# Array::map annotate with #\[must\_use\]

**URL:** <https://internals.rust-lang.org/t/array-map-annotate-with-must-use/22813>\
**Category:** libs\
**Created:** [April 25, 2025, 7:16am UTC](https://internals.rust-lang.org/t/array-map-annotate-with-must-use/22813 "2025-04-25T07:16:23Z")\
**Posts on this page:** 1\
**Showing post:** 18

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**Author:** ![Vorpal](https://avatars.discourse-cdn.com/v4/letter/v/aca169/32.png) [@Vorpal](https://internals.rust-lang.org/u/Vorpal)\
**Post date:** [April 30, 2025, 10:41am UTC](https://internals.rust-lang.org/t/array-map-annotate-with-must-use/22813/18 "2025-04-30T10:41:36Z")

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I like the idea of `NotCountedAsUsed`. It could possibly also help with this issue I filed a long time ago: [Rust should warn for unused "pure" objects · Issue #127685 · rust-lang/rust · GitHub](https://github.com/rust-lang/rust/issues/127685)

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