[antlr-interest] Can TokenRewriteStream be applied to rules?

[Indhu Bharathi]

Maybe 'm=variableDeclaration' didn't match anything in the input...


YINGAnnie wrote:
>
>
> Sorry ,Iforgot to mention, Icorrected $m.end.
>
> Now, I am using {tokens.replace($m.start, $m.stop, "something else");}
>
> but I got java.lang.NullPointerException error.
>
> It seems $m is null.
>
>
> Annie
>
>
>
> ------------------------------------------------------------------------
> Date: Wed, 25 Mar 2009 08:40:46 +0530
> From: indhu.b at s7software.com
> To: yimm8369 at hotmail.com
> CC: antlr-interest at antlr.org
> Subject: Re: [antlr-interest] Can TokenRewriteStream be applied to rules?
>
> There was a typo in my mail. It is $m.stop and not $m.end. Sorry :-)
>
> And here is the documentation:
> http://www.antlr.org/api/Java/classorg_1_1antlr_1_1runtime_1_1_parser_rule_return_scope.html
>
> :-)
>
> YINGAnnie wrote:
>
>
>
>     Well, I tried it,but this timethe error is :
>     java.lang.NullPointerException.
>
>     Did I do something wrong?
>
>     Thanks,
>
>
>     Annie
>
>
>
>
>
>     > Date: Wed, 25 Mar 2009 08:22:04 +0530
>     > From: indhu.b at s7software.com <mailto:indhu.b at s7software.com>
>     > To: yimm8369 at hotmail.com <mailto:yimm8369 at hotmail.com>
>     > CC: antlr-interest at antlr.org <mailto:antlr-interest at antlr.org>
>     > Subject: Re: [antlr-interest] Can TokenRewriteStream be applied
>     to rules?
>     >
>     > This will work:
>     >
>     > variableStatement
>     > : VAR? variableDeclaration ( COMMA m=variableDeclaration )* semic
>     > {tokens.replace($m.start, $m.end, "something else");} &n bsp;
>     > ;
>     >
>     > $m will be of type variableDeclaration_ret urn which will be
>     subclass of
>     > 'ParserRuleReturnScope'. $m is not Token.
>     >
>     >
>     > - Indhu
>     >
>     >
>     > YINGAnnie wrote:
>     > > Hi again,
>     > >
>     > > TokenRewriteStream can only replace the declared token, not
>     the rule.
>     > > right?
>     > >
>     > > for example,If I want to replace VAR, it works fine, But if I
>     want to
>     > > replace variableDeclaration , the error said $a can no t be
>     resolved.
>     > >
>     > > variableStatement
>     > > : m= VAR? variableDeclaration ( COMMA variableDeclaration )* semic
>     > > {tokens.replace($m, "something else");}
>     > > ;
>     > >
>     > >
>     > > variableStatement
>     > > : VAR? variableDeclaration ( COMMA m=variableDeclaration )* semic
>     > > {tokens.replace($m, "something else");} &n bsp;
>     > > ;
>     > >
>     > > So how can I replace variableDeclaration ?
>     > >
>     > > Thanks in a dvance.
>     > >
>     > > Annie
>     > >
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