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Editorial Team
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Asked: 2026-06-07T00:20:33+00:00

So no , this is not the best way to do things. However, for

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So no, this is not the best way to do things. However, for the sake of theory, how would one successfully assign a pointer value to a pointer of an anonymous struct?

#pragma pack(push,1)
    struct
    {
        __int16 sHd1;
        __int16 sHd2;
    } *oTwoShort;
#pragma pack(pop)

    oTwoShort = (unsigned char*)msg; // C-Error

produces:

error C2440: ‘=’ : cannot convert from ‘unsigned char *’ to
‘<unnamed-type-oTwoShort> *’

The example assumes msg is a valid pointer itself.

Is this possible? Since you don’t have an actual type, can you even typecast?

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1 Answer

  1. Editorial Team

    You can get the type with decltype:

    oTwoShort = reinterpret_cast<decltype(oTwoShort)>(msg);

    This was added in C++11 though, so it won’t work with older compilers. Boost has an implementation of roughly the same (BOOST_PROTO_DECLTYPE) that’s intended to work with older compilers. It has some limitations (e.g., if memory serves, you can only use it once per scope) but it’s probably better than nothing anyway.

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