On 2011-05-18 12:45, Chris Heller wrote:
The general direction is to have something that works much like the
RRULE portion of
the iCalendar (RFC 5545) specification. I have decided avoid strict
RFC compliance at
this time.
At one point I investigated a really generalised version of this,
including an abstract syntax type and perhaps a way of parsing some
useful subset of English expressions into it. However I got stuck on
such things as
"any day after the sixth Sunday of a month"
In order to prove that today was not such a day, it would have know that
"sixth Sunday of a month" never happens. Simply searching into the past
for one would never terminate. Either I would have to restrict the
language, or assert the beginning of time (not necessarily a bad solution).
Anyway, a possible project for you or someone.
--
Ashley Yakeley
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