regex101: PCRE (Legacy) Match Workspace

Pro

\Gstart of current search

Condition(?(?=^)\^?((?:(?2)\|)*(?![^|)$])|(?:(?2)\|)*?(?=(?<![^^|(])((\w|$(?:\||(?3))*$)*(?![^|$)]))(?=(.*)))(?!(?:(?=\2((?(5)\5\|(?2)|)))){1,50}?(?=\2\5\|(?2)(.*))(?:(?=.*?(?=\4$)\5\|((?(7)\7)((?:$(?1)|\|(?2)|$)*?\w)(?=.*\6$)))(?8)(?=.*\4$))*+(?!(?8)(?=.*\4$)))))

Uses the first branch if the lookaround matches

Positive Lookahead(?=^)

^start of line

If the condition is true, match this branch:\^?((?:(?2)\|)*(?![^|)$])|(?:(?2)\|)*?(?=(?<![^^|(])((\w|$(?:\||(?3))*$)*(?![^|$)]))(?=(.*)))(?!(?:(?=\2((?(5)\5\|(?2)|)))){1,50}?(?=\2\5\|(?2)(.*))(?:(?=.*?(?=\4$)\5\|((?(7)\7)((?:$(?1)|\|(?2)|$)*?\w)(?=.*\6$)))(?8)(?=.*\4$))*+(?!(?8)(?=.*\4$))))

\^?optionally matches the literal ^ (94₁₀ / 136₈ / 5E₁₆)

Group 1((?:(?2)\|)*(?![^|)$])|(?:(?2)\|)*?(?=(?<![^^|(])((\w|$(?:\||(?3))*$)*(?![^|$)]))(?=(.*)))(?!(?:(?=\2((?(5)\5\|(?2)|)))){1,50}?(?=\2\5\|(?2)(.*))(?:(?=.*?(?=\4$)\5\|((?(7)\7)((?:$(?1)|\|(?2)|$)*?\w)(?=.*\6$)))(?8)(?=.*\4$))*+(?!(?8)(?=.*\4$))))

1st Alternative(?:(?2)\|)*(?![^|)$])

Non-Capturing Group(?:(?2)\|)*

*repeats the group contents below any number of times:

(?2)calls group 2 as a subroutine

\|the literal | (124₁₀ / 174₈ / 7C₁₆)

Negative Lookahead(?![^|)$])

Negated Character Class[^|)$]

|the literal | (124₁₀ / 174₈ / 7C₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

2nd Alternative(?:(?2)\|)*?(?=(?<![^^|(])((\w|$(?:\||(?3))*$)*(?![^|$)]))(?=(.*)))(?!(?:(?=\2((?(5)\5\|(?2)|)))){1,50}?(?=\2\5\|(?2)(.*))(?:(?=.*?(?=\4$)\5\|((?(7)\7)((?:$(?1)|\|(?2)|$)*?\w)(?=.*\6$)))(?8)(?=.*\4$))*+(?!(?8)(?=.*\4$)))

Non-Capturing Group(?:(?2)\|)*?

*?repeats the group contents below any number of times:

(?2)calls group 2 as a subroutine

\|the literal | (124₁₀ / 174₈ / 7C₁₆)

Positive Lookahead(?=(?<![^^|(])((\w|$(?:\||(?3))*$)*(?![^|$)]))(?=(.*)))

Negative Lookbehind(?<![^^|(])

Negated Character Class[^^|(]

^the literal ^ (94₁₀ / 136₈ / 5E₁₆)

|the literal | (124₁₀ / 174₈ / 7C₁₆)

(the literal ( (40₁₀ / 50₈ / 28₁₆)

Group 2((\w|$(?:\||(?3))*$)*(?![^|$)]))

Group 3(\w|$(?:\||(?3))*$)*

*repeats the group contents below any number of times:

1st Alternative\w

\wany word character

2nd Alternative$(?:\||(?3))*$

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Non-Capturing Group(?:\||(?3))*

*repeats the group contents below any number of times:

1st Alternative\|

\|the literal | (124₁₀ / 174₈ / 7C₁₆)

2nd Alternative(?3)

(?3)calls group 3 as a subroutine

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

Negative Lookahead(?![^|$)])

Negated Character Class[^|$)]

|the literal | (124₁₀ / 174₈ / 7C₁₆)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

Positive Lookahead(?=(.*))

Group 4(.*)

.*any character (except for line terminators), repeated any number of times

Negative Lookahead(?!(?:(?=\2((?(5)\5\|(?2)|)))){1,50}?(?=\2\5\|(?2)(.*))(?:(?=.*?(?=\4$)\5\|((?(7)\7)((?:$(?1)|\|(?2)|$)*?\w)(?=.*\6$)))(?8)(?=.*\4$))*+(?!(?8)(?=.*\4$)))

Non-Capturing Group(?:(?=\2((?(5)\5\|(?2)|)))){1,50}?

Positive Lookahead(?=\2\5\|(?2)(.*))

Non-Capturing Group(?:(?=.*?(?=\4$)\5\|((?(7)\7)((?:$(?1)|\|(?2)|$)*?\w)(?=.*\6$)))(?8)(?=.*\4$))*+

Negative Lookahead(?!(?8)(?=.*\4$))

(?8)calls group 8 as a subroutine

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

25 tokens

Regular Expression

\G(?(?=^)\^?((?:(?2)\|)*(?![^|)$])|(?:(?2)\|)*?(?=(?<![^^|(])((\w|\((?:\||(?3))*\))*(?![^|$)]))(?=(.*)))(?!(?:(?=\2((?(5)\5\|(?2)|)))){1,50}?(?=\2\5\|(?2)(.*))(?:(?=.*?(?=\4$)\5\|((?(7)\7)((?:\((?1)|\|(?2)|\))*?\w)(?=.*\6$)))(?8)(?=.*\4$))*+(?!(?8)(?=.*\4$)))))(?8)

Unit Tests

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