# Simple context with constant cost on each links
# Warning: A* is not optimize for such a case
class ConstantPathContext
	super PathContext
	serialize

	redef fun worst_cost do return 1
	redef fun cost(l) do return 1
	redef fun is_blocked(l) do return false
	redef fun heuristic_cost(a, b) do return 0
	redef fun worst_heuristic_cost do return 0
end