El 24/08/2014 2:55, Mostafa escribió:
Given the following code, if (1) is uncommented then it fails to compile under C++03 mode yet works in C++11 mode. If commented out, then it compiles successfully under both modes. (g++ 4.8.2 is being used) Is this behavior expected or a bug?
private: //Purposefully declared and not defined. Foo & operator=(Foo);
BOOST_MOVABLE_BUT_NOT_COPYABLE(Foo) already makes copy assignment private. See Boost.Move documentation. Returning by value requires CopyConstructible in C++03 compilers. If you declare that operation in Bar, then the compiler will use it. If you leave it out, Boost.Move magic will make moveable-only objects returnable by value. I think that you need BOOST_MOVE_RET to obtain portable behaviour: http://www.boost.org/doc/libs/1_56_0/doc/html/BOOST_MOVE_RET.html Best, Ion