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fix range check

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This commit is contained in:
neargye 2021-04-22 12:43:04 +03:00
parent 1db1f585f4
commit 5b282dd4e8
1 changed files with 13 additions and 17 deletions
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30
include/magic_enum.hpp
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@ -358,6 +358,17 @@ constexpr bool is_valid() noexcept {
return n<E, static_cast<E>(V)>().size() != 0;
}
template <typename E, int O, bool IsFlags = false, typename U = std::underlying_type_t<E>>
constexpr E value(std::size_t i) noexcept {
static_assert(is_enum_v<E>, "magic_enum::detail::value requires enum type.");
if constexpr (IsFlags) {
return static_cast<E>(U{1} << static_cast<U>(static_cast<int>(i) + O));
} else {
return static_cast<E>(static_cast<int>(i) + O);
}
}
template <typename E, bool IsFlags, typename U = std::underlying_type_t<E>>
constexpr int reflected_min() noexcept {
static_assert(is_enum_v<E>, "magic_enum::detail::reflected_min requires enum type.");
@ -372,6 +383,7 @@ constexpr int reflected_min() noexcept {
if constexpr (cmp_less(lhs, rhs)) {
return rhs;
} else {
static_assert(!is_valid<E, value<E, lhs - 1, IsFlags>(0)>(), "magic_enum::enum_range detects enum value smaller than min range size.");
return lhs;
}
}
@ -389,6 +401,7 @@ constexpr int reflected_max() noexcept {
constexpr auto rhs = (std::numeric_limits<U>::max)();
if constexpr (cmp_less(lhs, rhs)) {
static_assert(!is_valid<E, value<E, lhs + 1, IsFlags>(0)>(), "magic_enum::enum_range detects enum value larger than max range size.");
return lhs;
} else {
return rhs;
@ -402,17 +415,6 @@ inline constexpr auto reflected_min_v = reflected_min<E, IsFlags>();
template <typename E, bool IsFlags = false>
inline constexpr auto reflected_max_v = reflected_max<E, IsFlags>();
template <typename E, int O, bool IsFlags = false, typename U = std::underlying_type_t<E>>
constexpr E value(std::size_t i) noexcept {
static_assert(is_enum_v<E>, "magic_enum::detail::value requires enum type.");
if constexpr (IsFlags) {
return static_cast<E>(U{1} << static_cast<U>(static_cast<int>(i) + O));
} else {
return static_cast<E>(static_cast<int>(i) + O);
}
}
template <std::size_t N>
constexpr std::size_t values_count(const bool (&valid)[N]) noexcept {
auto count = std::size_t{0};
@ -453,12 +455,6 @@ constexpr auto values() noexcept {
constexpr auto range_size = max - min + 1;
static_assert(range_size > 0, "magic_enum::enum_range requires valid size.");
static_assert(range_size < (std::numeric_limits<std::uint16_t>::max)(), "magic_enum::enum_range requires valid size.");
if constexpr (cmp_less((std::numeric_limits<U>::min)(), min) && !IsFlags) {
static_assert(!is_valid<E, value<E, min - 1, IsFlags>(0)>(), "magic_enum::enum_range detects enum value smaller than min range size.");
}
if constexpr (cmp_less(range_size, (std::numeric_limits<U>::max)()) && !IsFlags) {
static_assert(!is_valid<E, value<E, min, IsFlags>(range_size + 1)>(), "magic_enum::enum_range detects enum value larger than max range size.");
}
return values<E, IsFlags, reflected_min_v<E, IsFlags>>(std::make_index_sequence<range_size>{});
}