Tie::H...Capture(3perl) Perl Programmers Reference GuideTie::H...Capture(3perl)
NAME
Tie::Hash::NamedCapture - Named regexp capture buffers
SYNOPSIS
tie my %hash, "Tie::Hash::NamedCapture";
# %hash now behaves like %+
tie my %hash, "Tie::Hash::NamedCapture", all => 1;
# %hash now access buffers from regexp in $qr like %-
DESCRIPTION
This module is used to implement the special hashes "%+" and "%-", but
it can be used to tie other variables as you choose.
When the "all" parameter is provided, then the tied hash elements will
be array refs listing the contents of each capture buffer whose name is
the same as the associated hash key. If none of these buffers were
involved in the match, the contents of that array ref will be as many
"undef" values as there are capture buffers with that name. In other
words, the tied hash will behave as "%-".
When the "all" parameter is omitted or false, then the tied hash
elements will be the contents of the leftmost defined buffer with the
name of the associated hash key. In other words, the tied hash will
behave as "%+".
The keys of "%-"-like hashes correspond to all buffer names found in the
regular expression; the keys of "%+"-like hashes list only the names of
buffers that have captured (and that are thus associated to defined
values).
This implementation has been moved into the core executable, but you can
still load this module for backward compatibility.
SEE ALSO
perlreapi, re, "Pragmatic Modules" in perlmodlib, "%+" in perlvar, "%-"
in perlvar.
perl v5.40.1 2026-08-30 Tie::H...Capture(3perl)
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