DeferredCall

DeferredCall.cc

#include <memory>
#include <functional>
#include <exception>

class DeferredCall
{
public:

	DeferredCall(std::function<void()> callable)
		: callable{std::move(callable)}
	{
	}

	~DeferredCall()
	{
		if(callable)
		{
			try
			{
				callable();
			}
			catch(const std::exception&)
			{
			}
		}
	}

	void Cancel()
	{
		callable = decltype(callable){};
	}

private:

	std::function<void()> callable;
};

// example

#include <iostream>

void foo()
{
	std::cout << "foo" << std::endl;
}

void bar(int x)
{
	std::cout << "bar(" << x << ")" << std::endl;
}

int main(int argc, char* argv[])
{
	DeferredCall deferredFoo(foo);
	DeferredCall deferredBar1([]{bar(1);});
	DeferredCall deferredBar42([]{bar(42);});

	deferredBar1.Cancel();
}