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Jonas Schäfer 9fdb1564f6 xso: reject attempts to match the same XML attribute in different fields
This was a bit tricky to build, because it is possible to have an
indirection through a `static` there. Thanks to Rust's extensive
const-fn capabilities, though, it's in fact possible to cover all cases.

We still do two different checks to improve user experience. If we can,
from within the proc macro, determine that two fields refer to the same
XML attribute (because their namespace/name values use the same Rust
tokens), then we reject the fields with a clear error message pointing
at both fields.

In the other case, when there's e.g. `#[xml(lang)]` and
`#[xml(attribute(namespace = rxml::XMLNS_XML, name = "lang"))]`, the
macro cannot be sure that XMLNS_XML is in fact the XML namespace. For
that case, we generate code which is evaluated at compile time (and
has no runtime impact) which panics if the namespace and name of two
attribute-matching fields is the same.

The error message will be less clear (because it contains extra,
unchangeable wording like "evaluation of constant value failed" and "the
evaluated program panicked at", which may be a bit confusing) than the
message generated by the macros themselves, but it's a price we have to
pay unfortunately.

Note that this check may seem cosmetic and purely for better user
experience, but it is in fact needed to avoid generating not-well-formed
and/or not-namespace-well-formed XML: As `AsXml` generates `xso::Item`,
where each attribute is emitted separated (and not aggregated in a
map structure), a naive (and efficient) implementation of a writer might
not double-check that no duplicate attributes are generated.
2025-04-27 11:18:50 +02:00
.forgejo/workflows CI: Ensure treeish string works for main 2024-12-30 21:08:42 +01:00
jid jid: clippy run 2025-04-08 12:47:56 +02:00
minidom Bump rxml to 0.13.1 2025-04-22 17:47:45 +02:00
parsers Track xml:lang throughout parsing 2025-04-22 17:55:44 +02:00
sasl sasl: Simplify hash conversion to Vec 2024-12-15 17:17:01 +00:00
tokio-xmpp Track xml:lang throughout parsing 2025-04-22 17:55:44 +02:00
xmpp xmpp: new 'escape-hatch' feature 2025-04-20 13:41:56 +00:00
xso xso: reject attempts to match the same XML attribute in different fields 2025-04-27 11:18:50 +02:00
xso-proc xso: reject attempts to match the same XML attribute in different fields 2025-04-27 11:18:50 +02:00
.gitea Support Github Actions (for a migration to forgejo) 2023-12-03 14:20:51 +00:00
.github Deny warnings in github/gitea/forgejo CI and act local runner 2024-01-21 13:55:39 +01:00
.gitignore Hello world! 2019-03-21 18:43:27 +01:00
.gitlab-ci.yml CI: add .show-version block in docs job 2025-04-08 12:43:30 +02:00
Cargo.toml xso-proc: start making derive macros for FromXml and IntoXml 2024-06-23 12:20:02 +02:00
CODE_OF_CONDUCT.md Code of Conduct 2024-01-21 21:50:31 +01:00
CONTRIBUTING.md fix typos 2024-09-16 18:29:44 -03:00
LICENSE Readd global LICENSE file 2020-02-25 22:13:34 +01:00
README.md CONTRIBUTING: Split in categories 2024-02-02 22:26:00 +01:00

xmpp-rs

What's this?

A very much WIP set of rust XMPP library with the goals of being type-safe and well-tested.

  • xmpp-rs provides a high-level API for the protocol. You shouldn't need to know about the protocol to use it.
  • tokio-xmpp is a lower-level library that handles the XMPP stream(s).
  • xmpp-parsers parses XML into Rust and back.
  • minidom is a DOM library quite specific for XMPP
  • jid is a Jid parsing library.

Contact

There is an XMPP MUC for the discussion of this library, feel free to join! :)

chat@xmpp.rs

Community

A Code of Conduct is available as CODE_OF_CONDUCT.md in the repository for the well-being of the community. Please refer to it in case of a possible conflict in any of the xmpp-rs venues (channel, forge, etc.).

License

Mozilla Public License 2 (MPL2). See the LICENSE file.

Building

Dependencies should be provided by crates if you use the default features. If you use tokio-xmpp's tls-native feature you will need an ssl library (openssl, libressl, etc.).

cargo build

The various features available should be explained in the crates themselves.

Contributing

Thank you for your interest in the project!

Contributing rules are available as CONTRIBUTING.md in the repository.