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magic_enum.hpp
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magic_enum.hpp
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// __ __ _ ______ _____
// | \/ | (_) | ____| / ____|_ _
// | \ / | __ _ __ _ _ ___ | |__ _ __ _ _ _ __ ___ | | _| |_ _| |_
// | |\/| |/ _` |/ _` | |/ __| | __| | '_ \| | | | '_ ` _ \ | | |_ _|_ _|
// | | | | (_| | (_| | | (__ | |____| | | | |_| | | | | | | | |____|_| |_|
// |_| |_|\__,_|\__, |_|\___| |______|_| |_|\__,_|_| |_| |_| \_____|
// __/ | https://github.com/Neargye/magic_enum
// |___/ version 0.9.5
//
// Licensed under the MIT License <http://opensource.org/licenses/MIT>.
// SPDX-License-Identifier: MIT
// Copyright (c) 2019 - 2024 Daniil Goncharov <neargye@gmail.com>.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
#ifndef NEARGYE_MAGIC_ENUM_HPP
#define NEARGYE_MAGIC_ENUM_HPP
#define MAGIC_ENUM_VERSION_MAJOR 0
#define MAGIC_ENUM_VERSION_MINOR 9
#define MAGIC_ENUM_VERSION_PATCH 5
#include <array>
#include <cstddef>
#include <cstdint>
#include <functional>
#include <limits>
#include <type_traits>
#include <utility>
#if defined(MAGIC_ENUM_CONFIG_FILE)
# include MAGIC_ENUM_CONFIG_FILE
#endif
#if !defined(MAGIC_ENUM_USING_ALIAS_OPTIONAL)
# include <optional>
#endif
#if !defined(MAGIC_ENUM_USING_ALIAS_STRING)
# include <string>
#endif
#if !defined(MAGIC_ENUM_USING_ALIAS_STRING_VIEW)
# include <string_view>
#endif
#if defined(MAGIC_ENUM_NO_ASSERT)
# define MAGIC_ENUM_ASSERT(...) static_cast<void>(0)
#elif !defined(MAGIC_ENUM_ASSERT)
# include <cassert>
# define MAGIC_ENUM_ASSERT(...) assert((__VA_ARGS__))
#endif
#if defined(__clang__)
# pragma clang diagnostic push
# pragma clang diagnostic ignored "-Wunknown-warning-option"
# pragma clang diagnostic ignored "-Wenum-constexpr-conversion"
# pragma clang diagnostic ignored "-Wuseless-cast" // suppresses 'static_cast<char_type>('\0')' for char_type = char (common on Linux).
#elif defined(__GNUC__)
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wmaybe-uninitialized" // May be used uninitialized 'return {};'.
# pragma GCC diagnostic ignored "-Wuseless-cast" // suppresses 'static_cast<char_type>('\0')' for char_type = char (common on Linux).
#elif defined(_MSC_VER)
# pragma warning(push)
# pragma warning(disable : 26495) // Variable 'static_str<N>::chars_' is uninitialized.
# pragma warning(disable : 28020) // Arithmetic overflow: Using operator '-' on a 4 byte value and then casting the result to a 8 byte value.
# pragma warning(disable : 26451) // The expression '0<=_Param_(1)&&_Param_(1)<=1-1' is not true at this call.
# pragma warning(disable : 4514) // Unreferenced inline function has been removed.
#endif
// Checks magic_enum compiler compatibility.
#if defined(__clang__) && __clang_major__ >= 5 || defined(__GNUC__) && __GNUC__ >= 9 || defined(_MSC_VER) && _MSC_VER >= 1910 || defined(__RESHARPER__)
# undef MAGIC_ENUM_SUPPORTED
# define MAGIC_ENUM_SUPPORTED 1
#endif
// Checks magic_enum compiler aliases compatibility.
#if defined(__clang__) && __clang_major__ >= 5 || defined(__GNUC__) && __GNUC__ >= 9 || defined(_MSC_VER) && _MSC_VER >= 1920
# undef MAGIC_ENUM_SUPPORTED_ALIASES
# define MAGIC_ENUM_SUPPORTED_ALIASES 1
#endif
// Enum value must be greater or equals than MAGIC_ENUM_RANGE_MIN. By default MAGIC_ENUM_RANGE_MIN = -128.
// If need another min range for all enum types by default, redefine the macro MAGIC_ENUM_RANGE_MIN.
#if !defined(MAGIC_ENUM_RANGE_MIN)
# define MAGIC_ENUM_RANGE_MIN -128
#endif
// Enum value must be less or equals than MAGIC_ENUM_RANGE_MAX. By default MAGIC_ENUM_RANGE_MAX = 128.
// If need another max range for all enum types by default, redefine the macro MAGIC_ENUM_RANGE_MAX.
#if !defined(MAGIC_ENUM_RANGE_MAX)
# define MAGIC_ENUM_RANGE_MAX 127
#endif
// Improve ReSharper C++ intellisense performance with builtins, avoiding unnecessary template instantiations.
#if defined(__RESHARPER__)
# undef MAGIC_ENUM_GET_ENUM_NAME_BUILTIN
# undef MAGIC_ENUM_GET_TYPE_NAME_BUILTIN
# if __RESHARPER__ >= 20230100
# define MAGIC_ENUM_GET_ENUM_NAME_BUILTIN(V) __rscpp_enumerator_name(V)
# define MAGIC_ENUM_GET_TYPE_NAME_BUILTIN(T) __rscpp_type_name<T>()
# else
# define MAGIC_ENUM_GET_ENUM_NAME_BUILTIN(V) nullptr
# define MAGIC_ENUM_GET_TYPE_NAME_BUILTIN(T) nullptr
# endif
#endif
namespace magic_enum {
// If need another optional type, define the macro MAGIC_ENUM_USING_ALIAS_OPTIONAL.
#if defined(MAGIC_ENUM_USING_ALIAS_OPTIONAL)
MAGIC_ENUM_USING_ALIAS_OPTIONAL
#else
using std::optional;
#endif
// If need another string_view type, define the macro MAGIC_ENUM_USING_ALIAS_STRING_VIEW.
#if defined(MAGIC_ENUM_USING_ALIAS_STRING_VIEW)
MAGIC_ENUM_USING_ALIAS_STRING_VIEW
#else
using std::string_view;
#endif
// If need another string type, define the macro MAGIC_ENUM_USING_ALIAS_STRING.
#if defined(MAGIC_ENUM_USING_ALIAS_STRING)
MAGIC_ENUM_USING_ALIAS_STRING
#else
using std::string;
#endif
using char_type = string_view::value_type;
static_assert(std::is_same_v<string_view::value_type, string::value_type>, "magic_enum::customize requires same string_view::value_type and string::value_type");
static_assert([] {
if constexpr (std::is_same_v<char_type, wchar_t>) {
constexpr const char c[] = "abcdefghijklmnopqrstuvwxyz_ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789|";
constexpr const wchar_t wc[] = L"abcdefghijklmnopqrstuvwxyz_ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789|";
static_assert(std::size(c) == std::size(wc), "magic_enum::customize identifier characters are multichars in wchar_t.");
for (std::size_t i = 0; i < std::size(c); ++i) {
if (c[i] != wc[i]) {
return false;
}
}
}
return true;
} (), "magic_enum::customize wchar_t is not compatible with ASCII.");
namespace customize {
// Enum value must be in range [MAGIC_ENUM_RANGE_MIN, MAGIC_ENUM_RANGE_MAX]. By default MAGIC_ENUM_RANGE_MIN = -128, MAGIC_ENUM_RANGE_MAX = 128.
// If need another range for all enum types by default, redefine the macro MAGIC_ENUM_RANGE_MIN and MAGIC_ENUM_RANGE_MAX.
// If need another range for specific enum type, add specialization enum_range for necessary enum type.
template <typename E>
struct enum_range {
static_assert(std::is_enum_v<E>, "magic_enum::customize::enum_range requires enum type.");
static constexpr int min = MAGIC_ENUM_RANGE_MIN;
static constexpr int max = MAGIC_ENUM_RANGE_MAX;
static_assert(max > min, "magic_enum::customize::enum_range requires max > min.");
};
static_assert(MAGIC_ENUM_RANGE_MAX > MAGIC_ENUM_RANGE_MIN, "MAGIC_ENUM_RANGE_MAX must be greater than MAGIC_ENUM_RANGE_MIN.");
static_assert((MAGIC_ENUM_RANGE_MAX - MAGIC_ENUM_RANGE_MIN) < (std::numeric_limits<std::uint16_t>::max)(), "MAGIC_ENUM_RANGE must be less than UINT16_MAX.");
namespace detail {
enum class customize_tag {
default_tag,
invalid_tag,
custom_tag
};
} // namespace magic_enum::customize::detail
class customize_t : public std::pair<detail::customize_tag, string_view> {
public:
constexpr customize_t(string_view srt) : std::pair<detail::customize_tag, string_view>{detail::customize_tag::custom_tag, srt} {}
constexpr customize_t(const char_type* srt) : customize_t{string_view{srt}} {}
constexpr customize_t(detail::customize_tag tag) : std::pair<detail::customize_tag, string_view>{tag, string_view{}} {
MAGIC_ENUM_ASSERT(tag != detail::customize_tag::custom_tag);
}
};
// Default customize.
inline constexpr auto default_tag = customize_t{detail::customize_tag::default_tag};
// Invalid customize.
inline constexpr auto invalid_tag = customize_t{detail::customize_tag::invalid_tag};
// If need custom names for enum, add specialization enum_name for necessary enum type.
template <typename E>
constexpr customize_t enum_name(E) noexcept {
return default_tag;
}
// If need custom type name for enum, add specialization enum_type_name for necessary enum type.
template <typename E>
constexpr customize_t enum_type_name() noexcept {
return default_tag;
}
} // namespace magic_enum::customize
namespace detail {
template <typename T>
struct supported
#if defined(MAGIC_ENUM_SUPPORTED) && MAGIC_ENUM_SUPPORTED || defined(MAGIC_ENUM_NO_CHECK_SUPPORT)
: std::true_type {};
#else
: std::false_type {};
#endif
template <auto V, typename E = std::decay_t<decltype(V)>, std::enable_if_t<std::is_enum_v<E>, int> = 0>
using enum_constant = std::integral_constant<E, V>;
template <typename... T>
inline constexpr bool always_false_v = false;
template <typename T, typename = void>
struct has_is_flags : std::false_type {};
template <typename T>
struct has_is_flags<T, std::void_t<decltype(customize::enum_range<T>::is_flags)>> : std::bool_constant<std::is_same_v<bool, std::decay_t<decltype(customize::enum_range<T>::is_flags)>>> {};
template <typename T, typename = void>
struct range_min : std::integral_constant<int, MAGIC_ENUM_RANGE_MIN> {};
template <typename T>
struct range_min<T, std::void_t<decltype(customize::enum_range<T>::min)>> : std::integral_constant<decltype(customize::enum_range<T>::min), customize::enum_range<T>::min> {};
template <typename T, typename = void>
struct range_max : std::integral_constant<int, MAGIC_ENUM_RANGE_MAX> {};
template <typename T>
struct range_max<T, std::void_t<decltype(customize::enum_range<T>::max)>> : std::integral_constant<decltype(customize::enum_range<T>::max), customize::enum_range<T>::max> {};
struct str_view {
const char* str_ = nullptr;
std::size_t size_ = 0;
};
template <std::uint16_t N>
class static_str {
public:
constexpr explicit static_str(str_view str) noexcept : static_str{str.str_, std::make_integer_sequence<std::uint16_t, N>{}} {
MAGIC_ENUM_ASSERT(str.size_ == N);
}
constexpr explicit static_str(string_view str) noexcept : static_str{str.data(), std::make_integer_sequence<std::uint16_t, N>{}} {
MAGIC_ENUM_ASSERT(str.size() == N);
}
constexpr const char_type* data() const noexcept { return chars_; }
constexpr std::uint16_t size() const noexcept { return N; }
constexpr operator string_view() const noexcept { return {data(), size()}; }
private:
template <std::uint16_t... I>
constexpr static_str(const char* str, std::integer_sequence<std::uint16_t, I...>) noexcept : chars_{static_cast<char_type>(str[I])..., static_cast<char_type>('\0')} {}
template <std::uint16_t... I>
constexpr static_str(string_view str, std::integer_sequence<std::uint16_t, I...>) noexcept : chars_{str[I]..., static_cast<char_type>('\0')} {}
char_type chars_[static_cast<std::size_t>(N) + 1];
};
template <>
class static_str<0> {
public:
constexpr explicit static_str() = default;
constexpr explicit static_str(str_view) noexcept {}
constexpr explicit static_str(string_view) noexcept {}
constexpr const char_type* data() const noexcept { return nullptr; }
constexpr std::uint16_t size() const noexcept { return 0; }
constexpr operator string_view() const noexcept { return {}; }
};
template <typename Op = std::equal_to<>>
class case_insensitive {
static constexpr char_type to_lower(char_type c) noexcept {
return (c >= static_cast<char_type>('A') && c <= static_cast<char_type>('Z')) ? static_cast<char_type>(c + (static_cast<char_type>('a') - static_cast<char_type>('A'))) : c;
}
public:
template <typename L, typename R>
constexpr auto operator()(L lhs, R rhs) const noexcept -> std::enable_if_t<std::is_same_v<std::decay_t<L>, char_type> && std::is_same_v<std::decay_t<R>, char_type>, bool> {
return Op{}(to_lower(lhs), to_lower(rhs));
}
};
constexpr std::size_t find(string_view str, char_type c) noexcept {
#if defined(__clang__) && __clang_major__ < 9 && defined(__GLIBCXX__) || defined(_MSC_VER) && _MSC_VER < 1920 && !defined(__clang__)
// https://stackoverflow.com/questions/56484834/constexpr-stdstring-viewfind-last-of-doesnt-work-on-clang-8-with-libstdc
// https://developercommunity.visualstudio.com/content/problem/360432/vs20178-regression-c-failed-in-test.html
constexpr bool workaround = true;
#else
constexpr bool workaround = false;
#endif
if constexpr (workaround) {
for (std::size_t i = 0; i < str.size(); ++i) {
if (str[i] == c) {
return i;
}
}
return string_view::npos;
} else {
return str.find(c);
}
}
template <typename BinaryPredicate>
constexpr bool is_default_predicate() noexcept {
return std::is_same_v<std::decay_t<BinaryPredicate>, std::equal_to<string_view::value_type>> ||
std::is_same_v<std::decay_t<BinaryPredicate>, std::equal_to<>>;
}
template <typename BinaryPredicate>
constexpr bool is_nothrow_invocable() {
return is_default_predicate<BinaryPredicate>() ||
std::is_nothrow_invocable_r_v<bool, BinaryPredicate, char_type, char_type>;
}
template <typename BinaryPredicate>
constexpr bool cmp_equal(string_view lhs, string_view rhs, [[maybe_unused]] BinaryPredicate&& p) noexcept(is_nothrow_invocable<BinaryPredicate>()) {
#if defined(_MSC_VER) && _MSC_VER < 1920 && !defined(__clang__)
// https://developercommunity.visualstudio.com/content/problem/360432/vs20178-regression-c-failed-in-test.html
// https://developercommunity.visualstudio.com/content/problem/232218/c-constexpr-string-view.html
constexpr bool workaround = true;
#else
constexpr bool workaround = false;
#endif
if constexpr (!is_default_predicate<BinaryPredicate>() || workaround) {
if (lhs.size() != rhs.size()) {
return false;
}
const auto size = lhs.size();
for (std::size_t i = 0; i < size; ++i) {
if (!p(lhs[i], rhs[i])) {
return false;
}
}
return true;
} else {
return lhs == rhs;
}
}
template <typename L, typename R>
constexpr bool cmp_less(L lhs, R rhs) noexcept {
static_assert(std::is_integral_v<L> && std::is_integral_v<R>, "magic_enum::detail::cmp_less requires integral type.");
if constexpr (std::is_signed_v<L> == std::is_signed_v<R>) {
// If same signedness (both signed or both unsigned).
return lhs < rhs;
} else if constexpr (std::is_same_v<L, bool>) { // bool special case
return static_cast<R>(lhs) < rhs;
} else if constexpr (std::is_same_v<R, bool>) { // bool special case
return lhs < static_cast<L>(rhs);
} else if constexpr (std::is_signed_v<R>) {
// If 'right' is negative, then result is 'false', otherwise cast & compare.
return rhs > 0 && lhs < static_cast<std::make_unsigned_t<R>>(rhs);
} else {
// If 'left' is negative, then result is 'true', otherwise cast & compare.
return lhs < 0 || static_cast<std::make_unsigned_t<L>>(lhs) < rhs;
}
}
template <typename I>
constexpr I log2(I value) noexcept {
static_assert(std::is_integral_v<I>, "magic_enum::detail::log2 requires integral type.");
if constexpr (std::is_same_v<I, bool>) { // bool special case
return MAGIC_ENUM_ASSERT(false), value;
} else {
auto ret = I{0};
for (; value > I{1}; value >>= I{1}, ++ret) {}
return ret;
}
}
#if defined(__cpp_lib_array_constexpr) && __cpp_lib_array_constexpr >= 201603L
# define MAGIC_ENUM_ARRAY_CONSTEXPR 1
#else
template <typename T, std::size_t N, std::size_t... I>
constexpr std::array<std::remove_cv_t<T>, N> to_array(T (&a)[N], std::index_sequence<I...>) noexcept {
return {{a[I]...}};
}
#endif
template <typename T>
inline constexpr bool is_enum_v = std::is_enum_v<T> && std::is_same_v<T, std::decay_t<T>>;
template <typename E>
constexpr auto n() noexcept {
static_assert(is_enum_v<E>, "magic_enum::detail::n requires enum type.");
if constexpr (supported<E>::value) {
#if defined(MAGIC_ENUM_GET_TYPE_NAME_BUILTIN)
constexpr auto name_ptr = MAGIC_ENUM_GET_TYPE_NAME_BUILTIN(E);
constexpr auto name = name_ptr ? str_view{name_ptr, std::char_traits<char>::length(name_ptr)} : str_view{};
#elif defined(__clang__)
str_view name;
if constexpr (sizeof(__PRETTY_FUNCTION__) == sizeof(__FUNCTION__)) {
static_assert(always_false_v<E>, "magic_enum::detail::n requires __PRETTY_FUNCTION__.");
return str_view{};
} else {
name.size_ = sizeof(__PRETTY_FUNCTION__) - 36;
name.str_ = __PRETTY_FUNCTION__ + 34;
}
#elif defined(__GNUC__)
auto name = str_view{__PRETTY_FUNCTION__, sizeof(__PRETTY_FUNCTION__) - 1};
if constexpr (sizeof(__PRETTY_FUNCTION__) == sizeof(__FUNCTION__)) {
static_assert(always_false_v<E>, "magic_enum::detail::n requires __PRETTY_FUNCTION__.");
return str_view{};
} else if (name.str_[name.size_ - 1] == ']') {
name.size_ -= 50;
name.str_ += 49;
} else {
name.size_ -= 40;
name.str_ += 37;
}
#elif defined(_MSC_VER)
// CLI/C++ workaround (see https://github.com/Neargye/magic_enum/issues/284).
str_view name;
name.str_ = __FUNCSIG__;
name.str_ += 40;
name.size_ += sizeof(__FUNCSIG__) - 57;
#else
auto name = str_view{};
#endif
std::size_t p = 0;
for (std::size_t i = name.size_; i > 0; --i) {
if (name.str_[i] == ':') {
p = i + 1;
break;
}
}
if (p > 0) {
name.size_ -= p;
name.str_ += p;
}
return name;
} else {
return str_view{}; // Unsupported compiler or Invalid customize.
}
}
template <typename E>
constexpr auto type_name() noexcept {
[[maybe_unused]] constexpr auto custom = customize::enum_type_name<E>();
static_assert(std::is_same_v<std::decay_t<decltype(custom)>, customize::customize_t>, "magic_enum::customize requires customize_t type.");
if constexpr (custom.first == customize::detail::customize_tag::custom_tag) {
constexpr auto name = custom.second;
static_assert(!name.empty(), "magic_enum::customize requires not empty string.");
return static_str<name.size()>{name};
} else if constexpr (custom.first == customize::detail::customize_tag::invalid_tag) {
return static_str<0>{};
} else if constexpr (custom.first == customize::detail::customize_tag::default_tag) {
constexpr auto name = n<E>();
return static_str<name.size_>{name};
} else {
static_assert(always_false_v<E>, "magic_enum::customize invalid.");
}
}
template <typename E>
inline constexpr auto type_name_v = type_name<E>();
template <auto V>
constexpr auto n() noexcept {
static_assert(is_enum_v<decltype(V)>, "magic_enum::detail::n requires enum type.");
if constexpr (supported<decltype(V)>::value) {
#if defined(MAGIC_ENUM_GET_ENUM_NAME_BUILTIN)
constexpr auto name_ptr = MAGIC_ENUM_GET_ENUM_NAME_BUILTIN(V);
auto name = name_ptr ? str_view{name_ptr, std::char_traits<char>::length(name_ptr)} : str_view{};
#elif defined(__clang__)
str_view name;
if constexpr (sizeof(__PRETTY_FUNCTION__) == sizeof(__FUNCTION__)) {
static_assert(always_false_v<decltype(V)>, "magic_enum::detail::n requires __PRETTY_FUNCTION__.");
return str_view{};
} else {
name.size_ = sizeof(__PRETTY_FUNCTION__) - 36;
name.str_ = __PRETTY_FUNCTION__ + 34;
}
if (name.size_ > 22 && name.str_[0] == '(' && name.str_[1] == 'a' && name.str_[10] == ' ' && name.str_[22] == ':') {
name.size_ -= 23;
name.str_ += 23;
}
if (name.str_[0] == '(' || name.str_[0] == '-' || (name.str_[0] >= '0' && name.str_[0] <= '9')) {
name = str_view{};
}
#elif defined(__GNUC__)
auto name = str_view{__PRETTY_FUNCTION__, sizeof(__PRETTY_FUNCTION__) - 1};
if constexpr (sizeof(__PRETTY_FUNCTION__) == sizeof(__FUNCTION__)) {
static_assert(always_false_v<decltype(V)>, "magic_enum::detail::n requires __PRETTY_FUNCTION__.");
return str_view{};
} else if (name.str_[name.size_ - 1] == ']') {
name.size_ -= 55;
name.str_ += 54;
} else {
name.size_ -= 40;
name.str_ += 37;
}
if (name.str_[0] == '(') {
name = str_view{};
}
#elif defined(_MSC_VER)
str_view name;
if ((__FUNCSIG__[5] == '_' && __FUNCSIG__[35] != '(') || (__FUNCSIG__[5] == 'c' && __FUNCSIG__[41] != '(')) {
// CLI/C++ workaround (see https://github.com/Neargye/magic_enum/issues/284).
name.str_ = __FUNCSIG__;
name.str_ += 35;
name.size_ = sizeof(__FUNCSIG__) - 52;
}
#else
auto name = str_view{};
#endif
std::size_t p = 0;
for (std::size_t i = name.size_; i > 0; --i) {
if (name.str_[i] == ':') {
p = i + 1;
break;
}
}
if (p > 0) {
name.size_ -= p;
name.str_ += p;
}
return name;
} else {
return str_view{}; // Unsupported compiler or Invalid customize.
}
}
#if defined(_MSC_VER) && !defined(__clang__) && _MSC_VER < 1920
# define MAGIC_ENUM_VS_2017_WORKAROUND 1
#endif
#if defined(MAGIC_ENUM_VS_2017_WORKAROUND)
template <typename E, E V>
constexpr auto n() noexcept {
static_assert(is_enum_v<E>, "magic_enum::detail::n requires enum type.");
# if defined(MAGIC_ENUM_GET_ENUM_NAME_BUILTIN)
constexpr auto name_ptr = MAGIC_ENUM_GET_ENUM_NAME_BUILTIN(V);
auto name = name_ptr ? str_view{name_ptr, std::char_traits<char>::length(name_ptr)} : str_view{};
# else
// CLI/C++ workaround (see https://github.com/Neargye/magic_enum/issues/284).
str_view name;
name.str_ = __FUNCSIG__;
name.size_ = sizeof(__FUNCSIG__) - 17;
std::size_t p = 0;
for (std::size_t i = name.size_; i > 0; --i) {
if (name.str_[i] == ',' || name.str_[i] == ':') {
p = i + 1;
break;
}
}
if (p > 0) {
name.size_ -= p;
name.str_ += p;
}
if (name.str_[0] == '(' || name.str_[0] == '-' || (name.str_[0] >= '0' && name.str_[0] <= '9')) {
name = str_view{};
}
return name;
# endif
}
#endif
template <typename E, E V>
constexpr auto enum_name() noexcept {
[[maybe_unused]] constexpr auto custom = customize::enum_name<E>(V);
static_assert(std::is_same_v<std::decay_t<decltype(custom)>, customize::customize_t>, "magic_enum::customize requires customize_t type.");
if constexpr (custom.first == customize::detail::customize_tag::custom_tag) {
constexpr auto name = custom.second;
static_assert(!name.empty(), "magic_enum::customize requires not empty string.");
return static_str<name.size()>{name};
} else if constexpr (custom.first == customize::detail::customize_tag::invalid_tag) {
return static_str<0>{};
} else if constexpr (custom.first == customize::detail::customize_tag::default_tag) {
#if defined(MAGIC_ENUM_VS_2017_WORKAROUND)
constexpr auto name = n<E, V>();
#else
constexpr auto name = n<V>();
#endif
return static_str<name.size_>{name};
} else {
static_assert(always_false_v<E>, "magic_enum::customize invalid.");
}
}
template <typename E, E V>
inline constexpr auto enum_name_v = enum_name<E, V>();
template <typename E, auto V>
constexpr bool is_valid() noexcept {
#if defined(__clang__) && __clang_major__ >= 16
// https://reviews.llvm.org/D130058, https://reviews.llvm.org/D131307
constexpr E v = __builtin_bit_cast(E, V);
#else
constexpr E v = static_cast<E>(V);
#endif
[[maybe_unused]] constexpr auto custom = customize::enum_name<E>(v);
static_assert(std::is_same_v<std::decay_t<decltype(custom)>, customize::customize_t>, "magic_enum::customize requires customize_t type.");
if constexpr (custom.first == customize::detail::customize_tag::custom_tag) {
constexpr auto name = custom.second;
static_assert(!name.empty(), "magic_enum::customize requires not empty string.");
return name.size() != 0;
} else if constexpr (custom.first == customize::detail::customize_tag::default_tag) {
#if defined(MAGIC_ENUM_VS_2017_WORKAROUND)
return n<E, v>().size_ != 0;
#else
return n<v>().size_ != 0;
#endif
} else {
return false;
}
}
enum class enum_subtype {
common,
flags
};
template <typename E, int O, enum_subtype S, typename U = std::underlying_type_t<E>>
constexpr U ualue(std::size_t i) noexcept {
if constexpr (std::is_same_v<U, bool>) { // bool special case
static_assert(O == 0, "magic_enum::detail::ualue requires valid offset.");
return static_cast<U>(i);
} else if constexpr (S == enum_subtype::flags) {
return static_cast<U>(U{1} << static_cast<U>(static_cast<int>(i) + O));
} else {
return static_cast<U>(static_cast<int>(i) + O);
}
}
template <typename E, int O, enum_subtype S, typename U = std::underlying_type_t<E>>
constexpr E value(std::size_t i) noexcept {
return static_cast<E>(ualue<E, O, S>(i));
}
template <typename E, enum_subtype S, typename U = std::underlying_type_t<E>>
constexpr int reflected_min() noexcept {
if constexpr (S == enum_subtype::flags) {
return 0;
} else {
constexpr auto lhs = range_min<E>::value;
constexpr auto rhs = (std::numeric_limits<U>::min)();
if constexpr (cmp_less(rhs, lhs)) {
return lhs;
} else {
return rhs;
}
}
}
template <typename E, enum_subtype S, typename U = std::underlying_type_t<E>>
constexpr int reflected_max() noexcept {
if constexpr (S == enum_subtype::flags) {
return std::numeric_limits<U>::digits - 1;
} else {
constexpr auto lhs = range_max<E>::value;
constexpr auto rhs = (std::numeric_limits<U>::max)();
if constexpr (cmp_less(lhs, rhs)) {
return lhs;
} else {
return rhs;
}
}
}
#define MAGIC_ENUM_FOR_EACH_256(T) \
T( 0)T( 1)T( 2)T( 3)T( 4)T( 5)T( 6)T( 7)T( 8)T( 9)T( 10)T( 11)T( 12)T( 13)T( 14)T( 15)T( 16)T( 17)T( 18)T( 19)T( 20)T( 21)T( 22)T( 23)T( 24)T( 25)T( 26)T( 27)T( 28)T( 29)T( 30)T( 31) \
T( 32)T( 33)T( 34)T( 35)T( 36)T( 37)T( 38)T( 39)T( 40)T( 41)T( 42)T( 43)T( 44)T( 45)T( 46)T( 47)T( 48)T( 49)T( 50)T( 51)T( 52)T( 53)T( 54)T( 55)T( 56)T( 57)T( 58)T( 59)T( 60)T( 61)T( 62)T( 63) \
T( 64)T( 65)T( 66)T( 67)T( 68)T( 69)T( 70)T( 71)T( 72)T( 73)T( 74)T( 75)T( 76)T( 77)T( 78)T( 79)T( 80)T( 81)T( 82)T( 83)T( 84)T( 85)T( 86)T( 87)T( 88)T( 89)T( 90)T( 91)T( 92)T( 93)T( 94)T( 95) \
T( 96)T( 97)T( 98)T( 99)T(100)T(101)T(102)T(103)T(104)T(105)T(106)T(107)T(108)T(109)T(110)T(111)T(112)T(113)T(114)T(115)T(116)T(117)T(118)T(119)T(120)T(121)T(122)T(123)T(124)T(125)T(126)T(127) \
T(128)T(129)T(130)T(131)T(132)T(133)T(134)T(135)T(136)T(137)T(138)T(139)T(140)T(141)T(142)T(143)T(144)T(145)T(146)T(147)T(148)T(149)T(150)T(151)T(152)T(153)T(154)T(155)T(156)T(157)T(158)T(159) \
T(160)T(161)T(162)T(163)T(164)T(165)T(166)T(167)T(168)T(169)T(170)T(171)T(172)T(173)T(174)T(175)T(176)T(177)T(178)T(179)T(180)T(181)T(182)T(183)T(184)T(185)T(186)T(187)T(188)T(189)T(190)T(191) \
T(192)T(193)T(194)T(195)T(196)T(197)T(198)T(199)T(200)T(201)T(202)T(203)T(204)T(205)T(206)T(207)T(208)T(209)T(210)T(211)T(212)T(213)T(214)T(215)T(216)T(217)T(218)T(219)T(220)T(221)T(222)T(223) \
T(224)T(225)T(226)T(227)T(228)T(229)T(230)T(231)T(232)T(233)T(234)T(235)T(236)T(237)T(238)T(239)T(240)T(241)T(242)T(243)T(244)T(245)T(246)T(247)T(248)T(249)T(250)T(251)T(252)T(253)T(254)T(255)
template <typename E, enum_subtype S, std::size_t Size, int Min, std::size_t I>
constexpr void valid_count(bool* valid, std::size_t& count) noexcept {
#define MAGIC_ENUM_V(O) \
if constexpr ((I + O) < Size) { \
if constexpr (is_valid<E, ualue<E, Min, S>(I + O)>()) { \
valid[I + O] = true; \
++count; \
} \
}
MAGIC_ENUM_FOR_EACH_256(MAGIC_ENUM_V)
if constexpr ((I + 256) < Size) {
valid_count<E, S, Size, Min, I + 256>(valid, count);
}
#undef MAGIC_ENUM_V
}
template <std::size_t N>
struct valid_count_t {
std::size_t count = 0;
bool valid[N] = {};
};
template <typename E, enum_subtype S, std::size_t Size, int Min>
constexpr auto valid_count() noexcept {
valid_count_t<Size> vc;
valid_count<E, S, Size, Min, 0>(vc.valid, vc.count);
return vc;
}
template <typename E, enum_subtype S, std::size_t Size, int Min>
constexpr auto values() noexcept {
constexpr auto vc = valid_count<E, S, Size, Min>();
if constexpr (vc.count > 0) {
#if defined(MAGIC_ENUM_ARRAY_CONSTEXPR)
std::array<E, vc.count> values = {};
#else
E values[vc.count] = {};
#endif
for (std::size_t i = 0, v = 0; v < vc.count; ++i) {
if (vc.valid[i]) {
values[v++] = value<E, Min, S>(i);
}
}
#if defined(MAGIC_ENUM_ARRAY_CONSTEXPR)
return values;
#else
return to_array(values, std::make_index_sequence<vc.count>{});
#endif
} else {
return std::array<E, 0>{};
}
}
template <typename E, enum_subtype S, typename U = std::underlying_type_t<E>>
constexpr auto values() noexcept {
constexpr auto min = reflected_min<E, S>();
constexpr auto max = reflected_max<E, S>();
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.");
return values<E, S, range_size, min>();
}
template <typename E, typename U = std::underlying_type_t<E>>
constexpr enum_subtype subtype(std::true_type) noexcept {
if constexpr (std::is_same_v<U, bool>) { // bool special case
return enum_subtype::common;
} else if constexpr (has_is_flags<E>::value) {
return customize::enum_range<E>::is_flags ? enum_subtype::flags : enum_subtype::common;
} else {
#if defined(MAGIC_ENUM_AUTO_IS_FLAGS)
constexpr auto flags_values = values<E, enum_subtype::flags>();
constexpr auto default_values = values<E, enum_subtype::common>();
if (flags_values.size() == 0 || default_values.size() > flags_values.size()) {
return enum_subtype::common;
}
for (std::size_t i = 0; i < default_values.size(); ++i) {
const auto v = static_cast<U>(default_values[i]);
if (v != 0 && (v & (v - 1)) != 0) {
return enum_subtype::common;
}
}
return enum_subtype::flags;
#else
return enum_subtype::common;
#endif
}
}
template <typename T>
constexpr enum_subtype subtype(std::false_type) noexcept {
// For non-enum type return default common subtype.
return enum_subtype::common;
}
template <typename E, typename D = std::decay_t<E>>
inline constexpr auto subtype_v = subtype<D>(std::is_enum<D>{});
template <typename E, enum_subtype S>
inline constexpr auto values_v = values<E, S>();
template <typename E, enum_subtype S, typename D = std::decay_t<E>>
using values_t = decltype((values_v<D, S>));
template <typename E, enum_subtype S>
inline constexpr auto count_v = values_v<E, S>.size();
template <typename E, enum_subtype S, typename U = std::underlying_type_t<E>>
inline constexpr auto min_v = (count_v<E, S> > 0) ? static_cast<U>(values_v<E, S>.front()) : U{0};
template <typename E, enum_subtype S, typename U = std::underlying_type_t<E>>
inline constexpr auto max_v = (count_v<E, S> > 0) ? static_cast<U>(values_v<E, S>.back()) : U{0};
template <typename E, enum_subtype S, std::size_t... I>
constexpr auto names(std::index_sequence<I...>) noexcept {
constexpr auto names = std::array<string_view, sizeof...(I)>{{enum_name_v<E, values_v<E, S>[I]>...}};
return names;
}
template <typename E, enum_subtype S>
inline constexpr auto names_v = names<E, S>(std::make_index_sequence<count_v<E, S>>{});
template <typename E, enum_subtype S, typename D = std::decay_t<E>>
using names_t = decltype((names_v<D, S>));
template <typename E, enum_subtype S, std::size_t... I>
constexpr auto entries(std::index_sequence<I...>) noexcept {
constexpr auto entries = std::array<std::pair<E, string_view>, sizeof...(I)>{{{values_v<E, S>[I], enum_name_v<E, values_v<E, S>[I]>}...}};
return entries;
}
template <typename E, enum_subtype S>
inline constexpr auto entries_v = entries<E, S>(std::make_index_sequence<count_v<E, S>>{});
template <typename E, enum_subtype S, typename D = std::decay_t<E>>
using entries_t = decltype((entries_v<D, S>));
template <typename E, enum_subtype S, typename U = std::underlying_type_t<E>>
constexpr bool is_sparse() noexcept {
if constexpr (count_v<E, S> == 0) {
return false;
} else if constexpr (std::is_same_v<U, bool>) { // bool special case
return false;
} else {
constexpr auto max = (S == enum_subtype::flags) ? log2(max_v<E, S>) : max_v<E, S>;
constexpr auto min = (S == enum_subtype::flags) ? log2(min_v<E, S>) : min_v<E, S>;
constexpr auto range_size = max - min + 1;
return range_size != count_v<E, S>;
}
}
template <typename E, enum_subtype S = subtype_v<E>>
inline constexpr bool is_sparse_v = is_sparse<E, S>();
template <typename E, enum_subtype S>
struct is_reflected
#if defined(MAGIC_ENUM_NO_CHECK_REFLECTED_ENUM)
: std::true_type {};
#else
: std::bool_constant<std::is_enum_v<E> && (count_v<E, S> != 0)> {};
#endif
template <typename E, enum_subtype S>
inline constexpr bool is_reflected_v = is_reflected<std::decay_t<E>, S>{};
template <bool, typename R>
struct enable_if_enum {};
template <typename R>
struct enable_if_enum<true, R> {
using type = R;
static_assert(supported<R>::value, "magic_enum unsupported compiler (https://github.com/Neargye/magic_enum#compiler-compatibility).");
};
template <typename T, typename R, typename BinaryPredicate = std::equal_to<>, typename D = std::decay_t<T>>
using enable_if_t = typename enable_if_enum<std::is_enum_v<D> && std::is_invocable_r_v<bool, BinaryPredicate, char_type, char_type>, R>::type;
template <typename T, std::enable_if_t<std::is_enum_v<std::decay_t<T>>, int> = 0>
using enum_concept = T;
template <typename T, bool = std::is_enum_v<T>>
struct is_scoped_enum : std::false_type {};
template <typename T>
struct is_scoped_enum<T, true> : std::bool_constant<!std::is_convertible_v<T, std::underlying_type_t<T>>> {};
template <typename T, bool = std::is_enum_v<T>>
struct is_unscoped_enum : std::false_type {};
template <typename T>
struct is_unscoped_enum<T, true> : std::bool_constant<std::is_convertible_v<T, std::underlying_type_t<T>>> {};
template <typename T, bool = std::is_enum_v<std::decay_t<T>>>
struct underlying_type {};
template <typename T>
struct underlying_type<T, true> : std::underlying_type<std::decay_t<T>> {};
#if defined(MAGIC_ENUM_ENABLE_HASH) || defined(MAGIC_ENUM_ENABLE_HASH_SWITCH)
template <typename Value, typename = void>
struct constexpr_hash_t;
template <typename Value>
struct constexpr_hash_t<Value, std::enable_if_t<is_enum_v<Value>>> {
constexpr auto operator()(Value value) const noexcept {
using U = typename underlying_type<Value>::type;
if constexpr (std::is_same_v<U, bool>) { // bool special case
return static_cast<std::size_t>(value);
} else {
return static_cast<U>(value);
}
}
using secondary_hash = constexpr_hash_t;
};
template <typename Value>
struct constexpr_hash_t<Value, std::enable_if_t<std::is_same_v<Value, string_view>>> {
static constexpr std::uint32_t crc_table[256] {
0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L, 0x706af48fL, 0xe963a535L, 0x9e6495a3L,
0x0edb8832L, 0x79dcb8a4L, 0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L, 0x90bf1d91L,
0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL, 0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L,
0x136c9856L, 0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L, 0xfa0f3d63L, 0x8d080df5L,
0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L, 0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L, 0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L,
0x26d930acL, 0x51de003aL, 0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L, 0xb8bda50fL,
0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L, 0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL,
0x76dc4190L, 0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL, 0x9fbfe4a5L, 0xe8b8d433L,
0x7807c9a2L, 0x0f00f934L, 0x9609a88eL, 0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL, 0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L,
0x65b0d9c6L, 0x12b7e950L, 0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L, 0xfbd44c65L,
0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L, 0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL,
0x4369e96aL, 0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L, 0xaa0a4c5fL, 0xdd0d7cc9L,
0x5005713cL, 0x270241aaL, 0xbe0b1010L, 0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L, 0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL,
0xedb88320L, 0x9abfb3b6L, 0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L, 0x73dc1683L,
0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L, 0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L,
0xf00f9344L, 0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL, 0x196c3671L, 0x6e6b06e7L,
0xfed41b76L, 0x89d32be0L, 0x10da7a5aL, 0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L, 0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL,
0xd80d2bdaL, 0xaf0a1b4cL, 0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL, 0x4669be79L,
0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L, 0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL,
0xc5ba3bbeL, 0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L, 0x2cd99e8bL, 0x5bdeae1dL,
0x9b64c2b0L, 0xec63f226L, 0x756aa39cL, 0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL, 0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L,
0x86d3d2d4L, 0xf1d4e242L, 0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L, 0x18b74777L,
0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL, 0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L,
0xa00ae278L, 0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L, 0x4969474dL, 0x3e6e77dbL,
0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L, 0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L, 0xcdd70693L, 0x54de5729L, 0x23d967bfL,
0xb3667a2eL, 0xc4614ab8L, 0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL, 0x2d02ef8dL
};
constexpr std::uint32_t operator()(string_view value) const noexcept {
auto crc = static_cast<std::uint32_t>(0xffffffffL);
for (const auto c : value) {
crc = (crc >> 8) ^ crc_table[(crc ^ static_cast<std::uint32_t>(c)) & 0xff];
}
return crc ^ 0xffffffffL;
}
struct secondary_hash {
constexpr std::uint32_t operator()(string_view value) const noexcept {
auto acc = static_cast<std::uint64_t>(2166136261ULL);
for (const auto c : value) {
acc = ((acc ^ static_cast<std::uint64_t>(c)) * static_cast<std::uint64_t>(16777619ULL)) & (std::numeric_limits<std::uint32_t>::max)();
}
return static_cast<std::uint32_t>(acc);
}
};
};
template <typename Hash>
inline constexpr Hash hash_v{};
template <auto* GlobValues, typename Hash>
constexpr auto calculate_cases(std::size_t Page) noexcept {
constexpr std::array values = *GlobValues;
constexpr std::size_t size = values.size();
using switch_t = std::invoke_result_t<Hash, typename decltype(values)::value_type>;
static_assert(std::is_integral_v<switch_t> && !std::is_same_v<switch_t, bool>);
const std::size_t values_to = (std::min)(static_cast<std::size_t>(256), size - Page);