[masklinn]

I think the out of order bit is fine, in most cases it’s not an issue and may even be necessary. Your proposal would be straight up incompatible with most collections, and greatly limiting to the rest.

But it should be clearly spelled out.

When your type is already called

    FixedBufferAllocator

You can probably extend it to

    FixedBufferBumpAllocator

And now the implications are more searchable and clearer.