1FUNCTION::NGROUPS(3stap)A collection of standard strinFUNCTION::NGROUPS(3stap)
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NAME

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

9           ngroups:long()
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ARGUMENTS

12       None
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DESCRIPTION

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

25       tapset::regex(3stap)
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29SystemTap Tapset Reference       November 2022        FUNCTION::NGROUPS(3stap)