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Filename: //lib/x86_64-linux-gnu//perl-base/attributes.pm
package attributes; our $VERSION = 0.33; @EXPORT_OK = qw(get reftype); @EXPORT = (); %EXPORT_TAGS = (ALL => [@EXPORT, @EXPORT_OK]); use strict; sub croak { require Carp; goto &Carp::croak; } sub carp { require Carp; goto &Carp::carp; } # Hash of SV type (CODE, SCALAR, etc.) to regex matching deprecated # attributes for that type. my %deprecated; my %msg = ( lvalue => 'lvalue attribute applied to already-defined subroutine', -lvalue => 'lvalue attribute removed from already-defined subroutine', const => 'Useless use of attribute "const"', ); sub _modify_attrs_and_deprecate { my $svtype = shift; # After we've removed a deprecated attribute from the XS code, we need to # remove it here, else it ends up in @badattrs. (If we do the deprecation in # XS, we can't control the warning based on *our* caller's lexical settings, # and the warned line is in this package) grep { $deprecated{$svtype} && /$deprecated{$svtype}/ ? do { require warnings; warnings::warnif('deprecated', "Attribute \"$1\" is deprecated, " . "and will disappear in Perl 5.28"); 0; } : $svtype eq 'CODE' && exists $msg{$_} ? do { require warnings; warnings::warnif( 'misc', $msg{$_} ); 0; } : 1 } _modify_attrs(@_); } sub import { @_ > 2 && ref $_[2] or do { require Exporter; goto &Exporter::import; }; my (undef,$home_stash,$svref,@attrs) = @_; my $svtype = uc reftype($svref); my $pkgmeth; $pkgmeth = UNIVERSAL::can($home_stash, "MODIFY_${svtype}_ATTRIBUTES") if defined $home_stash && $home_stash ne ''; my @badattrs; if ($pkgmeth) { my @pkgattrs = _modify_attrs_and_deprecate($svtype, $svref, @attrs); @badattrs = $pkgmeth->($home_stash, $svref, @pkgattrs); if (!@badattrs && @pkgattrs) { require warnings; return unless warnings::enabled('reserved'); @pkgattrs = grep { m/\A[[:lower:]]+(?:\z|\()/ } @pkgattrs; if (@pkgattrs) { for my $attr (@pkgattrs) { $attr =~ s/\(.+\z//s; } my $s = ((@pkgattrs == 1) ? '' : 's'); carp "$svtype package attribute$s " . "may clash with future reserved word$s: " . join(' : ' , @pkgattrs); } } } else { @badattrs = _modify_attrs_and_deprecate($svtype, $svref, @attrs); } if (@badattrs) { croak "Invalid $svtype attribute" . (( @badattrs == 1 ) ? '' : 's') . ": " . join(' : ', @badattrs); } } sub get ($) { @_ == 1 && ref $_[0] or croak 'Usage: '.__PACKAGE__.'::get $ref'; my $svref = shift; my $svtype = uc reftype($svref); my $stash = _guess_stash($svref); $stash = caller unless defined $stash; my $pkgmeth; $pkgmeth = UNIVERSAL::can($stash, "FETCH_${svtype}_ATTRIBUTES") if defined $stash && $stash ne ''; return $pkgmeth ? (_fetch_attrs($svref), $pkgmeth->($stash, $svref)) : (_fetch_attrs($svref)) ; } sub require_version { goto &UNIVERSAL::VERSION } require XSLoader; XSLoader::load(); 1; __END__ #The POD goes here
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