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atomic_flag formatting #3594

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merged 6 commits into from
Aug 25, 2023
Merged

atomic_flag formatting #3594

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08663e4
Implement `atomic_flag` formatter
AlexGuteniev Aug 14, 2023
4499c61
Test
AlexGuteniev Aug 14, 2023
f45cfad
Update std-test.cc
AlexGuteniev Aug 14, 2023
461637e
true
AlexGuteniev Aug 14, 2023
1b22c50
don't check the feature version in product code
AlexGuteniev Aug 25, 2023
5803462
don't check the feature version in test code
AlexGuteniev Aug 25, 2023
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13 changes: 13 additions & 0 deletions include/fmt/std.h
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Original file line number Diff line number Diff line change
Expand Up @@ -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 changes: 11 additions & 0 deletions test/std-test.cc
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Expand Up @@ -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