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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/57064] [clarification requested] Which overload with ref-qualifier should be called?
Date: Fri, 26 Apr 2013 05:05:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57064

--- Comment #13 from Marc Glisse <glisse at gcc dot gnu.org> 2013-04-26 05:05:48 UTC ---
Note for Thiago: please be aware of the risks of returning an rvalue reference,
as opposed to just a value. The following codes will fail at runtime:

Qstring const& a=QString("%1 %2 %3 %4").arg(42).arg(47).arg(-42).arg(-47);
Qstring && b=QString("%1 %2 %3 %4").arg(42).arg(47).arg(-42).arg(-47);
for(char c : QString("%1 %2 %3 %4").arg(42).arg(47).arg(-42).arg(-47))...