[antlr-interest] RewriteEmptyStreamException when changing from quoted string to token?

[Jon Schewe]

David Holroyd wrote:
> I suspect RewriteEmptyStreamException is the result when the rewrite
> tries to insert one of the captured PRODUCTs, but the parse didn't
> capture one (because there was an 'atom' with no '*', I guess).
>
>
> Here's another idea that I didn't test :)
>
>   multExpr[boolean negate]
>     :   a+=atom (a+=multHelp)* -> {negate}? ^(PRODUCT ^(NUMBER DOUBLE["-1"]) $a)
>                                ->           ^(PRODUCT $a)
>     ;
>
>   multHelp
>     :   PRODUCT atom -> atom
>
>
>   
Thanks, that took care of it.  Now on to debugging other parts of the 
parser.

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