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  1.  
  2. #include <string>
  3. #include <iostream>
  4. class foo {
  5. };
  6.  
  7. class bar {
  8.     public:
  9.         const foo & to_foo() const {
  10.             return f;
  11.         }
  12.  
  13.         foo & to_foo() {
  14.             return f;
  15.         }
  16.     private:
  17.         foo f;
  18. };
  19.  
  20. template< typename T, typename Enable = void>
  21. class convert {};
  22.  
  23. template< typename T>
  24. struct convert<T>{
  25.     static const foo & call1( const bar & b ) {
  26.         std::cout<<"call1"<<std::endl;
  27.         return b.to_foo();
  28.     }
  29.  
  30.     static foo & call2( bar & b ) {
  31.         std::cout<<"call2"<<std::endl;
  32.         return b.to_foo();
  33.     }
  34. };
  35. int main()
  36. {
  37.     bar b;
  38.     const bar cb = b;
  39.     convert<std::string> converter;
  40.     converter.call1(cb);
  41.     converter.call2(b);
  42.  
  43.     return 0;
  44. }
  45.  
Success #stdin #stdout 0.01s 2724KB
comments (?)
stdin 
Standard input is empty
stdout 
call1
call2
https://ideone.com/KzasX
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
public

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