Tracking Issue for str::{floor, ceil}_char_boundary · Issue #93743 · rust-lang/rust (original) (raw)

Feature gate: #![feature(round_char_boundary)]

This is a tracking issue for str::{floor, ceil}_char_boundary.

Public API

impl str { // Returns the character boundary at or immediately before index fn floor_char_boundary(&self, index: usize) -> usize;

// Returns the character boundary at or immediately after `index`
fn ceil_char_boundary(&self, index: usize) -> usize;

}

Steps / History

• Implementation: Add {floor,ceil}_char_boundary methods to str #86497
• Final comment period (FCP)
• Stabilization PR

Unresolved Questions

• Should ceil_char_boundary panic when indices are out of bounds? Don't panic in ceil_char_boundary #112387 is an existing PR to change this to return the length instead.