#!/usr/local/bin/rune
#
#	Demonstrate an interface (multiple inheritance)

import "sys" as self;
import "stdio";

alias stdio.File *stdout = stdio.stdout;

# sample class
#

class HashableListNode {
	interface ListNode lnode;
	interface HashNode hnode;
}

class HashableList {
	int a;
	int b;

	# An 'interface' combines a named declaration with an unnamed subclass
	# definition and also allows a pointer to our class (HashableList)
	# to be cast to a pointer to the subclass (list in this case).
	#
	interface List list {
		refine method
		void addTail(HashableListNode @node)
		{
			super.addTail(node);
			hash.super.addHash(node);
		}
		...
	}
	interface Hash hash {
		refine method void
		addHash(HashableListNode @node)
		{
			super.addHash(node);
			list.super.addTail(node);
		}
	}
}