bind_first

main.cpp

#include <iostream>
#include <utility>

#define RESOLVE_OVERLOAD(...) \
	[](auto&&...args)->decltype(auto){return __VA_ARGS__(std::forward<decltype(args)>(args)...);}

template<typename Fun, typename Arg>
auto bind_first(Fun f, Arg&& arg1) {
	return [arg1 = std::forward<Arg>(arg1), f](auto&&... args) -> decltype(auto){
		return f(arg1, std::forward<decltype(args)>(args)...);
	};
}

void print_all(){}
template<typename Head, typename... Tail>
void print_all(const Head& h, const Tail&... tail) {
	std::cout << h;
	print_all(tail...);
}

int main() {
	auto f23 = bind_first(bind_first(RESOLVE_OVERLOAD(print_all), 2), '3');
	f23();
	f23('\n');
}