/usr/lib/perl5/Mouse/Exporter.pm is in libmouse-perl 0.97-1.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 | package Mouse::Exporter;
use strict;
use warnings;
use Carp ();
my %SPEC;
my $strict_bits;
my $warnings_extra_bits;
BEGIN{
$strict_bits = strict::bits(qw(subs refs vars));
$warnings_extra_bits = warnings::bits(FATAL => 'recursion');
}
# it must be "require", because Mouse::Util depends on Mouse::Exporter,
# which depends on Mouse::Util::import()
require Mouse::Util;
sub import{
# strict->import;
$^H |= $strict_bits;
# warnings->import('all', FATAL => 'recursion');
${^WARNING_BITS} |= $warnings::Bits{all};
${^WARNING_BITS} |= $warnings_extra_bits;
return;
}
sub setup_import_methods{
my($class, %args) = @_;
my $exporting_package = $args{exporting_package} ||= caller();
my($import, $unimport) = $class->build_import_methods(%args);
Mouse::Util::install_subroutines($exporting_package,
import => $import,
unimport => $unimport,
export_to_level => sub {
my($package, $level, undef, @args) = @_; # the third argument is redundant
$package->import({ into_level => $level + 1 }, @args);
},
export => sub {
my($package, $into, @args) = @_;
$package->import({ into => $into }, @args);
},
);
return;
}
sub build_import_methods{
my($self, %args) = @_;
my $exporting_package = $args{exporting_package} ||= caller();
$SPEC{$exporting_package} = \%args;
# canonicalize args
my @export_from;
if($args{also}){
my %seen;
my @stack = ($exporting_package);
while(my $current = shift @stack){
push @export_from, $current;
my $also = $SPEC{$current}{also} or next;
push @stack, grep{ !$seen{$_}++ } ref($also) ? @{ $also } : $also;
}
}
else{
@export_from = ($exporting_package);
}
my %exports;
my @removables;
my @all;
my @init_meta_methods;
foreach my $package(@export_from){
my $spec = $SPEC{$package} or next;
if(my $as_is = $spec->{as_is}){
foreach my $thingy (@{$as_is}){
my($code_package, $code_name, $code);
if(ref($thingy)){
$code = $thingy;
($code_package, $code_name) = Mouse::Util::get_code_info($code);
}
else{
$code_package = $package;
$code_name = $thingy;
no strict 'refs';
$code = \&{ $code_package . '::' . $code_name };
}
push @all, $code_name;
$exports{$code_name} = $code;
if($code_package eq $package){
push @removables, $code_name;
}
}
}
if(my $init_meta = $package->can('init_meta')){
if(!grep{ $_ == $init_meta } @init_meta_methods){
push @init_meta_methods, $init_meta;
}
}
}
$args{EXPORTS} = \%exports;
$args{REMOVABLES} = \@removables;
$args{groups}{all} ||= \@all;
if(my $default_list = $args{groups}{default}){
my %default;
foreach my $keyword(@{$default_list}){
$default{$keyword} = $exports{$keyword}
|| Carp::confess(qq{The $exporting_package package does not export "$keyword"});
}
$args{DEFAULT} = \%default;
}
else{
$args{groups}{default} ||= \@all;
$args{DEFAULT} = $args{EXPORTS};
}
if(@init_meta_methods){
$args{INIT_META} = \@init_meta_methods;
}
return (\&do_import, \&do_unimport);
}
# the entity of general import()
sub do_import {
my($package, @args) = @_;
my $spec = $SPEC{$package}
|| Carp::confess("The package $package package does not use Mouse::Exporter");
my $into = _get_caller_package(ref($args[0]) ? shift @args : undef);
my @exports;
my @traits;
while(@args){
my $arg = shift @args;
if($arg =~ s/^-//){
if($arg eq 'traits'){
push @traits, ref($args[0]) ? @{shift(@args)} : shift(@args);
}
else {
Mouse::Util::not_supported("-$arg");
}
}
elsif($arg =~ s/^://){
my $group = $spec->{groups}{$arg}
|| Carp::confess(qq{The $package package does not export the group "$arg"});
push @exports, @{$group};
}
else{
push @exports, $arg;
}
}
# strict->import;
$^H |= $strict_bits;
# warnings->import('all', FATAL => 'recursion');
${^WARNING_BITS} |= $warnings::Bits{all};
${^WARNING_BITS} |= $warnings_extra_bits;
if($spec->{INIT_META}){
my $meta;
foreach my $init_meta(@{$spec->{INIT_META}}){
$meta = $package->$init_meta(for_class => $into);
}
if(@traits){
my $type = (split /::/, ref $meta)[-1]; # e.g. "Class" for "My::Meta::Class"
@traits = map{
ref($_)
? $_
: Mouse::Util::resolve_metaclass_alias($type => $_, trait => 1)
} @traits;
require Mouse::Util::MetaRole;
Mouse::Util::MetaRole::apply_metaroles(
for => $into,
Mouse::Util::is_a_metarole($into->meta)
? (role_metaroles => { role => \@traits })
: (class_metaroles => { class => \@traits }),
);
}
}
elsif(@traits){
Carp::confess("Cannot provide traits when $package does not have an init_meta() method");
}
if(@exports){
my @export_table;
foreach my $keyword(@exports){
push @export_table,
$keyword => ($spec->{EXPORTS}{$keyword}
|| Carp::confess(qq{The $package package does not export "$keyword"})
);
}
Mouse::Util::install_subroutines($into, @export_table);
}
else{
Mouse::Util::install_subroutines($into, %{$spec->{DEFAULT}});
}
return;
}
# the entity of general unimport()
sub do_unimport {
my($package, $arg) = @_;
my $spec = $SPEC{$package}
|| Carp::confess("The package $package does not use Mouse::Exporter");
my $from = _get_caller_package($arg);
my $stash = do{
no strict 'refs';
\%{$from . '::'}
};
for my $keyword (@{ $spec->{REMOVABLES} }) {
next if !exists $stash->{$keyword};
my $gv = \$stash->{$keyword};
# remove what is from us
if(ref($gv) eq 'GLOB' && *{$gv}{CODE} == $spec->{EXPORTS}{$keyword}){
delete $stash->{$keyword};
}
}
return;
}
sub _get_caller_package {
my($arg) = @_;
# We need one extra level because it's called by import so there's a layer
# of indirection
if(ref $arg){
return defined($arg->{into}) ? $arg->{into}
: defined($arg->{into_level}) ? scalar caller(1 + $arg->{into_level})
: scalar caller(1);
}
else{
return scalar caller(1);
}
}
1;
__END__
=head1 NAME
Mouse::Exporter - make an import() and unimport() just like Mouse.pm
=head1 VERSION
This document describes Mouse version 0.97
=head1 SYNOPSIS
package MyApp::Mouse;
use Mouse ();
use Mouse::Exporter;
Mouse::Exporter->setup_import_methods(
as_is => [ 'has_rw', 'other_sugar', \&Some::Random::thing ],
also => 'Mouse',
);
sub has_rw {
my $meta = caller->meta;
my ( $name, %options ) = @_;
$meta->add_attribute(
$name,
is => 'rw',
%options,
);
}
# then later ...
package MyApp::User;
use MyApp::Mouse;
has 'name';
has_rw 'size';
thing;
no MyApp::Mouse;
=head1 DESCRIPTION
This module encapsulates the exporting of sugar functions in a
C<Mouse.pm>-like manner. It does this by building custom C<import>,
C<unimport> methods for your module, based on a spec you provide.
Note that C<Mouse::Exporter> does not provide the C<with_meta> option,
but you can easily get the metaclass by C<< caller->meta >> as L</SYNOPSIS> shows.
=head1 METHODS
=head2 C<< setup_import_methods( ARGS ) >>
=head2 C<< build_import_methods( ARGS ) -> (\&import, \&unimport) >>
=head1 SEE ALSO
L<Moose::Exporter>
=cut
|