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  1. #include <iostream>
  2. struct Bar {
  3.     int n;
  4.     Bar(int v) : n(v) {
  5.             std::cout << "Bar " << n << " constructed\n";
  6.     }
  7.     Bar& operator=(const Bar& other) {
  8.         std::cout << "Bar " << n << " assigned from " << other.n << "\n";
  9.         n = other.n;
  10.         return *this;
  11.     }
  12. };
  13. struct Foo
  14. {
  15.    Bar a;
  16.    Bar b;
  17.  
  18.    Foo(Bar c, Bar d) : a(b = c), b(d) { }
  19. };
  20.  
  21. int main()
  22. {
  23.         Foo f(Bar(1), Bar(2));
  24. }
  25.  
stdin 
Standard input is empty
compilation info 
prog.cpp: In function ‘int main()’:
prog.cpp:8: warning: ‘f.Foo::b.Bar::n’ is used uninitialized in this function
prog.cpp:23: note: ‘f.Foo::b.Bar::n’ was declared here
stdout 
Bar 2 constructed
Bar 1 constructed
Bar 0 assigned from 1
https://ideone.com/VDZzG
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
public

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