Structured Formatters for JSON Output

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+From: <craven@gmx.net>\r
+To: notmuch@notmuchmail.org\r
+Subject: Structured Formatters for JSON Output\r
+Date: Thu, 12 Jul 2012 09:43:21 +0200\r
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+\r
+Currently there is no easy way to add support for different structured\r
+formatters (like JSON). For example, adding support for S-Expressions\r
+would result in code duplication.\r
+\r
+This patch series amends the situation by introducing structured\r
+formatters, which allow different implementations of structured output\r
+for elements like lists, maps, strings and numbers.\r
+\r
+The new code in sprinter.h and sprinter.c can be used\r
+instead of the current ad-hoc output in all parts of notmuch, a patch\r
+for notmuch-search.c is included.\r
+\r
+In a later patch, all other parts of notmuch should be adapted to the\r
+structured formatters, and the creation of formatters should be\r
+centralised (to make adding new formatters easier).\r
+\r