fork download

copy

#include <iostream>
#include <functional>
 
template<typename out_t, typename in_t>
struct my_type{
	using F = std::function<out_t(in_t)>;
	F m_f;
	my_type(F f) : m_f(f) {}
};
 
class C{
public:
	my_type<double,double> m_func_taker;
 
	double func(double in) { 
		return 2*in; 
	}
 
	C() : m_func_taker(std::function<double(double)>(func) ) {}
 
 
};
 
 
int main() {
	// your code goes here
	return 0;
}

prog.cpp: In constructor ‘C::C()’:
prog.cpp:19:55: error: invalid use of non-static member function ‘double C::func(double)’
  C() : m_func_taker(std::function<double(double)>(func) ) {}
                                                       ^
prog.cpp:15:9: note: declared here
  double func(double in) {
         ^~~~

Standard output is empty