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  1. 	#include <iostream>
  2. 	#include <string>
  3.  
  4.     template< typename T >
  5.     class Invoker
  6.     {
  7.     public:
  8.         Invoker() = default;
  9.         virtual ~Invoker() = default;
  10.  
  11.     public:
  12.         template <typename R, typename ... Args1, typename ... Args2>
  13.         static R invoke( T* object, R( T::* method )( Args1... ), Args2&&... args );
  14.     };
  15.  
  16.     template <typename T>
  17.     template <typename R, typename ... Args1, typename ... Args2>
  18.     R Invoker<T>::invoke(T* object, R( T::* method)(Args1...), Args2&&... args)
  19.     {
  20.         return ( object->*method )( std::forward<Args1>( args )... );
  21.     }
  22.  
  23.  
  24.     struct Foo
  25.     {
  26.     	int bar( const std::string& txt )
  27.     	{
  28.     		return 42;
  29.     	}
  30.     };
  31.  
  32.     int main()
  33.     {
  34.     	Foo foo;
  35.  
  36.     	auto result = Invoker<Foo>::invoke( &foo, &Foo::bar, std::string() );
  37.     	std::cout << result;	// 42
  38.  
  39.     	return 0;
  40.     }
Success #stdin #stdout 0s 3412KB
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Standard input is empty
stdout
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42
https://ideone.com/cQEMM4
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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