I think there is an issue within ANTLR and supporting the optional
operator '?'.
Here's what I'm doing:
conditionalTest
: 'when arrival >' INTEGERPIPETIME
;
INTEGER : '0'..'9'+ ;
INTEGERPIPETIME: (INTEGER '|')? TIME;
TIME: INTEGER ':' INTEGER;
When I try to validate the following statement:
when arrival > 1|13:59
It works fine. '1|' should be optional because of the '?' operator.
So I use this statement:
when arrival > 13:59
And I receive an error stating it was expecting TIMETICKS. TIMETICKS
is clearly using the optional operator, so why is ANTLR always
expecting to see the integer pipe combination?
Any help would be appreciated.
Thanks!
Josh
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