I'm working with a tree parser that is creating ASTs of a custom type. This
CommonTree subclass contains a member named elementType that identifies the
type represented by the tree. How do I set the elementType dynamically within
an action?
I tried in the following way:
id:
^(AST_ID tok+=ID+)
{
$tree.setElementType( typeResolver.resolve(StringUtils.join($tok, ".")) );
}
;
This, however, doesn't work since the tree has not yet been set:
//...
((ElementTypeTree)retval.tree).setElementType(
typeResolver.resolve(StringUtils.join(list_tok, ".")) );
}
retval.tree = (ElementTypeTree)adaptor.rulePostProcessing(root_0);
In this context, I need semantic information in order to resolve the type, so I
can't statically tell ANTLR to create a different tree type (as I do in other
contexts).
Thanks for the suggestions.
--
Kaleb Pederson
Twitter - http://twitter.com/kalebpederson
Blog - http://kalebpederson.com
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