Tracking Issue for Rust 2024: `Box<[T]>: IntoIter`

[traviscross]

This is a tracking issue for Box<[T]>: IntoIter in Rust 2024.

• WIP: IntoIterator for Box<[T]> + method dispatch mitigation for editions < 2024 #116607
• ACP: IntoIterator for Box<[T]> libs-team#263
• Box<[T]> should have an IntoIter implementation. #59878

About tracking issues

Tracking issues are used to record the overall progress of implementation. They are also used as hubs connecting to other relevant issues, e.g., bugs or open design questions. A tracking issue is however not meant for large scale discussion, questions, or bug reports about a feature. Instead, open a dedicated issue for the specific matter and add the relevant feature gate label.

Steps

• Implement in nightly Rust 2024 for Box<[T]>.
  • Add IntoIterator for Box<[T]> + edition 2024-specific lints #124097
• Implement migration lints for Box<[T]>.
  • Add IntoIterator for Box<[T]> + edition 2024-specific lints #124097
• N/A: Add documentation to the dev guide.
  • See the instructions.
• N/A: Add documentation to the reference.
  • See the instructions.
• Add documentation to the edition guide.
  • Add IntoIterator for Box<[T]> in 2024 edition-guide#307
• Ensure ready for Rust 2024 stabilization.

Related items

• WIP: IntoIterator for Box<[T]> + method dispatch mitigation for editions < 2024 #116607
• ACP: IntoIterator for Box<[T]> libs-team#263
• Box<[T]> should have an IntoIter implementation. #59878
• Add Box<[T; N]>: IntoIterator without any method dispatch hacks #124108

Implementation history

• Add IntoIterator for Box<[T]> + edition 2024-specific lints #124097

cc @rust-lang/libs-api @clarfonthey @jhpratt

[traviscross]

Based on the results of the crater run in #124108, it doesn't seem that needs the migration hack, so when that lands it will be insta-stable and not coupled to the edition. So we can pull that off the list.

Consequently, all the remainder of this item needs now to be done is documentation.

[cuviper]

Note, that crater run was only for Box<[T; N]>, not Box<[T]>.

[traviscross]

Right. Box<[T]>: IntoIter is #124097, which does need the migration hack, and is coupled to the edition.

[clarfonthey]

(The point being made here is that the issue should only reference the Box<[T]>: IntoIterator implementation, and not the Box<[T; N]>: IntoIterator implementation, to avoid confusing people tracking it. Right now it references both.)