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fix clang llvm-project#50055(reviews.llvm.org/D131307)

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This commit is contained in:
neargye 2022-08-12 21:38:20 +04:00
parent 4d2d89eac7
commit db94e8b345
1 changed files with 33 additions and 18 deletions
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51
include/nameof.hpp
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@ -287,7 +287,7 @@ class [[nodiscard]] cstring<0> {
constexpr explicit cstring(string_view) noexcept {}
constexpr cstring() = delete;
constexpr cstring() = default;
constexpr cstring(const cstring&) = default;
@ -542,9 +542,8 @@ inline constexpr bool is_enum_v = std::is_enum_v<T> && std::is_same_v<T, std::de
template <typename E, E V>
constexpr auto n() noexcept {
static_assert(is_enum_v<E>, "nameof::detail::n requires enum type.");
[[maybe_unused]] constexpr auto custom_name = customize::enum_name<E>(V);
if constexpr (custom_name.empty() && nameof_enum_supported<E>::value) {
if constexpr (nameof_enum_supported<E>::value) {
#if defined(__clang__) || defined(__GNUC__)
constexpr auto name = pretty_name({__PRETTY_FUNCTION__, sizeof(__PRETTY_FUNCTION__) - 2});
#elif defined(_MSC_VER)
@ -553,26 +552,43 @@ constexpr auto n() noexcept {
constexpr auto name = string_view{};
#endif
return cstring<name.size()>{name};
} else {
return cstring<0>{};
}
}
template <typename E, E V>
constexpr auto enum_name() noexcept {
static_assert(is_enum_v<E>, "nameof::detail::n requires enum type.");
[[maybe_unused]] constexpr auto custom_name = customize::enum_name<E>(V);
if constexpr (custom_name.empty()) {
return n<E, V>();
} else {
return cstring<custom_name.size()>{custom_name};
}
}
template <typename E, E V>
inline constexpr auto enum_name_v = n<E, V>();
template <typename E, E V>
constexpr bool valid() noexcept {
static_assert(is_enum_v<E>, "nameof::detail::is_valid requires enum type.");
return n<E, static_cast<E>(V)>().size() != 0;
}
template <typename E, auto V, typename = void>
struct is_valid : std::false_type {};
inline constexpr auto enum_name_v = enum_name<E, V>();
template <typename E, auto V>
struct is_valid<E, V, std::void_t<decltype(valid<E, static_cast<E>(V)>())>> : std::bool_constant<valid<E, static_cast<E>(V)>()> {};
constexpr bool is_valid() noexcept {
static_assert(is_enum_v<E>, "nameof::detail::is_valid requires enum type.");
#if defined(__clang__) && __clang_major__ >= 16
// https://reviews.llvm.org/D130058, https://reviews.llvm.org/D131307
constexpr E v = __builtin_bit_cast(E, V);
[[maybe_unused]] constexpr auto custom_name = customize::enum_name<E>(v);
if constexpr (custom_name.empty()) {
return n<E, v>().size() != 0;
} else {
return name.size() != 0;
}
#else
return enum_name<E, static_cast<E>(V)>().size() != 0;
#endif
}
template <typename E, int O, bool IsFlags, typename U = std::underlying_type_t<E>>
constexpr U ualue(std::size_t i) noexcept {
@ -653,7 +669,7 @@ constexpr std::size_t values_count(const bool (&valid)[N]) noexcept {
template <typename E, bool IsFlags, int Min, std::size_t... I>
constexpr auto values(std::index_sequence<I...>) noexcept {
static_assert(is_enum_v<E>, "nameof::detail::values requires enum type.");
constexpr bool valid[sizeof...(I)] = {is_valid<E, ualue<E, Min, IsFlags>(I)>::value...};
constexpr bool valid[sizeof...(I)] = {is_valid<E, ualue<E, Min, IsFlags>(I)>()...};
constexpr std::size_t count = values_count(valid);
if constexpr (count > 0) {
@ -974,10 +990,9 @@ constexpr auto get_member_name() noexcept {
template <auto V>
inline constexpr auto member_name_v = get_member_name<V>();
#else
template <auto V>
inline constexpr auto member_name_v = cstring<0>{string_view{}};
inline constexpr auto member_name_v = cstring<0>{};
#endif
} // namespace nameof::detail