Added $> support, fixed issue 16

doc/define_snippet.rst

@@ -748,3 +748,29 @@ is not. Here's an snippet for rst title:
 .. [1] With some minor change, mainly for fixing some trivial bugs.
 .. [2] This is done when you call ``yas/initialize``.
 .. [3] Of course, this can be customized.
+
+Indenting
+---------
+
+Many people miss the indenting feature of smart-snippet: when you
+place a ``$>`` in your snippet, an ``(indent-according-to-mode)`` will
+be executed there to indent the line. So you'll not need to hard-code
+the indenting in the snippet template, and it will be very convenient
+when you need to work with several different project where coding
+styles are different.
+
+The reason why this feature wasn't added to YASnippet until after
+0.5.6 is that it doesn't work well for all modes. In some cases
+(e.g. python-mode), calling ``indent-according-to-mode`` will break
+the overlays created by YASnippet.
+
+However, since many people asked for this feature, I finally added
+this to YASnippet. Here's an example of the usage:
+
+.. sourcecode:: text
+
+  for (${int i = 0}; ${i < 10}; ${++i})
+  {$>
+  $0$>
+  }$>
+

yasnippet.el

@@ -797,7 +797,14 @@ will be deleted before inserting template."
                            (yas/group-primary-field
                             (car groups)))))
             ;; no need to call exit-snippet, since no overlay created.
-            (yas/exit-snippet snippet)))))))
+            (yas/exit-snippet snippet)))
+
+        ;; Step 16: Do necessary indenting
+        (save-excursion
+          (goto-char (overlay-start (yas/snippet-overlay snippet)))
+          (while (re-search-forward "$>" nil t)
+            (replace-match "")
+            (indent-according-to-mode)))))))
 
 (defun yas/current-snippet-overlay (&optional point)
   "Get the most proper overlay which is belongs to a snippet."