...
uuid u = { /* 6ba7b814-9dad-11d1-80b4-00c04fd430c8 */ 0x6b, 0xa7, 0xb8, 0x14, 0x9d, 0xad, 0x11, 0xd1, 0x80, 0xb4, 0x00, 0xc0, 0x4f, 0xd4, 0x30, 0xc8 };
I am not sure as a user I'd be interested in doing that kind of low-level stuff and in fact I am doubtful it'll even compile.
It does work, actually. I use it to implement uuids::namespaces::dns() and friends.
It compiles indeed! Tried MSVC++9 and even ol' gcc 3.4.4. C++0X talks about initialization of that kind but for standard containers. To me it feels like very non-standard behavior. What am I missing? Someone help me out here.
4.1.7. Nil UUID
The nil UUID is special form of UUID that is specified to have all 128 bits set to zero.
I'm not particularly attached to nil(), but at the same time, I don't have any better name. I dislike null(), when people are used to treating NULL as pointer (even when it actually isn't). C# uses Empty, but that's also not great, since empty is strongly entrenched through its use in the Container concept.
Fair enough. The standard expicitly mentioning uuid::nil() sounds like a good reason.
Really, I'd be plenty happy to get rid of it entirely, since value initialization provides the same functionality: uuid id = uuid();
Have to disagree as to me the above is unclear as I am not sure if it means "create a new uuid" or "create an invalid uuid". I prefer saying clearly what I mean, i.e. uuid id(uuid::nil()); Best, Vladimir.