Initial Commit

database/perl/lib/Tie/Hash/NamedCapture.pm

@@ -0,0 +1,49 @@
+use strict;
+package Tie::Hash::NamedCapture;
+
+our $VERSION = "0.13";
+
+__END__
+
+=head1 NAME
+
+Tie::Hash::NamedCapture - Named regexp capture buffers
+
+=head1 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 %-
+
+=head1 DESCRIPTION
+
+This module is used to implement the special hashes C<%+> and C<%->, but it
+can be used to tie other variables as you choose.
+
+When the C<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 C<undef> values
+as there are capture buffers with that name. In other words, the tied hash
+will behave as C<%->.
+
+When the C<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
+C<%+>.
+
+The keys of C<%->-like hashes correspond to all buffer names found in the
+regular expression; the keys of C<%+>-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.
+
+=head1 SEE ALSO
+
+L<perlreapi>, L<re>, L<perlmodlib/Pragmatic Modules>, L<perlvar/"%+">,
+L<perlvar/"%-">.
+
+=cut