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ImHex/plugins/libimhex/include/hex/helpers/concepts.hpp

163 lines
4.1 KiB
C++

#pragma once
#include <hex.hpp>
#include <type_traits>
namespace hex {
template<typename>
struct is_integral_helper : public std::false_type { };
template<>
struct is_integral_helper<u8> : public std::true_type { };
template<>
struct is_integral_helper<s8> : public std::true_type { };
template<>
struct is_integral_helper<u16> : public std::true_type { };
template<>
struct is_integral_helper<s16> : public std::true_type { };
template<>
struct is_integral_helper<u32> : public std::true_type { };
template<>
struct is_integral_helper<s32> : public std::true_type { };
template<>
struct is_integral_helper<u64> : public std::true_type { };
template<>
struct is_integral_helper<s64> : public std::true_type { };
template<>
struct is_integral_helper<u128> : public std::true_type { };
template<>
struct is_integral_helper<s128> : public std::true_type { };
template<>
struct is_integral_helper<bool> : public std::true_type { };
template<>
struct is_integral_helper<char> : public std::true_type { };
template<>
struct is_integral_helper<char8_t> : public std::true_type { };
template<>
struct is_integral_helper<char16_t> : public std::true_type { };
template<>
struct is_integral_helper<char32_t> : public std::true_type { };
template<>
struct is_integral_helper<wchar_t> : public std::true_type { };
template<typename T>
struct is_integral : public is_integral_helper<std::remove_cvref_t<T>>::type { };
template<typename>
struct is_signed_helper : public std::false_type { };
template<>
struct is_signed_helper<s8> : public std::true_type { };
template<>
struct is_signed_helper<s16> : public std::true_type { };
template<>
struct is_signed_helper<s32> : public std::true_type { };
template<>
struct is_signed_helper<s64> : public std::true_type { };
template<>
struct is_signed_helper<s128> : public std::true_type { };
template<>
struct is_signed_helper<char> : public std::true_type { };
template<>
struct is_signed_helper<float> : public std::true_type { };
template<>
struct is_signed_helper<double> : public std::true_type { };
template<>
struct is_signed_helper<long double> : public std::true_type { };
template<typename T>
struct is_signed : public is_signed_helper<std::remove_cvref_t<T>>::type { };
template<typename>
struct is_floating_point_helper : public std::false_type { };
template<>
struct is_floating_point_helper<float> : public std::true_type { };
template<>
struct is_floating_point_helper<double> : public std::true_type { };
template<>
struct is_floating_point_helper<long double> : public std::true_type { };
template<typename T>
struct is_floating_point : public is_floating_point_helper<std::remove_cvref_t<T>>::type { };
}
#if defined(_LIBCPP_VERSION) && _LIBCPP_VERSION <= 12000
#if __has_include(<concepts>)
// Make sure we break when derived_from is implemented in libc++. Then we can fix a compatibility version above
#include <concepts>
#endif
// libcxx 12 still doesn't have many default concepts implemented, as a result we need to define it ourself using clang built-ins.
// [concept.derived] (patch from https://reviews.llvm.org/D74292)
namespace hex {
template<class _Dp, class _Bp>
concept derived_from =
__is_base_of(_Bp, _Dp) && __is_convertible_to(const volatile _Dp*, const volatile _Bp*);
}
#else
// Assume supported
#include <concepts>
namespace hex {
using std::derived_from;
}
#endif
// [concepts.arithmetic]
namespace hex {
template<class T>
concept integral = hex::is_integral<T>::value;
template<class T>
concept signed_integral = integral<T> && hex::is_signed<T>::value;
template<class T>
concept unsigned_integral = integral<T> && !signed_integral<T>;
template<class T>
concept floating_point = std::is_floating_point<T>::value;
}
namespace hex {
template<typename T>
struct always_false : std::false_type {};
template<typename T, size_t Size>
concept has_size = sizeof(T) == Size;
}