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std: Mention clone-on-write mutation in Arc<T> #138341

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std: Mention clone-on-write mutation in Arc<T> #138341

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@xizheyin xizheyin commented Mar 11, 2025 •
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Fixes #138322

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rustbot commented Mar 11, 2025

r? @ibraheemdev

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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 Mar 11, 2025
@rustbot rustbot assigned joboet and unassigned ibraheemdev Mar 11, 2025
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Good idea! I have two minor suggestions:

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Thank you! I updated the changes. @joboet
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/// 3. Use [`Arc::get_mut`] when you know your `Arc` is not shared (has a reference count of 1),
///    which provides direct mutable access to the inner value without any cloning.

And,

/// inside an `Arc`. If you do need to mutate through an `Arc`, you have several options:

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mention Arc::make_mut alongside Mutex
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