Appender is able to do this:
It seems that Appender allocates its own private data:
private struct Data
{
size_t capacity;
Unqual!T[] arr;
bool canExtend = false;
}
...
private Data* _data;
...
_data = new Data;
But hopefully its bug free unlike what I posted (missing
`T.sizeof *` in the memcpy call).
