nameof_module/include/nameof.hpp

//  _   _                             __    _____
// | \ | |                           / _|  / ____|_     _
// |  \| | __ _ _ __ ___   ___  ___ | |_  | |   _| |_ _| |_
// | . ` |/ _` | '_ ` _ \ / _ \/ _ \|  _| | |  |_   _|_   _|
// | |\  | (_| | | | | | |  __/ (_) | |   | |____|_|   |_|
// |_| \_|\__,_|_| |_| |_|\___|\___/|_|    \_____|
// https://github.com/Neargye/nameof
// version 0.10.4
//
// Licensed under the MIT License <http://opensource.org/licenses/MIT>.
// SPDX-License-Identifier: MIT
// Copyright (c) 2016 - 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_NAMEOF_HPP
#define NEARGYE_NAMEOF_HPP

#include "nameof_macro.hpp"

#ifdef NAMEOF_MODULE

#define NAMEOF_EXPORT export

#define NAMEOF_EXPORT_BEGIN export {
#define NAMEOF_EXPORT_END }

#else

#define NAMEOF_EXPORT
#define NAMEOF_EXPORT_BEGIN
#define NAMEOF_EXPORT_END

#endif

#include <array>
#include <cassert>
#include <cstddef>
#include <cstdint>
#include <iosfwd>
#include <iterator>
#include <limits>
#include <type_traits>
#include <utility>

#if !defined(NAMEOF_USING_ALIAS_STRING)
#include <string>
#endif
#if !defined(NAMEOF_USING_ALIAS_STRING_VIEW)
#include <string_view>
#endif

#if __has_include(<cxxabi.h>)
#include <cxxabi.h>

#include <cstdlib>
#endif

#if defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunknown-warning-option"
#pragma clang diagnostic ignored "-Wenum-constexpr-conversion"
#elif defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wstringop-overflow"  // Missing terminating nul 'enum_name_v'.
#elif defined(_MSC_VER)
#pragma warning(push)
#pragma warning(disable : 26495)  // Variable 'cstring<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

namespace nameof {

NAMEOF_EXPORT_BEGIN

// If need another string_view type, define the macro NAMEOF_USING_ALIAS_STRING_VIEW.
#if defined(NAMEOF_USING_ALIAS_STRING_VIEW)
NAMEOF_USING_ALIAS_STRING_VIEW
#else
using std::string_view;
#endif

// If need another string type, define the macro NAMEOF_USING_ALIAS_STRING.
#if defined(NAMEOF_USING_ALIAS_STRING)
NAMEOF_USING_ALIAS_STRING
#else
using std::string;
#endif

namespace customize {

// Enum value must be in range [NAMEOF_ENUM_RANGE_MIN, NAMEOF_ENUM_RANGE_MAX]. By default NAMEOF_ENUM_RANGE_MIN = -128,
// NAMEOF_ENUM_RANGE_MAX = 128. If you need another range for all enum types by default, redefine the macro NAMEOF_ENUM_RANGE_MIN and
// NAMEOF_ENUM_RANGE_MAX. If you 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>, "nameof::customize::enum_range requires enum type.");
  inline static constexpr int min = NAMEOF_ENUM_RANGE_MIN;
  inline static constexpr int max = NAMEOF_ENUM_RANGE_MAX;
  static_assert(max > min, "nameof::customize::enum_range requires max > min.");
};

static_assert(NAMEOF_ENUM_RANGE_MIN <= 0, "NAMEOF_ENUM_RANGE_MIN must be less or equals than 0.");
static_assert(NAMEOF_ENUM_RANGE_MIN > (std::numeric_limits<std::int16_t>::min)(), "NAMEOF_ENUM_RANGE_MIN must be greater than INT16_MIN.");

static_assert(NAMEOF_ENUM_RANGE_MAX > 0, "NAMEOF_ENUM_RANGE_MAX must be greater than 0.");
static_assert(NAMEOF_ENUM_RANGE_MAX < (std::numeric_limits<std::int16_t>::max)(), "NAMEOF_ENUM_RANGE_MAX must be less than INT16_MAX.");

static_assert(NAMEOF_ENUM_RANGE_MAX > NAMEOF_ENUM_RANGE_MIN, "NAMEOF_ENUM_RANGE_MAX must be greater than NAMEOF_ENUM_RANGE_MIN.");

// If you need custom names for enum, add specialization enum_name for necessary enum type.
template <typename E>
constexpr string_view enum_name(E) noexcept {
  static_assert(std::is_enum_v<E>, "nameof::customize::enum_name requires enum type.");
  return {};
}

// If you need custom name for type, add specialization type_name for necessary type.
template <typename T>
constexpr string_view type_name() noexcept {
  return {};
}

// If you need custom name for member, add specialization member_name for necessary type.
template <auto V>
constexpr string_view member_name() noexcept {
  return {};
}

// If you need custom name for a pointer, add specialization pointer_name for necessary type.
template <auto V>
constexpr string_view pointer_name() noexcept {
  return {};
}

}  // namespace customize

template <std::uint16_t N>
class [[nodiscard]] cstring {
 public:
  using value_type = const char;
  using size_type = std::uint16_t;
  using difference_type = std::ptrdiff_t;
  using pointer = const char*;
  using const_pointer = const char*;
  using reference = const char&;
  using const_reference = const char&;

  using iterator = const char*;
  using const_iterator = const char*;

  using reverse_iterator = std::reverse_iterator<iterator>;
  using const_reverse_iterator = std::reverse_iterator<const_iterator>;

  constexpr explicit cstring(string_view str) noexcept : cstring{str, std::make_integer_sequence<std::uint16_t, N>{}} {
    assert(str.size() > 0 && str.size() == N);
  }

  constexpr cstring() = delete;

  constexpr cstring(const cstring&) = default;

  constexpr cstring(cstring&&) = default;

  ~cstring() = default;

  cstring& operator=(const cstring&) = default;

  cstring& operator=(cstring&&) = default;

  [[nodiscard]] constexpr const_pointer data() const noexcept {
    return chars_;
  }

  [[nodiscard]] constexpr size_type size() const noexcept {
    return N;
  }

  [[nodiscard]] constexpr const_iterator begin() const noexcept {
    return data();
  }

  [[nodiscard]] constexpr const_iterator end() const noexcept {
    return data() + size();
  }

  [[nodiscard]] constexpr const_iterator cbegin() const noexcept {
    return begin();
  }

  [[nodiscard]] constexpr const_iterator cend() const noexcept {
    return end();
  }

  [[nodiscard]] constexpr const_reverse_iterator rbegin() const noexcept {
    return end();
  }

  [[nodiscard]] constexpr const_reverse_iterator rend() const noexcept {
    return begin();
  }

  [[nodiscard]] constexpr const_reverse_iterator crbegin() const noexcept {
    return rbegin();
  }

  [[nodiscard]] constexpr const_reverse_iterator crend() const noexcept {
    return rend();
  }

  [[nodiscard]] constexpr const_reference operator[](size_type i) const noexcept {
    return assert(i < size()), chars_[i];
  }

  [[nodiscard]] constexpr const_reference front() const noexcept {
    return chars_[0];
  }

  [[nodiscard]] constexpr const_reference back() const noexcept {
    return chars_[N];
  }

  [[nodiscard]] constexpr size_type length() const noexcept {
    return size();
  }

  [[nodiscard]] constexpr bool empty() const noexcept {
    return false;
  }

  [[nodiscard]] constexpr int compare(string_view str) const noexcept {
    return string_view{data(), size()}.compare(str);
  }

  [[nodiscard]] constexpr const char* c_str() const noexcept {
    return data();
  }

  [[nodiscard]] string str() const {
    return {begin(), end()};
  }

  [[nodiscard]] constexpr operator string_view() const noexcept {
    return {data(), size()};
  }

  [[nodiscard]] constexpr explicit operator const_pointer() const noexcept {
    return data();
  }

  [[nodiscard]] explicit operator string() const {
    return {begin(), end()};
  }

 private:
  template <std::uint16_t... I>
  constexpr cstring(string_view str, std::integer_sequence<std::uint16_t, I...>) noexcept : chars_{str[I]..., '\0'} {
  }

  char chars_[static_cast<std::size_t>(N) + 1];
};

template <>
class [[nodiscard]] cstring<0> {
 public:
  using value_type = const char;
  using size_type = std::uint16_t;
  using difference_type = std::ptrdiff_t;
  using pointer = const char*;
  using const_pointer = const char*;
  using reference = const char&;
  using const_reference = const char&;

  using iterator = const char*;
  using const_iterator = const char*;

  using reverse_iterator = std::reverse_iterator<iterator>;
  using const_reverse_iterator = std::reverse_iterator<const_iterator>;

  constexpr explicit cstring(string_view) noexcept {
  }

  constexpr cstring() = default;

  constexpr cstring(const cstring&) = default;

  constexpr cstring(cstring&&) = default;

  ~cstring() = default;

  cstring& operator=(const cstring&) = default;

  cstring& operator=(cstring&&) = default;

  [[nodiscard]] constexpr const_pointer data() const noexcept {
    return nullptr;
  }

  [[nodiscard]] constexpr size_type size() const noexcept {
    return 0;
  }

  [[nodiscard]] constexpr const_iterator begin() const noexcept {
    return nullptr;
  }

  [[nodiscard]] constexpr const_iterator end() const noexcept {
    return nullptr;
  }

  [[nodiscard]] constexpr const_iterator cbegin() const noexcept {
    return nullptr;
  }

  [[nodiscard]] constexpr const_iterator cend() const noexcept {
    return nullptr;
  }

  [[nodiscard]] constexpr const_reverse_iterator rbegin() const noexcept {
    return {};
  }

  [[nodiscard]] constexpr const_reverse_iterator rend() const noexcept {
    return {};
  }

  [[nodiscard]] constexpr const_reverse_iterator crbegin() const noexcept {
    return {};
  }

  [[nodiscard]] constexpr const_reverse_iterator crend() const noexcept {
    return {};
  }

  [[nodiscard]] constexpr size_type length() const noexcept {
    return 0;
  }

  [[nodiscard]] constexpr bool empty() const noexcept {
    return true;
  }

  [[nodiscard]] constexpr int compare(string_view str) const noexcept {
    return string_view{}.compare(str);
  }

  [[nodiscard]] constexpr const char* c_str() const noexcept {
    return nullptr;
  }

  [[nodiscard]] string str() const {
    return {};
  }

  [[nodiscard]] constexpr operator string_view() const noexcept {
    return {};
  }

  [[nodiscard]] constexpr explicit operator const_pointer() const noexcept {
    return nullptr;
  }

  [[nodiscard]] explicit operator string() const {
    return {};
  }
};

template <std::uint16_t N>
[[nodiscard]] constexpr bool operator==(const cstring<N>& lhs, string_view rhs) noexcept {
  return lhs.compare(rhs) == 0;
}

template <std::uint16_t N>
[[nodiscard]] constexpr bool operator==(string_view lhs, const cstring<N>& rhs) noexcept {
  return lhs.compare(rhs) == 0;
}

template <std::uint16_t N>
[[nodiscard]] constexpr bool operator!=(const cstring<N>& lhs, string_view rhs) noexcept {
  return lhs.compare(rhs) != 0;
}

template <std::uint16_t N>
[[nodiscard]] constexpr bool operator!=(string_view lhs, const cstring<N>& rhs) noexcept {
  return lhs.compare(rhs) != 0;
}

template <std::uint16_t N>
[[nodiscard]] constexpr bool operator>(const cstring<N>& lhs, string_view rhs) noexcept {
  return lhs.compare(rhs) > 0;
}

template <std::uint16_t N>
[[nodiscard]] constexpr bool operator>(string_view lhs, const cstring<N>& rhs) noexcept {
  return lhs.compare(rhs) > 0;
}

template <std::uint16_t N>
[[nodiscard]] constexpr bool operator>=(const cstring<N>& lhs, string_view rhs) noexcept {
  return lhs.compare(rhs) >= 0;
}

template <std::uint16_t N>
[[nodiscard]] constexpr bool operator>=(string_view lhs, const cstring<N>& rhs) noexcept {
  return lhs.compare(rhs) >= 0;
}

template <std::uint16_t N>
[[nodiscard]] constexpr bool operator<(const cstring<N>& lhs, string_view rhs) noexcept {
  return lhs.compare(rhs) < 0;
}

template <std::uint16_t N>
[[nodiscard]] constexpr bool operator<(string_view lhs, const cstring<N>& rhs) noexcept {
  return lhs.compare(rhs) < 0;
}

template <std::uint16_t N>
[[nodiscard]] constexpr bool operator<=(const cstring<N>& lhs, string_view rhs) noexcept {
  return lhs.compare(rhs) <= 0;
}

template <std::uint16_t N>
[[nodiscard]] constexpr bool operator<=(string_view lhs, const cstring<N>& rhs) noexcept {
  return lhs.compare(rhs) <= 0;
}

template <typename Char, typename Traits, std::uint16_t N>
std::basic_ostream<Char, Traits>& operator<<(std::basic_ostream<Char, Traits>& os, const cstring<N>& srt) {
  for(const auto c : srt) {
    os.put(c);
  }
  return os;
}

NAMEOF_EXPORT_END

namespace detail {

constexpr string_view pretty_name(string_view name, bool remove_suffix = true) noexcept {
  if(name.size() >= 1 && (name[0] == '"' || name[0] == '\'')) {
    return {};  // Narrow multibyte string literal.
  } else if(name.size() >= 2 && name[0] == 'R' && (name[1] == '"' || name[1] == '\'')) {
    return {};  // Raw string literal.
  } else if(name.size() >= 2 && name[0] == 'L' && (name[1] == '"' || name[1] == '\'')) {
    return {};  // Wide string literal.
  } else if(name.size() >= 2 && name[0] == 'U' && (name[1] == '"' || name[1] == '\'')) {
    return {};  // UTF-32 encoded string literal.
  } else if(name.size() >= 2 && name[0] == 'u' && (name[1] == '"' || name[1] == '\'')) {
    return {};  // UTF-16 encoded string literal.
  } else if(name.size() >= 3 && name[0] == 'u' && name[1] == '8' && (name[2] == '"' || name[2] == '\'')) {
    return {};  // UTF-8 encoded string literal.
  } else if(name.size() >= 1 && (name[0] >= '0' && name[0] <= '9')) {
    return {};  // Invalid name.
  }

  for(std::size_t i = name.size(), h = 0, s = 0; i > 0; --i) {
    if(name[i - 1] == ')') {
      ++h;
      ++s;
      continue;
    } else if(name[i - 1] == '(') {
      --h;
      ++s;
      continue;
    }

    if(h == 0) {
      name.remove_suffix(s);
      break;
    } else {
      ++s;
      continue;
    }
  }

  std::size_t s = 0;
  for(std::size_t i = name.size(), h = 0; i > 0; --i) {
    if(name[i - 1] == '>') {
      ++h;
      ++s;
      continue;
    } else if(name[i - 1] == '<') {
      --h;
      ++s;
      continue;
    }

    if(h == 0) {
      break;
    } else {
      ++s;
      continue;
    }
  }

  for(std::size_t i = name.size() - s; i > 0; --i) {
    if(!((name[i - 1] >= '0' && name[i - 1] <= '9') || (name[i - 1] >= 'a' && name[i - 1] <= 'z') ||
         (name[i - 1] >= 'A' && name[i - 1] <= 'Z') || (name[i - 1] == '_'))) {
      name.remove_prefix(i);
      break;
    }
  }
  if(remove_suffix) {
    name.remove_suffix(s);
  }

  if(name.size() > 0 && ((name[0] >= 'a' && name[0] <= 'z') || (name[0] >= 'A' && name[0] <= 'Z') || (name[0] == '_'))) {
    return name;
  }

  return {};  // Invalid name.
}

#if defined(__cpp_lib_array_constexpr) && __cpp_lib_array_constexpr >= 201603L
#define NAMEOF_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 L, typename R>
constexpr bool cmp_less(L lhs, R rhs) noexcept {
  static_assert(std::is_integral_v<L> && std::is_integral_v<R>, "nameof::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>, "nameof::detail::log2 requires integral type.");

  if constexpr(std::is_same_v<I, bool>) {  // bool special case
    return assert(false), value;
  } else {
    auto ret = I{0};
    for(; value > I{1}; value >>= I{1}, ++ret) {
    }

    return ret;
  }
}

template <typename T>
struct nameof_enum_supported
#if defined(NAMEOF_ENUM_SUPPORTED) && NAMEOF_ENUM_SUPPORTED || defined(NAMEOF_ENUM_NO_CHECK_SUPPORT)
    : std::true_type {
};
#else
    : std::false_type {
};
#endif

template <typename T, typename R>
using enable_if_enum_t = std::enable_if_t<std::is_enum_v<std::decay_t<T>>, R>;

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, E V>
constexpr auto n() noexcept {
  static_assert(is_enum_v<E>, "nameof::detail::n requires enum type.");

  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)
    constexpr auto name = pretty_name({__FUNCSIG__, sizeof(__FUNCSIG__) - 17});
#else
    constexpr auto name = string_view{};
#endif
    return name;
  } else {
    return string_view{};
  }
}

template <typename E, E V>
constexpr auto enum_name() noexcept {
  [[maybe_unused]] constexpr auto custom_name = customize::enum_name<E>(V);

  if constexpr(custom_name.empty()) {
    constexpr auto name = n<E, V>();
    return cstring<name.size()>{name};
  } else {
    return cstring<custom_name.size()>{custom_name};
  }
}

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_name = customize::enum_name<E>(v);
  if constexpr(custom_name.empty()) {
    return n<E, v>().size() != 0;
  } else {
    return custom_name.size() != 0;
  }
}

template <typename E, int O, bool IsFlags, 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, "nameof::detail::ualue requires valid offset.");

    return static_cast<U>(i);
  } else if constexpr(IsFlags) {
    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, bool IsFlags, typename U = std::underlying_type_t<E>>
constexpr E value(std::size_t i) noexcept {
  return static_cast<E>(ualue<E, O, IsFlags>(i));
}

template <typename E, bool IsFlags, typename U = std::underlying_type_t<E>>
constexpr int reflected_min() noexcept {
  if constexpr(IsFlags) {
    return 0;
  } else {
    constexpr auto lhs = customize::enum_range<E>::min;
    constexpr auto rhs = (std::numeric_limits<U>::min)();

    if constexpr(cmp_less(rhs, lhs)) {
      return lhs;
    } else {
      return rhs;
    }
  }
}

template <typename E, bool IsFlags, typename U = std::underlying_type_t<E>>
constexpr int reflected_max() noexcept {
  if constexpr(IsFlags) {
    return std::numeric_limits<U>::digits - 1;
  } else {
    constexpr auto lhs = customize::enum_range<E>::max;
    constexpr auto rhs = (std::numeric_limits<U>::max)();

    if constexpr(cmp_less(lhs, rhs)) {
      return lhs;
    } else {
      return rhs;
    }
  }
}

#define NAMEOF_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, bool IsFlags, std::size_t Size, int Min, std::size_t I>
constexpr void valid_count(bool* valid, std::size_t& count) noexcept {
#define NAMEOF_ENUM_V(O)                                         \
  if constexpr((I + O) < Size) {                                 \
    if constexpr(is_valid<E, ualue<E, Min, IsFlags>(I + O)>()) { \
      valid[I + O] = true;                                       \
      ++count;                                                   \
    }                                                            \
  }

  NAMEOF_FOR_EACH_256(NAMEOF_ENUM_V)

  if constexpr((I + 256) < Size) {
    valid_count<E, IsFlags, Size, Min, I + 256>(valid, count);
  }
#undef NAMEOF_ENUM_V
}

template <std::size_t N>
struct valid_count_t {
  std::size_t count = 0;
  bool valid[N] = {};
};

template <typename E, bool IsFlags, std::size_t Size, int Min>
constexpr auto valid_count() noexcept {
  valid_count_t<Size> vc;
  valid_count<E, IsFlags, Size, Min, 0>(vc.valid, vc.count);
  return vc;
}

template <typename E, bool IsFlags, std::size_t Size, int Min>
constexpr auto values() noexcept {
  constexpr auto vc = valid_count<E, IsFlags, Size, Min>();

  if constexpr(vc.count > 0) {
#if defined(NAMEOF_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, IsFlags>(i);
      }
    }
#if defined(NAMEOF_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, bool IsFlags, typename U = std::underlying_type_t<E>>
constexpr auto values() noexcept {
  constexpr auto min = reflected_min<E, IsFlags>();
  constexpr auto max = reflected_max<E, IsFlags>();
  constexpr auto range_size = max - min + 1;
  static_assert(range_size > 0, "nameof::enum_range requires valid size.");
  static_assert(range_size < (std::numeric_limits<std::uint16_t>::max)(), "nameof::enum_range requires valid size.");

  return values<E, IsFlags, range_size, min>();
}

template <typename E, bool IsFlags = false>
inline constexpr auto values_v = values<E, IsFlags>();

template <typename E, bool IsFlags = false>
inline constexpr auto count_v = values_v<E, IsFlags>.size();

template <typename E, bool IsFlags = false, typename U = std::underlying_type_t<E>>
inline constexpr auto min_v = (count_v<E, IsFlags> > 0) ? static_cast<U>(values_v<E, IsFlags>.front()) : U{0};

template <typename E, bool IsFlags = false, typename U = std::underlying_type_t<E>>
inline constexpr auto max_v = (count_v<E, IsFlags> > 0) ? static_cast<U>(values_v<E, IsFlags>.back()) : U{0};

template <typename E, bool IsFlags, 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, IsFlags>[I]>...}};
  return names;
}

template <typename E, bool IsFlags = false>
inline constexpr auto names_v = names<E, IsFlags>(std::make_index_sequence<count_v<E, IsFlags>>{});

template <typename E, bool IsFlags, typename U = std::underlying_type_t<E>>
constexpr bool is_sparse() noexcept {
  if constexpr(count_v<E, IsFlags> == 0) {
    return false;
  } else if constexpr(std::is_same_v<U, bool>) {  // bool special case
    return false;
  } else {
    constexpr auto max = IsFlags ? log2(max_v<E, IsFlags>) : max_v<E, IsFlags>;
    constexpr auto min = IsFlags ? log2(min_v<E, IsFlags>) : min_v<E, IsFlags>;
    constexpr auto range_size = max - min + 1;

    return range_size != count_v<E, IsFlags>;
  }
}

template <typename E, bool IsFlags = false>
inline constexpr bool is_sparse_v = is_sparse<E, IsFlags>();

template <typename E, bool IsFlags = false, typename U = std::underlying_type_t<E>>
constexpr E enum_value(std::size_t i) noexcept {
  if constexpr(is_sparse_v<E, IsFlags>) {
    return values_v<E, IsFlags>[i];
  } else {
    constexpr auto min = IsFlags ? log2(min_v<E, IsFlags>) : min_v<E, IsFlags>;

    return value<E, min, IsFlags>(i);
  }
}

template <typename... T>
struct nameof_type_supported
#if defined(NAMEOF_TYPE_SUPPORTED) && NAMEOF_TYPE_SUPPORTED || defined(NAMEOF_TYPE_NO_CHECK_SUPPORT)
    : std::true_type {
};
#else
    : std::false_type {
};
#endif

template <typename... T>
struct nameof_type_rtti_supported
#if defined(NAMEOF_TYPE_RTTI_SUPPORTED) && NAMEOF_TYPE_RTTI_SUPPORTED || defined(NAMEOF_TYPE_NO_CHECK_SUPPORT)
    : std::true_type {
};
#else
    : std::false_type {
};
#endif

template <typename... T>
struct nameof_member_supported
#if defined(NAMEOF_MEMBER_SUPPORTED) && NAMEOF_MEMBER_SUPPORTED || defined(NAMEOF_TYPE_NO_CHECK_SUPPORT)
    : std::true_type {
};
#else
    : std::false_type {
};
#endif

template <typename... T>
struct nameof_pointer_supported
#if defined(NAMEOF_POINTER_SUPPORTED) && NAMEOF_POINTER_SUPPORTED || defined(NAMEOF_TYPE_NO_CHECK_SUPPORT)
    : std::true_type {
};
#else
    : std::false_type {
};
#endif

#if defined(_MSC_VER) && !defined(__clang__)
template <typename T>
struct identity {
  using type = T;
};
#else
template <typename T>
using identity = T;
#endif

template <typename T>
using remove_cvref_t = std::remove_cv_t<std::remove_reference_t<T>>;

template <typename T, typename R>
using enable_if_has_short_name_t = std::enable_if_t<!std::is_array_v<T> && !std::is_pointer_v<T>, R>;

template <typename... T>
constexpr auto n() noexcept {
#if defined(_MSC_VER) && !defined(__clang__)
  [[maybe_unused]] constexpr auto custom_name = customize::type_name<typename T::type...>();
#else
  [[maybe_unused]] constexpr auto custom_name = customize::type_name<T...>();
#endif

  if constexpr(custom_name.empty() && nameof_type_supported<T...>::value) {
#if defined(__clang__)
    constexpr string_view name{__PRETTY_FUNCTION__ + 31, sizeof(__PRETTY_FUNCTION__) - 34};
#elif defined(__GNUC__)
    constexpr string_view name{__PRETTY_FUNCTION__ + 46, sizeof(__PRETTY_FUNCTION__) - 49};
#elif defined(_MSC_VER)
    constexpr string_view name{__FUNCSIG__ + 63, sizeof(__FUNCSIG__) - 81 - (__FUNCSIG__[sizeof(__FUNCSIG__) - 19] == ' ' ? 1 : 0)};
#else
    constexpr auto name = string_view{};
#endif
    return cstring<name.size()>{name};
  } else {
    return cstring<custom_name.size()>{custom_name};
  }
}

template <typename... T>
inline constexpr auto type_name_v = n<T...>();

#if __has_include(<cxxabi.h>)
template <typename T>
string nameof_type_rtti(const char* tn) {
  static_assert(nameof_type_rtti_supported<T>::value,
                "nameof::nameof_type_rtti unsupported compiler (https://github.com/Neargye/nameof#compiler-compatibility).");
  const auto dmg = abi::__cxa_demangle(tn, nullptr, nullptr, nullptr);
  const auto name = string{dmg};
  free(dmg);
  assert(!name.empty() && "Type does not have a name.");

  return name;
}

template <typename T>
string nameof_full_type_rtti(const char* tn) {
  static_assert(nameof_type_rtti_supported<T>::value,
                "nameof::nameof_type_rtti unsupported compiler (https://github.com/Neargye/nameof#compiler-compatibility).");
  const auto dmg = abi::__cxa_demangle(tn, nullptr, nullptr, nullptr);
  auto name = string{dmg};
  free(dmg);
  assert(!name.empty() && "Type does not have a name.");
  if constexpr(std::is_const_v<std::remove_reference_t<T>>) {
    name = string{"const "}.append(name);
  }
  if constexpr(std::is_volatile_v<std::remove_reference_t<T>>) {
    name = string{"volatile "}.append(name);
  }
  if constexpr(std::is_lvalue_reference_v<T>) {
    name.append(1, '&');
  }
  if constexpr(std::is_rvalue_reference_v<T>) {
    name.append("&&");
  }

  return name;
}

template <typename T, enable_if_has_short_name_t<T, int> = 0>
string nameof_short_type_rtti(const char* tn) {
  static_assert(nameof_type_rtti_supported<T>::value,
                "nameof::nameof_type_rtti unsupported compiler (https://github.com/Neargye/nameof#compiler-compatibility).");
  const auto dmg = abi::__cxa_demangle(tn, nullptr, nullptr, nullptr);
  const auto pname = pretty_name(dmg);
  const auto name = string{pname.data(), pname.size()};
  free(dmg);
  assert(!name.empty() && "Type does not have a short name.");

  return name;
}
#else
template <typename T>
string nameof_type_rtti(const char* tn) {
  static_assert(nameof_type_rtti_supported<T>::value,
                "nameof::nameof_type_rtti unsupported compiler (https://github.com/Neargye/nameof#compiler-compatibility).");
  const auto name = string_view{tn};
  assert(!name.empty() && "Type does not have a name.");
  return {name.data(), name.size()};
}

template <typename T>
string nameof_full_type_rtti(const char* tn) {
  static_assert(nameof_type_rtti_supported<T>::value,
                "nameof::nameof_type_rtti unsupported compiler (https://github.com/Neargye/nameof#compiler-compatibility).");
  auto name = string{tn};
  assert(!name.empty() && "Type does not have a name.");
  if constexpr(std::is_const_v<std::remove_reference_t<T>>) {
    name = string{"const "}.append(name);
  }
  if constexpr(std::is_volatile_v<std::remove_reference_t<T>>) {
    name = string{"volatile "}.append(name);
  }
  if constexpr(std::is_lvalue_reference_v<T>) {
    name.append(1, '&');
  }
  if constexpr(std::is_rvalue_reference_v<T>) {
    name.append("&&");
  }
  return name;
}

template <typename T, enable_if_has_short_name_t<T, int> = 0>
string nameof_short_type_rtti(const char* tn) {
  static_assert(nameof_type_rtti_supported<T>::value,
                "nameof::nameof_type_rtti unsupported compiler (https://github.com/Neargye/nameof#compiler-compatibility).");
  const auto name = pretty_name(tn);
  assert(!name.empty() && "Type does not have a short name.");
  return {name.data(), name.size()};
}
#endif

template <auto V, auto U = V>
constexpr auto n() noexcept {
  [[maybe_unused]] constexpr auto custom_name = customize::member_name<V>();

  if constexpr(custom_name.empty() && nameof_member_supported<decltype(V)>::value) {
#if defined(__clang__) || defined(__GNUC__)
    constexpr auto name = pretty_name({__PRETTY_FUNCTION__, sizeof(__PRETTY_FUNCTION__) - 2});
#elif defined(_MSC_VER) && defined(_MSVC_LANG) && _MSVC_LANG >= 202002L
    constexpr auto name = pretty_name({__FUNCSIG__, sizeof(__FUNCSIG__) - 18 + std::is_member_function_pointer_v<decltype(U)>});
#else
    constexpr auto name = string_view{};
#endif
    return cstring<name.size()>{name};
  } else {
    return cstring<custom_name.size()>{custom_name};
  }
}

#if defined(__clang__) || defined(__GNUC__)
template <auto V>
inline constexpr auto member_name_v = n<V>();
#elif defined(_MSC_VER) && defined(_MSVC_LANG) && _MSVC_LANG >= 202002L
template <typename From, typename Type>
From get_base_type(Type From::*);

template <typename T>
extern T nonexist_object;

template <class T>
struct Store {
  T v;
};

template <class T>
Store(T) -> Store<T>;

template <auto V>
consteval auto get_member_name() noexcept {
  if constexpr(std::is_member_function_pointer_v<decltype(V)>) {
    return n<V>();
  } else {
    constexpr bool is_defined = sizeof(decltype(get_base_type(V))) != 0;
    static_assert(is_defined,
                  "nameof::nameof_member member name can use only if the struct is already fully defined. Please use NAMEOF macro, or "
                  "separate definition and declaration.");
    if constexpr(is_defined) {
      return n<V, Store{&(nonexist_object<decltype(get_base_type(V))>.*V)}>();
    } else {
      return "";
    }
  }
}

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>{};
#endif

template <auto U, auto V>
struct is_same : std::false_type {};

template <auto U>
struct is_same<U, U> : std::true_type {};

template <auto P>
constexpr bool is_nullptr_v = is_same<P, static_cast<std::remove_reference_t<decltype(P)>>(nullptr)>::value;

template <auto V>
constexpr auto p() noexcept {
  [[maybe_unused]] constexpr auto custom_name =
      customize::pointer_name<V>().empty() && is_nullptr_v<V> ? "nullptr" : customize::pointer_name<V>();

  if constexpr(custom_name.empty() && nameof_pointer_supported<decltype(V)>::value) {
#if defined(__clang__)
    constexpr auto name = pretty_name({__PRETTY_FUNCTION__, sizeof(__PRETTY_FUNCTION__) - 2});
#elif defined(__GNUC__)
    constexpr bool has_parenthesis = __PRETTY_FUNCTION__[sizeof(__PRETTY_FUNCTION__) - 3] == ')';
    constexpr auto name = pretty_name({__PRETTY_FUNCTION__, sizeof(__PRETTY_FUNCTION__) - 2 - has_parenthesis});
#elif defined(_MSC_VER) && defined(_MSVC_LANG) && _MSVC_LANG >= 202002L
    constexpr auto name = pretty_name({__FUNCSIG__, sizeof(__FUNCSIG__) - 17});
#else
    constexpr auto name = string_view{};
#endif
    return cstring<name.size()>{name};
  } else {
    return cstring<custom_name.size()>{custom_name};
  }
}

template <auto V>
inline constexpr auto pointer_name_v = p<V>();

}  // namespace detail

NAMEOF_EXPORT_BEGIN

// Checks is nameof_type supported compiler.
inline constexpr bool is_nameof_type_supported = detail::nameof_type_supported<void>::value;

// Checks is nameof_type_rtti supported compiler.
inline constexpr bool is_nameof_type_rtti_supported = detail::nameof_type_rtti_supported<void>::value;

// Checks is nameof_member supported compiler.
inline constexpr bool is_nameof_member_supported = detail::nameof_member_supported<void>::value;

// Checks is nameof_pointer supported compiler.
inline constexpr bool is_nameof_pointer_supported = detail::nameof_pointer_supported<void>::value;

// Checks is nameof_enum supported compiler.
inline constexpr bool is_nameof_enum_supported = detail::nameof_enum_supported<void>::value;

// Obtains name of enum variable.
template <typename E>
[[nodiscard]] constexpr auto nameof_enum(E value) noexcept -> detail::enable_if_enum_t<E, string_view> {
  using D = std::decay_t<E>;
  using U = std::underlying_type_t<D>;
  static_assert(detail::nameof_enum_supported<D>::value,
                "nameof::nameof_enum unsupported compiler (https://github.com/Neargye/nameof#compiler-compatibility).");
  static_assert(detail::count_v<D> > 0, "nameof::nameof_enum requires enum implementation and valid max and min.");

  if constexpr(detail::is_sparse_v<D>) {
    for(std::size_t i = 0; i < detail::count_v<D>; ++i) {
      if(detail::enum_value<D>(i) == value) {
        return detail::names_v<D>[i];
      }
    }
  } else {
    const auto v = static_cast<U>(value);
    if(v >= detail::min_v<D> && v <= detail::max_v<D>) {
      return detail::names_v<D>[static_cast<std::size_t>(v - detail::min_v<D>)];
    }
  }
  return {};  // Value out of range.
}

// Obtains name of enum variable or default value if enum variable out of range.
template <typename E>
[[nodiscard]] auto nameof_enum_or(E value, string_view default_value) -> detail::enable_if_enum_t<E, string> {
  using D = std::decay_t<E>;
  static_assert(detail::nameof_enum_supported<D>::value,
                "nameof::nameof_enum_or unsupported compiler (https://github.com/Neargye/nameof#compiler-compatibility).");
  static_assert(detail::count_v<D> > 0, "nameof::nameof_enum_or requires enum implementation and valid max and min.");

  if(auto v = nameof_enum<D>(value); !v.empty()) {
    return string{v.data(), v.size()};
  }
  return string{default_value.data(), default_value.size()};
}

// Obtains name of enum-flags variable.
template <typename E>
[[nodiscard]] auto nameof_enum_flag(E value, char sep = '|') -> detail::enable_if_enum_t<E, string> {
  using D = std::decay_t<E>;
  using U = std::underlying_type_t<D>;
  static_assert(detail::nameof_enum_supported<D>::value,
                "nameof::nameof_enum_flag unsupported compiler (https://github.com/Neargye/nameof#compiler-compatibility).");
  static_assert(detail::count_v<D, true> > 0, "nameof::nameof_enum_flag requires enum-flags implementation.");

  string name;
  auto check_value = U{0};
  for(std::size_t i = 0; i < detail::count_v<D, true>; ++i) {
    if(const auto v = static_cast<U>(detail::enum_value<D, true>(i)); (static_cast<U>(value) & v) != 0) {
      if(const auto n = detail::names_v<D, true>[i]; !n.empty()) {
        check_value |= v;
        if(!name.empty()) {
          name.append(1, sep);
        }
        name.append(n.data(), n.size());
      } else {
        return {};  // Value out of range.
      }
    }
  }

  if(check_value != 0 && check_value == static_cast<U>(value)) {
    return name;
  }
  return {};  // Invalid value or out of range.
}

// Obtains name of static storage enum variable.
// This version is much lighter on the compile times and is not restricted to the enum_range limitation.
template <auto V, detail::enable_if_enum_t<decltype(V), int> = 0>
[[nodiscard]] constexpr auto nameof_enum() noexcept {
  using D = std::decay_t<decltype(V)>;
  static_assert(std::is_enum_v<D>, "nameof::nameof_enum requires member enum type.");
  static_assert(detail::nameof_enum_supported<D>::value,
                "nameof::nameof_enum unsupported compiler (https://github.com/Neargye/nameof#compiler-compatibility).");
  return detail::enum_name_v<D, V>;
}

// Obtains name of type, reference and cv-qualifiers are ignored.
template <typename T>
[[nodiscard]] constexpr string_view nameof_type() noexcept {
  using U = detail::identity<detail::remove_cvref_t<T>>;
  static_assert(detail::nameof_type_supported<U>::value,
                "nameof::nameof_type unsupported compiler (https://github.com/Neargye/nameof#compiler-compatibility).");
  return detail::type_name_v<U>;
}

// Obtains full name of type, with reference and cv-qualifiers.
template <typename T>
[[nodiscard]] constexpr string_view nameof_full_type() noexcept {
  using U = detail::identity<T>;
  static_assert(detail::nameof_type_supported<U>::value,
                "nameof::nameof_type unsupported compiler (https://github.com/Neargye/nameof#compiler-compatibility).");
  return detail::type_name_v<U>;
}

// Obtains short name of type.
template <typename T, detail::enable_if_has_short_name_t<T, int> = 0>
[[nodiscard]] constexpr auto nameof_short_type() noexcept {
  using U = detail::identity<detail::remove_cvref_t<T>>;
  static_assert(detail::nameof_type_supported<U>::value,
                "nameof::nameof_type unsupported compiler (https://github.com/Neargye/nameof#compiler-compatibility).");
  static_assert(!std::is_array_v<T> && !std::is_pointer_v<T>, "nameof::nameof_member requires non array and non pointer type.");
  constexpr string_view name = detail::pretty_name(detail::type_name_v<U>);
  static_assert(!name.empty(), "Type does not have a short name.");
  return cstring<name.size()>{name};
}

// Obtains name of member.
template <auto V, std::enable_if_t<std::is_member_pointer_v<decltype(V)>, int> = 0>
[[nodiscard]] constexpr auto nameof_member() noexcept {
  using U = decltype(V);
  static_assert(std::is_member_pointer_v<U>, "nameof::nameof_member requires member pointer type.");
  static_assert(detail::nameof_member_supported<U>::value,
                "nameof::nameof_member unsupported compiler (https://github.com/Neargye/nameof#compiler-compatibility).");
  return detail::member_name_v<V>;
}

// Obtains name of a function, a global or class static variable.
template <auto V, std::enable_if_t<std::is_pointer_v<decltype(V)>, int> = 0>
[[nodiscard]] constexpr auto nameof_pointer() noexcept {
  using U = decltype(V);
  static_assert(std::is_pointer_v<U>, "nameof::nameof_pointer requires pointer type.");
  static_assert(detail::nameof_pointer_supported<U>::value,
                "nameof::nameof_pointer unsupported compiler (https://github.com/Neargye/nameof#compiler-compatibility).");
  return detail::pointer_name_v<V>;
}

NAMEOF_EXPORT_END

}  // namespace nameof

#if defined(__clang__)
#pragma clang diagnostic pop
#elif defined(__GNUC__)
#pragma GCC diagnostic pop
#elif defined(_MSC_VER)
#pragma warning(pop)
#endif

#endif  // NEARGYE_NAMEOF_HPP