Regular Expressions 101

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

Branch Reset Group(?|(\[[^]]+](?:\h*\[[^]]+])*+)\h*+([^[\n]*(?<=\S))|()([^[\n]*[^\s[]))

1st Alternative(\[[^]]+](?:\h*\[[^]]+])*+)\h*+([^[\n]*(?<=\S))

Group 1(\[[^]]+](?:\h*\[[^]]+])*+)

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Negated Character Class[^]]+

+matches at least one character outside the set below:

]the literal ] (93₁₀ / 135₈ / 5D₁₆)

Non-Capturing Group(?:\h*\[[^]]+])*+

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

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

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Negated Character Class[^]]+

+matches at least one character outside the set below:

]the literal ] (93₁₀ / 135₈ / 5D₁₆)

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

Group 2([^[\n]*(?<=\S))

Negated Character Class[^[\n]*

*matches any number of characters outside the set below:

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

\na line-feed (newline) character (ASCII 10)

Positive Lookbehind(?<=\S)

\Sany non-whitespace character

2nd Alternative()([^[\n]*[^\s[])

Group 1() — does not consume characters

Group 2([^[\n]*[^\s[])

Negated Character Class[^[\n]*

*matches any number of characters outside the set below:

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

\na line-feed (newline) character (ASCII 10)

Negated Character Class[^\s[]

\sany whitespace character

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Global pattern flags

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

\h*(?|(\[[^]]+](?:\h*\[[^]]+])*+)\h*+([^[\n]*(?<=\S))|()([^[\n]*[^\s[]))

New

[C#]I’m looking for [Fm]you [G#]
bluh blih
[C#] [Fm] [G#]
[C#] [Fm] [G#] blah blih bloh