[antlr-interest] zero-or-more or one-or-more in tree grammars

[Mike J. Bell]

I'm having trouble finding examples to show how to handle accumulation of
rule components in a tree parser.

For instance, given a grammar snippet:

big_definition: ^(DEFINITION_TOKEN str=collection) {
System.out.println("definition " + $str.value); };

collection returns [String value]:
    t=thing* { /* insert magic to accumulate all the t's into $value */ };

thing: ...

See what I mean?  When I look at the code generated here, t is assigned
inside the (*) loop, while the /*...*/ comment is placed after the
accumulation.  I need to insert code at the (*).  I don't seem to be able to
get the (ANTLR) grammar right to make this happen.

Any ideas?  Does this happen a lot to you tree parser gurus?  Any wealth of
knowledge besides the ANTLR wiki on tree parsing lore?

Thanks in advance,
Mike

-- 
Mike J. Bell on gmail
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