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fix type cast

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This commit is contained in:
neargye 2019-10-03 17:33:18 +05:00
parent 77314d254d
commit 1f61e72c26
1 changed files with 6 additions and 3 deletions
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9
include/magic_enum.hpp
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@ -193,12 +193,13 @@ inline constexpr int reflected_max_v = static_cast<int>(enum_range<E>::max < (st
template <typename E>
constexpr std::size_t reflected_size() {
static_assert(is_enum_v<E>, "magic_enum::detail::range_size requires enum type.");
static_assert(is_enum_v<E>, "magic_enum::detail::reflected_size requires enum type.");
static_assert(reflected_min_v<E> > (std::numeric_limits<std::int16_t>::min)(), "magic_enum::enum_range requires min must be greater than INT16_MIN.");
static_assert(reflected_max_v<E> < (std::numeric_limits<std::int16_t>::max)(), "magic_enum::enum_range requires max must be less than INT16_MAX.");
static_assert(reflected_max_v<E> > reflected_min_v<E>, "magic_enum::enum_range requires max > min.");
constexpr auto size = reflected_max_v<E> - reflected_min_v<E> + 1;
static_assert(size > 0, "magic_enum::enum_range requires valid size.");
static_assert(size < (std::numeric_limits<std::int16_t>::max)(), "magic_enum::enum_range requires valid size.");
return static_cast<std::size_t>(size);
}
@ -232,6 +233,7 @@ constexpr std::size_t range_size() noexcept {
static_assert(is_enum_v<E>, "magic_enum::detail::range_size requires enum type.");
constexpr auto size = max_v<E> - min_v<E> + 1;
static_assert(size > 0, "magic_enum::enum_range requires valid size.");
static_assert(size < (std::numeric_limits<std::int16_t>::max)(), "magic_enum::enum_range requires valid size.");
return static_cast<std::size_t>(size);
}
@ -263,7 +265,7 @@ constexpr auto values(std::integer_sequence<int, I...>) noexcept {
std::array<E, count_v<E>> values{};
for (std::size_t i = 0, v = 0; v < count_v<E>; ++i) {
if (valid[i]) {
values[v++] = static_cast<E>(i + min_v<E>);
values[v++] = static_cast<E>(static_cast<int>(i) + min_v<E>);
}
}
@ -361,7 +363,7 @@ struct enum_traits<E, std::enable_if_t<is_enum_v<E>>> {
if constexpr (size_v<E> != count_v<E>) {
return assert(index < count), values[index];
} else {
return assert(index < count), static_cast<E>(index + min_v<E>);
return assert(index < count), static_cast<E>(static_cast<int>(index) + min_v<E>);
}
}
@ -374,6 +376,7 @@ 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(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.");