regex101: PCRE (Legacy) Match Workspace

1st Alternative(?:^fix(?:es)?(?:\s+bugzilla)(?:\s+(?:issues?|bugs?))?\s+(#?\d+(?:[\s,\+&and]+#?\d+)*))

Non-Capturing Group(?:^fix(?:es)?(?:\s+bugzilla)(?:\s+(?:issues?|bugs?))?\s+(#?\d+(?:[\s,\+&and]+#?\d+)*))

^start of string

fixthe literal text fix (case insensitive)

Non-Capturing Group(?:es)?

?repeats the group contents below at most once:

esthe literal text es (case insensitive)

Non-Capturing Group(?:\s+bugzilla)

\s+any whitespace character, repeated at least once

bugzillathe literal text bugzilla (case insensitive)

Non-Capturing Group(?:\s+(?:issues?|bugs?))?

?repeats the group contents below at most once:

\s+any whitespace character, repeated at least once

Non-Capturing Group(?:issues?|bugs?)

1st Alternativeissues?

issuethe literal text issue (case insensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case insensitive)

2nd Alternativebugs?

bugthe literal text bug (case insensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case insensitive)

\s+any whitespace character, repeated at least once

Group 1(#?\d+(?:[\s,\+&and]+#?\d+)*)

#?optionally matches the literal # (35₁₀ / 43₈ / 23₁₆)

\d+a digit, repeated at least once

Non-Capturing Group(?:[\s,\+&and]+#?\d+)*

*repeats the group contents below any number of times:

Character Class[\s,\+&and]+

+matches at least one character from the set below:

\sany whitespace character

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

athe literal a (97₁₀ / 141₈ / 61₁₆) (case insensitive)

nthe literal n (110₁₀ / 156₈ / 6E₁₆) (case insensitive)

dthe literal d (100₁₀ / 144₈ / 64₁₆) (case insensitive)

#?optionally matches the literal # (35₁₀ / 43₈ / 23₁₆)

\d+a digit, repeated at least once

2nd Alternative (?:bugzilla\s+(?:(?:issues?|bugs?)\s+)?(#?\d+(?:[\s,\+&and]+#?\d+)*))

the literal ↵ (10₁₀ / 12₈ / A₁₆)

Non-Capturing Group(?:bugzilla\s+(?:(?:issues?|bugs?)\s+)?(#?\d+(?:[\s,\+&and]+#?\d+)*))

bugzillathe literal text bugzilla (case insensitive)

\s+any whitespace character, repeated at least once

Non-Capturing Group(?:(?:issues?|bugs?)\s+)?

?repeats the group contents below at most once:

Non-Capturing Group(?:issues?|bugs?)

1st Alternativeissues?

issuethe literal text issue (case insensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case insensitive)

2nd Alternativebugs?

bugthe literal text bug (case insensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case insensitive)

\s+any whitespace character, repeated at least once

Group 2(#?\d+(?:[\s,\+&and]+#?\d+)*)

#?optionally matches the literal # (35₁₀ / 43₈ / 23₁₆)

\d+a digit, repeated at least once

Non-Capturing Group(?:[\s,\+&and]+#?\d+)*

*repeats the group contents below any number of times:

Character Class[\s,\+&and]+

+matches at least one character from the set below:

\sany whitespace character

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

athe literal a (97₁₀ / 141₈ / 61₁₆) (case insensitive)

nthe literal n (110₁₀ / 156₈ / 6E₁₆) (case insensitive)

dthe literal d (100₁₀ / 144₈ / 64₁₆) (case insensitive)

#?optionally matches the literal # (35₁₀ / 43₈ / 23₁₆)

\d+a digit, repeated at least once

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

Search reference

Regular Expression

(?:^fix(?:es)?(?:\s+bugzilla)(?:\s+(?:issues?|bugs?))?\s+(#?\d+(?:[\s,\+&and]+#?\d+)*))|
(?:bugzilla\s+(?:(?:issues?|bugs?)\s+)?(#?\d+(?:[\s,\+&and]+#?\d+)*))

New

Fix bugzilla issue 12564: add std.range.walkBack

Regular Expressions 101

Regular Expression

Extraction