The expression used as the collection to iterate on

Property definitions

	# The expression used as the collection to iterate on
	var n_expr: AExpr is writable, noinit

src/parser/parser_nodes.nit:2064,2--2065,38

	redef fun n_expr=(node)
	do
		_n_expr = node
		node.parent = self
	end

src/parser/parser_prod.nit:8035,2--8039,4