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reference: correct some details on reader syntax for characters

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Closes #3506 and #3507
This commit is contained in:
Matthew Flatt 2020-11-17 13:11:31 -07:00
parent 4268091c7b
commit b28d682ec4
1 changed files with 7 additions and 4 deletions
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11
pkgs/racket-doc/scribblings/reference/reader.scrbl
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@ -804,15 +804,18 @@ one of the following forms:
4]{@nonterm{digit@sub{16}}}, as in string escapes (see
@secref["parse-string"]).}
@item{@litchar{#\U}@kleenerange[1 6]{@nonterm{digit@sub{16}}}:
like @litchar{#\u}, but with up to six hexadecimal digits.}
@item{@litchar{#\U}@kleenerange[1 8]{@nonterm{digit@sub{16}}}:
like @litchar{#\u}, but with up to eight hexadecimal digits (although
only six digits are actually useful).}
@item{@litchar{#\}@nonterm{c}: the character @nonterm{c}, as long
as @litchar{#\}@nonterm{c} and the characters following it
do not match any of the previous cases, and as long as
do not match any of the previous cases, as long as
@nonterm{c} or the
character after @nonterm{c} is not
@racketlink[char-alphabetic?]{alphabetic}.}
@racketlink[char-alphabetic?]{alphabetic}, and as long as
@nonterm{c} is not an octal digit or is not followed by an
octal digit (i.e., two octal digits commit to a third).}
]