[antlr-interest] Formula Parser once again
Stritzel.Nils at infineon.com
Stritzel.Nils at infineon.com
Wed Apr 19 18:35:27 PDT 2006
Thanks this helped:
functionCall : CABS^ LPAREN! batchExpr RPAREN!
Actually there was another error, a spelling mistake (had LPARENT
instead of LPAREN)
Thanks,
Nils
-----Original Message-----
From: John B. Brodie [mailto:jbb at acm.org]
Sent: Wednesday, April 19, 2006 8:56 PM
To: Nils Stritzel (IFIS DC)
Subject: Re: [antlr-interest] Formula Parser once again
You asked about parsing a function call.
You have:
functionCall : CSIGN^ LPARENT^ batchExpr RPARENT!
;
in your parser, but CSIGN isn't defined anywhere. Your lexer produces a
CABS token and your treewalker is expecting a CABS batchExpr node. Maybe
CSIGN should be CABS?
Also (but I am not very familiar with trees) you have two consecutive ^
operators in your functionCall rule - doesn't that mean that the root of
the tree will be the *last* ^ seen (e.g. the LPARENT and not the CSIGN,
er CABS)?
So maybe:
functionCall : CABS^ LPARENT! batchExpr RPARENT!
;
Hope this helps...
-jbb
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