The `catch` keyword

Property definitions

	# The `catch` keyword
	var n_kwcatch: nullable TKwcatch = null is writable

src/parser/parser_nodes.nit:1950,2--1951,52

	redef fun n_kwcatch=(node)
	do
		_n_kwcatch = node
		if node != null then node.parent = self
	end

src/parser/parser_prod.nit:2992,2--2996,4