private void* _memcpy_impl1(void* dest, const void* src, size_t count)

{

    (cast(ubyte*)dest)[0 .. count][]=(cast(const(ubyte)*)src)[0 .. count];

    return dest;

}

​

private void* _memcpy_impl2(ubyte* dest, const ubyte* src, size_t count) {

    foreach(i; 0 .. count) {

        dest[i] = src[i];   

    }

    return dest;

}