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  1. #include <iostream>
  2.  
  3. class Fun
  4. {
  5. public:
  6.         explicit Fun(int i): v_(i) {}
  7.  
  8.         void operator()(int j) const 
  9.         { 
  10.                 std::cout << (v_ + j) << "\n"; 
  11.         }
  12.  
  13. private:
  14.         int v_; 
  15. };
  16.  
  17. int main()
  18. {
  19.         int a = 1;
  20.         int b = 2;
  21.  
  22.         Fun(a)(b);   // ERROR: conflicting declaration 'Fun a'
  23.         (Fun(a))(b); // OK: prints 3
  24.         return 0;
  25. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
prog.cpp: In function 'int main()':
prog.cpp:22:16: error: conflicting declaration 'Fun a'
prog.cpp:19:13: error: 'a' has a previous declaration as 'int a'
stdout
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Standard output is empty
https://ideone.com/rQjVj
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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