std :: reference_wrapperのVisual C++ 10.0バグ？

Question

コード：4.6.1 ++ MinGWのgを有する

#include <functional> 

struct Foo 
{ 
    virtual void mf() = 0; 
}; 

struct Bar: Foo 
{ 
    virtual void mf() {} 
}; 

int main() 
{ 
    Bar o; 
    std::reference_wrapper<Foo const> wrapper(o); 
} 

結果：ビジュアルC++ 10.0と

 
[d:\dev\test] 
>g++ foo.cpp -std=c++0x 

[d:\dev\test] 
> _ 

結果：

 
[d:\dev\test] 
>cl foo.cpp 
foo.cpp 
C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\xxcallwrap(8) : error C2259: 'Foo' : cannot instantiate abstract class 
     due to following members: 
     'void Foo::mf(void)' : is abstract 
     foo.cpp(5) : see declaration of 'Foo::mf' 
     C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\xrefwrap(371) : see reference to class template instantiation 'std::tr1::_Call_wrapper' being compiled 
     with 
     [ 
      _Callable=std::tr1::_Callable_obj 
     ] 
     C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\xrefwrap(416) : see reference to class template instantiation 'std::tr1::_Refwrap_impl' being compiled 
     with 
     [ 
      _Ty=const Foo 
     ] 
     foo.cpp(16) : see reference to class template instantiation 'std::tr1::reference_wrapper' being compiled 
     with 
     [ 
      _Ty=const Foo 
     ] 
C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\xxcallwrap(8) : error C2027: use of undefined type 'std:: 
tr1::_Result_of' 
     with 
     [ 
      _Ty=const Foo (void) 
     ] 
C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\xxcallwrap(9) : error C2143: syntax error : missing ';' before '(' 
C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\xxcallwrap(9) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int 
C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\xxcallwrap(10) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int 
C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\xxcallwrap(8) : error C2259: 'Foo' : cannot instantiate abstract class 
     due to following members: 
     'void Foo::mf(void)' : is abstract 
     foo.cpp(5) : see declaration of 'Foo::mf' 
C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\xxcallwrap(8) : error C2259: 'Foo' : cannot instantiate abstract class 
     due to following members: 
     'void Foo::mf(void)' : is abstract 
     foo.cpp(5) : see declaration of 'Foo::mf' 
C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\xxcallwrap(8) : error C2259: 'Foo' : cannot instantiate abstract class 
     due to following members: 
     'void Foo::mf(void)' : is abstract 
     foo.cpp(5) : see declaration of 'Foo::mf' 
C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\xxcallwrap(8) : error C2259: 'Foo' : cannot instantiate abstract class 
     due to following members: 
     'void Foo::mf(void)' : is abstract 
     foo.cpp(5) : see declaration of 'Foo::mf' 
C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\xxcallwrap(8) : error C2259: 'Foo' : cannot instantiate abstract class 
     due to following members: 
     'void Foo::mf(void)' : is abstract 
     foo.cpp(5) : see declaration of 'Foo::mf' 
C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\xxcallwrap(8) : error C2259: 'Foo' : cannot instantiate abstract class 
     due to following members: 
     'void Foo::mf(void)' : is abstract 
     foo.cpp(5) : see declaration of 'Foo::mf' 
C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\xxcallwrap(8) : error C2259: 'Foo' : cannot instantiate abstract class 
     due to following members: 
     'void Foo::mf(void)' : is abstract 
     foo.cpp(5) : see declaration of 'Foo::mf' 
C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\xxcallwrap(8) : error C2259: 'Foo' : cannot instantiate abstract class 
     due to following members: 
     'void Foo::mf(void)' : is abstract 
     foo.cpp(5) : see declaration of 'Foo::mf' 
C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\xxcallwrap(8) : error C2259: 'Foo' : cannot instantiate abstract class 
     due to following members: 
     'void Foo::mf(void)' : is abstract 
     foo.cpp(5) : see declaration of 'Foo::mf' 
C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\xxcallwrap(8) : error C2259: 'Foo' : cannot instantiate abstract class 
     due to following members: 
     'void Foo::mf(void)' : is abstract 
     foo.cpp(5) : see declaration of 'Foo::mf' 

[d:\dev\test] 
> _ 

私は、Visualそのように好きC++コンパイラは抽象クラスをインスタンス化できないことをユーザーに11回伝えます。ユーザがそのことを知らなかった場合のように、ホームを指す。しかし、std::reference_wrapperは本当にクラスをインスタンス化する必要がありますか？ への参照（渡す）参照のポイントの多くではないインスタンス化が必要ですか？

これは、私が強く疑うが、Visual C++標準ライブラリ実装のバグですか？

Answer 1

質問者が解決しました。 Visual C++ 10.0のbugは、VCの次のメジャーバージョンで修正されているはずです。