[antlr-interest] Changing the root of a tree in a tree parser

[franck102]

I am trying to do something that seems pretty simple, which is adjusting the
root token of a tree in my tree parser.
Basically my parser always sees a=b as a comparison and generates ^( EQUAL a
b) as an AST, and in the tree parser I want to adjust that to ^( ASSIGN a b)
if I am at the statement level:

statement
    : ifStatement
    | ...
    | expressionStatement { if ($expressionStatement.tree.getType() ==
EQUALS) { <set tree type to ASSIGN> }

If I try to introduce an assignmentStatement (just in the tree parser) I get
mutually recursive rule, so that isn't an option...

Any suggestion?


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