# \[TWiR\] Call for Participation

**URL:** <https://users.rust-lang.org/t/twir-call-for-participation/4821>\
**Category:** announcements\
**Created:** [February 29, 2016, 5:28pm UTC](https://users.rust-lang.org/t/twir-call-for-participation/4821 "2016-02-29T17:28:00Z")\
**Posts on this page:** 1\
**Showing post:** 481

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**Author:** ![dhardy](https://avatars.discourse-cdn.com/v4/letter/d/839c29/32.png) [@dhardy](https://users.rust-lang.org/u/dhardy)\
**Post date:** [December 4, 2022, 10:12am UTC](https://users.rust-lang.org/t/twir-call-for-participation/4821/481 "2022-12-04T10:12:22Z")

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I'd like to see more testing of [impl-tools](https://crates.io/crates/impl-tools).

It supports a number of things, including a more flexible `#[derive]`, `impl Self` syntax, auto trait implementation over generic types, and `singleton! { .. }`.

There have been some good suggestions (better support for new-type wrappers, better error messages). Keep them coming!

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