/usr/share/perl5/Perl6/Junction.pm is in libperl6-junction-perl 1.60000-1.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 | package Perl6::Junction;
use strict;
use Perl6::Junction::All;
use Perl6::Junction::Any;
use Perl6::Junction::None;
use Perl6::Junction::One;
require Exporter;
our $VERSION = '1.60000';
our @ISA = qw/ Exporter /;
my @routines = qw/ all any none one /;
our @EXPORT_OK = @routines;
our %EXPORT_TAGS = ( ALL => [@routines] );
sub all {
return Perl6::Junction::All->new(@_);
}
sub any {
return Perl6::Junction::Any->new(@_);
}
sub none {
return Perl6::Junction::None->new(@_);
}
sub one {
return Perl6::Junction::One->new(@_);
}
1;
__END__
=head1 NAME
Perl6::Junction - Perl6 style Junction operators in Perl5.
=head1 SYNOPSIS
use Perl6::Junction qw/ all any none one /;
if (any(@grant) eq 'su') {
...
}
if (all($foo, $bar) >= 10) {
...
}
if (qr/^\d+$/ == all(@answers)) {
...
}
if (all(@input) <= @limits) {
...
}
if (none(@pass) eq 'password') {
...
}
if (one(@answer) == 42) {
...
}
=head1 DESCRIPTION
This is a lightweight module which provides 'Junction' operators, the most
commonly used being C<any> and C<all>.
Inspired by the Perl6 design docs,
L<http://dev.perl.org/perl6/doc/design/exe/E06.html>.
Provides a limited subset of the functionality of L<Quantum::Superpositions>,
see L</"SEE ALSO"> for comment.
Notice in the L</SYNOPSIS> above, that if you want to match against a
regular expression, you must use C<==> or C<!=>. B<Not> C<=~> or C<!~>. You
must also use a regex object, such as C<qr/\d/>, not a plain regex such as
C</\d/>.
=head1 SUBROUTINES
=head2 all()
Returns an object which overloads the following operators:
'<', '<=', '>', '>=', '==', '!=',
'lt', 'le', 'gt', 'ge', 'eq', 'ne',
Returns true only if B<all> arguments test true according to the operator
used.
=head2 any()
Returns an object which overloads the following operators:
'<', '<=', '>', '>=', '==', '!=',
'lt', 'le', 'gt', 'ge', 'eq', 'ne',
Returns true if B<any> argument tests true according to the operator used.
=head2 none()
Returns an object which overloads the following operators:
'<', '<=', '>', '>=', '==', '!=',
'lt', 'le', 'gt', 'ge', 'eq', 'ne',
Returns true only if B<no> argument tests true according to the operator
used.
=head2 one()
Returns an object which overloads the following operators:
'<', '<=', '>', '>=', '==', '!=',
'lt', 'le', 'gt', 'ge', 'eq', 'ne',
Returns true only if B<one and only one> argument tests true according to
the operator used.
=head1 ALTERING JUNCTIONS
You cannot alter junctions. Instead, you can create new junctions out of old
junctions. You can do this by calling the C<values> method on a junction.
my $numbers = any(qw/1 2 3 4 5/);
print $numbers == 3 ? 'Yes' : 'No'; # Yes
$numbers = any( grep { $_ != 3 } $numbers->values );
print $numbers == 3 ? 'Yes' : 'No'; # No
=head1 EXPORT
'all', 'any', 'none', 'one', as requested.
All subroutines can be called by its fully qualified name, if you don't
want to export them.
use Perl6::Junction;
if (Perl6::Junction::any( @questions )) {
...
}
=head1 WARNING
When comparing against a regular expression, you must remember to use a
regular expression object: C<qr/\d/> B<Not> C</d/>. You must also use either
C<==> or C<!=>. This is because C<=~> and C<!~> cannot be overriden.
=head1 TO DO
Add overloading for arithmetic operators, such that this works:
$result = any(2,3,4) * 2;
if ($result == 8) {...}
=head1 SUPPORT / BUGS
Submit to the CPAN bugtracker L<http://rt.cpan.org>
=head1 SEE ALSO
L<Quantum::Superpositions> provides the same functionality as this, and
more. However, this module provides this limited functionality at a much
greater runtime speed, with my benchmarks showing between 500% and 6000%
improvment.
L<http://dev.perl.org/perl6/doc/design/exe/E06.html> - "The Wonderful World
of Junctions".
=head1 AUTHOR
Carl Franks
=head1 ACKNOWLEDGEMENTS
Thanks to C<Curtis "Ovid" Poe> for the L</"ALTERING JUNCTIONS"> changes in
release C<0.40000>.
=head1 COPYRIGHT AND LICENSE
Copyright 2005, Carl Franks. All rights reserved.
This library is free software; you can redistribute it and/or modify it under
the same terms as Perl itself (L<perlgpl>, L<perlartistic>).
=cut
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