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  1.  
  2. struct Object {
  3.     int& x() & { return x_; }
  4. private:
  5.     int x_;
  6. };
  7.  
  8. int main() {
  9.     int x = Object().x();
  10. }
  11.  
  12.  
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.cpp: In function ‘int main()’:
prog.cpp:9:24: error: passing ‘Object’ as ‘this’ argument discards qualifiers [-fpermissive]
     int x = Object().x();
                        ^
prog.cpp:3:10: note:   in call to ‘int& Object::x() &’
     int& x() & { return x_; }
          ^
stdout
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Standard output is empty
https://ideone.com/UuZYJe
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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