On 12/22/11 5:38 PM, Vladimir Panteleev wrote:
On Thursday, 22 December 2011 at 23:30:06 UTC, Johannes Pfau wrote:
Vladimir Panteleev wrote:
On Thursday, 22 December 2011 at 23:12:07 UTC, Johannes Pfau
wrote:
There's one special thing about this module: It uses the ragel
(http://www.complang.org/ragel/) state machine compiler. I hope
this is not a problem for phobos, ragel doesn't introduce any
runtime dependencies and has no effect on licensing. There's
also no need to integrate ragel in the build process. We can
publish a pregenerated .d file, which should be updated
manually whenever changes to uuid.rl are made.
Would it be hard to reimplement the ragel part using string
mixins? From a quick glance at it, it doesn't seem too difficult.
It wouldn't be too difficult. Ragel is only used to parse the text
form of uuids. As that's a pretty simple task, such a parser could be
written manually.
But I also have a almost complete HTTP header parser/formatter
implementation using ragel which I wanted to propose for phobos
eventually. And I'm not going to rewrite those, so I hoped std.uuid
could clear the way for ragel based code in phobos ;-)
Using 3rd-party technology such as source preprocessors makes future
contributions more difficult for the vast majority. Considering that the
language provides nearly the same thing as a fully-supported feature, it
seems like a redundant complication. Parsing/formatting HTTP headers
isn't exactly rocket-science, either.
Agreed. I think it would be wonderful to achieve ragel capabilities with
compile-time execution. If we need ragel in D we've failed.
Andrei
