Re: [Boost-users] [move] non-inline move constructor - won't compile

3 Nov 2013

      Le 03/11/13 11:19, Krzysztof Czainski a écrit :
...
2013/11/2 Vicente J. Botet Escriba mailto:vicente.botet@wanadoo.fr>
Le 02/11/13 12:02, Krzysztof Czainski a écrit :
Hi,
I've been trying to writhe a non-inline move constructor, to
        place its' implementation in a .cpp file. I'm having problems
        compiling my code, which I managed to simplify (after
        examining output of the preprocessor) down to this short code
        snippet:
#include 
struct X
        {
            X( ::boost::rv< X >& x );
            operator ::boost::rv<X>&() { return *static_cast<
        ::boost::rv<X>* >(this); }
        };
X::X( ::boost::rv< X >& x ) {}
Compiling a .cpp file with the above contents gives me:
a.cpp:41:1: error: prototype for 'X::X(boost::rv<X>&)' does
        not match any in class 'X'
         X::X( ::boost::rv< X >& x ) {}
         ^
        a.cpp:35:8: error: candidates are: X::X(const X&)
         struct X
                ^
        a.cpp:37:5: error: X::X(boost::rv<X>&)
             X( ::boost::rv< X >& x );
             ^
I'm using MinGW gcc 4.8.1 in default -std mode (not-C++11
        mode), boost-1.54.
It works for me with clang-3.1 and clang-3.2, but not with gcc :(
    Really curious.
Am I doing something wrong here, or is it a bug in the compiler?
I would say that it is a bug on the compiler.
Best,
    Vicente
Thanks for checking this out, Vincente.
I simplified it a bit more, found out, that it has to do with 
attribute may_alias, and reported it to MinGW:
https://sourceforge.net/p/mingw/bugs/2126/
I also came up with a workaround, an example of which can be found in 
the attached files.
Glad to see that you know where is the problem.

Ion, may I suggest you to add this on the documentation?

Best,
Vicente