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Compiler Warning (level 1) C4813

'function' : a friend function of a local class must have been previously declared

A friend function in an inner class was not declared in the outer class.

The following sample generates C4813:

// C4813.cpp
// compile with: /W1 /LD
void MyClass()
{
   // void func();
   class InnerClass
   {
      friend void func();   // C4813 uncomment declaration above
   };
}
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