[antlr-interest] another lookahead issue with TokenStreamRewriteEngine

[Terence Parr]

On Feb 5, 2004, at 9:29 AM, SainTiss wrote:

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> Hi,
>
> In the java.g grammar, I'm trying to parse a list of statements, by 
> repeatedly
> calling a rule statementComplete:
>
> statementComplete:
> 	statement;
>
> A statement, afaik, always ends with SEMI or "}". However, it seems 
> that the
> parser sometimes reads beyond that, probably for lookahead reasons.
> For example, when parsing the following:
>
> Method method = (Method) m;
> final int myInt = 5;
>
> After calling statementComplete once, and then calling the 
> rewriteEngine's
> toOriginalString() method, I get:
>
> "Method method = (Method) m;
> final"
>
> so the newline and "final" have been read as well, even though they 
> obviously
> aren't part of the first statement. Is there a way to get rid of this?
> Preferrably a way to make sure no tokens are read beyond the actual
> statement?

Would adding EOF to the end of statementCOmplete help?

>
> Thanks,
>
> Hans
>
> PS Terence: there are a couple of minor bugs in the 
> TokenStreamRewriteEngine
> as well:
> 1) In a couple of places, "programName" should be passed on to the
> addToSortedRewriteList, but isn't... (e.g. in public void 
> replace(String
> programName, Token from, Token to, String text))
> 2) A delete operation should be defined as replace with text "", not 
> text
> null, because the latter will put the characters n-u-l-l in the 
> string...

Thanks...i'll look at this.

Ter

>
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> Hans Schippers
> 2LIC INF
> UA 2003-2004
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