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_SIGNED_H 10#define _LIBCPP___TYPE_TRAITS_MAKE_SIGNED_H 11 12#include <__config> 13#include <__type_traits/apply_cv.h> 14#include <__type_traits/is_enum.h> 15#include <__type_traits/is_integral.h> 16#include <__type_traits/nat.h> 17#include <__type_traits/remove_cv.h> 18#include <__type_traits/type_list.h> 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#if __has_builtin(__make_signed) 27 28template <class _Tp> 29using __make_signed_t = __make_signed(_Tp); 30 31#else 32// clang-format off 33typedef __type_list<signed char, 34 __type_list<signed short, 35 __type_list<signed int, 36 __type_list<signed long, 37 __type_list<signed long long, 38# ifndef _LIBCPP_HAS_NO_INT128 39 __type_list<__int128_t, 40# endif 41 __nat 42# ifndef _LIBCPP_HAS_NO_INT128 43 > 44# endif 45 > > > > > __signed_types; 46// clang-format on 47 48template <class _Tp, bool = is_integral<_Tp>::value || is_enum<_Tp>::value> 49struct __make_signed{}; 50 51template <class _Tp> 52struct __make_signed<_Tp, true> { 53 typedef typename __find_first<__signed_types, sizeof(_Tp)>::type type; 54}; 55 56// clang-format off 57template <> struct __make_signed<bool, true> {}; 58template <> struct __make_signed< signed short, true> {typedef short type;}; 59template <> struct __make_signed<unsigned short, true> {typedef short type;}; 60template <> struct __make_signed< signed int, true> {typedef int type;}; 61template <> struct __make_signed<unsigned int, true> {typedef int type;}; 62template <> struct __make_signed< signed long, true> {typedef long type;}; 63template <> struct __make_signed<unsigned long, true> {typedef long type;}; 64template <> struct __make_signed< signed long long, true> {typedef long long type;}; 65template <> struct __make_signed<unsigned long long, true> {typedef long long type;}; 66# ifndef _LIBCPP_HAS_NO_INT128 67template <> struct __make_signed<__int128_t, true> {typedef __int128_t type;}; 68template <> struct __make_signed<__uint128_t, true> {typedef __int128_t type;}; 69# endif 70// clang-format on 71 72template <class _Tp> 73using __make_signed_t = __apply_cv_t<_Tp, typename __make_signed<__remove_cv_t<_Tp> >::type>; 74 75#endif // __has_builtin(__make_signed) 76 77template <class _Tp> 78struct make_signed { 79 using type _LIBCPP_NODEBUG = __make_signed_t<_Tp>; 80}; 81 82#if _LIBCPP_STD_VER >= 14 83template <class _Tp> 84using make_signed_t = __make_signed_t<_Tp>; 85#endif 86 87_LIBCPP_END_NAMESPACE_STD 88 89#endif // _LIBCPP___TYPE_TRAITS_MAKE_SIGNED_H 90