Hi,
I've started using antlr a few days ago, so let me begin by thanking
everyone that contributed for creating this fantastic project.
Unfortunately, I think I ran into a bug and I'm hoping you might help me.
I'm using a tree grammar where I have the following rule:
expr returns [Expr value]
| ID { $value = new
Var($ID.text); }
| ^(APP fn=expr (args+=expr)+ { $value = new App($fn.value, $args); }
...
Surprisingly, $args is a list of CommonTrees, and not a list of Expr
as I was hoping it would be. Is this a bug or a feature? If it's the
latter, is there any way to "convert" the tree into an Expr?
For now, I'm collecting args manually, with the following workaround:
expr returns [Expr value]
@init {
List<Expr> ops = new ArrayList<Expr>();
}
| ^(APP fn=expr (op=expr { ops.add($op.value); })+) { ... }
| ID
{ ... }
Thanks!
Luís Pureza
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