[antlr-interest] Nested Tree Construction vs. Recognition

[Terence Parr]

On Jul 5, 2007, at 7:06 AM, Randall R Schulz wrote:

> Hi,
>
> I'm curious about whether it's possible to write tree grammar rules
> whose right-hand-sides (or alternatives thereof) can have nested tree
> node structure.
>
> I can use such nested structures when generating tree content (an AST,
> i.e.). E.g.:
>
> module
>     :   Open CLModule interpretableName
>         ( Open CLExcludes name* Close )?
>         phrase*
>         Close
>     ->  ^( CLModule interpretableName ^( CLExcludes name* )? phrase* )
>     ;

Someone had same problem last week:

http://www.antlr.org:8888/browse/ANTLR-129

Ter