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FUNCTION::MATCHED(3stap) A collection of standard strin FUNCTION::MATCHED(3stap)

NAME

function::matched - Return a given matched subexpression.

SYNOPSIS

    matched:string(n:long)

ARGUMENTS

n
index to the subexpression to return. 0 corresponds to the entire regular expression.

DESCRIPTION

returns the content of the n'th subexpression of the last successful use of the =~ regex matching operator. Returns an empty string if the n'th subexpression was not matched (e.g. due to alternation). Throws an error if the last use of =~ was a failed match, or if fewer than n subexpressions are present in the original regexp.

SEE ALSO0

tapset::regex(3stap)
May 2021 SystemTap Tapset Reference