Regular Expressions 101

(?ix)applies the following effective flags to the remainder of the pattern: gmix

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

x modifier: extended. Ignores unescaped whitespace and comments outside character classes

Definition Group(?(DEFINE) (?<FuncHeader> Func \h ( \w+ \h* $ [^$]* \) ) # Kopfzeile der Funktion ) (?<FuncNegativeAhead> (?! \) ) # Hier wird definiert, was NICHT folgen darf ) )

Group FuncHeader(?<FuncHeader> Func \h ( \w+ \h* $ [^$]* \) ) # Kopfzeile der Funktion )

Func the literal text Func (case insensitive)

\hany horizontal whitespace character

Group 2( \w+ \h* $ [^$]* \) )

\w+any word character, repeated at least once

\h*any horizontal whitespace character, repeated any number of times

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Negated Character Class[^\)]*

*matches any number of characters outside the set below:

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

Comment: Kopfzeile der Funktion

Group FuncNegativeAhead(?<FuncNegativeAhead> (?! \) ) # Hier wird definiert, was NICHT folgen darf )

Negative Lookahead(?! \) )

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

Comment: Hier wird definiert, was NICHT folgen darf

(?&FuncHeader)calls group FuncHeader as a subroutine

(?&FuncNegativeAhead)calls group FuncNegativeAhead 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

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Search reference

Regular Expression

(?ix)(?(DEFINE)
   (?<FuncHeader> Func \h ( \w+ \h* \( [^\)]* \) ) # Kopfzeile der Funktion
   )
   (?<FuncNegativeAhead> (?! \) )                  # Hier wird definiert, was NICHT folgen darf
   )
)
(?&FuncHeader) (?&FuncNegativeAhead)

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