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fix 379

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neargye 2024-10-14 18:19:39 +03:00
parent a72a0536c7
commit e77ff3bdd6
1 changed files with 17 additions and 59 deletions
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76
include/magic_enum/magic_enum_format.hpp
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@ -35,18 +35,23 @@
#include "magic_enum.hpp"
#include "magic_enum_flags.hpp"
#if !defined(MAGIC_ENUM_DEFAULT_ENABLE_ENUM_FORMAT)
# define MAGIC_ENUM_DEFAULT_ENABLE_ENUM_FORMAT 1
# define MAGIC_ENUM_DEFAULT_ENABLE_ENUM_FORMAT_AUTO_DEFINE
#endif
template <typename E, std::enable_if_t<std::is_enum_v<std::decay_t<E>>, int> = 0>
std::string format_as(E e) {
using D = std::decay_t<E>;
namespace magic_enum::customize {
// customize enum to enable/disable automatic std::format
template <typename E>
constexpr bool enum_format_enabled() noexcept {
return MAGIC_ENUM_DEFAULT_ENABLE_ENUM_FORMAT;
if constexpr (magic_enum::detail::supported<D>::value) {
if constexpr (magic_enum::detail::subtype_v<D> == magic_enum::detail::enum_subtype::flags) {
if (const auto name = magic_enum::enum_flags_name<D>(e); !name.empty()) {
return {name.data(), name.size()};
}
} // magic_enum::customize
} else {
if (const auto name = magic_enum::enum_name<D>(e); !name.empty()) {
return {name.data(), name.size()};
}
}
}
return std::to_string(magic_enum::enum_integer<D>(e));
}
#if defined(__cpp_lib_format)
@ -55,60 +60,13 @@ namespace magic_enum::customize {
#endif
template <typename E>
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> {
struct std::formatter<E, std::enable_if_t<std::is_enum_v<std::decay_t<E>>, char>> : std::formatter<std::string_view, char> {
template <class FormatContext>
auto format(E e, FormatContext& 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 constexpr (magic_enum::detail::subtype_v<D> == magic_enum::detail::enum_subtype::flags) {
if (const auto name = magic_enum::enum_flags_name<D>(e); !name.empty()) {
return formatter<std::string_view, char>::format(std::string_view{name.data(), name.size()}, ctx);
}
} else {
if (const auto name = magic_enum::enum_name<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);
return formatter<std::string_view, char>::format(format_as<E>(e), ctx);
}
};
#endif
#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> {
template <class FormatContext>
auto format(E e, FormatContext& 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 constexpr (magic_enum::detail::subtype_v<D> == magic_enum::detail::enum_subtype::flags) {
if (const auto name = magic_enum::enum_flags_name<D>(e); !name.empty()) {
return formatter<std::string_view, char>::format(std::string_view{name.data(), name.size()}, ctx);
}
} else {
if (const auto name = magic_enum::enum_name<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
#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
#endif
#endif // NEARGYE_MAGIC_ENUM_FORMAT_HPP