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 typedef 27 __type_list<signed char, 28 __type_list<signed short, 29 __type_list<signed int, 30 __type_list<signed long, 31 __type_list<signed long long, 32 #ifndef _LIBCPP_HAS_NO_INT128 33 __type_list<__int128_t, 34 #endif 35 __nat 36 #ifndef _LIBCPP_HAS_NO_INT128 37 > 38 #endif 39 > > > > > __signed_types; 40 41 template <class _Tp, bool = is_integral<_Tp>::value || is_enum<_Tp>::value> 42 struct __make_signed {}; 43 44 template <class _Tp> 45 struct __make_signed<_Tp, true> 46 { 47 typedef typename __find_first<__signed_types, sizeof(_Tp)>::type type; 48 }; 49 50 template <> struct __make_signed<bool, true> {}; 51 template <> struct __make_signed< signed short, true> {typedef short type;}; 52 template <> struct __make_signed<unsigned short, true> {typedef short type;}; 53 template <> struct __make_signed< signed int, true> {typedef int type;}; 54 template <> struct __make_signed<unsigned int, true> {typedef int type;}; 55 template <> struct __make_signed< signed long, true> {typedef long type;}; 56 template <> struct __make_signed<unsigned long, true> {typedef long type;}; 57 template <> struct __make_signed< signed long long, true> {typedef long long type;}; 58 template <> struct __make_signed<unsigned long long, true> {typedef long long type;}; 59 #ifndef _LIBCPP_HAS_NO_INT128 60 template <> struct __make_signed<__int128_t, true> {typedef __int128_t type;}; 61 template <> struct __make_signed<__uint128_t, true> {typedef __int128_t type;}; 62 #endif 63 64 template <class _Tp> 65 struct _LIBCPP_TEMPLATE_VIS make_signed 66 { 67 typedef typename __apply_cv<_Tp, typename __make_signed<typename remove_cv<_Tp>::type>::type>::type type; 68 }; 69 70 #if _LIBCPP_STD_VER > 11 71 template <class _Tp> using make_signed_t = typename make_signed<_Tp>::type; 72 #endif 73 74 _LIBCPP_END_NAMESPACE_STD 75 76 #endif // _LIBCPP___TYPE_TRAITS_MAKE_SIGNED_H 77