Tracking Issue for CharIndices::offset function · Issue #83871 · rust-lang/rust (original) (raw)

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Description

Feature gate: #![feature(char_indices_offset)]

This is a tracking issue for the function CharIndices::offset. It returns the byte position of the next character, or the length of the underlying string if there are no more characters. This is useful for getting ranges over strings you're iterating over.

Public API

let mut chars = "a楽".char_indices();

assert_eq!(chars.offset(), 0); assert_eq!(chars.next(), Some((0, 'a')));

assert_eq!(chars.offset(), 1); assert_eq!(chars.next(), Some((1, '楽')));

assert_eq!(chars.offset(), 4); assert_eq!(chars.next(), None);

Steps / History

• Implementation: Added CharIndices::offset function #82585
• Final commenting period (FCP)
• Stabilization PR

Unresolved Questions

• Bad API Tracking Issue for CharIndices::offset function #83871 (comment)