[antlr-interest] Filtering peer nodes in a tree

[J. Stephen Riley Silber]

Hi gang,

I'm having a bit of trouble with a tree filter.  I'm trying to take ASSIGN trees like this:

^( ASSIGN ID expr )

and merge them together whenever they are adjacent to each other in a tree under a BLOCK node.  So, bigger example:

^( BLOCK
    ^( foo ... )
    ^( ASSIGN ID expr )
    ^( ASSIGN ID expr )
    ^( bar ... )
 )

would become

^( BLOCK
    ^( foo ... )
    ^( ASSIGN ID expr ID expr )
    ^( bar ... )
 )

I tried using a rule like ^( BLOCK .* ASSIGN ASSIGN .* ), but that didn't seem to work.

Any suggestions?

--S
    
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