Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression

/
/
gmxXi

Test String

Code Generator

Generated Code

#include <StringConstants.au3> ; to declare the Constants of StringRegExp #include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate Local $sRegex = "(?mxXi)# ./configure parser" & @CRLF & _ "" & @CRLF & _ "^(?:" & @CRLF & _ " (?:configuring[[:space:]]for[[:space:]](.+))" & @CRLF & _ " |" & @CRLF & _ " (?:" & @CRLF & _ " checking[[:space:]]" & @CRLF & _ " (?:" & @CRLF & _ " (?:build|host)" & @CRLF & _ " [[:space:]]system[[:space:]]type" & @CRLF & _ " |" & @CRLF & _ " how[[:space:]]to[[:space:]](.+?)" & @CRLF & _ " |" & @CRLF & _ " for[[:space:]](.+?)" & @CRLF & _ " |" & @CRLF & _ " whether[[:space:]](?:to[[:space:]])?(.+?)" & @CRLF & _ " )[\.]{3}" & @CRLF & _ " )" & @CRLF & _ " (?:" & @CRLF & _ " [[:space:]]+" & @CRLF & _ " (?:" & @CRLF & _ " $" & @CRLF & _ " |" & @CRLF & _ " (?:" & @CRLF & _ " (yes)" & @CRLF & _ " |" & @CRLF & _ " (no)" & @CRLF & _ " |" & @CRLF & _ " (?<!^)(.*)(?=$|\n)" & @CRLF & _ " )" & @CRLF & _ " )" & @CRLF & _ " )?.*" & @CRLF & _ ")$" & @CRLF & _ "" & @CRLF & _ "# ^(?:(?:configuring[[:space:]]for[[:space:]](.+))|(?:checking[[:space:]](?:(?:build|host)[[:space:]]system[[:space:]]type|how[[:space:]]to[[:space:]](.+?)|for[[:space:]](.+?)|whether[[:space:]](?:to[[:space:]])?(.+?))[\.]{3})(?:[[:space:]]+(?:$|(?:(yes)|(no)|(?<!^)(.*)(?=$|\n))))?.*)$" Local $sString = "configuring for zsh 5.7.1-test-2" & @CRLF & _ "checking build system type... x86_64-apple-darwin17.7.0" & @CRLF & _ "checking host system type... x86_64-apple-darwin17.7.0" & @CRLF & _ "checking for gcc... gcc" & @CRLF & _ "checking whether the C compiler works... yes" & @CRLF & _ "checking for C compiler default output file name... a.out" & @CRLF & _ "checking for suffix of executables... " & @CRLF & _ "checking whether we are cross compiling... no" & @CRLF & _ "checking for suffix of object files... o" & @CRLF & _ "checking whether we are using the GNU C compiler... yes" & @CRLF & _ "checking whether gcc accepts -g... yes" & @CRLF & _ "checking for gcc option to accept ISO C89... none needed" & @CRLF & _ "checking for special C compiler options needed for large files... no" & @CRLF & _ "checking for _FILE_OFFSET_BITS value needed for large files... no" & @CRLF & _ "checking how to run the C preprocessor... gcc -E" & @CRLF & _ "checking for an ANSI C-conforming const... yes" & @CRLF & _ "checking for gcc option to accept ANSI C... " & @CRLF & _ "checking whether to use prototypes... yes" & @CRLF & _ "checking for grep that handles long lines and -e... /usr/local/bin/ggrep" & @CRLF & _ "checking for egrep... /usr/local/bin/ggrep -E" & @CRLF & _ "checking for ANSI C header files... yes" & @CRLF & _ "checking for sys/types.h... yes" & @CRLF & _ "checking for sys/stat.h... yes" & @CRLF & _ "checking for stdlib.h... yes" & @CRLF & _ "checking for string.h... yes" & @CRLF & _ "checking for memory.h... yes" & @CRLF & _ "checking for strings.h... yes" & @CRLF & _ "checking for inttypes.h... yes" & @CRLF & _ "checking for stdint.h... yes" & @CRLF & _ "checking for unistd.h... yes" & @CRLF & _ "checking for size_t... yes" & @CRLF & _ "checking for working alloca.h... yes" 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