UNIX Regular Expression Definition
\ol Turns off multi-line matching (default). You can still
use \n to create regular expressions which match
one or more lines. However, expressions like .+ will
not match multiple lines. This is much safer and
usually faster than using the \om option.
\char Declares character after slash to be literal. For ex-
ample, \* represents the star character.
\:char Matches predefined expression corresponding to
char. The pre-defined expressions are:
• \:a [A-Za-z0-9] - Matches an alphanumeric char-
acter.
• \:c [A-Za-z] - Matches an alphabetic character.
• \:b (?:[ \t]+) - Matches blanks.
• \:d [0-9] - Matches a digit.
• \:f (?:[^\[\]\:\\/<>|=+;, \t"’]+) - Windows: Matches
a file name part.
• \:f (?:[^/ \t"’]+) - UNIX: Matches a file name part.
• \:h (?:[0-9A-Fa-f]+) - Matches a hex number.
• \:i (?:[0-9]+) - Matches an integer.
• \:n
(?:(?:[0-9]+(?:\.[0-9]+|)|\.[0-9]+)(?:[Ee](?:\+|-|)[0-
9]+|)) - Matches a floating number.
• \:p (?:(?:[A-Za-z]:|)(?:\\|/|)(?:\:f(?:\\|/))*\:f) - Win-
dows: Matches a path.
• \:p (?:(?:/|)?:(?::f(/))*\:f) - UNIX: Matches a path.
• \:q (?:\"[^\"]*\"|'[^']*') - Matches a quoted string.
• \:v (?:[A-Za-z_$][A-Za-z0-9_$]*) - Matches a C
variable.
• \:w (?:[A-Za-z]+) - Matches a word.
The precedence of operators, from highest to lowest, is as follows:
UNIX Regular Expressions
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