C++/CLI : Casting from unmanaged enum to managed enum

enums casting c++-cli native managed
Lopper picture Lopper · Dec 9, 2009 · Viewed 22.2k times · Source

What is the correct way of casting (in C++/CLI) from a native code enum to a managed code enum which contain the same enum values? Is there any difference with using the C# way of casting like for example (int) in C++/CLI.

Answer

mcdave picture mcdave · Dec 10, 2009

Assuming your native code is

enum shape_type_e
{
    stUNHANDLED     = 0,            //!< Unhandled shape data.
    stPOINT         = 1             //!< Point data.
    ...
};

and your managed code is

public enum class ShapeType
{
    Unhandled   = 0,
    Point       = 1,
    ...
};

You can cast from the native to the managed using

shape_type_e nativeST = stPOINT;
ShapeType managedST = static_cast<ShapeType>(nativeST);
Debug.Assert(managedST == ShapeType::Point);

I always use static_cast, not the C# way of casting.

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