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Add #[must_use] to Array::map #140957

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JulianKnodt
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The output of Array::map is intended to be an array of the same size, and does not modify the original in place nor is it intended for side-effects. Thus, under normal circumstances it should be consumed.

See discussion.

Attaching to tracking issue #75243

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rustbot commented May 13, 2025

r? @Mark-Simulacrum

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@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-libs Relevant to the library team, which will review and decide on the PR/issue. labels May 13, 2025
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The output of Array::map is intended to be an array of the same size, and does not modify the
original in place nor is it intended for side-effects. Thus, under normal circumstances it should be consumed.

See [discussion](https://internals.rust-lang.org/t/array-map-annotate-with-must-use/22813/26).

Attaching to tracking issue rust-lang#75243
@Mark-Simulacrum Mark-Simulacrum added the relnotes Marks issues that should be documented in the release notes of the next release. label May 16, 2025
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@bors r+

This seems reasonable.

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bors commented May 16, 2025

📌 Commit ab1c49a has been approved by Mark-Simulacrum

It is now in the queue for this repository.

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels May 16, 2025
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@bors rollup

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