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  1. #include <iostream>
  2.  
  3. class X {
  4. public:
  5.   explicit operator bool() const {
  6.      return true;
  7.   }
  8. };
  9.  
  10. int main() {
  11.   X x;
  12.  
  13.   if (x) {
  14.     std::cout << x + 100;
  15.   }
  16.  
  17.   return 0;
  18. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin 
Standard input is empty
compilation info 
prog.cpp: In function ‘int main()’:
prog.cpp:14:22: error: no match for ‘operator+’ in ‘x + 100’
prog.cpp:14:22: note: candidate is:
prog.cpp:14:22: note: operator+(int, int) <built-in>
prog.cpp:14:22: note:   no known conversion for argument 1 from ‘X’ to ‘int’
stdout 
Standard output is empty
https://ideone.com/G8VLfy
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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