[antlr-interest] Language Design Patterns Section 12.5 Problem

[Jan Nielsen]

It appears to be this issue:

  http://www.antlr.org/jira/browse/ANTLR-374

This issue is marked as resolved in 3.1.4 - but 3.1.4 has not been
released yet. And, unfortunately, it does not look like a
3.1.4-SNAPSHOT build is available from Hudson:

  http://antlr.org/hudson/

The ANTLR FishEye tar-ball, as of this morning, unfortunately does not
build, either, so it looks like I'm stuck at this point, unless
someone has an idea?


Thanks,

Jan



On Mon, Aug 31, 2009 at 11:24 PM, Jan
Nielsen<jan.sture.nielsen at gmail.com> wrote:
> I'm not sure if this is the right forum to discuss a little problem I
> encountered in section 12.5 of Language Design Patterns (B6.0), but
> I'm sure this is the most likely spot for some help...I got the
> following:
>
>  java -cp antlr-3.1.3.jar org.antlr.Tool Cymbol.g Gen.g
>  warning(200): Cymbol.g:94:45: Decision can match input such as
> "'else'" using multiple alternatives: 1, 2
>  As a result, alternative(s) 2 were disabled for that input
>  error(100): :1:1: syntax error: antlr: Gen.g:1:1: unexpected token: operator
>  error(10):  internal error: Exception java.lang.ClassCastException:
> antlr.CommonToken cannot be cast to
> antlr.TokenWithIndex at antlr.TokenStreamRewriteEngine.next
>  Token(TokenStreamRewriteEngine.java:161): can't parse template action
>
>  error(100): Gen.g:0:0: syntax error: codegen: <AST>:0:0: unexpected
> end of subtree
>
> Per the eBook, I'm expecting the warning(200) but the errors end up
> causing the generated Gen.java to break:
>
>  Gen.java:1851: illegal start of expression
>              retval.st = ;
>                          ^
>  1 error
>
> Any thoughts from those of you who have paid for the EA eBook (or
> written it :-)?
>
>
> Thanks,
>
> Jan
>