#include <StringConstants.au3> ; to declare the Constants of StringRegExp
#include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate
Local $sRegex = "(?x)(" & @CRLF & _
" \(" & @CRLF & _
" # Match all but characters `\`, `(` or `)`" & @CRLF & _
" (?> [^\\()]" & @CRLF & _
" | \\." & @CRLF & _
" | (?1)" & @CRLF & _
" )*" & @CRLF & _
" \)" & @CRLF & _
")" & @CRLF & _
""
Local $sString = "SHOULD MATCH:" & @CRLF & _
"()" & @CRLF & _
"(())" & @CRLF & _
"((()))" & @CRLF & _
"(\() (\))" & @CRLF & _
"(\(\)\)\)\))" & @CRLF & _
"" & @CRLF & _
"SHOULD NOT MATCH:" & @CRLF & _
")" & @CRLF & _
"(" & @CRLF & _
"((((\)\)\)\)" & @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