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  1. template<typename T>
  2. class F { 
  3.   T f;
  4. public:
  5.   F(T t) : f(t)
  6.   {}  
  7.  
  8.   T& operator()(){
  9.     return f;
  10.   }
  11. };
  12.  
  13. #define DECLARE_F(VARIABLE, LAMBDA) \
  14.   auto lambda = LAMBDA; \
  15.   F<decltype(lambda)> VARIABLE(lambda)
  16.  
  17. int main()
  18. {
  19.     int x = 5;
  20.     DECLARE_F(f, [x](int a, int b){return a+b;});
  21.     return 0;
  22. }
  23.  
Success #stdin #stdout 0s 3408KB
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https://ideone.com/liDBor
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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