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63 lines
2.8 KiB
C++
63 lines
2.8 KiB
C++
// Formatting library for C++ - formatting library tests
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//
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// Copyright (c) 2012 - present, Victor Zverovich
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// All rights reserved.
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//
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// For the license information refer to format.h.
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#include "fmt/compile.h"
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#include "gmock/gmock.h"
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#if defined(__cpp_lib_bit_cast) && __cpp_lib_bit_cast >= 201806 && \
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defined(__cpp_constexpr) && __cpp_constexpr >= 201907 && \
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defined(__cpp_constexpr_dynamic_alloc) && \
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__cpp_constexpr_dynamic_alloc >= 201907 && FMT_CPLUSPLUS >= 202002L
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template <size_t max_string_length, typename Char = char> struct test_string {
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template <typename T> constexpr bool operator==(const T& rhs) const noexcept {
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return fmt::basic_string_view<Char>(rhs).compare(buffer) == 0;
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}
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Char buffer[max_string_length]{};
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};
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template <size_t max_string_length, typename Char = char, typename... Args>
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consteval auto test_format(auto format, const Args&... args) {
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test_string<max_string_length, Char> string{};
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fmt::format_to(string.buffer, format, args...);
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return string;
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}
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TEST(compile_time_formatting_test, floating_point) {
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EXPECT_EQ("0", test_format<2>(FMT_COMPILE("{}"), 0.0f));
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EXPECT_EQ("392.500000", test_format<11>(FMT_COMPILE("{0:f}"), 392.5f));
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EXPECT_EQ("0", test_format<2>(FMT_COMPILE("{:}"), 0.0));
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EXPECT_EQ("0.000000", test_format<9>(FMT_COMPILE("{:f}"), 0.0));
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EXPECT_EQ("0", test_format<2>(FMT_COMPILE("{:g}"), 0.0));
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EXPECT_EQ("392.65", test_format<7>(FMT_COMPILE("{:}"), 392.65));
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EXPECT_EQ("392.65", test_format<7>(FMT_COMPILE("{:g}"), 392.65));
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EXPECT_EQ("392.65", test_format<7>(FMT_COMPILE("{:G}"), 392.65));
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EXPECT_EQ("4.9014e+06", test_format<11>(FMT_COMPILE("{:g}"), 4.9014e6));
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EXPECT_EQ("-392.650000", test_format<12>(FMT_COMPILE("{:f}"), -392.65));
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EXPECT_EQ("-392.650000", test_format<12>(FMT_COMPILE("{:F}"), -392.65));
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EXPECT_EQ("3.926500e+02", test_format<13>(FMT_COMPILE("{0:e}"), 392.65));
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EXPECT_EQ("3.926500E+02", test_format<13>(FMT_COMPILE("{0:E}"), 392.65));
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EXPECT_EQ("+0000392.6", test_format<11>(FMT_COMPILE("{0:+010.4g}"), 392.65));
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EXPECT_EQ("9223372036854775808.000000",
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test_format<27>(FMT_COMPILE("{:f}"), 9223372036854775807.0));
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constexpr double nan = std::numeric_limits<double>::quiet_NaN();
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EXPECT_EQ("nan", test_format<4>(FMT_COMPILE("{}"), nan));
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EXPECT_EQ("+nan", test_format<5>(FMT_COMPILE("{:+}"), nan));
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if (std::signbit(-nan))
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EXPECT_EQ("-nan", test_format<5>(FMT_COMPILE("{}"), -nan));
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else
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fmt::print("Warning: compiler doesn't handle negative NaN correctly");
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constexpr double inf = std::numeric_limits<double>::infinity();
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EXPECT_EQ("inf", test_format<4>(FMT_COMPILE("{}"), inf));
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EXPECT_EQ("+inf", test_format<5>(FMT_COMPILE("{:+}"), inf));
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EXPECT_EQ("-inf", test_format<5>(FMT_COMPILE("{}"), -inf));
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}
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#endif
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