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 // is_signed 13 14 #include <type_traits> 15 #include "test_macros.h" 16 17 template <class T> 18 void test_is_signed() 19 { 20 static_assert( std::is_signed<T>::value, ""); 21 static_assert( std::is_signed<const T>::value, ""); 22 static_assert( std::is_signed<volatile T>::value, ""); 23 static_assert( std::is_signed<const volatile T>::value, ""); 24 #if TEST_STD_VER > 14 25 static_assert( std::is_signed_v<T>, ""); 26 static_assert( std::is_signed_v<const T>, ""); 27 static_assert( std::is_signed_v<volatile T>, ""); 28 static_assert( std::is_signed_v<const volatile T>, ""); 29 #endif 30 } 31 32 template <class T> 33 void test_is_not_signed() 34 { 35 static_assert(!std::is_signed<T>::value, ""); 36 static_assert(!std::is_signed<const T>::value, ""); 37 static_assert(!std::is_signed<volatile T>::value, ""); 38 static_assert(!std::is_signed<const volatile T>::value, ""); 39 #if TEST_STD_VER > 14 40 static_assert(!std::is_signed_v<T>, ""); 41 static_assert(!std::is_signed_v<const T>, ""); 42 static_assert(!std::is_signed_v<volatile T>, ""); 43 static_assert(!std::is_signed_v<const volatile T>, ""); 44 #endif 45 } 46 47 class Class 48 { 49 public: 50 ~Class(); 51 }; 52 53 struct A; // incomplete 54 55 int main() 56 { 57 test_is_not_signed<void>(); 58 test_is_not_signed<int&>(); 59 test_is_not_signed<Class>(); 60 test_is_not_signed<int*>(); 61 test_is_not_signed<const int*>(); 62 test_is_not_signed<char[3]>(); 63 test_is_not_signed<char[]>(); 64 test_is_not_signed<bool>(); 65 test_is_not_signed<unsigned>(); 66 test_is_not_signed<A>(); 67 68 test_is_signed<int>(); 69 test_is_signed<double>(); 70 71 #ifndef _LIBCPP_HAS_NO_INT128 72 test_is_signed<__int128_t>(); 73 test_is_not_signed<__uint128_t>(); 74 #endif 75 } 76
