[antlr-interest] Tree Rewrite Rule Problem
DJBall05 at hotmail.co.uk
Tue Nov 6 07:33:22 PST 2012
I'm trying to convert this tree...
...into this tree...
I'm using a Tree Grammar with pattern matching and this is the rule I've
*findInfix : ^(MROW (lefts=.*) left=. MO right=. (rights=.*)) -> ^(MROW
$lefts* ^(MO $left $right) $rights*);*
In the tree *+* is represented by the *MO* token.
On running the tree grammar rewriter I get the following rewrite...
*(mrow (mi a) + (mi b) + (mi c)) -> (mrow + (+ (mi b) (mi c)))*
I don't know which part of my rule is wrong, because it is leaving out the
'lefts' part of the tree in the rewrite.
Here is a Eclipse project showing the erroneous rewrite...
Thanks for any help.
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