[antlr-interest] grammar question

[mzukowski at yci.com]

Use (a | b | c)+ and then write an action that checks to make sure that you
have exactly one of each.  There is no real "antlr" way of doing this.

Monty

-----Original Message-----
From: Matt Benson [mailto:gudnabrsam at yahoo.com]
Sent: Friday, March 21, 2003 2:57 PM
To: Antlr List
Subject: [antlr-interest] grammar question


If I have a rule that wants one of each of three
subrules matched, is there any shorthand to require
this without imposing order?  The following would be
the long version, I suppose:

top
  : a b c
  | b c a
  | c a b
  | c b a
  | a c b
  | b a c
  ;

-Matt

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