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enumscastingc++-clinativemanaged

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

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.

Solution

  • 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.