Re: [PATCH] don't store temporary value returned from c_str()

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+From: Kim Minh Kaplan <kimminh.kaplan+nomuch@afnic.fr>\r
+To: Tomi Ollila <tomi.ollila@iki.fi>\r
+Subject: Re: [PATCH] don't store temporary value returned from c_str()\r
+References: <1366405933-17223-1-git-send-email-Vladimir.Marek@oracle.com>\r
+       <m2sj2cjp2b.fsf@guru.guru-group.fi>\r
+       <20130427101134.GI10394@pub.cz.oracle.com>\r
+Date: Tue, 30 Apr 2013 06:12:06 +0000\r
+In-Reply-To: <20130427101134.GI10394@pub.cz.oracle.com> (Vladimir Marek's\r
+       message of "Sat, 27 Apr 2013 12:11:35 +0200")\r
+Message-ID: <8761z4h7ih.fsf@kaki.tech.prive.nic.fr>\r
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+Cc: notmuch@notmuchmail.org, Vladimir Marek <vlmarek@volny.cz>\r
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+\r
+Vladimir Marek writes:\r
+\r
+> Well, a) standards says that\r
+>\r
+> A temporary bound to a reference parameter in a function call (5.2.2)\r
+> persists until the completion of the full expression containing the call\r
+>\r
+> (you can find the message all over the net, but I can't find actual link\r
+> to the standard :-/)\r
+\r
+The january 2012 working draft:=20\r
+http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3337.pdf\r
+\r
+    12.2 Temporary objects [class.temporary]\r
+\r
+    1 Temporaries of class type are created in various contexts: binding a\r
+    reference to a prvalue (8.5.3), returning a prvalue (6.6.3) [=E2=80=A6]\r
+\r
+    3 When an implementation introduces a temporary object of a class that\r
+    has a non-trivial constructor (12.1, 12.8), it shall ensure that a\r
+    constructor is called for the temporary object. Similarly, the\r
+    destructor shall be called for a temporary with a non-trivial destructor\r
+    (12.4). Temporary objects are destroyed as the last step in evaluating\r
+    the full-expression (1.9) that (lexically) contains the point where they\r
+    were created.\r
+\r
+Kim Minh.\r