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fix enums

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This commit is contained in:
neargye 2019-10-01 18:55:37 +05:00
parent a8dac47ada
commit 47fa9b5f7c
1 changed files with 22 additions and 22 deletions
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44
include/nameof.hpp
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@ -235,6 +235,9 @@ using remove_cvref_t = std::remove_cv_t<std::remove_reference_t<T>>;
template <typename T, typename R>
using enable_if_enum_t = std::enable_if_t<std::is_enum_v<T>, R>;
template <typename E>
inline constexpr bool is_enum_v = std::is_enum_v<E> && std::is_same_v<E, std::decay_t<E>>;
constexpr std::string_view pretty_name(std::string_view name, bool remove_template_suffix = true) noexcept {
if (name.size() >= 1 && (name[0] == '"' || name[0] == '\'')) {
return {}; // Narrow multibyte string literal.
@ -316,7 +319,7 @@ constexpr std::string_view pretty_name(std::string_view name, bool remove_templa
template <typename E, E V>
constexpr auto n() noexcept {
static_assert(std::is_enum_v<E>, "nameof::detail::n requires enum type.");
static_assert(is_enum_v<E>, "nameof::detail::n requires enum type.");
#if defined(__clang__) || defined(__GNUC__)
constexpr auto name = pretty_name({__PRETTY_FUNCTION__, sizeof(__PRETTY_FUNCTION__) - 2});
#elif defined(_MSC_VER)
@ -336,9 +339,6 @@ inline constexpr auto enum_name_v = n<E, V>();
namespace enums {
template <typename E>
inline constexpr bool is_enum_v = std::is_enum_v<E> && std::is_same_v<E, std::decay_t<E>>;
template <typename E>
inline constexpr int reflected_min_v = static_cast<int>(enum_range<E>::min > (std::numeric_limits<std::underlying_type_t<E>>::min)()
? enum_range<E>::min
@ -472,30 +472,30 @@ constexpr auto strings() noexcept {
}
template <typename E>
struct enum_traits {
static constexpr std::string_view name(E value) noexcept {
if (static_cast<U>(value) >= static_cast<U>(min_v<E>) && static_cast<U>(value) <= static_cast<U>(max_v<E>)) {
if constexpr (sparsity_v<E>) {
if (auto i = indexes[static_cast<U>(value) - min_v<E>]; i != invalid_index_v<E>) {
return strings[i];
}
} else {
return strings[static_cast<U>(value) - min_v<E>];
}
}
return {}; // Value out of range.
}
private:
class enum_traits final {
static_assert(is_enum_v<E>, "nameof::enum_traits requires enum type.");
static_assert(enum_range<E>::min > (std::numeric_limits<std::int16_t>::min)(), "nameof::enum_range requires min must be greater than INT16_MIN.");
static_assert(enum_range<E>::max < (std::numeric_limits<std::int16_t>::max)(), "nameof::enum_range requires max must be less than INT16_MAX.");
static_assert(enum_range<E>::max > enum_range<E>::min, "nameof::enum_range requires max > min.");
static_assert(count_v<E> > 0, "nameof::enum_range requires enum implementation or valid max and min.");
using U = std::underlying_type_t<E>;
inline static constexpr auto strings = strings<E>();
inline static constexpr auto indexes = indexes<E>(range_v<E>);
inline static constexpr auto strings_ = strings<E>();
inline static constexpr auto indexes_ = indexes<E>(range_v<E>);
public:
static constexpr std::string_view name(E value) noexcept {
if (static_cast<U>(value) >= static_cast<U>(min_v<E>) && static_cast<U>(value) <= static_cast<U>(max_v<E>)) {
if constexpr (sparsity_v<E>) {
if (auto i = indexes_[static_cast<U>(value) - min_v<E>]; i != invalid_index_v<E>) {
return strings_[i];
}
} else {
return strings_[static_cast<U>(value) - min_v<E>];
}
}
return {}; // Value out of range.
}
};
} // namespace nameof::detail::enums