regex101: Regular expression capture group captures — separate group names for captured/non-captured

1st Alternative(?<!(?:\\{2})*\\)(?:(?<begin_capture>[\(])(?<begin_capture_modifier>(?=[<][a-z_A-Z]+[>])|(?!\?(?:<?[=!]|:)))|(?<begin_non_capture>\((?=\?(?:<?[=!]|:))))

Negative Lookbehind(?<!(?:\\{2})*\\)

Non-Capturing Group(?:\\{2})*

*repeats the group contents below any number of times:

\\{2}the literal \ (92₁₀ / 134₈ / 5C₁₆) , repeated exactly 2 times

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

Non-Capturing Group(?:(?<begin_capture>[\(])(?<begin_capture_modifier>(?=[<][a-z_A-Z]+[>])|(?!\?(?:<?[=!]|:)))|(?<begin_non_capture>\((?=\?(?:<?[=!]|:))))

1st Alternative(?<begin_capture>[\(])(?<begin_capture_modifier>(?=[<][a-z_A-Z]+[>])|(?!\?(?:<?[=!]|:)))

Group begin_capture(?<begin_capture>[\(])

Character Class[\(]

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Group begin_capture_modifier(?<begin_capture_modifier>(?=[<][a-z_A-Z]+[>])|(?!\?(?:<?[=!]|:)))

1st Alternative(?=[<][a-z_A-Z]+[>])

Positive Lookahead(?=[<][a-z_A-Z]+[>])

Character Class[<]

<the literal < (60₁₀ / 74₈ / 3C₁₆)

Character Class[a-z_A-Z]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Character Class[>]

>the literal > (62₁₀ / 76₈ / 3E₁₆)

2nd Alternative(?!\?(?:<?[=!]|:))

Negative Lookahead(?!\?(?:<?[=!]|:))

\?the literal ? (63₁₀ / 77₈ / 3F₁₆)

Non-Capturing Group(?:<?[=!]|:)

1st Alternative<?[=!]

<?optionally matches the literal < (60₁₀ / 74₈ / 3C₁₆)

Character Class[=!]

=the literal = (61₁₀ / 75₈ / 3D₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

2nd Alternative:

:the literal : (58₁₀ / 72₈ / 3A₁₆)

2nd Alternative(?<begin_non_capture>\((?=\?(?:<?[=!]|:)))

Group begin_non_capture(?<begin_non_capture>\((?=\?(?:<?[=!]|:)))

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Positive Lookahead(?=\?(?:<?[=!]|:))

\?the literal ? (63₁₀ / 77₈ / 3F₁₆)

Non-Capturing Group(?:<?[=!]|:)

1st Alternative<?[=!]

<?optionally matches the literal < (60₁₀ / 74₈ / 3C₁₆)

Character Class[=!]

=the literal = (61₁₀ / 75₈ / 3D₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

2nd Alternative:

2nd Alternative(?:(?<end>\)))

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

Search reference

Regular Expression

(?<!(?:\\{2})*\\)(?:(?<begin_capture>[\(])(?<begin_capture_modifier>(?=[<][a-z_A-Z]+[>])|(?!\?(?:<?[=!]|:)))|(?<begin_non_capture>\((?=\?(?:<?[=!]|:))))|(?:(?<end>\)))

Regular Expressions 101

Regular Expression

Unit Tests