/usr/share/perl5/Mojo/Base.pm is in libmojolicious-perl 2.23-1.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 | package Mojo::Base;
use strict;
use warnings;
# Mojo modules are modern!
require feature;
# No imports because we get subclassed, a lot!
require Carp;
# "Kids, you tried your best and you failed miserably.
# The lesson is, never try."
sub import {
my $class = shift;
return unless my $flag = shift;
# No limits!
no strict 'refs';
no warnings 'redefine';
# Base
if ($flag eq '-base') { $flag = $class }
# Strict
elsif ($flag eq '-strict') { $flag = undef }
# Module
else {
my $file = $flag;
$file =~ s/::|'/\//g;
require "$file.pm" unless $flag->can('new');
}
# ISA
if ($flag) {
my $caller = caller;
push @{"${caller}::ISA"}, $flag;
# Can haz?
*{"${caller}::has"} = sub { attr($caller, @_) };
}
# Mojo modules are strict!
strict->import;
warnings->import;
feature->import(':5.10');
}
sub new {
my $class = shift;
bless @_ ? @_ > 1 ? {@_} : {%{$_[0]}} : {}, ref $class || $class;
}
# Performance is very important for something as often used as accessors,
# so we optimize them by compiling our own code, don't be scared, we have
# tests for every single case
sub attr {
my $class = shift;
my $attrs = shift;
my $default = shift;
# Check arguments
Carp::croak('Attribute generator called with too many arguments') if @_;
return unless $class && $attrs;
$class = ref $class || $class;
# Check default
Carp::croak('Default has to be a code reference or constant value')
if ref $default && ref $default ne 'CODE';
# Create attributes
$attrs = [$attrs] unless ref $attrs eq 'ARRAY';
my $ws = ' ';
for my $attr (@$attrs) {
Carp::croak(qq/Attribute "$attr" invalid/)
unless $attr =~ /^[a-zA-Z_]\w*$/;
# Header
my $code = "sub {\n";
# No value
$code .= "${ws}if (\@_ == 1) {\n";
unless (defined $default) {
# Return value
$code .= "$ws${ws}return \$_[0]->{'$attr'};\n";
}
else {
# Return value
$code .= "$ws${ws}return \$_[0]->{'$attr'} ";
$code .= "if exists \$_[0]->{'$attr'};\n";
# Return default value
$code .= "$ws${ws}return \$_[0]->{'$attr'} = ";
$code .=
ref $default eq 'CODE'
? '$default->($_[0])'
: '$default';
$code .= ";\n";
}
$code .= "$ws}\n";
# Store value
$code .= "$ws\$_[0]->{'$attr'} = \$_[1];\n";
# Return invocant
$code .= "${ws}\$_[0];\n";
# Footer
$code .= '};';
# We compile custom attribute code for speed
no strict 'refs';
no warnings 'redefine';
*{"${class}::$attr"} = eval $code;
# This should never happen (hopefully)
Carp::croak("Mojo::Base compiler error: \n$code\n$@\n") if $@;
# Debug mode
if ($ENV{MOJO_BASE_DEBUG}) {
warn "\nATTRIBUTE: $class->$attr\n";
warn "$code\n\n";
}
}
}
1;
__END__
=head1 NAME
Mojo::Base - Minimal base class for Mojo projects
=head1 SYNOPSIS
package Cat;
use Mojo::Base -base;
has 'mouse';
has paws => 4;
has [qw/ears eyes/] => 2;
package Tiger;
use Mojo::Base 'Cat';
has stripes => 42;
package main;
my $mew = Cat->new(mouse => 'Mickey');
say $mew->paws;
say $mew->paws(5)->paws;
my $rawr = Tiger->new(stripes => 23);
say $rawr->ears * $rawr->stripes;
=head1 DESCRIPTION
L<Mojo::Base> is a simple base class for L<Mojo> projects.
# Automatically enables "strict", "warnings" and Perl 5.10 features
use Mojo::Base -strict;
use Mojo::Base -base;
use Mojo::Base 'SomeBaseClass';
All three forms save a lot of typing.
# use Mojo::Base -strict;
use strict;
use warnings;
use feature ':5.10';
# use Mojo::Base -base;
use strict;
use warnings;
use feature ':5.10';
use Mojo::Base;
push @ISA, 'Mojo::Base';
sub has { Mojo::Base::attr(__PACKAGE__, @_) }
# use Mojo::Base 'SomeBaseClass';
use strict;
use warnings;
use feature ':5.10';
require SomeBaseClass;
push @ISA, 'SomeBaseClass';
use Mojo::Base;
sub has { Mojo::Base::attr(__PACKAGE__, @_) }
=head1 FUNCTIONS
L<Mojo::Base> exports the following functions if imported with the C<-base>
flag or a base class.
=head2 C<has>
has 'name';
has [qw/name1 name2 name3/];
has name => 'foo';
has name => sub {...};
has [qw/name1 name2 name3/] => 'foo';
has [qw/name1 name2 name3/] => sub {...};
Create attributes, just like the C<attr> method.
=head1 METHODS
L<Mojo::Base> implements the following methods.
=head2 C<new>
my $instance = BaseSubClass->new;
my $instance = BaseSubClass->new(name => 'value');
my $instance = BaseSubClass->new({name => 'value'});
This base class provides a basic object constructor.
You can pass it either a hash or a hash reference with attribute values.
=head2 C<attr>
__PACKAGE__->attr('name');
__PACKAGE__->attr([qw/name1 name2 name3/]);
__PACKAGE__->attr(name => 'foo');
__PACKAGE__->attr(name => sub {...});
__PACKAGE__->attr([qw/name1 name2 name3/] => 'foo');
__PACKAGE__->attr([qw/name1 name2 name3/] => sub {...});
Create attributes.
An arrayref can be used to create more than one attribute.
Pass an optional second argument to set a default value, it should be a
constant or a sub reference.
The sub reference will be excuted at accessor read time if there's no set
value.
=head1 DEBUGGING
You can set the C<MOJO_BASE_DEBUG> environment variable to get some advanced
diagnostics information printed to C<STDERR>.
MOJO_BASE_DEBUG=1
=head1 SEE ALSO
L<Mojolicious>, L<Mojolicious::Guides>, L<http://mojolicio.us>.
=cut
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