cxx0x-deferred.cxx

// g++ -std=c++0x cxx0x-deferred.cxx
#include <iostream>

template <typename T>
class Deferred {
private:
	T r;
public:
	Deferred() {}
	Deferred(T v) : r(v) {}
	Deferred& next(T(*f)(T)) { r = f(r); return *this; }
	Deferred& loop(unsigned int c, void(*f)(int)) {
		for (unsigned int n = 0; n < c; n++) f(n);
		return *this;
	}
};

int main() {
	Deferred<bool>(true)
		.next([&](bool a){
			std::cout << (a ? "true" : "false") << std::endl;
			return true;
		})
		.loop(3, [&](int n){
			std::cout << n << std::endl;
		});
}