#ifndef COPY_IFH
#define COPY_IFH

template <class INPUT, class OUTPUT, class PREDICATE>
OUTPUT copy_if(INPUT first, INPUT last, OUTPUT result, PREDICATE predicate)
{
	for (; first != last; ++first) {
		if (predicate(*first)) {
			*result = *first;
			++result;
		}
	}

	return result;
}
#endif