xmpp-rs normally has the stance to get buggy implementations fixed
rather than dropping checks. In this particular case I think this is not
a good use of resources:
- The disco#info feature var conveys no actual information:
If an implementation replies properly to a disco#info query, it is
already implied that it supports the protocol.
- There are broken server implementations out there.
A lot of them (all recent (>= 0.10 && < 0.13 AFAICT) Prosody IM
instances). At this point in time, xmpp-rs is unable to query
disco#info from MUCs hosted on such prosody versions, except by
workarounds (such as the one removed in this diff).
- XEP-0030 now features a note which reads:
> Note: Some entities are known not to advertise the
> `http://jabber.org/protocol/disco#info` feature within their
> responses, contrary to this specification. Entities receiving
> otherwise valid responses which do not include this feature SHOULD
> infer the support.
The case would be different if there were no (deployed) implementations
which had this bug or if the bug actually had an effect on clients.
Especially the latter is not the case though, as pointed out above.
Hence, I conclude that this check is overly pedantic and the resources
(time, emotional energy of dealing with bugs, punching patches through
to stable distributions, etc. etc.) spent on getting this fixed would
be better invested elsewhere.
In addition, the workaround is extremely ugly and, even in the xmpp-rs
implementation, has no test coverage. Without test coverage of such an
implementation, it is bound to break in funny ways when xmpp-rs changes
the strings of its error messages (which is something one might do even
outside a breaking release).
This moves InnerJid into Jid and reformulates BareJid and FullJid in
terms of Jid.
Doing this has the key advantage that FullJid and BareJid can deref to
and borrow as Jid. This, in turn, has the advantage that they can be
used much more flexibly in HashMaps. However, this is (as we say in
Germany) future music; this commit only does the internal reworking.
Oh and also, it saves 20% memory on Jid objects.
Fixes#122 more thoroughly, or rather the original intent behind it.
This provides a non-copying API, which is generally favourable. The
other accessors were removed, because the intent was to provide this
"most sensible" API via the "default" (i.e. shortest, most concisely
named) functions.
