At 22:59 17/09/2009, Gavin Lambert wrote:
>
> Match the tree and skip the statements:
>
> conditionalifthen:
> ^(IF expression ( { $expression.value != 0 }?
> => ^(THEN statements) | ^(THEN .*)));
>
> conditionalifthenelse:
> ^(IFELSE expression
> ( { $expression.value != 0 }? => ^(THEN
> statements) ^(ELSE .*) |
> ^(THEN .*)
> ^(ELSE statements) ));
OK. I've tried this code, but both ANTLR 3.1.2 and 3.1.3 generate a faulty
tree parser, as they don't declare a "expression" variable in the
corresponding specialStateTransition function.
I think this is a bug. How can I report it?
But, finally, for the record, I have a functional solution.
First of all, I have defined a new private member for the Tree Parser class.
@members {
...
private boolean lastCondExp = false;
...
}
And I use it for save the last conditional expression:
conditionalifthen:
^(IF expression {lastCondExp = ($expression.value!=0);}
( {lastCondExp}? => ^(THEN statements) |
^(THEN .*)));
conditionalifthenelse:
^(IFELSE expression {lastCondExp = ($expression.value!=0);}
( { lastCondExp }? => ^(THEN statements) ^(ELSE .*) |
^(THEN .*) ^(ELSE statements) ));
Thanks all for your help!
--
David Marín Carreño
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