[antlr-interest] Comments / White-Space and All The Rest
Terence Parr
parrt at cs.usfca.edu
Fri Nov 24 12:07:41 PST 2006
forAnnotated
: f='fof' ...
{if ( input.get($f.index-1).getType()==DOC_COMMENT ) {...} }
...
;
In reality you would need a for loop to look backwards so that it
avoided whitespace, unless of course you use skip on those tokens in
the lexer.
Ter
On Nov 24, 2006, at 11:57 AM, Randall R Schulz wrote:
> Hi,
>
> Here are the top-level rules for which I'd like to record
> intervening comments:
>
> fofAnnotated
> : 'fof'
> '('
> name
> ',' formulaRole
> ',' firstOrderFormula
> ( ',' annotations ) ?
> ')'
> Period
> {
> acceptFOF($firstOrderFormula.fof, $name.n,
> $formulaRole.role);
> }
> ;
>
>
> cnfAnnotated
> : 'cnf'
> '('
> name
> ',' formulaRole
> ',' clausalFormula
> ( ',' annotations ) ?
> ')'
> Period
> {
> acceptCNF($clausalFormula.cf, $name.n, $formulaRole.role);
> }
> ;
>
>
> How would I modify them to get at the 'fof' or 'cnf' keyword token
> so I
> can work backward and find any interstitial comments?
>
>
> Thanks.
>
> Randall Schulz
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