Property definitions

nitc :: parser_prod $ APercentAssignOp :: init_apercentassignop
	init init_apercentassignop (
		n_op: nullable TPercenteq
	)
	do
		_n_op = n_op.as(not null)
		n_op.parent = self
	end
src/parser/parser_prod.nit:7801,2--7807,4