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[DOC] Revise the character literal part.

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51875 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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knu 2015-09-16 06:16:15 +00:00
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@ -1,3 +1,8 @@
Wed Sep 16 15:08:17 2015 Akinori MUSHA <knu@iDaemons.org>
* doc/syntax/literals.rdoc (Strings): [DOC] Revise the character
literal part.
Wed Sep 16 14:55:33 2015 Akinori MUSHA <knu@iDaemons.org> Wed Sep 16 14:55:33 2015 Akinori MUSHA <knu@iDaemons.org>
* doc/syntax/literals.rdoc (Strings): [DOC] Document the full list * doc/syntax/literals.rdoc (Strings): [DOC] Document the full list

19
doc/syntax/literals.rdoc
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@ -147,22 +147,22 @@ be concatenated as long as a percent-string is not last.
%q{a} 'b' "c" #=> "abc" %q{a} 'b' "c" #=> "abc"
"a" 'b' %q{c} #=> NameError: uninitialized constant q "a" 'b' %q{c} #=> NameError: uninitialized constant q
One more way of writing strings is using <tt>?</tt>: There is also a character literal notation to represent single
character strings, which syntax is a question mark (<tt>?</tt>)
followed by a single character or escape sequence that corresponds to
a single codepoint in the script encoding:
?a #=> "a" ?a #=> "a"
Basically only one character can be placed after <tt>?</tt>:
?abc #=> SyntaxError ?abc #=> SyntaxError
?\n #=> "\n"
Exceptionally, <tt>\C-</tt>, <tt>\M-</tt> and their combination are allowed ?\s #=> " "
before a character. They mean "control", "meta" and "control-meta" ?\\ #=> "\\"
respectively: ?\u{41} #=> "A"
?\C-a #=> "\x01" ?\C-a #=> "\x01"
?\M-a #=> "\xE1" ?\M-a #=> "\xE1"
?\M-\C-a #=> "\x81" ?\M-\C-a #=> "\x81"
?\C-\M-a #=> "\x81", same as above ?\C-\M-a #=> "\x81", same as above
?あ #=> "あ"
=== Here Documents === Here Documents
@ -350,4 +350,3 @@ one of the array entries you must escape it with a "\\" character:
If you are using "(", "[", "{", "<" you must close it with ")", "]", "}", ">" If you are using "(", "[", "{", "<" you must close it with ")", "]", "}", ">"
respectively. You may use most other non-alphanumeric characters for percent respectively. You may use most other non-alphanumeric characters for percent
string delimiters such as "%", "|", "^", etc. string delimiters such as "%", "|", "^", etc.