compiler-warning-level-2-c4356.md

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Learn more about: Compiler Warning (level 2) C4356	Compiler Warning (level 2) C4356	11/04/2016	C4356	C4356	3af3defe-de33-43b6-bd6c-2c2e09e34f3f

Compiler Warning (level 2) C4356

'member' : static data member cannot be initialized via derived class

The initialization of a static data member was ill formed. The compiler accepted the initialization. To avoid the warning, initialize the member through the base class.

Use the warning pragma to suppress this warning.

The following sample generates C4356:

// C4356.cpp
// compile with: /W2 /EHsc
#include <iostream>

template <class T>
class C {
   static int n;
};

class D : C<int> {};

int D::n = 0; // C4356
// try the following line instead
// int C<int>::n = 0;

class A {
public:
   static int n;
};

class B : public A {};

int B::n = 10;   // C4356
// try the following line instead
// int A::n = 99;

int main() {
   using namespace std;
   cout << B::n << endl;
}