最全的的正则表达式语法手册.pdf

Basic Syntax Reference Characters Character Description Example Any character except All characters except the listed special characters a matches a [\^$.|?*+() match a single instance of themselves. { and } are literal characters, unless theyre part of a valid regular expression token (e.g. the {n} quantifier). \ (backslash) A backslash escapes special characters to suppress \+ matches + followed by any of their special meaning. [\^$.|?*+(){} \Q...\E Matches the characters between \Q and \E \Q+­*/\E matches literally, suppressing the meaning of special +­*/ characters. \xFF where FF are 2 Matches the character with the specified \xA9 matches © hexadecimal digits ASCII/ANSI value, which depends on the code when using the page used. Can be used in character classes. Latin­1 code page. \n, \r and \t Match an LF character, CR character and a tab \r\n matches a character respectively. Can be used in character DOS/Windows CRLF classes. line break. \a, \e, \f and \v Match a bell character (\x07), escape character (\x1B), form feed (\x0C) and vertical tab (\x0B) respectively. Can be used in character classes. \cA through \cZ Match an ASCII character Control+A through \cM\cJ matches a Control+Z, equivalent to \x01 th