[antlr-interest] Auto-complete using ANTLR v3

[Eric Elliott]

I'm trying to implement a relatively simple auto-complete using ANTLR v3.
Can anyone point me to examples or give a general overview of what is
involved in getting Antlr to give back what tokens are valid at a
particular point in an input?

As a simple example, say I have:

expr:  val ('+' val)*;

val:  '1' | ( 'Sin(' val ')' ) | ( ' Cos(' val ')');

If the user has typed 1, I should be able to present '+'.
if the user has typed 1 +, I should be able to present '1', 'Sin(', or 'Cos('.

Thanks for any input.

-- 
Eric Elliott
eric.elliott at gmail.com