Re: std.uuid: Update 4

[Dmitry Olshansky]

On 17.06.2012 12:04, Johannes Pfau wrote:
Am Sat, 16 Jun 2012 21:11:51 +0400
schrieb Dmitry Olshansky<dmitry.o...@gmail.com>:

Ah and another way to go about it is:
union {
        ubyte[16] uuid;
        size_t[16/size_t.sizeof] by_word;
}


Isn't that an optimization which should really be done by the compiler?
It already knows that it's supposed to compare two ubyte[16]...

It knows that you compare two ubyte[16] that it.
It easily might miss the fact that one of them is always 0 in all 16 cells.


Also how could the union solution be used without having to copy the
data?

There is no copy it union, aka overlapped storage. In other words as 
these 16 bytes represented as (on 32bit) 4 size_t. They share memory 
location. It doesn't play nice with CTFE though, as it thinks unions to 
be plain struct last time I checked.

--
Dmitry Olshansky