regex101: helix word motion

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Non-Capturing Group(?: .?\n+ | [[:alnum:]_](?=[^[:alnum:]_\s]) | [^[:alnum:]_\s](?=[[:alnum:]_]) | [^\S\n](?=[\S\n]) | )

1st Alternative .?\n+

.?optionally matches any character (except for line terminators)

\n+a line-feed (newline) character (ASCII 10), repeated at least once

2nd Alternative [[:alnum:]_](?=[^[:alnum:]_\s])

Character Class[[:alnum:]_]

[:alnum:]an alphanumeric character [a-zA-Z0-9]

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Positive Lookahead(?=[^[:alnum:]_\s])

Negated Character Class[^[:alnum:]_\s]

[:alnum:]an alphanumeric character [a-zA-Z0-9]

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

\sany whitespace character

3rd Alternative [^[:alnum:]_\s](?=[[:alnum:]_])

Negated Character Class[^[:alnum:]_\s]

[:alnum:]an alphanumeric character [a-zA-Z0-9]

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

\sany whitespace character

Positive Lookahead(?=[[:alnum:]_])

Character Class[[:alnum:]_]

[:alnum:]an alphanumeric character [a-zA-Z0-9]

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

4th Alternative [^\S\n](?=[\S\n])

Negated Character Class[^\S\n]

\Sany non-whitespace character

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

Positive Lookahead(?=[\S\n])

Character Class[\S\n]

\Sany non-whitespace character

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

5th Alternative — matches an empty string

Group 1( (?: [[:alnum:]_]+ | [^[:alnum:]_\s]+ | ) [^\S\n]* )

Non-Capturing Group(?: [[:alnum:]_]+ | [^[:alnum:]_\s]+ | )

1st Alternative [[:alnum:]_]+

Character Class[[:alnum:]_]+

+matches at least one character from the set below:

[:alnum:]an alphanumeric character [a-zA-Z0-9]

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

2nd Alternative [^[:alnum:]_\s]+

Negated Character Class[^[:alnum:]_\s]+

+matches at least one character outside the set below:

[:alnum:]an alphanumeric character [a-zA-Z0-9]

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

\sany whitespace character

3rd Alternative — matches an empty string

Negated Character Class[^\S\n]*

*matches any number of characters outside the set below:

\Sany non-whitespace character

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

Global pattern flags

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

X modifier: eXtra. A \ followed by a letter with no special meaning causes an error

25 tokens

Regular Expression

(?:
 .?\n+ |
 [[:alnum:]_](?=[^[:alnum:]_\s]) |
 [^[:alnum:]_\s](?=[[:alnum:]_]) |
 [^\S\n](?=[\S\n]) |
)
(
(?:
 [[:alnum:]_]+ |
 [^[:alnum:]_\s]+ |
)
[^\S\n]*
)

Regular Expressions 101

Regular Expression

Unit Tests