[stringtemplate-interest] howto set separator in parallel list iteration

[Jens Boeykens]

Hello!

I have a problem with iterating parallel lists. I use antlr together with
stringtemplate to generate templates. My antlr code looks like this:

altList
    :   ^( (a+=alternative r+=rewrite)+ )
      ->altList(alternative={$a}, rewrite = {$r})
;


my stringtemplate:

altList(alternative, rewrite) ::= <<
<alternative,rewrite: {alt,rw | <alt> <rw>}>
>>



This gives
input :            INT -> test (a = {$int}) | CHAR -> test (a = {$int})
output:           INT -> test (a = {$int}) CHAR -> test (a = {$int})

So parallel iterating works, but the separator '|' is missing in the output
(before CHAR).

What should I change in my template so I can add a separator.
Something like <alternative,rewrite: {alt,rw | <alt> <rw> | }> or
<alternative,rewrite: {alt,rw | <alt> <rw>; separator=" | "}>
doesn't work...

Thanks!
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