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Added formatter for std::source_location #3730

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merged 3 commits into from
Nov 30, 2023
Merged

Added formatter for std::source_location #3730

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54eaa8c
Added formatter for std::source_location
felix642 Nov 28, 2023
d2204a8
fixup! Added formatter for std::source_location
felix642 Nov 30, 2023
ebd76ae
Changed writeBytes to write for file_name
felix642 Nov 30, 2023
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30 changes: 30 additions & 0 deletions include/fmt/std.h
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,10 @@
# endif
#endif

#if FMT_CPLUSPLUS > 201703L && FMT_HAS_INCLUDE(<source_location>)
# include <source_location>
#endif

// GCC 4 does not support FMT_HAS_INCLUDE.
#if FMT_HAS_INCLUDE(<cxxabi.h>) || defined(__GLIBCXX__)
# include <cxxabi.h>
Expand Down Expand Up @@ -228,6 +232,32 @@ struct formatter<std::optional<T>, Char,
FMT_END_NAMESPACE
#endif // __cpp_lib_optional

#ifdef __cpp_lib_source_location
FMT_BEGIN_NAMESPACE
FMT_EXPORT
template<>
struct formatter<std::source_location> {
template <typename ParseContext> FMT_CONSTEXPR auto parse(ParseContext& ctx) {
return ctx.begin();
}

template <typename FormatContext>
auto format(const std::source_location& loc, FormatContext& ctx) const
-> decltype(ctx.out()) {
auto out = ctx.out();
out = detail::write(out, loc.file_name());
out = detail::write(out, ':');
out = detail::write<char>(out, loc.line());
out = detail::write(out, ':');
out = detail::write<char>(out, loc.column());
out = detail::write(out, ": ");
out = detail::write(out, loc.function_name());
return out;
}
};
FMT_END_NAMESPACE
#endif

#if FMT_CPP_LIB_VARIANT
FMT_BEGIN_NAMESPACE
namespace detail {
Expand Down
10 changes: 10 additions & 0 deletions test/std-test.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -62,6 +62,16 @@ TEST(std_test, thread_id) {
EXPECT_FALSE(fmt::format("{}", std::this_thread::get_id()).empty());
}

#ifdef __cpp_lib_source_location
TEST(std_test, source_location) {
std::source_location loc = std::source_location::current();
EXPECT_EQ(fmt::format("{}", loc), std::string(loc.file_name()) + ":" +
std::to_string(loc.line()) + ":" +
std::to_string(loc.column()) + ": " +
loc.function_name());
}
#endif

TEST(std_test, optional) {
#ifdef __cpp_lib_optional
EXPECT_EQ(fmt::format("{}", std::optional<int>{}), "none");
Expand Down