[antlr-interest] A question on Mr. Parr's book--Page 45
Terence Parr
parrt at cs.usfca.edu
Wed Jul 22 17:28:20 PDT 2009
Hi Bryan, you need to define rule expr. :)
Ter
On Jul 22, 2009, at 5:27 PM, Bryan S Follins wrote:
> Chap 3, page 45:
>
> There is a snippet of code that reads:
>
> prog: stat+
>
> stat: expr NEWLINE
> | ID '=' expr NEWLINE
> | NEWLINE
> ;
>
> If I attempt to make a small grammar to test this, like the following:
>
> Grammar P;
>
> prog: stat+
>
> stat: expr NEWLINE
> | ID '=' expr NEWLINE
> | NEWLINE
> ;
>
> Will the grammar work in ANTLR Works? When I try, I get "reference to
> undefined rule: expr." How do I
> correct that error?
>
>
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