sk::lazy

sk::lazy<T> wraps a callable that returns T and caches the result after the first call.

Sample usage

extern int slow_function();

int main() {
	sk::lazy<int> lz(slow_function);

	// Call slow_function() and cache the result.
	std::cout << "the result of slow_function is " << lz.get() << '\n';

	// This call will be fast because the result is cached.
	std::cout << "the result of slow_function is still " << lz.get() << '\n';
}