Regular Expressions 101

Explanation

Pro

Group if(?<if>#if\((?<ifContents>[^\)]+)\))

#ifthe literal text #if (case insensitive)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Group ifContents(?<ifContents>[^\)]+)

Negated Character Class[^\)]+

+matches at least one character outside the set below:

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

Group ifResult(?<ifResult>[\s\S]+?)

Character Class[\s\S]+?

+?matches at least one character from the set below:

\sany whitespace character

\Sany non-whitespace character

Positive Lookahead(?=#elif|#else|#end)

1st Alternative#elif

#elifthe literal text #elif (case insensitive)

2nd Alternative#else

#elsethe literal text #else (case insensitive)

3rd Alternative#end

#endthe literal text #end (case insensitive)

Group elIf(?<elIf>#elif[\s\S]+?(?=#else|#end))?

?repeats the group contents below at most once:

#elifthe literal text #elif (case insensitive)

Character Class[\s\S]+?

+?matches at least one character from the set below:

\sany whitespace character

\Sany non-whitespace character

Positive Lookahead(?=#else|#end)

1st Alternative#else

#elsethe literal text #else (case insensitive)

2nd Alternative#end

#endthe literal text #end (case insensitive)

Group else(?<else>#else([\s\S]+?(?=#end)))?

?repeats the group contents below at most once:

#elsethe literal text #else (case insensitive)

Group 6([\s\S]+?(?=#end))

Character Class[\s\S]+?

+?matches at least one character from the set below:

\sany whitespace character

\Sany non-whitespace character

Positive Lookahead(?=#end)

#endthe literal text #end (case insensitive)

Character Class[\s\S]*?

*?matches any number of characters from the set below:

\sany whitespace character

\Sany non-whitespace character

#endthe literal text #end (case insensitive)

Global pattern flags

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

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

Unit Test Summary

No unit tests

Add a test to get started

Quick Reference

27 tokens

Regular Expression

(?<if>#if\((?<ifContents>[^\)]+)\))(?<ifResult>[\s\S]+?)(?=#elif|#else|#end)(?<elIf>#elif[\s\S]+?(?=#else|#end))?(?<else>#else([\s\S]+?(?=#end)))?[\s\S]*?#end

Unit Tests

There are no unit tests.