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+ Mon, 17 Sep 2012 08:11:51 -0700 (PDT)\r
+Sender: Michal Nazarewicz <mpn@google.com>\r
+From: Michal Nazarewicz <mina86@mina86.com>\r
+To: Jani Nikula <jani@nikula.org>, Tomi Ollila <tomi.ollila@iki.fi>,\r
+ notmuch@notmuchmail.org, David Bremner <david@tethera.net>\r
+Subject: Re: [PATCH v3 6/9] lib: add date range query support\r
+In-Reply-To: <874nn2rqsn.fsf@nikula.org>\r
+Organization: http://mina86.com/\r
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+ <m2r4q6jgz5.fsf@guru.guru-group.fi> <874nn2rqsn.fsf@nikula.org>\r
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+Date: Mon, 17 Sep 2012 17:11:45 +0200\r
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+\r
+--=-=-=\r
+Content-Type: text/plain; charset=utf-8\r
+Content-Transfer-Encoding: quoted-printable\r
+\r
+On Thu, Sep 13 2012, Jani Nikula wrote:\r
+> I find "since" rounding towards past and "until" rounding towards future\r
+> a very simple rule. But YMMV.\r
+\r
+To implement rounding, each date needs to have a period of time to align\r
+to. I call that a duration. But if you have such a duration than\r
+I propose a solution where you don't need any kind of rounding.\r
+\r
+If =E2=80=9Cyesterday=E2=80=9D has a duration of one day, than =E2=80=9Cdat=\r
+e:yesterday=E2=80=9D would be\r
+equivalent to =E2=80=9Cdate:yesterday..yesterday + 1 day=E2=80=9D and this =\r
+works\r
+perfectly well with ranges open on the right side. So to implement date\r
+specifications with a single date, no additional code is really\r
+required.\r
+\r
+--=20\r
+Best regards, _ _\r
+.o. | Liege of Serenely Enlightened Majesty of o' \,=3D./ `o\r
+..o | Computer Science, Micha=C5=82 =E2=80=9Cmina86=E2=80=9D Nazarewicz =\r
+ (o o)\r
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