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[DOC] Document the full list of supported escape sequences in string literals

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51874 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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knu 2015-09-16 06:03:18 +00:00
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@ -1,3 +1,8 @@
Wed Sep 16 14:55:33 2015 Akinori MUSHA <knu@iDaemons.org>
* doc/syntax/literals.rdoc (Strings): [DOC] Document the full list
of supported escape sequences in string literals.
Wed Sep 16 14:49:58 2015 Nobuyoshi Nakada <nobu@ruby-lang.org>
* string.c (rb_str_setbyte): keep the code range as possible.

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doc/syntax/literals.rdoc
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@ -83,8 +83,31 @@ Any internal <tt>"</tt> must be escaped:
"This string has a quote: \". As you can see, it is escaped"
Double-quote strings allow escaped characters such as <tt>\n</tt> for newline,
<tt>\t</tt> for tab, etc.
Double-quote strings allow escaped characters such as <tt>\n</tt> for
newline, <tt>\t</tt> for tab, etc. The full list of supported escape
sequences are as follows:
\0 null, ASCII 00h (NUL)
\a bell, ASCII 07h (BEL)
\b backspace, ASCII 08h (BS)
\t horizontal tab, ASCII 09h (TAB)
\n newline (line feed), ASCII 0Ah (LF)
\v vertical tab, ASCII 0Bh (VT)
\f form feed, ASCII 0Ch (FF)
\r carriage return, ASCII 0Dh (CR)
\e escape, ASCII 1Bh (ESC)
\s space, ASCII 20h (SPC)
\\ backslash, \
\nnn octal bit pattern, where nnn is 1-3 octal digits ([0-7])
\xnn hexadecimal bit pattern, where nn is 1-2 hexadecimal digits ([0-9a-fA-F])
\unnnn Unicode character, where nnnn is exactly 4 hexadecimal digits ([0-9a-fA-F])
\u{nnnn ...} Unicode character(s), where each nnnn is 1-6 hexadecimal digits ([0-9a-fA-F])
\cx or \C-x control character, where x is an ASCII printable character
\M-x meta character, where x is an ASCII printable character
\M-\C-x meta control character, where x is an ASCII printable character
Any other charater followed by a backslash is interpreted as the
character itself.
Double-quote strings allow interpolation of other values using
<tt>#{...}</tt>: