1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef _LIBCPP___TYPE_TRAITS_MAKE_32_64_OR_128_BIT_H 10 #define _LIBCPP___TYPE_TRAITS_MAKE_32_64_OR_128_BIT_H 11 12 #include <__config> 13 #include <__type_traits/conditional.h> 14 #include <__type_traits/is_same.h> 15 #include <__type_traits/is_signed.h> 16 #include <__type_traits/is_unsigned.h> 17 #include <__type_traits/make_unsigned.h> 18 #include <cstdint> 19 20 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 21 # pragma GCC system_header 22 #endif 23 24 _LIBCPP_BEGIN_NAMESPACE_STD 25 26 /// Helper to promote an integral to smallest 32, 64, or 128 bit representation. 27 /// 28 /// The restriction is the same as the integral version of to_char. 29 template <class _Tp> 30 #if _LIBCPP_STD_VER >= 20 31 requires(is_signed_v<_Tp> || is_unsigned_v<_Tp> || is_same_v<_Tp, char>) 32 #endif 33 // clang-format off 34 using __make_32_64_or_128_bit_t = 35 __copy_unsigned_t<_Tp, 36 __conditional_t<sizeof(_Tp) <= sizeof(int32_t), int32_t, 37 __conditional_t<sizeof(_Tp) <= sizeof(int64_t), int64_t, 38 #ifndef _LIBCPP_HAS_NO_INT128 39 __conditional_t<sizeof(_Tp) <= sizeof(__int128_t), __int128_t, 40 /* else */ void> 41 #else 42 /* else */ void 43 #endif 44 > > >; 45 // clang-format on 46 47 _LIBCPP_END_NAMESPACE_STD 48 49 #endif // _LIBCPP___TYPE_TRAITS_MAKE_32_64_OR_128_BIT_H 50