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function::ngroups(3stap) — Linux manual page

FUNCT...GROUPS(3stap) A collection of standard strinFUNCT...GROUPS(3stap)

NAME        top

       function::ngroups - Number of subexpressions in the last match.

SYNOPSIS        top

           ngroups:long()

ARGUMENTS        top

       None

DESCRIPTION        top

       returns the number of subexpressions from the last successful use       of the =~ regex matching operator.       Note that this number includes subexpressions which are present in       the regex but did not match any string; for example, given the       regex “a|(b)”, the subexpressions will count the group for (b)       regardless of whether it matched a string or not. Throws an error       if the last use of =~ was a failed match.

SEE ALSO        top

tapset::regex(3stap)

COLOPHON        top

       This page is part of thesystemtap (a tracing and live-system       analysis tool) project.  Information about the project can be       found at ⟨https://sourceware.org/systemtap/⟩.  If you have a bug       report for this manual page, send it to systemtap@sourceware.org.       This page was obtained from the project's upstream Git repository       ⟨git://sourceware.org/git/systemtap.git⟩ on 2025-08-11.  (At that       time, the date of the most recent commit that was found in the       repository was 2025-07-24.)  If you discover any rendering       problems in this HTML version of the page, or you believe there is       a better or more up-to-date source for the page, or you have       corrections or improvements to the information in this COLOPHON       (which isnot part of the original manual page), send a mail to       man-pages@man7.orgSystemTap Tapset Reference      April 2025FUNCT...GROUPS(3stap)

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