meta.hpp

/*
MIT License
 
Copyright (c) 2024 mguludag
 
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 DETAIL_META_HPP
#define DETAIL_META_HPP
 
#include "mgutility/_common/definitions.hpp"
#include "mgutility/std/utility.hpp"
#include <initializer_list>
#include <type_traits>
#include <utility>
 
namespace mgutility {
namespace detail {
 
#ifndef MGUTILITY_ENUM_RANGE_MIN
// NOLINTNEXTLINE [cppcoreguidelines-macro-usage]
#define MGUTILITY_ENUM_RANGE_MIN 0
#endif
 
#ifndef MGUTILITY_ENUM_RANGE_MAX
// NOLINTNEXTLINE [cppcoreguidelines-macro-usage]
#define MGUTILITY_ENUM_RANGE_MAX 256
#endif
 
#ifndef MGUTILITY_ENUM_NAME_BUFFER_SIZE
// NOLINTNEXTLINE [cppcoreguidelines-macro-usage]
#define MGUTILITY_ENUM_NAME_BUFFER_SIZE 32U
#endif
 
#ifndef MGUTILITY_INLINE
#if MGUTILITY_CPLUSPLUS > 201402L
#define MGUTILITY_INLINE inline
#else
#define MGUTILITY_INLINE
#endif
#endif
 
template <typename E> struct is_scoped_enum {
  static constexpr auto value =
      // NOLINTNEXTLINE [modernize-type-traits]
      std::is_enum<E>::value &&
      // NOLINTNEXTLINE [modernize-type-traits]
      !std::is_convertible<E, typename std::underlying_type<E>::type>::value;
};
 
template <typename T, typename = void> struct has_bit_or : std::false_type {};
 
template <typename T>
struct has_bit_or<T, decltype((T{} | T{}), void())> : std::true_type {};
 
#if MGUTILITY_CPLUSPLUS > 201103L
template <typename E>
static constexpr bool is_scoped_enum_v = is_scoped_enum<E>::value;
#endif
 
template <bool B, class T = void>
// NOLINTNEXTLINE [modernize-type-traits]
using enable_if_t = typename std::enable_if<B, T>::type;
 
template <typename T>
// NOLINTNEXTLINE [modernize-type-traits]
using underlying_type_t = typename std::underlying_type<T>::type;
 
template <typename T>
// NOLINTNEXTLINE [modernize-type-traits]
using remove_const_t = typename std::remove_const<T>::type;
 
template <typename Enum, Enum... Values> struct enum_sequence {};
 
template <typename Enum, int Min, typename Seq> struct enum_sequence_from_index;
 
template <typename Enum, int Min, std::size_t... I>
struct enum_sequence_from_index<Enum, Min, index_sequence<I...>> {
private:
  // NOLINTNEXTLINE [readability-identifier-length]
  static constexpr int offset(std::size_t i) {
    return Min + static_cast<int>(i);
  }
 
public:
  using type = enum_sequence<Enum, static_cast<Enum>(offset(I))...>;
};
 
template <typename Enum, int Min, int Max>
using make_enum_sequence = typename enum_sequence_from_index<
    Enum, Min,
    make_index_sequence<static_cast<std::size_t>(Max - Min + 1)>>::type;
} // namespace detail
 
template <typename T> struct enum_range {
  static constexpr auto min{MGUTILITY_ENUM_RANGE_MIN};
  static constexpr auto max{MGUTILITY_ENUM_RANGE_MAX};
};
 
template <typename T, typename U> struct pair {
  T first;
  U second;
};
 
template <typename T>
#if MGUTILITY_CPLUSPLUS >= 201402L || defined(__GNUC__) && !defined(__clang__)
using flat_map = std::initializer_list<pair<T, const char *>>;
#else
// NOLINTNEXTLINE [cppcoreguidelines-avoid-c-arrays]
using flat_map = pair<T, const char *>[];
#endif
 
template <typename T> struct custom_enum {
  // #if MGUTILITY_CPLUSPLUS > 201402L
  static MGUTILITY_INLINE constexpr flat_map<T> map = {};
  // #else
  //     static constexpr flat_map<T> map() noexcept {
  //         return {}; // default: empty map
  //     }
  // #endif
};
 
template <typename T> struct enum_name_buffer {
  static constexpr auto size = MGUTILITY_ENUM_NAME_BUFFER_SIZE;
};
 
} // namespace mgutility
 
#endif // DETAIL_META_HPP