/usr/share/perl5/Attean/IteratorSequence.pm is in libattean-perl 0.017-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 | use v5.14;
use warnings;
=head1 NAME
Attean::IteratorSequence - Iterator implementation backed by zero or more sub-iterators
=head1 VERSION
This document describes Attean::IteratorSequence version 0.017
=head1 SYNOPSIS
use v5.14;
use Attean;
my $iter = Attean::IteratorSequence->new(iterators => [$iter1, $iter2]);
=head1 DESCRIPTION
The Attean::IteratorSequence class represents a typed iterator that is backed
by zero or more sub-iterators. When iterated over, it will return all the
elements of all of its sub-iterators, in order, before returning undef.
It conforms to the L<Attean::API::Iterator> role.
The Attean::IteratorSequence constructor requires two named arguments:
=over 4
=item iterators
An array reference containing zero or more L<Attean::API::Iterator> objects.
=item item_type
A string representing the type of the items that will be returned from the
iterator.
=back
=head1 METHODS
=over 4
=cut
package Attean::IteratorSequence 0.017 {
use Moo;
use Types::Standard qw(ArrayRef ConsumerOf);
use namespace::clean;
with 'Attean::API::Iterator';
has iterators => (is => 'ro', isa => ArrayRef[ConsumerOf['Attean::API::Iterator']], default => sub { [] });
=item C<< next >>
Returns the iterator's next item, or undef upon reaching the end of iteration.
=cut
sub next {
my $self = shift;
my $list = $self->iterators;
while (1) {
return unless (scalar(@$list));
my $iter = $list->[0];
my $item = $iter->next;
unless (defined($item)) {
shift(@$list);
next;
}
return $item;
}
}
=item C<< push( $iterator ) >>
Adds the new C<< $iterator >> to the end of the array of sub-iterators.
After this call, C<< $iterator >> will be owned by the IteratorSequence,
so making any method calls on C<< $iterator >> after this point may produce
unexpected results.
=cut
sub push {
my $self = shift;
my $iter = shift;
push(@{ $self->iterators }, $iter);
return;
}
}
1;
__END__
=back
=head1 BUGS
Please report any bugs or feature requests to through the GitHub web interface
at L<https://github.com/kasei/attean/issues>.
=head1 SEE ALSO
L<http://www.perlrdf.org/>
=head1 AUTHOR
Gregory Todd Williams C<< <gwilliams@cpan.org> >>
=head1 COPYRIGHT
Copyright (c) 2014--2016 Gregory Todd Williams.
This program is free software; you can redistribute it and/or modify it under
the same terms as Perl itself.
=cut
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