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  1. #include <iostream>
  2. #include <vector>
  3. #include <functional>
  4.  
  5. template<typename ReturnType, typename... Args>
  6. class Signal {
  7.     std::vector<std::function<ReturnType(Args...)>> function;
  8. public:
  9.     template<typename... Args2>
  10.     ReturnType operator()(Args2&&... args2) {
  11.         ReturnType ret;
  12.         for (auto& func : function)
  13.             ret = func(std::forward<Args2>(args2)...);
  14.         return ret;
  15.     }
  16.  
  17.     template<typename Func>
  18.     void func(Func const &func) {
  19.         function.push_back(std::function<ReturnType(Args...)>(func));
  20.     }
  21.  
  22.     template<typename Class, typename Instance>
  23.     void mfunc(ReturnType(Class::*func)(Args...), Instance &instance) {
  24.         function.push_back([&instance, func](Args&&... args) { 
  25.         	return (instance.*func)(std::forward<Args>(args)...); 
  26.         });
  27.     }
  28.  
  29. };
  30.  
  31. struct foo {
  32. 	int bar(int i, double d) { std::cout << i << ' ' << d; return 0; }
  33. };
  34.  
  35. int main()
  36. {
  37.     Signal<int, int, double> sig;
  38.     foo f;
  39.     sig.mfunc(&foo::bar, f);
  40.     sig(5, 3.);
  41. }
Success #stdin #stdout 0s 15240KB
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https://ideone.com/gjPdWN
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
secret

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