[Assorted-commits] SF.net SVN: assorted:[1096] cpp-commons/trunk/src/commons/boost/delegates.h

[<yan...@us...>]

Revision: 1096
          http://assorted.svn.sourceforge.net/assorted/?rev=1096&view=rev
Author:   yangzhang
Date:     2008-12-07 08:18:08 +0000 (Sun, 07 Dec 2008)

Log Message:
-----------
added finally

Modified Paths:
--------------
    cpp-commons/trunk/src/commons/boost/delegates.h

Modified: cpp-commons/trunk/src/commons/boost/delegates.h
===================================================================
--- cpp-commons/trunk/src/commons/boost/delegates.h	2008-12-06 23:04:40 UTC (rev 1095)
+++ cpp-commons/trunk/src/commons/boost/delegates.h	2008-12-07 08:18:08 UTC (rev 1096)
@@ -48,6 +48,20 @@
 //    catch (std::exception &ex) { return std::exception(ex); }
 //  }
 
+  /**
+   * A class that takes a functor and calls it on destruction, effectively
+   * giving you a `finally` clause.  Particularly useful with clamp.
+   */
+  //template<typename T>
+  typedef function0<void> T;
+  class finally {
+    public:
+      finally(T f): f_(f) {}
+      ~finally() { f_(); }
+    private:
+      T f_;
+  };
+
 }
 
 #endif


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