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more friendly static checks

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neargye 2020-02-14 15:09:03 +05:00
parent 52d7323bca
commit cae43830a3
1 changed files with 5 additions and 6 deletions
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11
include/magic_enum.hpp
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@ -51,7 +51,7 @@
// Checks magic_enum compiler compatibility.
#if defined(__clang__) || defined(__GNUC__) && __GNUC__ >= 9 || defined(_MSC_VER)
# undef MAGIC_ENUM_SUPPORTED
# undef MAGIC_ENUM_SUPPORTED
# define MAGIC_ENUM_SUPPORTED 1
#endif
@ -180,7 +180,6 @@ constexpr auto n() noexcept {
# endif
return static_string<name.size()>{name};
#else
static_assert(supported<E>::value, "magic_enum: Unsupported compiler (https://github.com/Neargye/magic_enum#compiler-compatibility).");
return std::string_view{}; // Unsupported compiler.
#endif
}
@ -199,7 +198,6 @@ constexpr auto n() noexcept {
# endif
return static_string<name.size()>{name};
#else
static_assert(supported<E>::value, "magic_enum: Unsupported compiler (https://github.com/Neargye/magic_enum#compiler-compatibility).");
return std::string_view{}; // Unsupported compiler.
#endif
}
@ -337,11 +335,11 @@ struct underlying_type {};
template <typename T>
struct underlying_type<T, true> : std::underlying_type<std::decay_t<T>> {};
template <typename E, typename = void>
template <typename E, bool = is_enum_v<E>>
struct enum_traits {};
template <typename E>
struct enum_traits<E, std::enable_if_t<is_enum_v<E>>> {
struct enum_traits<E, true> {
using type = E;
using underlying_type = typename detail::underlying_type<E>::type;
@ -393,7 +391,8 @@ struct enum_traits<E, std::enable_if_t<is_enum_v<E>>> {
private:
static_assert(is_enum_v<E>, "magic_enum::enum_traits requires enum type.");
static_assert(count > 0, "magic_enum::enum_range requires enum implementation or valid max and min.");
static_assert(supported<E>::value, "magic_enum unsupported compiler (https://github.com/Neargye/magic_enum#compiler-compatibility).");
static_assert(count > 0, "magic_enum::enum_range requires enum implementation and valid max and min.");
using U = underlying_type;
inline static constexpr auto indexes = detail::indexes<E>(std::make_integer_sequence<int, range_size_v<E>>{});
};