X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?p=gitmo%2FMouse.git;a=blobdiff_plain;f=lib%2FMouse.pm;h=bff08e5594e8a87ef9dd7a78b60f46825ffd832b;hp=112f808812c8c8c0a636106347f35eb13d4223f4;hb=2b68f76d78d96325821e9a6360c3639f8c5637df;hpb=8bc2760b16d8ad03dedb54b8d2c6a2b4e6eaad2e diff --git a/lib/Mouse.pm b/lib/Mouse.pm index 112f808..bff08e5 100644 --- a/lib/Mouse.pm +++ b/lib/Mouse.pm @@ -1,32 +1,55 @@ package Mouse; -use strict; -use warnings; -use 5.006; -use base 'Exporter'; +use 5.006_002; -our $VERSION = '0.30'; +use Mouse::Exporter; # enables strict and warnings -use Carp 'confess'; -use Scalar::Util 'blessed'; -use Mouse::Util qw(load_class is_class_loaded); +our $VERSION = '0.40_03'; -use Mouse::Meta::Attribute; -use Mouse::Meta::Module; # class_of() -use Mouse::Meta::Class; -use Mouse::Object; -use Mouse::Util::TypeConstraints; +use Carp qw(confess); +use Scalar::Util qw(blessed); -our @EXPORT = qw(extends has before after around override super blessed confess with); +use Mouse::Util qw(load_class is_class_loaded get_code_package not_supported); -our %is_removable = map{ $_ => undef } @EXPORT; -delete $is_removable{blessed}; -delete $is_removable{confess}; +use Mouse::Meta::Module; +use Mouse::Meta::Class; +use Mouse::Meta::Role; +use Mouse::Meta::Attribute; +use Mouse::Object; +use Mouse::Util::TypeConstraints (); + +Mouse::Exporter->setup_import_methods( + as_is => [qw( + extends with + has + before after around + override super + augment inner + ), + \&Scalar::Util::blessed, + \&Carp::confess, + ], +); + +# XXX: for backward compatibility +our @EXPORT = qw( + extends with + has + before after around + override super + augment inner + blessed confess +); sub extends { Mouse::Meta::Class->initialize(scalar caller)->superclasses(@_) } sub has { my $meta = Mouse::Meta::Class->initialize(scalar caller); - $meta->add_attribute(@_); + my $name = shift; + + $meta->throw_error(q{Usage: has 'name' => ( key => value, ... )}) + if @_ % 2; # odd number of arguments + + $meta->add_attribute($_ => @_) for ref($name) ? @{$name} : $name; } sub before { @@ -70,133 +93,75 @@ our @SUPER_ARGS; sub super { # This check avoids a recursion loop - see # t/100_bugs/020_super_recursion.t - return if defined $SUPER_PACKAGE && $SUPER_PACKAGE ne caller(); - return unless $SUPER_BODY; $SUPER_BODY->(@SUPER_ARGS); + return if defined $SUPER_PACKAGE && $SUPER_PACKAGE ne caller(); + return if !defined $SUPER_BODY; + $SUPER_BODY->(@SUPER_ARGS); } sub override { - my $meta = Mouse::Meta::Class->initialize(caller); - my $pkg = $meta->name; - - my $name = shift; - my $code = shift; + # my($name, $method) = @_; + Mouse::Meta::Class->initialize(scalar caller)->add_override_method_modifier(@_); +} - my $body = $pkg->can($name) - or confess "You cannot override '$name' because it has no super method"; +our %INNER_BODY; +our %INNER_ARGS; - $meta->add_method($name => sub { - local $SUPER_PACKAGE = $pkg; - local @SUPER_ARGS = @_; - local $SUPER_BODY = $body; +sub inner { + my $pkg = caller(); + if ( my $body = $INNER_BODY{$pkg} ) { + my $args = $INNER_ARGS{$pkg}; + local $INNER_ARGS{$pkg}; + local $INNER_BODY{$pkg}; + return $body->(@{$args}); + } + else { + return; + } +} - $code->(@_); - }); +sub augment { + #my($name, $method) = @_; + Mouse::Meta::Class->initialize(scalar caller)->add_augment_method_modifier(@_); } sub init_meta { - # This used to be called as a function. This hack preserves - # backwards compatibility. - if ( $_[0] ne __PACKAGE__ ) { - return __PACKAGE__->init_meta( - for_class => $_[0], - base_class => $_[1], - metaclass => $_[2], - ); - } - shift; my %args = @_; my $class = $args{for_class} - or Carp::croak( - "Cannot call init_meta without specifying a for_class"); + or confess("Cannot call init_meta without specifying a for_class"); + my $base_class = $args{base_class} || 'Mouse::Object'; my $metaclass = $args{metaclass} || 'Mouse::Meta::Class'; - Carp::croak("The Metaclass $metaclass must be a subclass of Mouse::Meta::Class.") - unless $metaclass->isa('Mouse::Meta::Class'); - - # make a subtype for each Mouse class - class_type($class) - unless find_type_constraint($class); - my $meta = $metaclass->initialize($class); - $meta->superclasses($base_class) - unless $meta->superclasses; $meta->add_method(meta => sub{ - return Mouse::Meta::Class->initialize(ref($_[0]) || $_[0]); + return $metaclass->initialize(ref($_[0]) || $_[0]); }); + $meta->superclasses($base_class) + unless $meta->superclasses; - return $meta; -} - -sub import { - my $class = shift; - - strict->import; - warnings->import; - - my $opts = do { - if (ref($_[0]) && ref($_[0]) eq 'HASH') { - shift @_; - } else { - +{ }; - } - }; - my $level = delete $opts->{into_level}; - $level = 0 unless defined $level; - my $caller = caller($level); - - # we should never export to main - if ($caller eq 'main') { - warn qq{$class does not export its sugar to the 'main' package.\n}; - return; - } - - Mouse->init_meta( - for_class => $caller, - ); + # make a class type for each Mouse class + Mouse::Util::TypeConstraints::class_type($class) + unless Mouse::Util::TypeConstraints::find_type_constraint($class); - if (@_) { - __PACKAGE__->export_to_level( $level+1, $class, @_); - } else { - # shortcut for the common case of no type character - no strict 'refs'; - for my $keyword (@EXPORT) { - *{ $caller . '::' . $keyword } = *{__PACKAGE__ . '::' . $keyword}; - } - } + return $meta; } -sub unimport { - my $caller = caller; - - my $stash = do{ - no strict 'refs'; - \%{$caller . '::'} - }; - - for my $keyword (@EXPORT) { - my $code; - if(exists $is_removable{$keyword} - && ($code = $caller->can($keyword)) - && (Mouse::Util::get_code_info($code))[0] eq __PACKAGE__){ - - delete $stash->{$keyword}; - } - } -} 1; - __END__ =head1 NAME Mouse - Moose minus the antlers +=head1 VERSION + +This document describes Mouse version 0.40_03 + =head1 SYNOPSIS package Point; @@ -237,11 +202,10 @@ latter, if possible. Mouse aims to alleviate this by providing a subset of Moose's functionality, faster. -We're also going as light on dependencies as possible. -L or L is required -if you want support for L, L, and L. +We're also going as light on dependencies as possible. Mouse currently has +B except for testing modules. -=head2 MOOSE COMPAT +=head2 MOOSE COMPATIBILITY Compatibility with Moose has been the utmost concern. Fewer than 1% of the tests fail when run against Moose instead of Mouse. Mouse code coverage is also @@ -259,6 +223,8 @@ Moose, if you run into weird errors, it would be worth running: to see if the bug is caused by Mouse. Moose's diagnostics and validation are also much better. +See also L for compatibility and incompatibility with Moose. + =head2 MouseX Please don't copy MooseX code to MouseX. If you need extensions, you really @@ -267,60 +233,54 @@ should upgrade to Moose. We don't need two parallel sets of extensions! If you really must write a Mouse extension, please contact the Moose mailing list or #moose on IRC beforehand. -=head2 Maintenance - -The original author of this module has mostly stepped down from maintaining -Mouse. See L. -If you would like to help maintain this module, please get in touch with us. - =head1 KEYWORDS -=head2 meta -> Mouse::Meta::Class +=head2 C<< $object->meta -> Mouse::Meta::Class >> Returns this class' metaclass instance. -=head2 extends superclasses +=head2 C<< extends superclasses >> Sets this class' superclasses. -=head2 before (method|methods) => Code +=head2 C<< before (method|methods) => CodeRef >> Installs a "before" method modifier. See L or L. Use of this feature requires L! -=head2 after (method|methods) => Code +=head2 C<< after (method|methods) => CodeRef >> Installs an "after" method modifier. See L or L. Use of this feature requires L! -=head2 around (method|methods) => Code +=head2 C<< around (method|methods) => CodeRef >> Installs an "around" method modifier. See L or L. Use of this feature requires L! -=head2 has (name|names) => parameters +=head2 C<< has (name|names) => parameters >> Adds an attribute (or if passed an arrayref of names, multiple attributes) to this class. Options: =over 4 -=item is => ro|rw +=item C<< is => ro|rw|bare >> If specified, inlines a read-only/read-write accessor with the same name as the attribute. -=item isa => TypeConstraint +=item C<< isa => TypeConstraint >> Provides type checking in the constructor and accessor. The following types are -supported. Any unknown type is taken to be a class check (e.g. isa => -'DateTime' would accept only L objects). +supported. Any unknown type is taken to be a class check +(e.g. C<< isa => 'DateTime' >> would accept only L objects). Any Item Bool Undef Defined Value Num Int Str ClassName Ref ScalarRef ArrayRef HashRef CodeRef RegexpRef GlobRef @@ -329,85 +289,90 @@ supported. Any unknown type is taken to be a class check (e.g. isa => For more documentation on type constraints, see L. -=item required => 0|1 +=item C<< required => Bool >> Whether this attribute is required to have a value. If the attribute is lazy or has a builder, then providing a value for the attribute in the constructor is optional. -=item init_arg => Str | Undef +=item C<< init_arg => Str | Undef >> Allows you to use a different key name in the constructor. If undef, the -attribue can't be passed to the constructor. +attribute can't be passed to the constructor. -=item default => Value | CodeRef +=item C<< default => Value | CodeRef >> Sets the default value of the attribute. If the default is a coderef, it will be invoked to get the default value. Due to quirks of Perl, any bare reference is forbidden, you must wrap the reference in a coderef. Otherwise, all instances will share the same reference. -=item lazy => 0|1 +=item C<< lazy => Bool >> If specified, the default is calculated on demand instead of in the constructor. -=item predicate => Str +=item C<< predicate => Str >> Lets you specify a method name for installing a predicate method, which checks that the attribute has a value. It will not invoke a lazy default or builder method. -=item clearer => Str +=item C<< clearer => Str >> Lets you specify a method name for installing a clearer method, which clears the attribute's value from the instance. On the next read, lazy or builder will be invoked. -=item handles => HashRef|ArrayRef +=item C<< handles => HashRef|ArrayRef >> Lets you specify methods to delegate to the attribute. ArrayRef forwards the given method names to method calls on the attribute. HashRef maps local method names to remote method names called on the attribute. Other forms of L, such as regular expression and coderef, are not yet supported. -=item weak_ref => 0|1 +=item C<< weak_ref => Bool >> Lets you automatically weaken any reference stored in the attribute. Use of this feature requires L! -=item trigger => CodeRef +=item C<< trigger => CodeRef >> Any time the attribute's value is set (either through the accessor or the constructor), the trigger is called on it. The trigger receives as arguments the instance, the new value, and the attribute instance. -Mouse 0.05 supported more complex triggers, but this behavior is now removed. - -=item builder => Str +=item C<< builder => Str >> Defines a method name to be called to provide the default value of the attribute. C<< builder => 'build_foo' >> is mostly equivalent to C<< default => sub { $_[0]->build_foo } >>. -=item auto_deref => 0|1 +=item C<< auto_deref => Bool >> Allows you to automatically dereference ArrayRef and HashRef attributes in list context. In scalar context, the reference is returned (NOT the list length or bucket status). You must specify an appropriate type constraint to use auto_deref. -=item lazy_build => 0|1 +=item C<< lazy_build => Bool >> -Automatically define lazy => 1 as well as builder => "_build_$attr", clearer => -"clear_$attr', predicate => 'has_$attr' unless they are already defined. +Automatically define the following options: + + has $attr => ( + # ... + lazy => 1 + builder => "_build_$attr", + clearer => "clear_$attr", + predicate => "has_$attr", + ); =back -=head2 confess error -> BOOM +=head2 C<< confess(message) -> BOOM >> L for your convenience. -=head2 blessed value -> ClassName | undef +=head2 C<< blessed(value) -> ClassName | undef >> L for your convenience. @@ -423,31 +388,29 @@ You may use L to replace the superclass list. Please unimport Mouse (C) so that if someone calls one of the keywords (such as L) it will break loudly instead breaking subtly. -=head1 FUNCTIONS +=head1 SOURCE CODE ACCESS -=head2 load_class Class::Name +We have a public git repository: -This will load a given C (or die if it's not loadable). -This function can be used in place of tricks like -C or using C. + git clone git://jules.scsys.co.uk/gitmo/Mouse.git -=head2 is_class_loaded Class::Name -> Bool +=head1 DEPENDENCIES -Returns whether this class is actually loaded or not. It uses a heuristic which -involves checking for the existence of C<$VERSION>, C<@ISA>, and any -locally-defined method. +Perl 5.6.2 or later. -=head1 SOURCE CODE ACCESS +=head1 SEE ALSO -We have a public git repo: +L - git clone git://jules.scsys.co.uk/gitmo/Mouse.git +L + +L =head1 AUTHORS -Shawn M Moore, C<< >> +Shawn M Moore, Esartak at gmail.comE -Yuval Kogman, C<< >> +Yuval Kogman, Enothingmuch at woobling.orgE tokuhirom @@ -455,17 +418,15 @@ Yappo wu-lee +Goro Fuji (gfx) Egfuji at cpan.orgE + with plenty of code borrowed from L and L =head1 BUGS -There is a known issue with Mouse on 5.6.2 regarding the @ISA tests. Until -this is resolve the minimum version of Perl for Mouse is set to 5.8.0. Patches -to resolve these tests are more than welcome. - -Please report any bugs through RT: email -C, or browse -L. +All complex software has bugs lurking in it, and this module is no exception. +Please report any bugs to C, or through the web +interface at L =head1 COPYRIGHT AND LICENSE