edition 2021 - tracking issue

# Things we can improve with edition 2021

I don't know if there will be many other things to do with edition 2021, but there's at least one that I don't want to forget so opening a tracking issue

## [Additions to the prelude](https://blog.rust-lang.org/2021/05/11/edition-2021.html#additions-to-the-prelude)

## [Default cargo feature resolver](https://blog.rust-lang.org/2021/05/11/edition-2021.html#default-cargo-feature-resolver)

- [x] Remove `wasm_audio` feature and control it by target - #2397 

## [IntoIterator for arrays](https://blog.rust-lang.org/2021/05/11/edition-2021.html#intoiterator-for-arrays)

## [Disjoint capture in closure](https://blog.rust-lang.org/2021/05/11/edition-2021.html#disjoint-capture-in-closures)

## [Panic macro consistency](https://blog.rust-lang.org/2021/05/11/edition-2021.html#panic-macro-consistency)

## [New reserved syntax](https://blog.rust-lang.org/2021/05/11/edition-2021.html#reserving-syntax)

## [New cars errors](https://blog.rust-lang.org/2021/05/11/edition-2021.html#promoting-two-warnings-to-hard-errors)

## [Or patterns in macro rules](https://blog.rust-lang.org/2021/05/11/edition-2021.html#or-patterns-in-macro_rules)

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edition 2021 - tracking issue #2479

Things we can improve with edition 2021

Additions to the prelude

Default cargo feature resolver

IntoIterator for arrays

Disjoint capture in closure

Panic macro consistency

New reserved syntax

New cars errors

Or patterns in macro rules

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Uh oh!

edition 2021 - tracking issue #2479

Description

Things we can improve with edition 2021

Metadata

Metadata

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Development

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