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_nothrow_assignable 13 14 #include <type_traits> 15 #include "test_macros.h" 16 17 template <class T, class U> 18 void test_is_nothrow_assignable() 19 { 20 static_assert(( std::is_nothrow_assignable<T, U>::value), ""); 21 #if TEST_STD_VER > 14 22 static_assert(( std::is_nothrow_assignable_v<T, U>), ""); 23 #endif 24 } 25 26 template <class T, class U> 27 void test_is_not_nothrow_assignable() 28 { 29 static_assert((!std::is_nothrow_assignable<T, U>::value), ""); 30 #if TEST_STD_VER > 14 31 static_assert((!std::is_nothrow_assignable_v<T, U>), ""); 32 #endif 33 } 34 35 struct A 36 { 37 }; 38 39 struct B 40 { 41 void operator=(A); 42 }; 43 44 struct C 45 { 46 void operator=(C&); // not const 47 }; 48 49 int main() 50 { 51 test_is_nothrow_assignable<int&, int&> (); 52 test_is_nothrow_assignable<int&, int> (); 53 #if TEST_STD_VER >= 11 54 test_is_nothrow_assignable<int&, double> (); 55 #endif 56 57 test_is_not_nothrow_assignable<int, int&> (); 58 test_is_not_nothrow_assignable<int, int> (); 59 test_is_not_nothrow_assignable<B, A> (); 60 test_is_not_nothrow_assignable<A, B> (); 61 test_is_not_nothrow_assignable<C, C&> (); 62 } 63
