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# Copyright (c) 1997-2007 Graham Barr . All rights reserved. |
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# This program is free software; you can redistribute it and/or |
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# modify it under the same terms as Perl itself. |
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# |
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# Maintained since 2013 by Paul Evans |
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package Scalar::Util; |
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use strict; |
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require Exporter; |
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our @ISA = qw(Exporter); |
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our @EXPORT_OK = qw( |
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blessed refaddr reftype weaken unweaken isweak |
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dualvar isdual isvstring looks_like_number openhandle readonly set_prototype |
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tainted |
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); |
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our $VERSION = "1.42_002"; |
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our $XS_VERSION = $VERSION; |
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$VERSION = eval $VERSION; |
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require XSLoader; |
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XSLoader::load('Scalar::Util', $XS_VERSION); |
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our @EXPORT_FAIL; |
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require Sub::Util; |
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unless (defined &weaken) { |
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push @EXPORT_FAIL, qw(weaken); |
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} |
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unless (defined &isweak) { |
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push @EXPORT_FAIL, qw(isweak isvstring); |
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} |
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unless (defined &isvstring) { |
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push @EXPORT_FAIL, qw(isvstring); |
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} |
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sub export_fail { |
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if (grep { /^(?:weaken|isweak)$/ } @_ ) { |
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require Carp; |
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Carp::croak("Weak references are not implemented in the version of perl"); |
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} |
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if (grep { /^isvstring$/ } @_ ) { |
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require Carp; |
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Carp::croak("Vstrings are not implemented in the version of perl"); |
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} |
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@_; |
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} |
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# set_prototype has been moved to Sub::Util with a different interface |
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sub set_prototype(&$) |
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{ |
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my ( $code, $proto ) = @_; |
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return Sub::Util::set_prototype( $proto, $code ); |
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} |
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1; |
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__END__ |