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Add fmt::enums::format_as
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@ -2891,6 +2891,13 @@ constexpr auto underlying(Enum e) noexcept -> underlying_t<Enum> {
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return static_cast<underlying_t<Enum>>(e);
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}
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namespace enums {
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template <typename Enum, FMT_ENABLE_IF(std::is_enum<Enum>::value)>
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constexpr auto format_as(Enum e) noexcept -> underlying_t<Enum> {
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return static_cast<underlying_t<Enum>>(e);
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}
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}
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#ifdef __cpp_lib_byte
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inline auto format_as(std::byte b) -> unsigned char { return underlying(b); }
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FMT_FORMAT_AS(std::byte, unsigned char);
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@ -1459,8 +1459,14 @@ TEST(format_test, write_uintptr_fallback) {
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enum class color { red, green, blue };
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namespace test_ns {
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enum class color { red, green, blue };
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using fmt::enums::format_as;
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} // namespace test_ns
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TEST(format_test, format_enum_class) {
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EXPECT_EQ(fmt::format("{}", fmt::underlying(color::red)), "0");
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EXPECT_EQ(fmt::format("{}", test_ns::color::red), "0");
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}
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TEST(format_test, format_string) {
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