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go/doc/next/6-stdlib/99-minor/unicode/utf16/44940.md
Jes Cok ef4f2a0597 unicode/utf16: add func RuneLen 
This CL adds func RuneLen, while here, also uses RuneLen to simplify
code in Encode.

Fixes #44940

Change-Id: Ifd3b537f69880dfd32a69a6733d8d3c2b5d4ecba
Reviewed-on: https://go-review.googlesource.com/c/go/+/569755
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Commit-Queue: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
2024-03-07 19:08:48 +00:00

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The unicode/utf16.RuneLen function returns the number of 16-bit words in the UTF-16 encoding of the rune. It returns -1 if the rune is not a valid value to encode in UTF-16.