| // DR1760: "no additional copy and destruction is performed" | |
| // { dg-do run { target c++14 } } | |
| #include <cassert> | |
| int copy_count = 0; | |
| int dtor_count = 0; | |
| struct X | |
| { | |
| X() = default; | |
| X(const X&) { ++copy_count; } | |
| ~X() { ++dtor_count; } | |
| }; | |
| int main() | |
| { | |
| { | |
| X x; | |
| auto z = [y = x](){}; | |
| X x2; | |
| auto z2 = [x2](){}; | |
| assert(copy_count == 2); | |
| } | |
| assert(dtor_count == 4); | |
| } |