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interface AA
{
	routine Meth( a = 0 );
	operator[]( index : int )=>int;
	operator.name()=>string;

	routine __for_iterator__( iter : for_iterator );
	operator[]( iter : for_iterator )=>int;
}
routine Test( o : AA )
{
	io.writeln( 'Test( o : AA )', std.about(o) );
	o.Meth( 123 );
	io.writeln( o[1] );
	io.writeln( o.name );
	for( i in o ) io.writeln(i)
}

class BB
{
	routine Meth( a = 0 ){ io.writeln( a ) }
	operator[]( index : int ){ return index }
	operator.name(){ return 'BB' }

	routine __for_iterator__( iter : for_iterator ){
		iter.valid = 1;
		iter.iterator = 0;
	}
	operator[]( iter : for_iterator ){
		id = (int)iter.iterator;
		iter.valid = id + 1 < 5;
		iter.iterator = id + 1;
		return id;
	}
}
class CC : BB
{
}

bind AA to BB;

Test( BB() );
Test( CC() );

for( i in BB() ) io.writeln(i)