FIX: C2321 Expanding Template with a Pointer to a Nested Class

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This article was previously published under Q150885

SYMPTOMS

At the point where a class template is expanded using the new operator to a nested class, the compiler reports the following errors:

[FileName](10) : error C2321: syntax error : unexpected 'A::B'

[FileName](27) : fatal error C1004: unexpected end of file found

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STATUS

This bug was corrected in Microsoft Visual C++, version 6.0.

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RESOLUTION

There are two possible workarounds to this problem. Each is stated in terms of the sample code below:

Remove t(new T()) from the initializer list and add t = new T(); to the body of the constructor. This workaround assumes class T is not a reference or a constant pointer.
Change the definitions of class A and class B so that B is no longer nested in the definition of A.

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Sample Code

/* Compile options needed: None */ 
template <class T> class C
{
public:
   C();
private:
   T *t;
};

template <class T> C<T>::C() : t(new T())  // error
{
}

lass A
{
public:

   class B
   {
   };

};

main()
{

   C<A::B> c;
   return 0;

}

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APPLIES TO

Microsoft Visual C++ 4.0 Standard Edition
Microsoft Visual C++ 4.1 Subscription
Microsoft Visual C++ 4.2 Enterprise Edition
Microsoft Visual C++ 4.2 Professional Edition
Microsoft Visual C++ 5.0 Enterprise Edition
Microsoft Visual C++ 5.0 Professional Edition

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kbbug kbfix kbvc600fix KB150885

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Retired KB Content Disclaimer

This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.

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