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provide additional justification for array interface design #35613

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matthew-piziak
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Explain why Rust does not implement traits for large arrays.

Explain why most methods are implemented on slices rather than arrays.

Note: I'm dipping my toes in the water with a tiny PR. Especially looking for feedback on wording and style. Points of concern: appropriate level of top-level explanation; foreshadowing (is it appropriate to imply that we expect Rust's type system to eventually support size-generic arrays?); using Foo and Bar as type variables instead of e.g. T and S.

@peschkaj

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Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @alexcrichton (or someone else) soon.

If any changes to this PR are deemed necessary, please add them as extra commits. This ensures that the reviewer can see what has changed since they last reviewed the code. Due to the way GitHub handles out-of-date commits, this should also make it reasonably obvious what issues have or haven't been addressed. Large or tricky changes may require several passes of review and changes.

Please see the contribution instructions for more information.

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@bors: r+ rollup

Thank you!

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bors commented Aug 12, 2016

📌 Commit a97ed61 has been approved by steveklabnik

@@ -269,13 +269,18 @@ mod prim_pointer { }
/// - `Borrow`, `BorrowMut`
/// - `Default`
///
/// This limitation to `N in 0..32` exists because Rust does not yet support
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It's actually 0..33

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Thanks! 👍

Fixed.

Explain why Rust does not implement traits for large arrays.

Explain why most methods are implemented on slices rather than arrays.
@matthew-piziak
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r? @peschkaj

@matthew-piziak
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r? @steveklabnik

@peschkaj
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LGTM. 👍

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@bors: r+ rollup

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bors commented Aug 15, 2016

📌 Commit e173ead has been approved by steveklabnik

sophiajt pushed a commit to sophiajt/rust that referenced this pull request Aug 17, 2016
…tification, r=steveklabnik

provide additional justification for array interface design

Explain why Rust does not implement traits for large arrays.

Explain why most methods are implemented on slices rather than arrays.

Note: I'm dipping my toes in the water with a tiny PR. Especially looking for feedback on wording and style. Points of concern: appropriate level of top-level explanation; foreshadowing (is it appropriate to imply that we expect Rust's type system to eventually support size-generic arrays?); using `Foo` and `Bar` as type variables instead of e.g. `T` and `S`.

@peschkaj
bors added a commit that referenced this pull request Aug 17, 2016
sophiajt pushed a commit to sophiajt/rust that referenced this pull request Aug 17, 2016
…tification, r=steveklabnik

provide additional justification for array interface design

Explain why Rust does not implement traits for large arrays.

Explain why most methods are implemented on slices rather than arrays.

Note: I'm dipping my toes in the water with a tiny PR. Especially looking for feedback on wording and style. Points of concern: appropriate level of top-level explanation; foreshadowing (is it appropriate to imply that we expect Rust's type system to eventually support size-generic arrays?); using `Foo` and `Bar` as type variables instead of e.g. `T` and `S`.

@peschkaj
bors added a commit that referenced this pull request Aug 17, 2016
@bors bors merged commit e173ead into rust-lang:master Aug 17, 2016
@matthew-piziak matthew-piziak deleted the array-docs-trait-justification branch August 17, 2016 20:11
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7 participants