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fix nameof_enum

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terik23 2019-04-23 18:10:21 +05:00
parent a6b8f792ef
commit cf40c88895
1 changed files with 3 additions and 1 deletions
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4
include/nameof.hpp
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@ -222,10 +222,12 @@ template <typename T>
} // namespace nameof::detail } // namespace nameof::detail
// Obtains simple (unqualified) string enum name of enum variable. // Obtains simple (unqualified) string enum name of enum variable.
template <typename E, typename D = std::decay_t<E>, typename U = std::underlying_type_t<D>, typename = std::enable_if_t<std::is_enum_v<D>>> template <typename E, typename = std::enable_if_t<std::is_enum_v<std::decay_t<E>>>>
[[nodiscard]] constexpr std::string_view nameof_enum(E value) noexcept { [[nodiscard]] constexpr std::string_view nameof_enum(E value) noexcept {
using D = std::decay_t<E>;
static_assert(std::is_enum_v<D>, "nameof::nameof_enum requires enum type."); static_assert(std::is_enum_v<D>, "nameof::nameof_enum requires enum type.");
static_assert(enum_range<D>::max > enum_range<D>::min, "nameof::enum_range requires max > min."); static_assert(enum_range<D>::max > enum_range<D>::min, "nameof::enum_range requires max > min.");
using U = std::underlying_type_t<D>;
constexpr int max = enum_range<D>::max < (std::numeric_limits<U>::max)() ? enum_range<D>::max : (std::numeric_limits<U>::max)(); constexpr int max = enum_range<D>::max < (std::numeric_limits<U>::max)() ? enum_range<D>::max : (std::numeric_limits<U>::max)();
constexpr int min = enum_range<D>::min > (std::numeric_limits<U>::min)() ? enum_range<D>::min : (std::numeric_limits<U>::min)(); constexpr int min = enum_range<D>::min > (std::numeric_limits<U>::min)() ? enum_range<D>::min : (std::numeric_limits<U>::min)();
constexpr auto range = std::make_integer_sequence<int, max - min + 1>{}; constexpr auto range = std::make_integer_sequence<int, max - min + 1>{};