Regular Expressions 101

Group 1({{|}}|(?:(?!{{|}})[^ ])+(?!({{(?2)*?}}|(?:(?!{{|}}).)*)*$))

1st Alternative{{

{{the literal text {{

2nd Alternative}}

}}the literal text }}

3rd Alternative(?:(?!{{|}})[^ ])+(?!({{(?2)*?}}|(?:(?!{{|}}).)*)*$)

Non-Capturing Group(?:(?!{{|}})[^ ])+

+repeats the group contents below at least once:

Negative Lookahead(?!{{|}})

1st Alternative{{

{{the literal text {{

2nd Alternative}}

}}the literal text }}

Negated Character Class[^ ]

the literal (32₁₀ / 40₈ / 20₁₆)

Negative Lookahead(?!({{(?2)*?}}|(?:(?!{{|}}).)*)*$)

Group 2({{(?2)*?}}|(?:(?!{{|}}).)*)*

*repeats the group contents below any number of times:

1st Alternative{{(?2)*?}}

{{the literal text {{

(?2)*?calls group 2 as a subroutine, repeated any number of times

}}the literal text }}

2nd Alternative(?:(?!{{|}}).)*

Non-Capturing Group(?:(?!{{|}}).)*

*repeats the group contents below any number of times:

Negative Lookahead(?!{{|}})

1st Alternative{{

{{the literal text {{

2nd Alternative}}

}}the literal text }}

.any character (except for line terminators)

$end of line

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

({{|}}|(?:(?!{{|}})[^ ])+(?!({{(?2)*?}}|(?:(?!{{|}}).)*)*$))

New

{{}}
aaa {{}}
{{aaa}}
{{aa}} {{bbb}}
{{aaa {{ bb }} }}
{{aa {{ bbb {{ c }} }} }}
{{a{a}{{ b{b}b {{ c }} }} }}