1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // type_traits 11 12 // make_signed 13 14 #include <type_traits> 15 16 enum Enum {zero, one_}; 17 18 enum BigEnum 19 { 20 bigzero, 21 big = 0xFFFFFFFFFFFFFFFFULL 22 }; 23 24 #if !defined(_LIBCPP_HAS_NO_INT128) && !defined(_LIBCPP_HAS_NO_STRONG_ENUMS) 25 enum HugeEnum : __uint128_t 26 { 27 hugezero 28 }; 29 #endif 30 31 template <class T, class U> 32 void test_make_signed() 33 { 34 static_assert((std::is_same<typename std::make_signed<T>::type, U>::value), ""); 35 #if _LIBCPP_STD_VER > 11 36 static_assert((std::is_same<std::make_signed_t<T>, U>::value), ""); 37 #endif 38 } 39 40 int main() 41 { 42 test_make_signed< signed char, signed char >(); 43 test_make_signed< unsigned char, signed char >(); 44 test_make_signed< char, signed char >(); 45 test_make_signed< short, signed short >(); 46 test_make_signed< unsigned short, signed short >(); 47 test_make_signed< int, signed int >(); 48 test_make_signed< unsigned int, signed int >(); 49 test_make_signed< long, signed long >(); 50 test_make_signed< unsigned long, long >(); 51 test_make_signed< long long, signed long long >(); 52 test_make_signed< unsigned long long, signed long long >(); 53 test_make_signed< wchar_t, std::conditional<sizeof(wchar_t) == 4, int, short>::type >(); 54 test_make_signed< const wchar_t, std::conditional<sizeof(wchar_t) == 4, const int, const short>::type >(); 55 test_make_signed< const Enum, const int >(); 56 test_make_signed< BigEnum, std::conditional<sizeof(long) == 4, long long, long>::type >(); 57 #ifndef _LIBCPP_HAS_NO_INT128 58 test_make_signed< __int128_t, __int128_t >(); 59 test_make_signed< __uint128_t, __int128_t >(); 60 # ifndef _LIBCPP_HAS_NO_STRONG_ENUMS 61 test_make_signed< HugeEnum, __int128_t >(); 62 # endif 63 #endif 64 } 65
