- struct Foo 
- { 
-     int x, y; 
-   
-     Foo() = default; 
-     Foo& operator=(const Foo&) = delete; 
- }; 
-   
- int main() 
- { 
-     Foo f1 {1, 2}; 
-     Foo f2 = {1, 2}; 
- } 
-   
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