make_array.cc

#include <array>

template <typename T, typename ...Args>
inline std::array<T, sizeof...(Args)> make_array(Args &&...args) {
	return std::array<T, sizeof...(Args)>{ std::forward<Args>(args)... };
}

#define MAKE_ARRAY(T, ...) decltype(make_array<T>(__VA_ARGS__)){__VA_ARGS__}

#include <typeinfo>
#include <iostream>
#include <algorithm>

struct object {
	object(): value(0) { std::cout << "def-ctor\n"; }
	object(int v): value(v) { std::cout << "ctor( " << value << " )\n"; }
	object(object &&o) { std::cout << "move-ctor( " << o.value << " )\n"; value = o.value; o.value = -value; }
	object(const object &o) { std::cout << "copy-ctor( " << o.value << " )\n"; value = o.value; }
	object &operator =(object &&o) { std::cout << "move-assign( " << o.value << " to " << value << " )\n"; value = o.value; o.value = -value; }
	object &operator =(const object &o) { std::cout << "copy-assign( " << o.value << " to " << value << " )\n"; value = o.value;}
	~object() { std::cout << "destructor( " << value << " )\n"; }
	int value;
};

int main() {
	auto a = MAKE_ARRAY(object, object(1), object(2), object(3));
	std::cout << typeid(a).name() << '\n';
	std::for_each(a.begin(), a.end(), [](const object &o) {
		std::cout << o.value << ", ";
	});
	std::cout << '\n';
}