[stringtemplate-interest] howto set separator in parallel list iteration

[Terence Parr]

On Jul 7, 2008, at 1:50 AM, Jens Boeykens wrote:

> I think I solved the bug. In ANTLRv3.g I changed the rule "altList"  
> as follows:
>
> altList
> @init {
>     // must create root manually as it's used by invoked rules in  
> real antlr tool.
>     // leave here to demonstrate use of {...} in rewrite rule
>     // it's really BLOCK[firstToken,"BLOCK"]; set line/col to  
> previous ( or : token.
>     CommonTree blkRoot =  
> (CommonTree)adaptor.create(BLOCK,input.LT(-1),"BLOCK");
> }
>     :   a1=alternative rewrite ( '|' a2=alternative rewrite )*
>         -> ^( {blkRoot} (alternative rewrite)+ EOB["EOB"] )
>     ;
>
> I deleted the question mark after rewrite in the tree rewrite rule.

Actually, that rewrite ? is necessary... if there is no rewrite, you  
will get an exception.
Ter