The `?` symbol

Property definitions

	# The `?` symbol
	var n_quest: TQuest is writable, noinit

src/parser/parser_nodes.nit:2794,2--2795,40

	redef fun n_quest=(node)
	do
		_n_quest = node
		node.parent = self
	end

src/parser/parser_prod.nit:7439,2--7443,4