size_t vs uintptr_t

[Walter Bright via Digitalmars-d]

On 6/14/2016 3:38 PM, Guillaume Boucher wrote:
> Isn't it guaranteed that x.sizeof >= x.alignof?  (At least it is in C and C++.)
> So the alignment should be of type size_t and not of type uintptr_t.
>
> Also in general cast(uint)ptr%alignment is wrong since alignment does not need
> to be 32 bit.  However, cast(size_t)ptr%alignment is be correct in any case.

There is no conceivable case where alignment will be > 32 bits, nor not being a 
power of 2.