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 16 template <class T, class U> 17 void test_is_nothrow_assignable() 18 { 19 static_assert(( std::is_nothrow_assignable<T, U>::value), ""); 20 } 21 22 template <class T, class U> 23 void test_is_not_nothrow_assignable() 24 { 25 static_assert((!std::is_nothrow_assignable<T, U>::value), ""); 26 } 27 28 struct A 29 { 30 }; 31 32 struct B 33 { 34 void operator=(A); 35 }; 36 37 struct C 38 { 39 void operator=(C&); // not const 40 }; 41 42 int main() 43 { 44 test_is_nothrow_assignable<int&, int&> (); 45 test_is_nothrow_assignable<int&, int> (); 46 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 47 test_is_nothrow_assignable<int&, double> (); 48 #endif 49 50 test_is_not_nothrow_assignable<int, int&> (); 51 test_is_not_nothrow_assignable<int, int> (); 52 test_is_not_nothrow_assignable<B, A> (); 53 test_is_not_nothrow_assignable<A, B> (); 54 test_is_not_nothrow_assignable<C, C&> (); 55 } 56
