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  1. struct X;
  2.  
  3. struct F
  4. {
  5.   void Foo( X x= X() );
  6.  
  7.   float f;
  8. };
  9.  
  10. int main(){}
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:5:20: error: invalid use of incomplete type ‘struct X’
   void Foo( X x= X() );
                    ^
prog.cpp:1:8: note: forward declaration of ‘struct X’
 struct X;
        ^
stdout
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Standard output is empty
https://ideone.com/KALp7Q
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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