# A pipeline of comparators executed in inclusion order
#
# This class is used internally to agregate the behaviors of multiple comparators.
# Use `IndexMatches::sort(comparator...)` instead.
private class MatchComparators
	super ScoreComparator

	# Comparator to use in the array order
	var comparators: Array[ScoreComparator]

	# Compare with each comparator
	#
	# Return the compare value of the first one to return anything else than 0.
	redef fun compare(o1, o2) do
		for comparator in comparators do
			var c = comparator.compare(o1, o2)
			if c != 0 then return c
		end
		return 0
	end
end