User manual

mikroBasic PRO for dsPIC30/33 and PIC24
MikroElektronika
109
Examples:
count[aeiou]r nds strings 'countar', 'counter', etc. but not 'countbr', 'countcr', etc.
count[^aeiou]r nds strings 'countbr', 'countcr', etc. but not 'countar', 'counter', etc.
Within a list, the "-" character is used to specify a range, so that a-z represents all characters between "a" and "z",
inclusive.
If you want "-" itself to be a member of a class, put it at the start or end of the list, or precede it with a backslash.
If you want ']', you may place it at the start of list or precede it with a backslash.
Examples:
[-az] matches 'a', 'z' and '-'
[az-] matches 'a', 'z' and '-'
[a\-z] matches 'a', 'z' and '-'
[a-z] matches all twenty six small characters from 'a' to 'z'
[\n-\x0D] matches any of #10,#11,#12,#13.
[\d-t] matches any digit, '-' or 't'.
[]-a] matches any char from ']'..'a'.
Metacharacters
Metacharacters are special characters which are the essence of regular expressions. There are different types of
metacharacters, described below.
Metacharacters - Line separators
^ - start of line
$ - end of line
\A - start of text
\Z - end of text
. - any character in line
Examples:
^PORTA - matches string ‘ PORTA ‘ only if it’s at the beginning of line
PORTA$ - matches string ‘ PORTA ‘ only if it’s at the end of line
^PORTA$ - matches string ‘ PORTA ‘ only if it’s the only string in line
PORT.r - matches strings like ‘PORTA’, ‘PORTB’, ‘PORT1’ and so on
The “^” metacharacter by default is only guaranteed to match beginning of the input string/text, and the “$”
metacharacter only at the end. Embedded line separators will not be matched by ^” or “$”.
You may, however, wish to treat a string as a multi-line buffer, such that the “^” will match after any line separator within
the string, and “$” will match before any line separator.
Regular expressions works with line separators as recommended at http://www.unicode.org/unicode/reports/tr18/