Tracking Issue for is_none_or

[RalfJung]

Feature gate: #![feature(is_none_or)]

This is a tracking issue for Option::is_none_or.

Public API

impl<T> Option<T> {
    pub fn is_none_or(self, f: impl FnOnce(T) -> bool) -> bool {
}

Steps / History

• ACP: Option::is_none_or libs-team#212
• Implementation: Add Option::is_none_or #126328
• Final comment period (FCP)¹
• Stabilization PR

Unresolved Questions

• None yet.

Footnotes

1. https://std-dev-guide.rust-lang.org/feature-lifecycle/stabilization.html ↩

[Amanieu]

This hasn't been on nightly long, but it's extremely useful to have since it can make code much more readable than using is_some_and with inverted conditions, as shown in #126328 (review).

@rfcbot fcp merge

[rfcbot]

Team member @Amanieu has proposed to merge this. The next step is review by the rest of the tagged team members:

• @Amanieu
• @BurntSushi
• @dtolnay
• @joshtriplett
• @m-ou-se

No concerns currently listed.

Once a majority of reviewers approve (and at most 2 approvals are outstanding), this will enter its final comment period. If you spot a major issue that hasn't been raised at any point in this process, please speak up!

See this document for info about what commands tagged team members can give me.

[rfcbot]

🔔 This is now entering its final comment period, as per the review above. 🔔