Get cost of a link

Property definitions

	# Get cost of a link
	fun cost(link: L): Int is abstract

lib/a_star/a_star.nit:346,2--347,35

	redef fun cost(l) do return 1

lib/a_star/a_star.nit:370,2--30

	redef fun cost(l) do
		return l.weight
	end

lib/a_star/a_star.nit:397,2--399,4

	redef fun cost(link) do return link.from.dist_with(link.to)

lib/a_star/tests/test_a_star.nit:289,2--60