on_heap_creator

main.cpp

#include <iostream>
#include <utility>

struct foobar{
	std::string value = "fooabarbazquux";
	foobar() = default;
	
	foobar(const foobar& other): value{other.value} {
		std::cout << "foobar(const foobar&)\n";
	}
	foobar(foobar&& other): value{std::move(other.value)} {
		std::cout << "foobar(foobar&&)\n";
	}
	
	foobar clone() {
		return *this;
	}
};


template<typename Function, typename Object, typename...Arguments>
auto on_heap_creator(Function f, Object& o, Arguments&&... args...) -> decltype((o.*f)(args...))* {
	using Returntype = decltype((o.*f)(args...));
	return new Returntype{std::move((o.*f)(args...))};
}


int main() {
	foobar baz;
	std::cout << "=========================================\n";
	baz.clone();
	std::cout << "=========================================\n";
	auto x = on_heap_creator(&foobar::clone, baz);
	std::cout << "=========================================\n";
	delete x;
}

Output:

=========================================
foobar(const foobar&)
=========================================
foobar(const foobar&)
foobar(foobar&&)
=========================================