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  1. #include <iostream>
  2. #include <typeinfo>
  3.  
  4. using namespace std;
  5.  
  6. //if(flag) -> int foo(bool);
  7. //else     -> double foo(bool);
  8.  
  9. auto foo(bool flag) ->decltype(flag ? 1 : 1.0)
  10. {
  11.     if(flag)    return 1;
  12.     else        return 1.0;
  13. }
  14.  
  15. int main()
  16. {
  17.     std::cout << typeid(foo(true)).name() << std::endl;
  18.     std::cout << typeid(foo(false)).name() << std::endl;
  19.     return 0;
  20. }
  21.  
Success #stdin #stdout 0s 3460KB
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d
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https://ideone.com/98BqSW
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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