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Compiler Error C3824

  • Article

'member': this type cannot appear in this context (function parameter, return type, or a static member)

Pinning pointers cannot be function parameters, return types, or declared static.

The following sample generates C3824:

// C3824a.cpp
// compile with: /clr /c
void func() {
   static pin_ptr<int> a; // C3824
   pin_ptr<int> b; // OK
}

Managed Extensions for C++

Local pointers declared with the __pin keyword cannot be declared static and cannot be interior pointers.

The following sample generates C3824:

// C3824b.cpp
// compile with: /clr:oldSyntax /c
#using <mscorlib.dll>

__gc struct A {};

void func() {
   static A __pin* a;   // C3824
   A __pin* b;   // OK
}