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improve enum_value for dense enums

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neargye 2019-09-30 19:08:29 +05:00
parent 77918a74c5
commit 92dfab4ac4
1 changed files with 6 additions and 1 deletions
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7
include/magic_enum.hpp
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@ -33,6 +33,7 @@
#define NEARGYE_MAGIC_ENUM_HPP #define NEARGYE_MAGIC_ENUM_HPP
#include <array> #include <array>
#include <cassert>
#include <cstddef> #include <cstddef>
#include <iosfwd> #include <iosfwd>
#include <limits> #include <limits>
@ -397,7 +398,11 @@ struct enum_traits<E, std::enable_if_t<detail::is_enum_v<E>>> {
} }
[[nodiscard]] static constexpr E value(std::size_t index) noexcept { [[nodiscard]] static constexpr E value(std::size_t index) noexcept {
return values[index]; if constexpr (detail::size_v<E> != detail::count_v<E>) {
return assert(index < count), values[index];
} else {
return assert(index < count), static_cast<E>(detail::min_v<E> + index);
}
} }
[[nodiscard]] static constexpr std::string_view name(E value) noexcept { [[nodiscard]] static constexpr std::string_view name(E value) noexcept {