New adapter: std.allocator.quantizer

[Timon Gehr via Digitalmars-d]

On 05/10/2015 01:48 PM, Timon Gehr wrote:
>
>
> "bool expand(ref void[] b, size_t delta);
> Post: !result || b.length == old(b).length + delta     Expands b by
> delta bytes. If delta == 0, succeeds without changing b. If b is null,
> the call evaluates b = allocate(delta) and returns b !is null.
> Otherwise, *b must be a buffer previously allocated with the same
> allocator*. If expansion was successful, expand changes b's length to
> b.length + delta and returns true. Upon failure, the call effects no
> change upon the allocator object, leaves b unchanged, and returns false."

Actually, reading that snippet of the documentation, I notice more 
problems in the implementation of expand/the documentation of the 
rounding function.

If the rounding function returns a non-zero result for a zero argument, 
expand can return invalid memory (starting from address 0) if given an 
empty block 'b'.