/usr/share/perl5/Moose/Autobox/Code.pm is in libmoose-autobox-perl 0.16-1.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 | package Moose::Autobox::Code;
# ABSTRACT: the Code role
use Moose::Role 'with';
use Moose::Autobox;
use namespace::autoclean;
our $VERSION = '0.16';
with 'Moose::Autobox::Ref';
sub curry {
my ($f, @a) = @_;
return sub { $f->(@a, @_) }
}
sub rcurry {
my ($f, @a) = @_;
return sub { $f->(@_, @a) }
}
sub compose {
my ($f, $f2, @rest) = @_;
return $f if !$f2;
return (sub { $f2->($f->(@_)) })->compose(@rest);
}
sub disjoin {
my ($f, $f2) = @_;
return sub { $f->(@_) || $f2->(@_) }
}
sub conjoin {
my ($f, $f2) = @_;
return sub { $f->(@_) && $f2->(@_) }
}
# fixed point combinators
sub u {
my $f = shift;
sub { $f->($f, @_) };
}
sub y {
my $f = shift;
(sub { my $h = shift; sub { $f->(($h->u)->())->(@_) } }->u)->();
}
1;
__END__
=pod
=encoding UTF-8
=head1 NAME
Moose::Autobox::Code - the Code role
=head1 VERSION
version 0.16
=head1 SYNOPSIS
use Moose::Autobox;
my $adder = sub { $_[0] + $_[1] };
my $add_2 = $adder->curry(2);
$add_2->(2); # returns 4
# create a recursive subroutine
# using the Y combinator
*factorial = sub {
my $f = shift;
sub {
my $n = shift;
return 1 if $n < 2;
return $n * $f->($n - 1);
}
}->y;
factorial(10) # returns 3628800
=head1 DESCRIPTION
This is a role to describe operations on the Code type.
=head1 METHODS
=over 4
=item C<curry (@values)>
=item C<rcurry (@values)>
=item C<conjoin (\&sub)>
=item C<disjoin (\&sub)>
=item C<compose (@subs)>
This will take a list of C<@subs> and compose them all into a single
subroutine where the output of one sub will be the input of another.
=item C<y>
=for :stopwords combinator
This implements the Y combinator.
=item C<u>
This implements the U combinator.
=back
=over 4
=item C<meta>
=back
=head1 SEE ALSO
=over 4
=item L<http://en.wikipedia.org/wiki/Fixed_point_combinator>
=item L<http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/20469>
=back
=head1 SUPPORT
Bugs may be submitted through L<the RT bug tracker|https://rt.cpan.org/Public/Dist/Display.html?Name=Moose-Autobox>
(or L<bug-Moose-Autobox@rt.cpan.org|mailto:bug-Moose-Autobox@rt.cpan.org>).
There is also a mailing list available for users of this distribution, at
L<http://lists.perl.org/list/moose.html>.
There is also an irc channel available for users of this distribution, at
L<C<#moose> on C<irc.perl.org>|irc://irc.perl.org/#moose>.
=head1 AUTHOR
Stevan Little <stevan.little@iinteractive.com>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2006 by Infinity Interactive, Inc.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut
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