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grapheme cluster

What a reader sees as one character, which may be several chars.

A grapheme cluster is a user-perceived character as defined by Unicode's UAX #29 (for example e plus a combining accent, or an emoji sequence); Rust's standard library does not split them, the unicode-segmentation crate does.

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Examples

  • "e\u{301}" shows as one é but has chars().count() 2 and len() 3.

See also

char Unicode scalar value UTF-8
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