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char reference: s/character/Unicode scalar value/ #12990

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char reference: s/character/Unicode scalar value/ #12990

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8 changes: 6 additions & 2 deletions src/doc/rust.md
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Expand Up @@ -3136,8 +3136,12 @@ machine.

The types `char` and `str` hold textual data.

A value of type `char` is a Unicode character,
represented as a 32-bit unsigned word holding a UCS-4 codepoint.
A value of type `char` is a [Unicode scalar value](
http://www.unicode.org/glossary/#unicode_scalar_value)
(ie. a code point that is not a surrogate),
represented as a 32-bit unsigned word in the 0x0000 to 0xD7FF
or 0xE000 to 0x10FFFF range.
A `[char]` vector is effectively an UCS-4 / UTF-32 string.

A value of type `str` is a Unicode string,
represented as a vector of 8-bit unsigned bytes holding a sequence of UTF-8 codepoints.
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