# Module metric: proportion of abstract, concrete and extern Class Inherited From
#
# Count classes that have at least a child
class MIFC
	super MModuleMetric
	super FloatMetric
	redef fun name do return "mifc"
	redef fun desc do return "proportion of class_kind inherited from"

	redef fun collect(mmodules) do
		for mmodule in mmodules do
			var count = 0
			var nb = 0
			for mclass in mmodule.intro_mclasses do
				if mclass.kind == abstract_kind or mclass.kind == concrete_kind or mclass.kind == extern_kind then
					if mclass.in_hierarchy(mainmodule).direct_smallers.length > 0 then count += 1
				end
				nb += 1
			end
			if mmodule.intro_mclasses.is_empty then
				values[mmodule] = 0.0
			else
				values[mmodule] = count.to_f / nb.to_f
			end
		end
	end
end