1 // I, Howard Hinnant, hereby place this code in the public domain. 2 3 // Test that move constructor and move assignement are special. 4 // That is, their presence should cause compiler declared 5 // copy ctor or assignment to be deleted. 6 7 // { dg-do compile { target c++11 } } 8 9 #include <assert.h> 10 11 template <bool> struct sa; 12 template <> struct sa<true> {}; 13 14 struct one {char x[1];}; 15 struct two {char x[2];}; 16 17 int copy = 0; 18 int assign = 0; 19 20 struct base 21 { 22 base() {} 23 base(const base&) {++copy;} 24 base& operator=(const base&) {++assign; return *this;} 25 }; 26 27 struct derived // { dg-message "declares a move" } 28 : base 29 { 30 derived() {} 31 derived(derived&&) {} 32 derived& operator=(derived&&) {return *this;} 33 }; 34 35 int test1() 36 { 37 derived d; 38 derived d2(static_cast<derived&&>(d)); // should not call base::(const base&) 39 assert(copy == 0); 40 derived d3(d); // { dg-error "deleted" } 41 assert(copy == 1); 42 d2 = static_cast<derived&&>(d); // should not call base::operator= 43 assert(assign == 0); 44 d3 = d; // { dg-error "deleted" } 45 assert(assign == 1); 46 return 0; 47 } 48 49 int main() 50 { 51 return test1(); 52 } 53