I want to parse recipes. How can I distinguish (for instance) between a
measuring unit such as "cups" and other general words?
If I do
WORD:
LETTER+;
UNIT:
"cups";
the lexer will emit WORD for "cups" as well at least that's what I see
happening. I tried
WORD:
u=UNIT {
$u.setType(UNIT);
emit($u);
} | LETTER+;
but that causes an error saying that UNIT can never be matched.
If I place the burden on the parser say as
unit:
w=WORD
{
if ($w == "cups") return $w;
}
;
and the WORD token is actually not a unit I have lost the token to the
parser. Should I / How can I place that nonmatch token back into the token
stream? Or what's the solution to that??
Thanks a lot - Sven
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"il-antlr-interest" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to
[email protected]
For more options, visit this group at
http://groups.google.com/group/il-antlr-interest?hl=en
-~----------~----~----~----~------~----~------~--~---
List: http://www.antlr.org/mailman/listinfo/antlr-interest
Unsubscribe:
http://www.antlr.org/mailman/options/antlr-interest/your-email-address
