + EXPECT_EQ("18446744073709551616", + format("{0}", static_cast<__int128_t>(UINT64_MAX) + 1)); + EXPECT_EQ("170141183460469231731687303715884105727", + format("{0}", int128_max)); + EXPECT_EQ("-170141183460469231731687303715884105728", + format("{0}", int128_min)); + EXPECT_EQ("340282366920938463463374607431768211455", + format("{0}", uint128_max)); +#endif + + char buffer[BUFFER_SIZE]; + safe_sprintf(buffer, "%d", INT_MIN); + EXPECT_EQ(buffer, format("{0}", INT_MIN)); + safe_sprintf(buffer, "%d", INT_MAX); + EXPECT_EQ(buffer, format("{0}", INT_MAX)); + safe_sprintf(buffer, "%u", UINT_MAX); + EXPECT_EQ(buffer, format("{0}", UINT_MAX)); + safe_sprintf(buffer, "%ld", 0 - static_cast<unsigned long>(LONG_MIN)); + EXPECT_EQ(buffer, format("{0}", LONG_MIN)); + safe_sprintf(buffer, "%ld", LONG_MAX); + EXPECT_EQ(buffer, format("{0}", LONG_MAX)); + safe_sprintf(buffer, "%lu", ULONG_MAX); + EXPECT_EQ(buffer, format("{0}", ULONG_MAX)); +} + +TEST(FormatterTest, FormatHex) { + EXPECT_EQ("0", format("{0:x}", 0)); + EXPECT_EQ("42", format("{0:x}", 0x42)); + EXPECT_EQ("42", format("{0:x}", 0x42u)); + EXPECT_EQ("-42", format("{0:x}", -0x42)); + EXPECT_EQ("12345678", format("{0:x}", 0x12345678)); + EXPECT_EQ("90abcdef", format("{0:x}", 0x90abcdef)); + EXPECT_EQ("12345678", format("{0:X}", 0x12345678)); + EXPECT_EQ("90ABCDEF", format("{0:X}", 0x90ABCDEF)); +#if FMT_USE_INT128 + EXPECT_EQ("0", format("{0:x}", static_cast<__int128_t>(0))); + EXPECT_EQ("0", format("{0:x}", static_cast<__uint128_t>(0))); + EXPECT_EQ("8000000000000000", + format("{0:x}", static_cast<__int128_t>(INT64_MAX) + 1)); + EXPECT_EQ("-8000000000000001", + format("{0:x}", static_cast<__int128_t>(INT64_MIN) - 1)); + EXPECT_EQ("10000000000000000", + format("{0:x}", static_cast<__int128_t>(UINT64_MAX) + 1)); + EXPECT_EQ("7fffffffffffffffffffffffffffffff", format("{0:x}", int128_max)); + EXPECT_EQ("-80000000000000000000000000000000", format("{0:x}", int128_min)); + EXPECT_EQ("ffffffffffffffffffffffffffffffff", format("{0:x}", uint128_max)); +#endif + + char buffer[BUFFER_SIZE]; + safe_sprintf(buffer, "-%x", 0 - static_cast<unsigned>(INT_MIN)); + EXPECT_EQ(buffer, format("{0:x}", INT_MIN)); + safe_sprintf(buffer, "%x", INT_MAX); + EXPECT_EQ(buffer, format("{0:x}", INT_MAX)); + safe_sprintf(buffer, "%x", UINT_MAX); + EXPECT_EQ(buffer, format("{0:x}", UINT_MAX)); + safe_sprintf(buffer, "-%lx", 0 - static_cast<unsigned long>(LONG_MIN)); + EXPECT_EQ(buffer, format("{0:x}", LONG_MIN)); + safe_sprintf(buffer, "%lx", LONG_MAX); + EXPECT_EQ(buffer, format("{0:x}", LONG_MAX)); + safe_sprintf(buffer, "%lx", ULONG_MAX); + EXPECT_EQ(buffer, format("{0:x}", ULONG_MAX)); +} + +TEST(FormatterTest, FormatOct) { + EXPECT_EQ("0", format("{0:o}", 0)); + EXPECT_EQ("42", format("{0:o}", 042)); + EXPECT_EQ("42", format("{0:o}", 042u)); + EXPECT_EQ("-42", format("{0:o}", -042)); + EXPECT_EQ("12345670", format("{0:o}", 012345670)); +#if FMT_USE_INT128 + EXPECT_EQ("0", format("{0:o}", static_cast<__int128_t>(0))); + EXPECT_EQ("0", format("{0:o}", static_cast<__uint128_t>(0))); + EXPECT_EQ("1000000000000000000000", + format("{0:o}", static_cast<__int128_t>(INT64_MAX) + 1)); + EXPECT_EQ("-1000000000000000000001", + format("{0:o}", static_cast<__int128_t>(INT64_MIN) - 1)); + EXPECT_EQ("2000000000000000000000", + format("{0:o}", static_cast<__int128_t>(UINT64_MAX) + 1)); + EXPECT_EQ("1777777777777777777777777777777777777777777", + format("{0:o}", int128_max)); + EXPECT_EQ("-2000000000000000000000000000000000000000000", + format("{0:o}", int128_min)); + EXPECT_EQ("3777777777777777777777777777777777777777777", + format("{0:o}", uint128_max)); +#endif + + char buffer[BUFFER_SIZE]; + safe_sprintf(buffer, "-%o", 0 - static_cast<unsigned>(INT_MIN)); + EXPECT_EQ(buffer, format("{0:o}", INT_MIN)); + safe_sprintf(buffer, "%o", INT_MAX); + EXPECT_EQ(buffer, format("{0:o}", INT_MAX)); + safe_sprintf(buffer, "%o", UINT_MAX); + EXPECT_EQ(buffer, format("{0:o}", UINT_MAX)); + safe_sprintf(buffer, "-%lo", 0 - static_cast<unsigned long>(LONG_MIN)); + EXPECT_EQ(buffer, format("{0:o}", LONG_MIN)); + safe_sprintf(buffer, "%lo", LONG_MAX); + EXPECT_EQ(buffer, format("{0:o}", LONG_MAX)); + safe_sprintf(buffer, "%lo", ULONG_MAX); + EXPECT_EQ(buffer, format("{0:o}", ULONG_MAX)); +} + +TEST(FormatterTest, FormatIntLocale) { + EXPECT_EQ("1234", format("{:n}", 1234)); + EXPECT_EQ("1234", format("{:L}", 1234)); +} + +struct ConvertibleToLongLong { + operator long long() const { return 1LL << 32; } +}; + +TEST(FormatterTest, FormatConvertibleToLongLong) { + EXPECT_EQ("100000000", format("{:x}", ConvertibleToLongLong())); +} + +TEST(FormatterTest, FormatFloat) { + EXPECT_EQ("392.500000", format("{0:f}", 392.5f)); +} + +TEST(FormatterTest, FormatDouble) { + check_unknown_types(1.2, "eEfFgGaAnL%", "double"); + EXPECT_EQ("0.0", format("{:}", 0.0)); + EXPECT_EQ("0.000000", format("{:f}", 0.0)); + EXPECT_EQ("0", format("{:g}", 0.0)); + EXPECT_EQ("392.65", format("{:}", 392.65)); + EXPECT_EQ("392.65", format("{:g}", 392.65)); + EXPECT_EQ("392.65", format("{:G}", 392.65)); + EXPECT_EQ("392.650000", format("{:f}", 392.65)); + EXPECT_EQ("392.650000", format("{:F}", 392.65)); + EXPECT_EQ("42", format("{:L}", 42.0)); + char buffer[BUFFER_SIZE]; + safe_sprintf(buffer, "%e", 392.65); + EXPECT_EQ(buffer, format("{0:e}", 392.65)); + safe_sprintf(buffer, "%E", 392.65); + EXPECT_EQ(buffer, format("{0:E}", 392.65)); + EXPECT_EQ("+0000392.6", format("{0:+010.4g}", 392.65)); + safe_sprintf(buffer, "%a", -42.0); + EXPECT_EQ(buffer, format("{:a}", -42.0)); + safe_sprintf(buffer, "%A", -42.0); + EXPECT_EQ(buffer, format("{:A}", -42.0)); +} + +TEST(FormatterTest, PrecisionRounding) { + EXPECT_EQ("0", format("{:.0f}", 0.0)); + EXPECT_EQ("0", format("{:.0f}", 0.01)); + EXPECT_EQ("0", format("{:.0f}", 0.1)); + EXPECT_EQ("0.000", format("{:.3f}", 0.00049)); + EXPECT_EQ("0.001", format("{:.3f}", 0.0005)); + EXPECT_EQ("0.001", format("{:.3f}", 0.00149)); + EXPECT_EQ("0.002", format("{:.3f}", 0.0015)); + EXPECT_EQ("1.000", format("{:.3f}", 0.9999)); + EXPECT_EQ("0.00123", format("{:.3}", 0.00123)); + EXPECT_EQ("0.1", format("{:.16g}", 0.1)); + // Trigger rounding error in Grisu by a carefully chosen number. + auto n = 3788512123356.985352; + char buffer[64]; + safe_sprintf(buffer, "%f", n); + EXPECT_EQ(buffer, format("{:f}", n)); +} + +TEST(FormatterTest, FormatNaN) { + double nan = std::numeric_limits<double>::quiet_NaN(); + EXPECT_EQ("nan", format("{}", nan)); + EXPECT_EQ("+nan", format("{:+}", nan)); + EXPECT_EQ(" nan", format("{: }", nan)); + EXPECT_EQ("NAN", format("{:F}", nan)); + EXPECT_EQ("nan ", format("{:<7}", nan)); + EXPECT_EQ(" nan ", format("{:^7}", nan)); + EXPECT_EQ(" nan", format("{:>7}", nan)); +} + +TEST(FormatterTest, FormatInfinity) { + double inf = std::numeric_limits<double>::infinity(); + EXPECT_EQ("inf", format("{}", inf)); + EXPECT_EQ("+inf", format("{:+}", inf)); + EXPECT_EQ("-inf", format("{}", -inf)); + EXPECT_EQ(" inf", format("{: }", inf)); + EXPECT_EQ("INF", format("{:F}", inf)); + EXPECT_EQ("inf ", format("{:<7}", inf)); + EXPECT_EQ(" inf ", format("{:^7}", inf)); + EXPECT_EQ(" inf", format("{:>7}", inf)); +} + +TEST(FormatterTest, FormatLongDouble) { + EXPECT_EQ("0.0", format("{0:}", 0.0l)); + EXPECT_EQ("0.000000", format("{0:f}", 0.0l)); + EXPECT_EQ("392.65", format("{0:}", 392.65l)); + EXPECT_EQ("392.65", format("{0:g}", 392.65l)); + EXPECT_EQ("392.65", format("{0:G}", 392.65l)); + EXPECT_EQ("392.650000", format("{0:f}", 392.65l)); + EXPECT_EQ("392.650000", format("{0:F}", 392.65l)); + char buffer[BUFFER_SIZE]; + safe_sprintf(buffer, "%Le", 392.65l); + EXPECT_EQ(buffer, format("{0:e}", 392.65l)); + EXPECT_EQ("+0000392.6", format("{0:+010.4g}", 392.64l)); + safe_sprintf(buffer, "%La", 3.31l); + EXPECT_EQ(buffer, format("{:a}", 3.31l)); +} + +TEST(FormatterTest, FormatChar) { + const char types[] = "cbBdoxXnL"; + check_unknown_types('a', types, "char"); + EXPECT_EQ("a", format("{0}", 'a')); + EXPECT_EQ("z", format("{0:c}", 'z')); + EXPECT_EQ(L"a", format(L"{0}", 'a')); + int n = 'x'; + for (const char* type = types + 1; *type; ++type) { + std::string format_str = fmt::format("{{:{}}}", *type); + EXPECT_EQ(fmt::format(format_str, n), fmt::format(format_str, 'x')); + } + EXPECT_EQ(fmt::format("{:02X}", n), fmt::format("{:02X}", 'x')); +} + +TEST(FormatterTest, FormatVolatileChar) { + volatile char c = 'x'; + EXPECT_EQ("x", format("{}", c)); +} + +TEST(FormatterTest, FormatUnsignedChar) { + EXPECT_EQ("42", format("{}", static_cast<unsigned char>(42))); + EXPECT_EQ("42", format("{}", static_cast<uint8_t>(42))); +} + +TEST(FormatterTest, FormatWChar) { + EXPECT_EQ(L"a", format(L"{0}", L'a')); + // This shouldn't compile: + // format("{}", L'a'); +} + +TEST(FormatterTest, FormatCString) { + check_unknown_types("test", "sp", "string"); + EXPECT_EQ("test", format("{0}", "test")); + EXPECT_EQ("test", format("{0:s}", "test")); + char nonconst[] = "nonconst"; + EXPECT_EQ("nonconst", format("{0}", nonconst)); + EXPECT_THROW_MSG(format("{0}", static_cast<const char*>(nullptr)), + format_error, "string pointer is null"); +} + +TEST(FormatterTest, FormatSCharString) { + signed char str[] = "test"; + EXPECT_EQ("test", format("{0:s}", str)); + const signed char* const_str = str; + EXPECT_EQ("test", format("{0:s}", const_str)); +} + +TEST(FormatterTest, FormatUCharString) { + unsigned char str[] = "test"; + EXPECT_EQ("test", format("{0:s}", str)); + const unsigned char* const_str = str; + EXPECT_EQ("test", format("{0:s}", const_str)); + unsigned char* ptr = str; + EXPECT_EQ("test", format("{0:s}", ptr)); +} + +TEST(FormatterTest, FormatPointer) { + check_unknown_types(reinterpret_cast<void*>(0x1234), "p", "pointer"); + EXPECT_EQ("0x0", format("{0}", static_cast<void*>(nullptr))); + EXPECT_EQ("0x1234", format("{0}", reinterpret_cast<void*>(0x1234))); + EXPECT_EQ("0x1234", format("{0:p}", reinterpret_cast<void*>(0x1234))); + EXPECT_EQ("0x" + std::string(sizeof(void*) * CHAR_BIT / 4, 'f'), + format("{0}", reinterpret_cast<void*>(~uintptr_t()))); + EXPECT_EQ("0x1234", format("{}", fmt::ptr(reinterpret_cast<int*>(0x1234)))); + std::unique_ptr<int> up(new int(1)); + EXPECT_EQ(format("{}", fmt::ptr(up.get())), format("{}", fmt::ptr(up))); + std::shared_ptr<int> sp(new int(1)); + EXPECT_EQ(format("{}", fmt::ptr(sp.get())), format("{}", fmt::ptr(sp))); + EXPECT_EQ("0x0", format("{}", nullptr)); +} + +TEST(FormatterTest, FormatString) { + EXPECT_EQ("test", format("{0}", std::string("test"))); +} + +TEST(FormatterTest, FormatStringView) { + EXPECT_EQ("test", format("{}", string_view("test"))); + EXPECT_EQ("", 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(FormatterTest, FormatStdStringView) { + EXPECT_EQ("test", format("{}", std::string_view("test"))); + EXPECT_EQ("foo", format("{}", string_viewable())); +} + +struct explicitly_convertible_to_std_string_view { + explicit operator std::string_view() const { return "foo"; } +}; + +namespace fmt { +template <> +struct formatter<explicitly_convertible_to_std_string_view> + : formatter<std::string_view> { + auto format(const explicitly_convertible_to_std_string_view& v, + format_context& ctx) -> decltype(ctx.out()) { + return format_to(ctx.out(), "'{}'", std::string_view(v)); + } +}; +} // namespace fmt + +TEST(FormatterTest, FormatExplicitlyConvertibleToStdStringView) { + EXPECT_EQ("'foo'", + fmt::format("{}", explicitly_convertible_to_std_string_view())); +} +#endif + +// std::is_constructible is broken in MSVC until version 2015. +#if !FMT_MSC_VER || FMT_MSC_VER >= 1900 +struct explicitly_convertible_to_wstring_view { + explicit operator fmt::wstring_view() const { return L"foo"; } +}; + +TEST(FormatTest, FormatExplicitlyConvertibleToWStringView) { + EXPECT_EQ(L"foo", + fmt::format(L"{}", explicitly_convertible_to_wstring_view())); +} +#endif + +namespace fake_qt { +class QString { + public: + QString(const wchar_t* s) : s_(std::make_shared<std::wstring>(s)) {} + const wchar_t* utf16() const FMT_NOEXCEPT { return s_->data(); } + int size() const FMT_NOEXCEPT { return static_cast<int>(s_->size()); } + + private: + std::shared_ptr<std::wstring> s_; +}; + +fmt::basic_string_view<wchar_t> to_string_view(const QString& s) FMT_NOEXCEPT { + return {s.utf16(), static_cast<size_t>(s.size())}; +} +} // namespace fake_qt + +TEST(FormatTest, FormatForeignStrings) { + using fake_qt::QString; + EXPECT_EQ(fmt::format(QString(L"{}"), 42), L"42"); + EXPECT_EQ(fmt::format(QString(L"{}"), QString(L"42")), L"42"); +} + +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 == 'd') ++it; + return it; + } + + auto format(const Date& d, format_context& ctx) -> decltype(ctx.out()) { + format_to(ctx.out(), "{}-{}-{}", d.year(), d.month(), d.day()); + return ctx.out(); + } +}; +FMT_END_NAMESPACE + +TEST(FormatterTest, FormatCustom) { + Date date(2012, 12, 9); + EXPECT_THROW_MSG(fmt::format("{:s}", date), format_error, + "unknown format specifier"); +} + +class Answer {}; + +FMT_BEGIN_NAMESPACE +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(FormatterTest, CustomFormat) { + EXPECT_EQ("42", format("{0}", Answer())); + EXPECT_EQ("0042", format("{:04}", Answer())); +} + +TEST(FormatterTest, CustomFormatTo) { + char buf[10] = {}; + auto end = + &*fmt::format_to(fmt::detail::make_checked(buf, 10), "{}", Answer()); + EXPECT_EQ(end, buf + 2); + EXPECT_STREQ(buf, "42"); +} + +TEST(FormatterTest, WideFormatString) { + EXPECT_EQ(L"42", format(L"{}", 42)); + EXPECT_EQ(L"4.2", format(L"{}", 4.2)); + EXPECT_EQ(L"abc", format(L"{}", L"abc")); + EXPECT_EQ(L"z", format(L"{}", L'z')); +} + +TEST(FormatterTest, FormatStringFromSpeedTest) { + EXPECT_EQ("1.2340000000:0042:+3.13:str:0x3e8:X:%", + format("{0:0.10f}:{1:04}:{2:+g}:{3}:{4}:{5}:%", 1.234, 42, 3.13, + "str", reinterpret_cast<void*>(1000), 'X')); +} + +TEST(FormatterTest, FormatExamples) { + std::string message = format("The answer is {}", 42); + EXPECT_EQ("The answer is 42", message); + + EXPECT_EQ("42", format("{}", 42)); + EXPECT_EQ("42", format(std::string("{}"), 42)); + + memory_buffer out; + format_to(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'"); +} + +TEST(FormatterTest, Examples) { + EXPECT_EQ("First, thou shalt count to three", + format("First, thou shalt count to {0}", "three")); + EXPECT_EQ("Bring me a shrubbery", format("Bring me a {}", "shrubbery")); + EXPECT_EQ("From 1 to 3", format("From {} to {}", 1, 3)); + + char buffer[BUFFER_SIZE]; + safe_sprintf(buffer, "%03.2f", -1.2); + EXPECT_EQ(buffer, format("{:03.2f}", -1.2)); + + EXPECT_EQ("a, b, c", format("{0}, {1}, {2}", 'a', 'b', 'c')); + EXPECT_EQ("a, b, c", format("{}, {}, {}", 'a', 'b', 'c')); + EXPECT_EQ("c, b, a", format("{2}, {1}, {0}", 'a', 'b', 'c')); + EXPECT_EQ("abracadabra", format("{0}{1}{0}", "abra", "cad")); + + EXPECT_EQ("left aligned ", format("{:<30}", "left aligned")); + EXPECT_EQ(" right aligned", + format("{:>30}", "right aligned")); + EXPECT_EQ(" centered ", format("{:^30}", "centered")); + EXPECT_EQ("***********centered***********", format("{:*^30}", "centered")); + + EXPECT_EQ("+3.140000; -3.140000", format("{:+f}; {:+f}", 3.14, -3.14)); + EXPECT_EQ(" 3.140000; -3.140000", format("{: f}; {: f}", 3.14, -3.14)); + EXPECT_EQ("3.140000; -3.140000", format("{:-f}; {:-f}", 3.14, -3.14)); + + EXPECT_EQ("int: 42; hex: 2a; oct: 52", + format("int: {0:d}; hex: {0:x}; oct: {0:o}", 42)); + EXPECT_EQ("int: 42; hex: 0x2a; oct: 052", + format("int: {0:d}; hex: {0:#x}; oct: {0:#o}", 42)); + + EXPECT_EQ("The answer is 42", format("The answer is {}", 42)); + EXPECT_THROW_MSG(format("The answer is {:d}", "forty-two"), format_error, + "invalid type specifier"); + + EXPECT_EQ(L"Cyrillic letter \x42e", format(L"Cyrillic letter {}", L'\x42e')); + + EXPECT_WRITE( + stdout, fmt::print("{}", std::numeric_limits<double>::infinity()), "inf"); +} + +TEST(FormatIntTest, Data) { + fmt::format_int format_int(42); + EXPECT_EQ("42", std::string(format_int.data(), format_int.size())); +} + +TEST(FormatIntTest, FormatInt) { + EXPECT_EQ("42", fmt::format_int(42).str()); + EXPECT_EQ(2u, fmt::format_int(42).size()); + EXPECT_EQ("-42", fmt::format_int(-42).str()); + EXPECT_EQ(3u, fmt::format_int(-42).size()); + EXPECT_EQ("42", fmt::format_int(42ul).str()); + EXPECT_EQ("-42", fmt::format_int(-42l).str()); + EXPECT_EQ("42", fmt::format_int(42ull).str()); + EXPECT_EQ("-42", fmt::format_int(-42ll).str()); + std::ostringstream os; + os << max_value<int64_t>(); + EXPECT_EQ(os.str(), fmt::format_int(max_value<int64_t>()).str()); +} + +TEST(FormatTest, Print) { +#if FMT_USE_FCNTL + EXPECT_WRITE(stdout, fmt::print("Don't {}!", "panic"), "Don't panic!"); + EXPECT_WRITE(stderr, fmt::print(stderr, "Don't {}!", "panic"), + "Don't panic!"); +#endif + // Check that the wide print overload compiles. + if (fmt::detail::const_check(false)) fmt::print(L"test"); +} + +TEST(FormatTest, Variadic) { + EXPECT_EQ("abc1", format("{}c{}", "ab", 1)); + EXPECT_EQ(L"abc1", format(L"{}c{}", L"ab", 1)); +} + +TEST(FormatTest, Dynamic) { + typedef fmt::format_context ctx; + std::vector<fmt::basic_format_arg<ctx>> args; + args.emplace_back(fmt::detail::make_arg<ctx>(42)); + args.emplace_back(fmt::detail::make_arg<ctx>("abc1")); + args.emplace_back(fmt::detail::make_arg<ctx>(1.5f)); + + std::string result = fmt::vformat( + "{} and {} and {}", + fmt::basic_format_args<ctx>(args.data(), static_cast<int>(args.size()))); + + EXPECT_EQ("42 and abc1 and 1.5", result); +} + +TEST(FormatTest, Bytes) { + auto s = fmt::format("{:10}", fmt::bytes("ёжик")); + EXPECT_EQ("ёжик ", s); + EXPECT_EQ(10, s.size()); +} + +TEST(FormatTest, JoinArg) { + using fmt::join; + int v1[3] = {1, 2, 3}; + std::vector<float> v2; + v2.push_back(1.2f); + v2.push_back(3.4f); + void* v3[2] = {&v1[0], &v1[1]}; + + EXPECT_EQ("(1, 2, 3)", format("({})", join(v1, v1 + 3, ", "))); + EXPECT_EQ("(1)", format("({})", join(v1, v1 + 1, ", "))); + EXPECT_EQ("()", format("({})", join(v1, v1, ", "))); + EXPECT_EQ("(001, 002, 003)", format("({:03})", join(v1, v1 + 3, ", "))); + EXPECT_EQ("(+01.20, +03.40)", + format("({:+06.2f})", join(v2.begin(), v2.end(), ", "))); + + EXPECT_EQ(L"(1, 2, 3)", format(L"({})", join(v1, v1 + 3, L", "))); + EXPECT_EQ("1, 2, 3", format("{0:{1}}", join(v1, v1 + 3, ", "), 1)); + + EXPECT_EQ(format("{}, {}", v3[0], v3[1]), + format("{}", join(v3, v3 + 2, ", "))); + +#if !FMT_GCC_VERSION || FMT_GCC_VERSION >= 405 + EXPECT_EQ("(1, 2, 3)", format("({})", join(v1, ", "))); + EXPECT_EQ("(+01.20, +03.40)", format("({:+06.2f})", join(v2, ", "))); +#endif +} + +template <typename T> std::string str(const T& value) { + return fmt::format("{}", value); +} + +TEST(StrTest, Convert) { + EXPECT_EQ("42", str(42)); + std::string s = str(Date(2012, 12, 9)); + EXPECT_EQ("2012-12-9", s); +} + +std::string vformat_message(int id, const char* format, fmt::format_args args) { + fmt::memory_buffer buffer; + format_to(buffer, "[{}] ", id); + vformat_to(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(FormatTest, FormatMessageExample) { + 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(FormatTest, UnpackedArgs) { + EXPECT_EQ("0123456789abcdefg", + fmt::format("{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}", 0, 1, 2, 3, 4, 5, + 6, 7, 8, 9, 'a', 'b', 'c', 'd', 'e', 'f', 'g')); +} + +struct string_like {}; +fmt::string_view to_string_view(string_like) { return "foo"; } + +constexpr char with_null[3] = {'{', '}', '\0'}; +constexpr char no_null[2] = {'{', '}'}; + +TEST(FormatTest, CompileTimeString) { + EXPECT_EQ("42", fmt::format(FMT_STRING("{}"), 42)); + EXPECT_EQ(L"42", fmt::format(FMT_STRING(L"{}"), 42)); + EXPECT_EQ("foo", fmt::format(FMT_STRING("{}"), string_like())); + (void)with_null; + (void)no_null; +#if __cplusplus >= 201703L + EXPECT_EQ("42", fmt::format(FMT_STRING(with_null), 42)); + EXPECT_EQ("42", fmt::format(FMT_STRING(no_null), 42)); +#endif +#if defined(FMT_USE_STRING_VIEW) && __cplusplus >= 201703L + EXPECT_EQ("42", fmt::format(FMT_STRING(std::string_view("{}")), 42)); + EXPECT_EQ(L"42", fmt::format(FMT_STRING(std::wstring_view(L"{}")), 42)); +#endif +} + +TEST(FormatTest, CustomFormatCompileTimeString) { + EXPECT_EQ("42", fmt::format(FMT_STRING("{}"), Answer())); + Answer answer; + EXPECT_EQ("42", fmt::format(FMT_STRING("{}"), answer)); + char buf[10] = {}; + fmt::format_to(buf, FMT_STRING("{}"), answer); + const Answer const_answer = Answer(); + EXPECT_EQ("42", fmt::format(FMT_STRING("{}"), const_answer)); +} + +#if FMT_USE_USER_DEFINED_LITERALS +// Passing user-defined literals directly to EXPECT_EQ causes problems +// with macro argument stringification (#) on some versions of GCC. +// Workaround: Assing the UDL result to a variable before the macro. + +using namespace fmt::literals; + +TEST(LiteralsTest, Format) { + auto udl_format = "{}c{}"_format("ab", 1); + EXPECT_EQ(format("{}c{}", "ab", 1), udl_format); + auto udl_format_w = L"{}c{}"_format(L"ab", 1); + EXPECT_EQ(format(L"{}c{}", L"ab", 1), udl_format_w); +} + +TEST(LiteralsTest, NamedArg) { + auto udl_a = format("{first}{second}{first}{third}", "first"_a = "abra", + "second"_a = "cad", "third"_a = 99); + EXPECT_EQ(format("{first}{second}{first}{third}", fmt::arg("first", "abra"), + fmt::arg("second", "cad"), fmt::arg("third", 99)), + udl_a); + auto udl_a_w = format(L"{first}{second}{first}{third}", L"first"_a = L"abra", + L"second"_a = L"cad", L"third"_a = 99); + EXPECT_EQ( + format(L"{first}{second}{first}{third}", fmt::arg(L"first", L"abra"), + fmt::arg(L"second", L"cad"), fmt::arg(L"third", 99)), + udl_a_w); +} + +TEST(FormatTest, UdlTemplate) { + EXPECT_EQ("foo", "foo"_format()); + EXPECT_EQ(" 42", "{0:10}"_format(42)); +} + +TEST(FormatTest, UdlPassUserDefinedObjectAsLvalue) { + Date date(2015, 10, 21); + EXPECT_EQ("2015-10-21", "{}"_format(date)); +} +#endif // FMT_USE_USER_DEFINED_LITERALS + +enum TestEnum { A }; + +TEST(FormatTest, Enum) { EXPECT_EQ("0", fmt::format("{}", A)); } + +TEST(FormatTest, FormatterNotSpecialized) { + static_assert( + !fmt::has_formatter<fmt::formatter<TestEnum>, fmt::format_context>::value, + ""); +} + +#if FMT_HAS_FEATURE(cxx_strong_enums) +enum big_enum : unsigned long long { big_enum_value = 5000000000ULL }; + +TEST(FormatTest, StrongEnum) { + EXPECT_EQ("5000000000", fmt::format("{}", big_enum_value)); +} +#endif + +using buffer_range = fmt::buffer_range<char>; + +class mock_arg_formatter + : public fmt::detail::arg_formatter_base<buffer_range> { + private: +#if FMT_USE_INT128 + MOCK_METHOD1(call, void(__int128_t value)); +#else + MOCK_METHOD1(call, void(long long value)); +#endif + + public: + typedef fmt::detail::arg_formatter_base<buffer_range> base; + typedef buffer_range range; + + mock_arg_formatter(fmt::format_context& ctx, fmt::format_parse_context*, + fmt::format_specs* s = nullptr) + : base(fmt::detail::get_container(ctx.out()), s, ctx.locale()) { + EXPECT_CALL(*this, call(42)); + } + + template <typename T> + typename std::enable_if<fmt::detail::is_integral<T>::value, iterator>::type + operator()(T value) { + call(value); + return base::operator()(value); + } + + template <typename T> + typename std::enable_if<!fmt::detail::is_integral<T>::value, iterator>::type + operator()(T value) { + return base::operator()(value); + } + + iterator operator()(fmt::basic_format_arg<fmt::format_context>::handle) { + return base::operator()(fmt::monostate()); + } +}; + +static void custom_vformat(fmt::string_view format_str, fmt::format_args args) { + fmt::memory_buffer buffer; + fmt::vformat_to<mock_arg_formatter>(buffer, format_str, args); +} + +template <typename... Args> +void custom_format(const char* format_str, const Args&... args) { + auto va = fmt::make_format_args(args...); + return custom_vformat(format_str, va); +} + +TEST(FormatTest, CustomArgFormatter) { custom_format("{}", 42); } + +TEST(FormatTest, NonNullTerminatedFormatString) { + EXPECT_EQ("42", format(string_view("{}foo", 2), 42)); +} + +struct variant { + enum { INT, STRING } type; + explicit variant(int) : type(INT) {} + explicit variant(const char*) : type(STRING) {} +}; + +FMT_BEGIN_NAMESPACE +template <> struct formatter<variant> : dynamic_formatter<> { + auto format(variant value, format_context& ctx) -> decltype(ctx.out()) { + if (value.type == variant::INT) return dynamic_formatter<>::format(42, ctx); + return dynamic_formatter<>::format("foo", ctx); + } +}; +FMT_END_NAMESPACE + +TEST(FormatTest, DynamicFormatter) { + auto num = variant(42); + auto str = variant("foo"); + EXPECT_EQ("42", format("{:d}", num)); + EXPECT_EQ("foo", format("{:s}", str)); + EXPECT_EQ(" 42 foo ", format("{:{}} {:{}}", num, 3, str, 4)); + EXPECT_THROW_MSG(format("{0:{}}", num), format_error, + "cannot switch from manual to automatic argument indexing"); + EXPECT_THROW_MSG(format("{:{0}}", num), format_error, + "cannot switch from automatic to manual argument indexing"); +#if FMT_NUMERIC_ALIGN + EXPECT_THROW_MSG(format("{:=}", str), format_error, + "format specifier requires numeric argument"); +#endif + EXPECT_THROW_MSG(format("{:+}", str), format_error, + "format specifier requires numeric argument"); + EXPECT_THROW_MSG(format("{:-}", str), format_error, + "format specifier requires numeric argument"); + EXPECT_THROW_MSG(format("{: }", str), format_error, + "format specifier requires numeric argument"); + EXPECT_THROW_MSG(format("{:#}", str), format_error, + "format specifier requires numeric argument"); + EXPECT_THROW_MSG(format("{:0}", str), format_error, + "format specifier requires numeric argument"); + EXPECT_THROW_MSG(format("{:.2}", num), format_error, + "precision not allowed for this argument type"); +} + +TEST(FormatTest, ToString) { + EXPECT_EQ("42", fmt::to_string(42)); + EXPECT_EQ("0x1234", fmt::to_string(reinterpret_cast<void*>(0x1234))); +} + +TEST(FormatTest, ToWString) { EXPECT_EQ(L"42", fmt::to_wstring(42)); } + +TEST(FormatTest, OutputIterators) { + 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(FormatTest, FormattedSize) { + EXPECT_EQ(2u, fmt::formatted_size("{}", 42)); +} + +TEST(FormatTest, FormatToN) { + 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)); +} + +TEST(FormatTest, WideFormatToN) { + wchar_t buffer[4]; + buffer[3] = L'x'; + auto result = fmt::format_to_n(buffer, 3, L"{}", 12345); + EXPECT_EQ(5u, result.size); + EXPECT_EQ(buffer + 3, result.out); + EXPECT_EQ(L"123x", fmt::wstring_view(buffer, 4)); + buffer[0] = L'x'; + buffer[1] = L'x'; + buffer[2] = L'x'; + result = fmt::format_to_n(buffer, 3, L"{}", L'A'); + EXPECT_EQ(1u, result.size); + EXPECT_EQ(buffer + 1, result.out); + EXPECT_EQ(L"Axxx", fmt::wstring_view(buffer, 4)); + result = fmt::format_to_n(buffer, 3, L"{}{} ", L'B', L'C'); + EXPECT_EQ(3u, result.size); + EXPECT_EQ(buffer + 3, result.out); + EXPECT_EQ(L"BC x", fmt::wstring_view(buffer, 4)); +} + +struct test_output_iterator { + char* data; + + using iterator_category = std::output_iterator_tag; + using value_type = void; + using difference_type = void; + using pointer = void; + using reference = void; + + test_output_iterator& operator++() { + ++data; + return *this; + } + test_output_iterator operator++(int) { + auto tmp = *this; + ++data; + return tmp; + } + char& operator*() { return *data; } +}; + +TEST(FormatTest, FormatToNOutputIterator) { + char buf[10] = {}; + fmt::format_to_n(test_output_iterator{buf}, 10, "{}", 42); + EXPECT_STREQ(buf, "42"); +} + +#if FMT_USE_CONSTEXPR +struct test_arg_id_handler { + enum result { NONE, EMPTY, INDEX, NAME, ERROR }; + result res = NONE; + int index = 0; + string_view name; + + FMT_CONSTEXPR void operator()() { res = EMPTY; } + + FMT_CONSTEXPR void operator()(int i) { + res = INDEX; + index = i; + } + + FMT_CONSTEXPR void operator()(string_view n) { + res = NAME; + name = n; + } + + FMT_CONSTEXPR void on_error(const char*) { res = ERROR; } +}; + +template <size_t N> +FMT_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(FormatTest, ConstexprParseArgID) { + static_assert(parse_arg_id(":").res == test_arg_id_handler::EMPTY, ""); + static_assert(parse_arg_id("}").res == test_arg_id_handler::EMPTY, ""); + static_assert(parse_arg_id("42:").res == test_arg_id_handler::INDEX, ""); + static_assert(parse_arg_id("42:").index == 42, ""); + static_assert(parse_arg_id("foo:").res == test_arg_id_handler::NAME, ""); + static_assert(parse_arg_id("foo:").name.size() == 3, ""); + static_assert(parse_arg_id("!").res == test_arg_id_handler::ERROR, ""); +} + +struct test_format_specs_handler { + enum Result { NONE, PLUS, MINUS, SPACE, HASH, ZERO, ERROR }; + Result res = NONE; + + fmt::align_t align = fmt::align::none; + char fill = 0; + int width = 0; + fmt::detail::arg_ref<char> width_ref; + int precision = 0; + fmt::detail::arg_ref<char> precision_ref; + char type = 0; + + // Workaround for MSVC2017 bug that results in "expression did not evaluate + // to a constant" with compiler-generated copy ctor. + FMT_CONSTEXPR test_format_specs_handler() {} + FMT_CONSTEXPR test_format_specs_handler( + const test_format_specs_handler& other) + : res(other.res), + align(other.align), + fill(other.fill), + width(other.width), + width_ref(other.width_ref), + precision(other.precision), + precision_ref(other.precision_ref), + type(other.type) {} + + FMT_CONSTEXPR void on_align(fmt::align_t a) { align = a; } + FMT_CONSTEXPR void on_fill(fmt::string_view f) { fill = f[0]; } + FMT_CONSTEXPR void on_plus() { res = PLUS; } + FMT_CONSTEXPR void on_minus() { res = MINUS; } + FMT_CONSTEXPR void on_space() { res = SPACE; } + FMT_CONSTEXPR void on_hash() { res = HASH; } + FMT_CONSTEXPR void on_zero() { res = ZERO; } + + FMT_CONSTEXPR void on_width(int w) { width = w; } + FMT_CONSTEXPR void on_dynamic_width(fmt::detail::auto_id) {} + FMT_CONSTEXPR void on_dynamic_width(int index) { width_ref = index; } + FMT_CONSTEXPR void on_dynamic_width(string_view) {} + + FMT_CONSTEXPR void on_precision(int p) { precision = p; } + FMT_CONSTEXPR void on_dynamic_precision(fmt::detail::auto_id) {} + FMT_CONSTEXPR void on_dynamic_precision(int index) { precision_ref = index; } + FMT_CONSTEXPR void on_dynamic_precision(string_view) {} + + FMT_CONSTEXPR void end_precision() {} + FMT_CONSTEXPR void on_type(char t) { type = t; } + FMT_CONSTEXPR void on_error(const char*) { res = ERROR; } +}; + +template <size_t N> +FMT_CONSTEXPR test_format_specs_handler parse_test_specs(const char (&s)[N]) { + test_format_specs_handler h; + fmt::detail::parse_format_specs(s, s + N, h); + return h; +} + +TEST(FormatTest, ConstexprParseFormatSpecs) { + typedef test_format_specs_handler handler; + static_assert(parse_test_specs("<").align == fmt::align::left, ""); + static_assert(parse_test_specs("*^").fill == '*', ""); + static_assert(parse_test_specs("+").res == handler::PLUS, ""); + static_assert(parse_test_specs("-").res == handler::MINUS, ""); + static_assert(parse_test_specs(" ").res == handler::SPACE, ""); + static_assert(parse_test_specs("#").res == handler::HASH, ""); + static_assert(parse_test_specs("0").res == handler::ZERO, ""); + 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 == 'd', ""); + static_assert(parse_test_specs("{<").res == handler::ERROR, ""); +} + +struct test_parse_context { + typedef char char_type; + + FMT_CONSTEXPR int next_arg_id() { return 11; } + template <typename Id> FMT_CONSTEXPR void check_arg_id(Id) {} + + FMT_CONSTEXPR const char* begin() { return nullptr; } + FMT_CONSTEXPR const char* end() { return nullptr; } + + void on_error(const char*) {} +}; + +struct test_context { + using char_type = char; + using format_arg = fmt::basic_format_arg<test_context>; + using parse_context_type = fmt::format_parse_context; + + template <typename T> struct formatter_type { + typedef fmt::formatter<T, char_type> type; + }; + + template <typename Id> + FMT_CONSTEXPR fmt::basic_format_arg<test_context> arg(Id id) { + return fmt::detail::make_arg<test_context>(id); + } + + void on_error(const char*) {} + + FMT_CONSTEXPR test_context error_handler() { return *this; } +}; + +template <size_t N> +FMT_CONSTEXPR fmt::format_specs parse_specs(const char (&s)[N]) { + auto specs = fmt::format_specs(); + auto parse_ctx = test_parse_context(); + auto ctx = test_context(); + fmt::detail::specs_handler<test_parse_context, test_context> h( + specs, parse_ctx, ctx); + parse_format_specs(s, s + N, h); + return specs; +} + +TEST(FormatTest, ConstexprSpecsHandler) { + static_assert(parse_specs("<").align == fmt::align::left, ""); + static_assert(parse_specs("*^").fill[0] == '*', ""); + static_assert(parse_specs("+").sign == fmt::sign::plus, ""); + static_assert(parse_specs("-").sign == fmt::sign::minus, ""); + static_assert(parse_specs(" ").sign == fmt::sign::space, ""); + static_assert(parse_specs("#").alt, ""); + static_assert(parse_specs("0").align == fmt::align::numeric, ""); + static_assert(parse_specs("42").width == 42, ""); + static_assert(parse_specs("{}").width == 11, ""); + static_assert(parse_specs("{22}").width == 22, ""); + static_assert(parse_specs(".42").precision == 42, ""); + static_assert(parse_specs(".{}").precision == 11, ""); + static_assert(parse_specs(".{22}").precision == 22, ""); + static_assert(parse_specs("d").type == 'd', ""); +} + +template <size_t N> +FMT_CONSTEXPR fmt::detail::dynamic_format_specs<char> parse_dynamic_specs( + const char (&s)[N]) { + fmt::detail::dynamic_format_specs<char> specs; + test_parse_context ctx{}; + fmt::detail::dynamic_specs_handler<test_parse_context> h(specs, ctx); + parse_format_specs(s, s + N, h); + return specs; +} + +TEST(FormatTest, ConstexprDynamicSpecsHandler) { + 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 == 'd', ""); +} + +template <size_t N> +FMT_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, checker); + return checker; +} + +TEST(FormatTest, ConstexprSpecsChecker) { + typedef test_format_specs_handler handler; + static_assert(check_specs("<").align == fmt::align::left, ""); + static_assert(check_specs("*^").fill == '*', ""); + static_assert(check_specs("+").res == handler::PLUS, ""); + static_assert(check_specs("-").res == handler::MINUS, ""); + static_assert(check_specs(" ").res == handler::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 == 'd', ""); + static_assert(check_specs("{<").res == handler::ERROR, ""); +} + +struct test_format_string_handler { + FMT_CONSTEXPR void on_text(const char*, const char*) {} + + FMT_CONSTEXPR void on_arg_id() {} + + template <typename T> FMT_CONSTEXPR void on_arg_id(T) {} + + FMT_CONSTEXPR void on_replacement_field(const char*) {} + + FMT_CONSTEXPR const char* on_format_specs(const char* begin, const char*) { + return begin; + } + + FMT_CONSTEXPR void on_error(const char*) { error = true; } + + bool error = false; +}; + +template <size_t N> FMT_CONSTEXPR bool parse_string(const char (&s)[N]) { + test_format_string_handler h; + fmt::detail::parse_format_string<true>(fmt::string_view(s, N - 1), h); + return !h.error; +} + +TEST(FormatTest, ConstexprParseFormatString) { + 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("{:}"), ""); +} + +struct test_error_handler { + const char*& error; + + FMT_CONSTEXPR test_error_handler(const char*& err) : error(err) {} + + FMT_CONSTEXPR test_error_handler(const test_error_handler& other) + : error(other.error) {} + + FMT_CONSTEXPR void on_error(const char* message) { + if (!error) error = message; + } +}; + +FMT_CONSTEXPR size_t len(const char* s) { + size_t len = 0; + while (*s++) ++len; + return len; +} + +FMT_CONSTEXPR bool equal(const char* s1, const char* s2) { + if (!s1 || !s2) return s1 == s2; + while (*s1 && *s1 == *s2) { + ++s1; + ++s2; + } + return *s1 == *s2; +} + +template <typename... Args> +FMT_CONSTEXPR bool test_error(const char* fmt, const char* expected_error) { + const char* actual_error = nullptr; + string_view s(fmt, len(fmt)); + fmt::detail::format_string_checker<char, test_error_handler, Args...> checker( + s, test_error_handler(actual_error)); + fmt::detail::parse_format_string<true>(s, checker); + return equal(actual_error, expected_error); +} + +# define EXPECT_ERROR_NOARGS(fmt, error) \ + static_assert(test_error(fmt, error), "") +# define EXPECT_ERROR(fmt, error, ...) \ + static_assert(test_error<__VA_ARGS__>(fmt, error), "") + +TEST(FormatTest, FormatStringErrors) { + EXPECT_ERROR_NOARGS("foo", nullptr); + EXPECT_ERROR_NOARGS("}", "unmatched '}' in format string"); + EXPECT_ERROR("{0:s", "unknown format specifier", Date); +# if !FMT_MSC_VER || FMT_MSC_VER >= 1916 + // This causes an detail compiler error in MSVC2017. + EXPECT_ERROR("{:{<}", "invalid fill character '{'", int); + EXPECT_ERROR("{:10000000000}", "number is too big", int); + EXPECT_ERROR("{:.10000000000}", "number is too big", int); + EXPECT_ERROR_NOARGS("{:x}", "argument not found"); +# if FMT_NUMERIC_ALIGN + EXPECT_ERROR("{0:=5", "unknown format specifier", int); + EXPECT_ERROR("{:=}", "format specifier requires numeric argument", + const char*); +# endif + EXPECT_ERROR("{:+}", "format specifier requires numeric argument", + const char*); + EXPECT_ERROR("{:-}", "format specifier requires numeric argument", + const char*); + EXPECT_ERROR("{:#}", "format specifier requires numeric argument", + const char*); + EXPECT_ERROR("{: }", "format specifier requires numeric argument", + const char*); + EXPECT_ERROR("{:0}", "format specifier requires numeric argument", + const char*); + EXPECT_ERROR("{:+}", "format specifier requires signed argument", unsigned); + EXPECT_ERROR("{:-}", "format specifier requires signed argument", unsigned); + EXPECT_ERROR("{: }", "format specifier requires signed argument", unsigned); + EXPECT_ERROR("{:{}}", "argument not found", int); + EXPECT_ERROR("{:.{}}", "argument not found", double); + EXPECT_ERROR("{:.2}", "precision not allowed for this argument type", int); + EXPECT_ERROR("{:s}", "invalid type specifier", int); + EXPECT_ERROR("{:s}", "invalid type specifier", bool); + EXPECT_ERROR("{:s}", "invalid type specifier", char); + EXPECT_ERROR("{:+}", "invalid format specifier for char", char); + EXPECT_ERROR("{:s}", "invalid type specifier", double); + EXPECT_ERROR("{:d}", "invalid type specifier", const char*); + EXPECT_ERROR("{:d}", "invalid type specifier", std::string); + EXPECT_ERROR("{:s}", "invalid type specifier", void*); +# else + fmt::print("warning: constexpr is broken in this version of MSVC\n"); +# endif + EXPECT_ERROR("{foo", "compile-time checks don't support named arguments", + int); + EXPECT_ERROR_NOARGS("{10000000000}", "number is too big"); + EXPECT_ERROR_NOARGS("{0x}", "invalid format string"); + EXPECT_ERROR_NOARGS("{-}", "invalid format string"); + EXPECT_ERROR("{:{0x}}", "invalid format string", int); + EXPECT_ERROR("{:{-}}", "invalid format string", int); + EXPECT_ERROR("{:.{0x}}", "invalid format string", int); + EXPECT_ERROR("{:.{-}}", "invalid format string", int); + EXPECT_ERROR("{:.x}", "missing precision specifier", int); + EXPECT_ERROR_NOARGS("{}", "argument not found"); + EXPECT_ERROR("{1}", "argument not found", int); + EXPECT_ERROR("{1}{}", + "cannot switch from manual to automatic argument indexing", int, + int); + EXPECT_ERROR("{}{1}", + "cannot switch from automatic to manual argument indexing", int, + int); +} + +TEST(FormatTest, VFormatTo) { + typedef fmt::format_context context; + fmt::basic_format_arg<context> arg = fmt::detail::make_arg<context>(42); + fmt::basic_format_args<context> args(&arg, 1); + std::string s; + fmt::vformat_to(std::back_inserter(s), "{}", args); + EXPECT_EQ("42", s); + s.clear(); + fmt::vformat_to(std::back_inserter(s), FMT_STRING("{}"), args); + EXPECT_EQ("42", s); + + typedef fmt::wformat_context wcontext; + fmt::basic_format_arg<wcontext> warg = fmt::detail::make_arg<wcontext>(42); + fmt::basic_format_args<wcontext> wargs(&warg, 1); + std::wstring w; + fmt::vformat_to(std::back_inserter(w), L"{}", wargs); + EXPECT_EQ(L"42", w); + w.clear(); + fmt::vformat_to(std::back_inserter(w), FMT_STRING(L"{}"), wargs); + EXPECT_EQ(L"42", w); +} + +template <typename T> static std::string FmtToString(const T& t) { + return fmt::format(FMT_STRING("{}"), t); +} + +TEST(FormatTest, FmtStringInTemplate) { + EXPECT_EQ(FmtToString(1), "1"); + EXPECT_EQ(FmtToString(0), "0"); +} + +#endif // FMT_USE_CONSTEXPR + +TEST(FormatTest, EmphasisNonHeaderOnly) { + // Ensure this compiles even if FMT_HEADER_ONLY is not defined. + EXPECT_EQ(fmt::format(fmt::emphasis::bold, "bold error"), + "\x1b[1mbold error\x1b[0m"); +} + +TEST(FormatTest, CharTraitsIsNotAmbiguous) { + // Test that we don't inject detail names into the std namespace. + using namespace std; + char_traits<char>::char_type c; + (void)c; +#if __cplusplus >= 201103L + std::string s; + auto lval = begin(s); + (void)lval; +#endif +} + +struct mychar { + int value; + mychar() = default; + + template <typename T> mychar(T val) : value(static_cast<int>(val)) {} + + operator int() const { return value; } +}; + +FMT_BEGIN_NAMESPACE +template <> struct is_char<mychar> : std::true_type {}; +FMT_END_NAMESPACE + +TEST(FormatTest, FormatCustomChar) { + const mychar format[] = {'{', '}', 0}; + auto result = fmt::format(format, mychar('x')); + EXPECT_EQ(result.size(), 1); + EXPECT_EQ(result[0], mychar('x')); +} + +// Convert a char8_t string to std::string. Otherwise GTest will insist on +// inserting `char8_t` NTBS into a `char` stream which is disabled by P1423. +template <typename S> std::string from_u8str(const S& str) { + return std::string(str.begin(), str.end()); +} + +TEST(FormatTest, FormatUTF8Precision) { + using str_type = std::basic_string<fmt::detail::char8_type>; + str_type format(reinterpret_cast<const fmt::detail::char8_type*>(u8"{:.4}")); + str_type str(reinterpret_cast<const fmt::detail::char8_type*>( + u8"caf\u00e9s")); // cafés + auto result = fmt::format(format, str); + EXPECT_EQ(fmt::detail::count_code_points(result), 4); + EXPECT_EQ(result.size(), 5); + EXPECT_EQ(from_u8str(result), from_u8str(str.substr(0, 5))); +} |