cpp_scope_guards.cpp

cpp_scope_guards.cpp

#include <iostream>

// https://github.com/ricab/scope_guard
#include "scope_guard.hpp"

int main (int argc, char** argv)
{
	std::cout << "enter main" << std::endl;

	std::cout << "open something" << std::endl;
	auto something_guard = sg::make_scope_guard([]{
		std::cout << "close something" << std::endl;
	});

	{
		std::cout << "opening some file" << std::endl;
		auto file_guard = sg::make_scope_guard([]{
			std::cout << "closing the file" << std::endl;
		});

		// return 1; // the file and "something" is cleaned up

		std::cout << "work with the file" << std::endl;
		std::cout << "end of the block" << std::endl;
	} // the file is closed here

	// return 2; // "something" is cleaned up

	std::cout << "open something else" << std::endl;
	auto something_else_guard = sg::make_scope_guard([]{
		std::cout << "close something else" << std::endl;
	});

	return 0;  // "something" and "something else" is cleaned up here
}