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atomic_flag formatting (#3594)

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Alex Guteniev 2023-08-25 18:06:10 +03:00 committed by GitHub
parent a21690bdfa
commit 9b74160817
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2 changed files with 24 additions and 0 deletions
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13
include/fmt/std.h
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@ -448,5 +448,18 @@ struct formatter<std::atomic<T>, Char,
}
};
#ifdef __cpp_lib_atomic_flag_test
FMT_EXPORT
template <typename Char>
struct formatter<std::atomic_flag, Char>
: formatter<bool, Char> {
template <typename FormatContext>
auto format(const std::atomic_flag& v, FormatContext& ctx) const
-> decltype(ctx.out()) {
return formatter<bool, Char>::format(v.test(), ctx);
}
};
#endif // __cpp_lib_atomic_flag_test
FMT_END_NAMESPACE
#endif // FMT_STD_H_

11
test/std-test.cc
View File

@ -244,3 +244,14 @@ TEST(std_test, format_atomic) {
const std::atomic<bool> cb(true);
EXPECT_EQ(fmt::format("{}", cb), "true");
}
#ifdef __cpp_lib_atomic_flag_test
TEST(std_test, format_atomic_flag) {
std::atomic_flag f = ATOMIC_FLAG_INIT;
(void) f.test_and_set();
EXPECT_EQ(fmt::format("{}", f), "true");
const std::atomic_flag cf = ATOMIC_FLAG_INIT;
EXPECT_EQ(fmt::format("{}", cf), "false");
}
#endif // __cpp_lib_atomic_flag_test