[Boost-bugs] [Boost C++ Libraries] #6167: Assignment from a temporary of a class containing boost::unordered_map members fails with GNU GCC.

Subject: [Boost-bugs] [Boost C++ Libraries] #6167: Assignment from a temporary of a class containing boost::unordered_map members fails with GNU GCC.
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-11-23 10:49:37

#6167: Assignment from a temporary of a class containing boost::unordered_map
members fails with GNU GCC.
---------------------------------------------+------------------------------
 Reporter:  Geurt Vos <geurt.vos@…>          |       Owner:  danieljames
     Type:  Bugs                             |      Status:  new        
Milestone:  To Be Determined                 |   Component:  unordered  
  Version:  Boost 1.48.0                     |    Severity:  Problem    
 Keywords:                                   |  
---------------------------------------------+------------------------------
 With boost 1.48.0 the following code does not compile anymore:

 ----

 #include <boost/unordered_map.hpp>

 struct A {
     boost::unordered_map<int, int> m;
 };

 void Test()
 {
     A a;[[BR]]
     a = A();
 }

 ----

 GCC 4.6.1 & GCC 4.1.2 say:
   11:8: error: no match for ‘operator=’ in ‘a = A()’[[BR]]
   11:8: note: candidate is:[[BR]]
   4:8: note: A& A::operator=(A&)[[BR]]
   4:8: note:   no known conversion for argument 1 from ‘A’ to ‘A&’[[BR]]

 When GCC 4.6.1 is set as C++11 compiler (-std=c++0x), it compiles without
 errors.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/6167>
Boost C++ Libraries <http://www.boost.org/>
Boost provides free peer-reviewed portable C++ source libraries.