On Mon, Oct 24, 2011 at 10:41 AM, Dieter Habelitz <
dieter.habel...@habelitz.com> wrote:
> Hi folks,
>
> When feeding ANTLR 3.4 with my Java grammars it doesn't generate valid
> Java sources (26 compiler errors) - with v3.3 everything is okay.
>
> Here's a snipped of the grammar that raises one of the problems:
>
> statement
> : block
> | assertStatement
> | ifStatement
> | forStatement
> | [... and so on ...]
> ;
>
> ifStatement
> : IF parenthesizedExpression ifStat=statement
> ( ELSE elseStat=statement -> ^(IF parenthesizedExpression $ifStat
> $elseStat)
> | -> ^(IF parenthesizedExpression $ifStat)
> )
> ;
>
> Amongst other things v3.4 generates the following code for the 'ELSE'
> branch
> of the rule 'ifStatement' (have a look at the local 'variable
> declaration': void =null;):
>
> public final void synpred137_Java_fragment() throws RecognitionException
> {
> void =null;
>
> // [... some comments not relevant here ...]
> {
> match(input,ELSE,FOLLOW_ELSE_in_synpred137_Java9244); if
> (state.failed) return ;
>
> pushFollow(FOLLOW_statement_in_synpred137_Java9248);
> elseStat=statement();
>
> state._fsp--;
> if (state.failed) return ;
>
> }
>
> }
>
> However, v3.3 generates the following code from the same grammar:
>
> public final void synpred137_Java_fragment() throws RecognitionException
> {
> JavaParser.statement_return elseStat = null;
>
>
> // [... some comments not relevant here ...]
> {
> match(input,ELSE,FOLLOW_ELSE_in_synpred137_Java9244); if
> (state.failed) return ;
> pushFollow(FOLLOW_statement_in_synpred137_Java9248);
> elseStat=statement();
>
> state._fsp--;
> if (state.failed) return ;
>
> }
> }
>
> The complete grammars can be found at ...
>
> http://www.habelitz.com/index.php?option=com_content&task=view&id=12&Itemid=8
>
> Any hints? Switch back to org.antlr.Tool 3.3
> A bug within v3.4? Yes
>
Ter is aware of it but is holding off on fixing the bugs for org.antlr.Tool
3.4.
>
> Ciao
> Dieter
>
>
> List: http://www.antlr.org/mailman/listinfo/antlr-interest
> Unsubscribe:
> http://www.antlr.org/mailman/options/antlr-interest/your-email-address
>
List: http://www.antlr.org/mailman/listinfo/antlr-interest
Unsubscribe:
http://www.antlr.org/mailman/options/antlr-interest/your-email-address
--
You received this message because you are subscribed to the Google Groups
"il-antlr-interest" group.
To post to this group, send email to il-antlr-inter...@googlegroups.com.
To unsubscribe from this group, send email to
il-antlr-interest+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/il-antlr-interest?hl=en.
