How do I get a wildcard to match a complete subtree? For example... (DECL name
(ARRAY (TYPE float) 9))
Currently I can only get the wild card to match any flat node like: (DECL name
float 9).
Here are my tree pattern match rules...
expand_array_declaration
: ^(VDECL ty=. ^(IADECL id=. bnds=.))
-> ^(VDECL ^(ARRAY $ty $bnds) $id)
;
expand_array_declarations
: ^(VDECL ty=. (^(IADECL id+=. bnds+=.))+)
-> ^(VDECLS ^(VDECL ^(ARRAY $ty $bnds) $id)+)
;
expand_scalar_declaration
: ^(VDECL ty=. ^(ISDECL id=.))
-> ^(VDECL $ty $id)
;
expand_scalar_declarations
: ^(VDECL ty=. (^(ISDECL id+=.))+)
-> ^(VDECLS ^(VDECL $ty $id)+)
;
Also, as you can see, I have to versions that seem to account for a limitation
(bug?) in the rewriting that only allows you to replace a node with a single
node. What these rules are doing is expanding type declarations so they are
unified (e.g. float a, b[4], c, d[5]; -> float a; float[4] b; float c; float[5]
d;). So I need to replace one child with many. Simplified version would be:
(VDECL type id+) -> (VDECL type id) (VDECL type id) (VDECL type id). Currently
I have to do it in two separate rules and then I am guessing I will need a
second pass to gather all the VDECLS + VDECL and flatten them out. Am I missing
something obvious? Can (or should I be able to) replace on node with many?
Any help on these two issues is much appreciated.
Thanks,
Kevin
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