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package Perl::Critic::Policy::References::ProhibitDoubleSigils;
use 5.010001;
use strict;
use warnings;
use Readonly;
use Perl::Critic::Utils qw{ :severities };
use parent 'Perl::Critic::Policy';
our $VERSION = '1.156';
#-----------------------------------------------------------------------------
Readonly::Scalar my $DESC => q{Double-sigil dereference};
Readonly::Scalar my $EXPL => [ 228 ];
#-----------------------------------------------------------------------------
sub supported_parameters { return () }
sub default_severity { return $SEVERITY_LOW }
sub default_themes { return qw(core pbp cosmetic) }
sub applies_to { return 'PPI::Token::Cast' }
#-----------------------------------------------------------------------------
sub violates {
my ( $self, $elem, undef ) = @_;
my $content = $elem->content();
return if $content eq q{\\};
return if $content =~ /[@ $ % * &] [*]/xms;
return if $content eq q{$#*}; ## no critic (RequireInterpolationOfMetachars)
my $sib = $elem->snext_sibling;
return if !$sib;
if ( ! $sib->isa('PPI::Structure::Block') && ! $sib->isa('PPI::Structure::Subscript') ) {
return $self->violation( $DESC, $EXPL, $elem );
}
return; #ok!
}
1;
__END__
#-----------------------------------------------------------------------------
=pod
=head1 NAME
Perl::Critic::Policy::References::ProhibitDoubleSigils - Write C<@{ $array_ref }> instead of C<@$array_ref>.
=head1 AFFILIATION
This Policy is part of the core L<Perl::Critic|Perl::Critic>
distribution.
=head1 DESCRIPTION
When dereferencing a reference, put braces around the reference to
separate the sigils. Especially for newbies, the braces eliminate any
potential confusion about the relative precedence of the sigils.
push @$array_ref, 'foo', 'bar', 'baz'; #not ok
push @{ $array_ref }, 'foo', 'bar', 'baz'; #ok
foreach ( keys %$hash_ref ){} #not ok
foreach ( keys %{ $hash_ref } ){} #ok
=head1 CONFIGURATION
This Policy is not configurable except for the standard options.
=head1 AUTHOR
Jeffrey Ryan Thalhammer <jeff@imaginative-software.com>
=head1 COPYRIGHT
Copyright (c) 2005-2023 Imaginative Software Systems. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the same terms as Perl itself. The full text of this license
can be found in the LICENSE file included with this module.
=cut
# Local Variables:
# mode: cperl
# cperl-indent-level: 4
# fill-column: 78
# indent-tabs-mode: nil
# c-indentation-style: bsd
# End:
# ex: set ts=8 sts=4 sw=4 tw=78 ft=perl expandtab shiftround :
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