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Metacharacters
Metacharacters are characters with special meaning that perform a certain task. The regular expression metacharacters supported in the CXL script language are:
^ $ . + * ? | \ [ and ] - ( and )
Metacharacter Meanings and Examples
 
 
MEANING
EXAMPLE
EXPLANATION OF EXAMPLE
^
1. beginning of a line or string
2. negation, inside a character class [ ]
1. /^ABC/
2. /[^ABC]D/
1. matches ABC at the beginning of a line or string
2. matches any character before D except A or B or C
$
end of a line or string
/ABC$/
matches ABC at the end of a line or string
.
any single character
/^…$/
matches any three letter word
+
one or more
/AB+/
matches one or more B characters after A (AB, ABB, ABBB, …)
*
zero or more
/AB*/
matches zero or more B characters after A (A, AB, ABB, ABBB, …)
?
zero or one
/AB?/
matches zero or one B character after A (A, AB)
|
alternation
/ABC|DEF/
matches ABC or DEF
\
literal character
/\$50\.00/
literally matches the string $50.00, negates the effects of the metacharacters, $ and .
/
boundary of regular expression
/ABC/
matches any line with ABC in it, forward slash shows beginning and end of regular expression
[ ]
character class
/[0-9]/
matches any digit
-
range
/[0-9][A-Z]/
matches any digit followed by any capitol letter
( )
grouping
/(bob)*by/
matches zero or more of the group "bob" before by (by, bobby, bobbobby, bobbobbobby, …)
Last modified date: 08/10/2022