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clean-up

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terik23 2019-04-08 23:06:25 +05:00
parent e2822c66b1
commit 5e74dca32e
1 changed files with 8 additions and 9 deletions
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17
include/nameof.hpp
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@ -193,24 +193,21 @@ template <typename E, E V>
#endif #endif
} }
template <typename E, int... I> template <typename E, int O, int... I>
[[nodiscard]] constexpr decltype(auto) enum_strings_impl(std::integer_sequence<int, I...>) noexcept { [[nodiscard]] constexpr decltype(auto) enum_strings_impl(std::integer_sequence<int, I...>) noexcept {
static_assert(std::is_enum_v<E>, "magic_enum::detail::enum_strings_impl requires enum type."); static_assert(std::is_enum_v<E>, "magic_enum::detail::enum_strings_impl requires enum type.");
using U = std::underlying_type_t<E>; constexpr std::array<std::string_view, sizeof...(I)> enum_names{{enum_name_impl<E, static_cast<E>(I + O)>()...}};
constexpr int min = (enum_range<E>::min > std::numeric_limits<U>::min()) ? enum_range<E>::min : std::numeric_limits<U>::min();
constexpr std::array<std::string_view, sizeof...(I)> enum_names{{enum_name_impl<E, static_cast<E>(I + min)>()...}};
return enum_names; return enum_names;
} }
template <typename E> template <typename E, typename U = std::underlying_type_t<E>>
[[nodiscard]] constexpr std::string_view nameof_enum_impl(int value) noexcept { [[nodiscard]] constexpr std::string_view nameof_enum_impl(int value) noexcept {
static_assert(std::is_enum_v<E>, "magic_enum::detail::nameof_enum_impl requires enum type."); static_assert(std::is_enum_v<E>, "magic_enum::detail::nameof_enum_impl requires enum type.");
using U = std::underlying_type_t<E>;
constexpr int max = (enum_range<E>::max < std::numeric_limits<U>::max()) ? enum_range<E>::max : std::numeric_limits<U>::max(); constexpr int max = (enum_range<E>::max < std::numeric_limits<U>::max()) ? enum_range<E>::max : std::numeric_limits<U>::max();
constexpr int min = (enum_range<E>::min > std::numeric_limits<U>::min()) ? enum_range<E>::min : std::numeric_limits<U>::min(); constexpr int min = (enum_range<E>::min > std::numeric_limits<U>::min()) ? enum_range<E>::min : std::numeric_limits<U>::min();
constexpr auto enum_range = std::make_integer_sequence<int, max - min + 1>{}; constexpr auto enum_range = std::make_integer_sequence<int, max - min + 1>{};
constexpr auto enum_names = enum_strings_impl<E>(enum_range); constexpr auto enum_names = enum_strings_impl<E, min>(enum_range);
const int i = value - min; const int i = value - min;
if (i >= 0 && static_cast<std::size_t>(i) < enum_names.size()) { if (i >= 0 && static_cast<std::size_t>(i) < enum_names.size()) {
@ -233,9 +230,11 @@ template <typename T>
} // namespace detail } // namespace detail
// Obtains simple (unqualified) string enum name of enum variable. // Obtains simple (unqualified) string enum name of enum variable.
template <typename T, typename = std::enable_if_t<std::is_enum_v<std::decay_t<T>>>> template <typename T, typename D = std::decay_t<T>, typename = std::enable_if_t<std::is_enum_v<D>>>
[[nodiscard]] constexpr std::string_view nameof_enum(T value) noexcept { [[nodiscard]] constexpr std::string_view nameof_enum(T value) noexcept {
return detail::nameof_enum_impl<std::decay_t<T>>(static_cast<int>(value)); static_assert(std::is_enum_v<D>, "nameof::nameof_enum requires enum type.");
return detail::nameof_enum_impl<D>(static_cast<int>(value));
} }
// Obtains string name of type. // Obtains string name of type.