arielqw

git remote add bgu http://www.cs.bgu.ac.il/~os152/xv6.git
git fetch bgu
git diff master bgu/master > ID1_ID2.patch

arielqw

If you have:

MyThings ::= { thing [X] ,}

[ meaning MyThings can be an empty list or a list of one or more Thing separated by comma ] 

Then you can write the following grammer :

MyThings  ::=	{ ThingsList:things }	{: 		RESULT = new MyThings(things);			:}
	    |	{ } 		   	{: 		RESULT = new MyThings( new ThingsList() );	:}