[antlr-interest] This should be simple, but I can't find the right syntax (or is it a bug?)

[Voelkel, Andy]

Hi,

I'm trying to collect all the StringTemplates created by all instances of one rule (borg) into a StringTemplate for a containing rule (prog). But I can't seem to find the right syntax:

options {
        output = template;
        language = CSharp3;
      tokenVocab=Tree1;
        ASTLabelType = CommonTree;
}

public prog
: (b+=borg)+ -> template(vals = {$b})
<<
{ // prog
  <vals; separator = ",">
}
>> ;

The syntax I tried above is one many approaches I've tried - none seem to work. Antlr3 runs without error but the code won't compile. I hope the intent is clear, as it is a pretty simple example. I've looked back and forth in Terence's book trying to find something like this, and in the examples, but so far I've struck out. It seems like a very common thing to try to do!

One strange thing is that when I look at the generated code, the list for b (list_b) is declared as List<CommonTree>. But Terence's books says is should be List<StringTemplate> when the output type is template. Later in the generated code, when it tries to add to the list, it tries to create a List<StringTemplate>, which seems right, but causes a compiler error. It almost seems like a bug, but I probably just don't understand.

Can anyone help me with this?

- Andy

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