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Showing content from https://github.com/rust-lang/rust/issues/126769 below:

Tracking Issue for `substr_range` and related methods · Issue #126769 · rust-lang/rust · GitHub

• Pricing

Feature gate: #![feature(substr_range)]

This is a tracking issue for str::substr_range, slice::subslice_range, and slice::element_offset as described in this ACP.

These methods can be used for error handling and to extend str::lines, str::split, slice::split, and other related methods.

impl str {
    fn substr_range(&self, substr: &str) -> Option<Range<usize>>;
}

impl<T> [T] {
    fn subslice_range(&self, subslice: &[T]) -> Option<Range<usize>>;
    fn element_offset(&self, element: &T) -> Option<usize>;
}

• ACP
• Implementation: Add elem_offset and related methods #126770
• Rename elem_offset to element_offset #132830
• Final comment period (FCP)¹
• Stabilization PR: Stabilize substr_range and related methods #141266

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

Kolsky, wmstack, kornelski, Nicholas-Hein and joseluisKolsky

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