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

	routine for( iter: tuple<bool,int> );
	routine []( iter: tuple<bool,int> )=>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(var i in o ) io.writeln(i)
}

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

	routine for( iter: tuple<bool,int> ){
		iter[0] = true;
		iter[1] = 0;
	}
	routine []( iter: tuple<bool,int> ){
		var id = iter[1];
		iter[0] = iter[1] + 1 < 5;
		iter[1] += 1;
		return id;
	}
}
class CC : BB
{
}


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

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