Regular Expression Syntax¶
There are two types of regular expressions: regex (OS_Regex) and sregex (OS_Match).
Regex (OS_Regex) syntax¶
This is a fast and simple library for regular expressions in C.
This library is designed to be simple while still supporting the most common regular expressions.
Supported expressions
Expressions |
Valid characters |
|---|---|
\w |
A-Z, a-z, 0-9, ‘-’, ‘@’ characters |
\d |
0-9 character |
\s |
Spaces ” “ |
\t |
Tabs |
\p |
()*+,-.:;<=>?[]!”’#$%&|{} |
\W |
Anything not w |
\D |
Anything not d |
\S |
Anything not s |
\. |
Anything |
Modifiers
Expressions |
Actions |
|---|---|
+ |
To match one or more times |
* |
To match zero or more times |
Special characters
Expressions |
Actions |
|---|---|
^ |
To specify the beginning of the text |
$ |
To specify the end of the text |
| |
To create a logical or between multiple patterns |
Characters escaping
To utilize the following characters they must be escaped with: \
$ |
( |
) |
\ |
| |
|---|---|---|---|---|
\$ |
\( |
\) |
\ \ |
\| |
Sregex (OS_Match) syntax¶
This is faster than OS_Regex, but only supports simple string matching and the following special characters.
Special characters
Expressions |
Actions |
|---|---|
^ |
To specify the beginning of the text |
$ |
To specify the end of the text |
| |
To create a logic: or, between multiple patterns |
! |
To negate the expression |