The `as` keyword.

Property definitions

	# The `as` keyword.
	var n_kwas: TKwas is writable, noinit

src/parser/parser_nodes.nit:1579,2--1580,38

	redef fun n_kwas=(node)
	do
		_n_kwas = node
		node.parent = self
	end

src/parser/parser_prod.nit:8451,2--8455,4