[antlr-interest] automatic token type per literal

[Bryan Ewbank]

ANTLR does all that you ask.  Look for "testLiterals" in the
documentation.  It requires that you change your tokens section to be

  tokens {
     FOO="foo";
     ...
  }

Also look at how to import and export token sets; very handy stuff.

Hope this is enough to get you started.  I've gotta run...
- Bryan Ewbank

On 12/1/05, Matt Benson <gudnabrsam at yahoo.com> wrote:
> Let's say I have a grammar having stolen the Java
> IDENT lexer rule.  In my parser, I have the following:
>
> tokens { FOO; }
>
> somerule
>     :    f:"foo"^ { #f.setType(FOO); } BAR
>     ;
>
> Have I missed a feature by means of which I can (once)
> permanently set the association between ttype FOO and
> the literal "foo"?  If not, is there a rationale for
> the absence of such a feature?  If the answer to THAT
> is no, might such a feature find its way into ANTLR3?
> ;)  I tried overriding the ttype in the IDENT lexer
> rule but the ambiguity issues were (at my level of
> expertise) insurmountable.  :)  I'm a longtime lurker
> but still fairly green wrt actually making ANTLR do
> anything...
>
> TIA,
> Matt
>
>
>
>
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