Compiler Error C2910

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The latest version of this topic can be found at Compiler Error C2910.

function' : cannot be explicitly specialized

The compiler detected an attempt to explicitly specialize a function twice.

The following sample generates C2910:

// C2910.cpp  
// compile with: /c  
template <class T>  
struct S;  
  
template <> struct S<int> { void f() {} };  
template <> void S<int>::f() {}   // C2910 delete this specialization

C2910 can also be generated if you try to explicitly specialize a non-template member. That is, you can only explicitly specialize a function template.

The following sample generates C2910:

// C2910b.cpp  
// compile with: /c  
template <class T> struct A {  
   A(T* p);  
};  
  
template <> struct A<void> {  
   A(void* p);  
};  
  
template <class T>  
inline A<T>::A(T* p) {}  
  
template <> A<void>::A(void* p){}   // C2910  
// try the following line instead  
// A<void>::A(void* p){}

This error will also be generated as a result of compiler conformance work that was done in Visual Studio .NET 2003:.

For code will be valid in the Visual Studio .NET 2003 and Visual Studio .NET versions of Visual C++, remove template <>.

The following sample generates C2910:

// C2910c.cpp  
// compile with: /c  
template <class T> class A {  
   void f();  
};  
  
template <> class A<int> {  
   void f();  
};  
  
template <> void A<int>::f() {}   // C2910  
// try the following line instead  
// void A<int>::f(){}   // OK