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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP___TYPE_TRAITS_MAKE_UNSIGNED_H
#define _LIBCPP___TYPE_TRAITS_MAKE_UNSIGNED_H
#include <__config>
#include <__type_traits/apply_cv.h>
#include <__type_traits/conditional.h>
#include <__type_traits/is_enum.h>
#include <__type_traits/is_integral.h>
#include <__type_traits/is_unsigned.h>
#include <__type_traits/nat.h>
#include <__type_traits/remove_cv.h>
#include <__type_traits/type_list.h>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_BEGIN_NAMESPACE_STD
#if __has_builtin(__make_unsigned)
template <class _Tp>
using __make_unsigned_t = __make_unsigned(_Tp);
#else
// clang-format off
typedef __type_list<unsigned char,
__type_list<unsigned short,
__type_list<unsigned int,
__type_list<unsigned long,
__type_list<unsigned long long,
# ifndef _LIBCPP_HAS_NO_INT128
__type_list<__uint128_t,
# endif
__nat
# ifndef _LIBCPP_HAS_NO_INT128
>
# endif
> > > > > __unsigned_types;
// clang-format on
template <class _Tp, bool = is_integral<_Tp>::value || is_enum<_Tp>::value>
struct __make_unsigned{};
template <class _Tp>
struct __make_unsigned<_Tp, true> {
typedef typename __find_first<__unsigned_types, sizeof(_Tp)>::type type;
};
// clang-format off
template <> struct __make_unsigned<bool, true> {};
template <> struct __make_unsigned< signed short, true> {typedef unsigned short type;};
template <> struct __make_unsigned<unsigned short, true> {typedef unsigned short type;};
template <> struct __make_unsigned< signed int, true> {typedef unsigned int type;};
template <> struct __make_unsigned<unsigned int, true> {typedef unsigned int type;};
template <> struct __make_unsigned< signed long, true> {typedef unsigned long type;};
template <> struct __make_unsigned<unsigned long, true> {typedef unsigned long type;};
template <> struct __make_unsigned< signed long long, true> {typedef unsigned long long type;};
template <> struct __make_unsigned<unsigned long long, true> {typedef unsigned long long type;};
# ifndef _LIBCPP_HAS_NO_INT128
template <> struct __make_unsigned<__int128_t, true> {typedef __uint128_t type;};
template <> struct __make_unsigned<__uint128_t, true> {typedef __uint128_t type;};
# endif
// clang-format on
template <class _Tp>
using __make_unsigned_t = __apply_cv_t<_Tp, typename __make_unsigned<__remove_cv_t<_Tp> >::type>;
#endif // __has_builtin(__make_unsigned)
template <class _Tp>
struct make_unsigned {
using type _LIBCPP_NODEBUG = __make_unsigned_t<_Tp>;
};
#if _LIBCPP_STD_VER >= 14
template <class _Tp>
using make_unsigned_t = __make_unsigned_t<_Tp>;
#endif
#ifndef _LIBCPP_CXX03_LANG
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI constexpr __make_unsigned_t<_Tp> __to_unsigned_like(_Tp __x) noexcept {
return static_cast<__make_unsigned_t<_Tp> >(__x);
}
#endif
template <class _Tp, class _Up>
using __copy_unsigned_t = __conditional_t<is_unsigned<_Tp>::value, __make_unsigned_t<_Up>, _Up>;
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP___TYPE_TRAITS_MAKE_UNSIGNED_H
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