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fix type cast nameof_enum

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This commit is contained in:
neargye 2019-08-29 18:48:54 +05:00
parent 7f1ed8b98f
commit 4172418e59
1 changed files with 7 additions and 3 deletions
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10
include/nameof.hpp
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@ -281,11 +281,15 @@ template <typename E>
static_assert(enum_range<D>::max < (std::numeric_limits<int>::max)(), "nameof::enum_range requires max must be less than INT_MAX.");
static_assert(enum_range<D>::max > enum_range<D>::min, "nameof::enum_range requires max > min.");
using U = std::underlying_type_t<D>;
constexpr auto max = enum_range<D>::max < (std::numeric_limits<U>::max)() ? enum_range<D>::max : (std::numeric_limits<U>::max)();
constexpr auto min = enum_range<D>::min > (std::numeric_limits<U>::min)() ? enum_range<D>::min : (std::numeric_limits<U>::min)();
constexpr int max = static_cast<int>(enum_range<D>::max < (std::numeric_limits<U>::max)() ? enum_range<D>::max : (std::numeric_limits<U>::max)());
constexpr int min = static_cast<int>(enum_range<D>::min > (std::numeric_limits<U>::min)() ? enum_range<D>::min : (std::numeric_limits<U>::min)());
constexpr auto names = detail::enum_names<D, min>(std::make_integer_sequence<int, max - min + 1>{});
if (auto i = static_cast<std::size_t>(static_cast<int>(value) - min); i < names.size()) {
if (static_cast<U>(value) > static_cast<U>(max) || static_cast<U>(value) < static_cast<U>(min)) {
return {}; // Value out of range.
}
if (auto i = static_cast<std::size_t>(static_cast<U>(value) - min); i < names.size()) {
return names[i];
}