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add error if count < 0, fix #15

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neargye 2019-10-01 16:58:35 +05:00
parent 92dfab4ac4
commit 2c0b00a7ed
1 changed files with 1 additions and 0 deletions
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include/magic_enum.hpp
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@ -417,6 +417,7 @@ struct enum_traits<E, std::enable_if_t<detail::is_enum_v<E>>> {
static_assert(enum_range<E>::min > (std::numeric_limits<std::int16_t>::min)(), "magic_enum::enum_range requires min must be greater than INT16_MIN.");
static_assert(enum_range<E>::max < (std::numeric_limits<std::int16_t>::max)(), "magic_enum::enum_range requires max must be less than INT16_MAX.");
static_assert(enum_range<E>::max > enum_range<E>::min, "magic_enum::enum_range requires max > min.");
static_assert(count > 0, "magic_enum::enum_range requires enum implementation or valid max and min.");
using U = underlying_type;
inline static constexpr auto indexes = detail::indexes<E>(detail::range_v<E>);
};