Re: [boost] [move] problem with msvc and BOOST_MOVABLE_BUT_NOT_COPYABLE

Subject: Re: [boost] [move] problem with msvc and BOOST_MOVABLE_BUT_NOT_COPYABLE
From: Ilya Sokolov (ilyasokol_at_[hidden])
Date: 2010-05-28 09:04:12

Oliver Kowalke wrote:
> I get an linker error (private: __thiscall X::X(class X &) is unresolved symbol) with msvc-9.0 on XP.
> AFAIL (docu) implementing the copy-ctor isn't required and passing values from static memeber functions are allowed.
> 
> What's wrong?
> 
> Oliver
> 
> #include "stdafx.h"
> 
> #include <boost/move/move.hpp>
> 
> class X
> {
> private:
>     BOOST_MOVABLE_BUT_NOT_COPYABLE( X);
> public:
>     X();
>     static X create();
>     X( BOOST_RV_REF( X) other);
>     X & operator=( BOOST_RV_REF( X) other);
> };
> 
> X::X() {}
> 
> X X::create()
> {
>     X x;
>     return x; // passing value form static memeber-fn
> }
> 
> X::X( BOOST_RV_REF( X) other) {}
> 
> X & X::operator=( BOOST_RV_REF( X) other)
> { return * this; }
> 
> int _tmain(int argc, _TCHAR* argv[])
> {
>     X x( X::create() );
>     return 0;
> }
> 

Could BOOST_MOVABLE_BUT_NOT_COPYABLE be changed into CRTP base class?
It would prevent such errors at compile time. Also, it is quite
similar to boost::noncopyable.