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Add formatter for std::source_location (#3730)

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Félix-Antoine Constantin 2023-11-30 13:05:56 -05:00 committed by GitHub
parent 8f83ee2ad1
commit 99b9fbf8ef
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2 changed files with 40 additions and 0 deletions
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30
include/fmt/std.h
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@ -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>
@ -239,6 +243,32 @@ 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 {

10
test/std-test.cc
View File

@ -66,6 +66,16 @@ 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");