#include <StringConstants.au3> ; to declare the Constants of StringRegExp
#include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate
Local $sRegex = "\((?<arguments>(([^\(\)']*)|(\([^\(\)']*\))|'(.*?)')*)\)"
Local $sString = "Find arguments inside balanced parenthesis." & @CRLF & _
"Regex idea from Marco https://stackoverflow.com/a/10596403/1898524" & @CRLF & _
"" & @CRLF & _
"" & @CRLF & _
"( arg1, arg2, arg3, (arg4), '(pip' )" & @CRLF & _
"trim(( arg1, arg2, arg2a, arg3, (arg4), '(pip' ))" & @CRLF & _
"SELECT ISNULL(string, left(1,13) )" & @CRLF & _
"" & @CRLF & _
"SELECT ISNULL(string,'x' )" & @CRLF & _
"SELECT ISNULL(string, char(13) )" & @CRLF & _
"SELECT ISNULL(string, char(13) ), ISNULL(string, 'x' )" & @CRLF & _
"" & @CRLF & _
"ISNULL( x )" & @CRLF & _
"ISNULL( char(13))" & @CRLF & _
"" & @CRLF & _
"" & @CRLF & _
"SELECT MID(LTRIM(RTRIM(ISNULL(string, char(13)))),4,8) <-- Does not work on a heavily nested function." & @CRLF & _
""
Local $aArray = StringRegExp($sString, $sRegex, $STR_REGEXPARRAYGLOBALFULLMATCH)
Local $aFullArray[0]
For $i = 0 To UBound($aArray) -1
_ArrayConcatenate($aFullArray, $aArray[$i])
Next
$aArray = $aFullArray
; Present the entire match result
_ArrayDisplay($aArray, "Result")
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for AutoIt, please visit: https://www.autoitscript.com/autoit3/docs/functions/StringRegExp.htm