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Showing content from https://github.com/rust-lang/rust/issues/142312 below:

Tracking Issue for `str::trim_prefix`, `str::trim_suffix`, `slice::trim_prefix` and `slice::trim_suffix` · Issue #142312 · rust-lang/rust · GitHub

Feature gate: #![feature(trim_prefix_suffix)]

This is a tracking issue for adding trim_prefix and trim_suffix methods to str that remove at most one occurrence of a specified prefix or suffix while always returning a string slice (rather than Option<&str>), enabling easy method chaining.¹

impl str {
    pub fn trim_prefix<P>(&self, prefix: P) -> &str
    where
        P: Pattern;

    pub fn trim_suffix<P>(&self, suffix: P) -> &str
    where
        P: Pattern,
        for<'a> P::Searcher<'a>: ReverseSearcher<'a>;
}

(Remember to update the S-tracking-* label when checking boxes.)

• Implementation: Add trim_prefix and trim_suffix methods for both slice and str types. #142331
• Final comment period (FCP)²
• Stabilization PR

• None yet.

1. https://github.com/rust-lang/libs-team/issues/597 ↩

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

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