Copying object with memcpy

[Cruz]

When writing a custom assignment operator, is there a caveat to first copying the whole object with a memcpy rather than tediously field by field, and then fixing the pointers and such? This is what I mean:

MyObject& MyObject::operator=(const MyObject &o)
{
    memcpy(this, &o, sizeof(MyObject)); // Copy everything in one go.
 
    // Do other things like fix pointers.
 
    return *this;
}

MyObject& MyObject::operator=(const MyObject &o)
{
    memcpy(this, &o, sizeof(MyObject)); // Copy everything in one go.

    // Do other things like fix pointers.

    return *this;
}

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[jefftee]

I'd say if MyObject is a class you designed and understand the implications of doing so, then go for it. However, if you don't know the internals of the MyObject class and what affects this would have, I'd advise against it.