std.uuid: Update 4

[Dmitry Olshansky]

On 16.06.2012 21:06, Dmitry Olshansky wrote:
> On 16.06.2012 15:30, Johannes Pfau wrote:
>> Am Tue, 12 Jun 2012 13:46:17 +0200
>> schrieb Johannes Pfau<nospam at example.com>:
>>
>>> Am Mon, 11 Jun 2012 13:12:49 +0200
>>> schrieb Johannes Pfau<nospam at example.com>:
>>>
>>>> Am Sun, 10 Jun 2012 18:49:03 +0200
>>>> schrieb Johannes Pfau<nospam at example.com>:
>>>>
>>>>> Am Sat, 09 Jun 2012 21:30:57 +0400
>>>>> schrieb Dmitry Olshansky<dmitry.olsh at gmail.com>:
>>>>>> Code: https://github.com/jpf91/phobos/blob/std.uuid/std/uuid.d
>>>>>> API-Docs: http://dl.dropbox.com/u/24218791/d/src/uuid.html
>>>>>
>>>>> I pushed these changes suggested by Dmitry Olshansky and Jonas
>>>>> Drewsen:
>>>>>
>>>>> * Add documentation table
>>>>> * Rename UUID.isNil --> UUID.empty
>>>>> * Merge ParserException and IsufficientInputException into
>>>>> UUIDParserException
>>>>> * Add note about std.variant.Variant
>>>>> * Rewrite example to avoid cast
>>>>> * Add non-working(commented out) variadic constructor
>>>>> * Rename extractRegex --> uuidRegex
>>>>> * Use std.algorithm.swap instead of swapRanges
>>>>
>>>> * parseUUID now supports InputRanges with ElementType == dchar (all
>>>> string types are still supported as well)
>>>>
>>>>
>>>
>>> * randomUUID now creates the RNG only once per thread.
>>> * randomUUID lazily seeds the RNG once (per thread) on the first
>>> function call
>>> * randomUUID now uses the new seed overload (requires
>>> https://github.com/D-Programming-Language/phobos/pull/627 )
>>> * the unsafe randomUUID overload taking only a type has been removed.
>>>
>>
>> * Add changes suggested by Jonathan M Davis (see
>> https://github.com/jpf91/phobos/commit/91cd1c1f4385cfe1cd868c0720aff257d9436822
>>
>> )
>
> Surely, a better way then making a global is to routinely check for zeros.
>
> Plus, you can cast .ptr to size_t* and compare word by word in 4 or 2
> ops(!). You'd better watch out for __ctfe though, it deon't allow
> casting pointers this way.
>
>

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

-- 
Dmitry Olshansky