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add fmt support

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neargye 2023-05-19 19:36:50 +04:00
parent 5367f5183c
commit 737ed4fc7f
6 changed files with 42 additions and 27 deletions
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37
include/magic_enum_format.hpp
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@ -32,14 +32,10 @@
#ifndef NEARGYE_MAGIC_ENUM_FORMAT_HPP
#define NEARGYE_MAGIC_ENUM_FORMAT_HPP
#if !defined(__cpp_lib_format)
# error "Format is not supported"
#endif
#include "magic_enum.hpp"
#if !defined(MAGIC_ENUM_DEFAULT_ENABLE_ENUM_FORMAT)
# define MAGIC_ENUM_DEFAULT_ENABLE_ENUM_FORMAT true
# define MAGIC_ENUM_DEFAULT_ENABLE_ENUM_FORMAT 1
# define MAGIC_ENUM_DEFAULT_ENABLE_ENUM_FORMAT_AUTO_DEFINE
#endif // MAGIC_ENUM_DEFAULT_ENABLE_ENUM_FORMAT
@ -51,23 +47,48 @@ namespace magic_enum::customize {
}
} // magic_enum::customize
#if defined(__cpp_lib_format)
#include <format>
template <typename E>
struct std::formatter<E, std::enable_if_t<std::is_enum_v<E> && magic_enum::customize::enum_format_enabled<E>(), char>> : std::formatter<std::string_view, char> {
struct std::formatter<E, std::enable_if_t<std::is_enum_v<std::decay_t<E>> && magic_enum::customize::enum_format_enabled<E>(), char>> : std::formatter<std::string_view, char> {
auto format(E e, format_context& ctx) const {
static_assert(std::is_same_v<char, string_view::value_type>, "formatter requires string_view::value_type type same as char.");
using D = std::decay_t<E>;
if constexpr (magic_enum::detail::supported<D>::value) {
if (const auto name = magic_enum::enum_name<D, magic_enum::as_flags<magic_enum::detail::is_flags_v<D>>>(e); !name.empty()) {
return std::formatter<std::string_view, char>::format(std::string_view{name.data(), name.size()}, ctx);
return formatter<std::string_view, char>::format(std::string_view{name.data(), name.size()}, ctx);
}
}
return std::formatter<std::string_view, char>::format(std::to_string(magic_enum::enum_integer<D>(e)), ctx);
return formatter<std::string_view, char>::format(std::to_string(magic_enum::enum_integer<D>(e)), ctx);
}
};
#endif // MAGIC_ENUM_DEFAULT_ENABLE_ENUM_FORMAT
#if defined(FMT_VERSION)
#include <fmt/format.h>
template <typename E>
struct fmt::formatter<E, std::enable_if_t<std::is_enum_v<std::decay_t<E>> && magic_enum::customize::enum_format_enabled<E>(), char>> : fmt::formatter<std::string_view, char> {
auto format(E e, format_context& ctx) {
static_assert(std::is_same_v<char, string_view::value_type>, "formatter requires string_view::value_type type same as char.");
using D = std::decay_t<E>;
if constexpr (magic_enum::detail::supported<D>::value) {
if (const auto name = magic_enum::enum_name<D, magic_enum::as_flags<magic_enum::detail::is_flags_v<D>>>(e); !name.empty()) {
return formatter<std::string_view, char>::format(std::string_view{name.data(), name.size()}, ctx);
}
}
return formatter<std::string_view, char>::format(std::to_string(magic_enum::enum_integer<D>(e)), ctx);
}
};
#endif // FMT_VERSION
#if defined(MAGIC_ENUM_DEFAULT_ENABLE_ENUM_FORMAT_AUTO_DEFINE)
# undef MAGIC_ENUM_DEFAULT_ENABLE_ENUM_FORMAT
# undef MAGIC_ENUM_DEFAULT_ENABLE_ENUM_FORMAT_AUTO_DEFINE