fork download
copy 
  1. #include <functional>
  2. #include <string>
  3.  
  4. enum MaybeType{
  5.   _Nothing,
  6.   _Just
  7. };
  8.  
  9. template<typename T>
  10. class Maybe{
  11.   virtual MaybeType getType() const = 0;
  12. };
  13.  
  14. template<typename T>
  15. class Just : public Maybe<T>{
  16.   T value;
  17.   virtual MaybeType getType() const{
  18.     return MaybeType::_Just;
  19.   }
  20. public:
  21.   Just(T v) : value(v){}
  22. };
  23.  
  24. template<typename T>
  25. class Nothing : public Maybe<T>{
  26.   virtual MaybeType getType() const{
  27.     return MaybeType::_Nothing;
  28.   }
  29. };
  30.  
  31. int main(){
  32.   using namespace std;
  33.   string s = "Hello";
  34.   auto m=Just<string>(s);
  35. }
  36.  
Success #stdin #stdout 0s 3468KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Standard output is empty
https://ideone.com/2gg0bg
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!