1 package Mouse::Exporter;
7 # it must be "require", because Mouse::Util depends on Mouse::Exporter
12 my $strict_bits = strict::bits(qw(subs refs vars));
15 $^H |= $strict_bits; # strict->import;
16 ${^WARNING_BITS} = $warnings::Bits{all}; # warnings->import;
20 sub setup_import_methods{
21 my($class, %args) = @_;
23 my $exporting_package = $args{exporting_package} ||= caller();
25 $SPEC{$exporting_package} = \%args;
31 my @stack = ($exporting_package);
33 while(my $current = shift @stack){
34 push @export_from, $current;
36 my $also = $SPEC{$current}{also} or next;
37 push @stack, grep{ !$seen{$_}++ } @{ $also };
41 @export_from = ($exporting_package);
49 my @init_meta_methods;
51 foreach my $package(@export_from){
52 my $spec = $SPEC{$package} or next;
54 if(my $as_is = $spec->{as_is}){
55 foreach my $thingy (@{$as_is}){
56 my($code_package, $code_name, $code);
60 ($code_package, $code_name) = Mouse::Util::get_code_info($code);
64 $code_package = $package;
66 $code = \&{ $code_package . '::' . $code_name };
69 push @all, $code_name;
70 $exports{$code_name} = $code;
71 if($code_package eq $package){
72 push @removables, $code_name;
77 if(my $init_meta = $package->can('init_meta')){
78 if(!grep{ $_ == $init_meta } @init_meta_methods){
79 unshift @init_meta_methods, $init_meta;
83 $args{EXPORTS} = \%exports;
84 $args{REMOVABLES} = \@removables;
86 $args{groups}{all} ||= \@all;
88 if(my $default_list = $args{groups}{default}){
90 foreach my $keyword(@{$default_list}){
91 $default{$keyword} = $exports{$keyword}
92 || confess(qq{The $exporting_package package does not export "$keyword"});
94 $args{DEFAULT} = \%default;
97 $args{groups}{default} ||= \@all;
98 $args{DEFAULT} = $args{EXPORTS};
101 if(@init_meta_methods){
102 $args{INIT_META} = \@init_meta_methods;
108 *{$exporting_package . '::import'} = \&do_import;
109 *{$exporting_package . '::unimport'} = \&do_unimport;
115 # the entity of general import()
117 my($package, @args) = @_;
119 my $spec = $SPEC{$package}
120 || confess("The package $package package does not use Mouse::Exporter");
122 my $into = _get_caller_package(ref($args[0]) ? shift @args : undef);
125 foreach my $arg(@args){
127 Mouse::Util::not_supported("-$arg");
129 elsif($arg =~ s/^://){
130 my $group = $spec->{groups}{$arg}
131 || confess(qq{The $package package does not export the group "$arg"});
132 push @exports, @{$group};
139 $^H |= $strict_bits; # strict->import;
140 ${^WARNING_BITS} = $warnings::Bits{all}; # warnings->import;
142 if($into eq 'main' && !$spec->{_not_export_to_main}){
143 warn qq{$package does not export its sugar to the 'main' package.\n};
147 if($spec->{INIT_META}){
148 foreach my $init_meta(@{$spec->{INIT_META}}){
149 $into->$init_meta(for_class => $into);
152 # _apply_meta_traits($into); # TODO
156 foreach my $keyword(@exports){
158 *{$into.'::'.$keyword} = $spec->{EXPORTS}{$keyword}
159 || confess(qq{The $package package does not export "$keyword"});
163 my $default = $spec->{DEFAULT};
164 while(my($keyword, $code) = each %{$default}){
166 *{$into.'::'.$keyword} = $code;
172 # the entity of general unimport()
174 my($package, $arg) = @_;
176 my $spec = $SPEC{$package}
177 || confess("The package $package does not use Mouse::Exporter");
179 my $from = _get_caller_package($arg);
186 for my $keyword (@{ $spec->{REMOVABLES} }) {
187 my $gv = \$stash->{$keyword};
188 if(ref($gv) eq 'GLOB' && *{$gv}{CODE} == $spec->{EXPORTS}{$keyword}){ # make sure it is from us
189 delete $stash->{$keyword};
195 sub _get_caller_package {
198 # 2 extra level because it's called by import so there's a layer
\r
203 return defined($arg->{into}) ? $arg->{into}
204 : defined($arg->{into_level}) ? scalar caller($offset + $arg->{into_level})
205 : scalar caller($offset);
208 return scalar caller($offset);
218 Mouse - The Mouse Exporter
225 Mouse::Exporter->setup_import_methods(