X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FMoo.pm;h=f4023cba31ee26110257b58578e0843eb0b83992;hb=64284a1b21ce94c351f555f0e74929e4ff8ad323;hp=c146af8d0137e5ddf1f330d5e8ccb23b4e66cfbb;hpb=1e82707e52d3062e3da1cf4379bd13a315473efc;p=gitmo%2FMoo.git diff --git a/lib/Moo.pm b/lib/Moo.pm index c146af8..f4023cb 100644 --- a/lib/Moo.pm +++ b/lib/Moo.pm @@ -3,10 +3,13 @@ package Moo; use strictures 1; use Moo::_Utils; use B 'perlstring'; +use Sub::Defer (); -our $VERSION = '0.009012'; # 0.9.12 +our $VERSION = '0.091001'; # 0.91.1 $VERSION = eval $VERSION; +require Moo::sification; + our %MAKERS; sub import { @@ -14,49 +17,76 @@ sub import { my $class = shift; strictures->import; return if $MAKERS{$target}; # already exported into this package - *{_getglob("${target}::extends")} = sub { + _install_coderef "${target}::extends" => sub { _load_module($_) for @_; # Can't do *{...} = \@_ or 5.10.0's mro.pm stops seeing @ISA @{*{_getglob("${target}::ISA")}{ARRAY}} = @_; + if (my $old = delete $Moo::MAKERS{$target}{constructor}) { + delete _getstash($target)->{new}; + Moo->_constructor_maker_for($target) + ->register_attribute_specs(%{$old->all_attribute_specs}); + } }; - *{_getglob("${target}::with")} = sub { - { local $@; require Moo::Role; } - die "Only one role supported at a time by with" if @_ > 1; - Moo::Role->apply_role_to_package($target, $_[0]); + _install_coderef "${target}::with" => sub { + require Moo::Role; + Moo::Role->apply_roles_to_package($target, $_[0]); }; $MAKERS{$target} = {}; - *{_getglob("${target}::has")} = sub { + _install_coderef "${target}::has" => sub { my ($name, %spec) = @_; - ($MAKERS{$target}{accessor} ||= do { - { local $@; require Method::Generate::Accessor; } - Method::Generate::Accessor->new - })->generate_method($target, $name, \%spec); $class->_constructor_maker_for($target) ->register_attribute_specs($name, \%spec); + $class->_accessor_maker_for($target) + ->generate_method($target, $name, \%spec); }; foreach my $type (qw(before after around)) { - *{_getglob "${target}::${type}"} = sub { - { local $@; require Class::Method::Modifiers; } + _install_coderef "${target}::${type}" => sub { + require Class::Method::Modifiers; _install_modifier($target, $type, @_); }; } { no strict 'refs'; @{"${target}::ISA"} = do { - {; local $@; require Moo::Object; } ('Moo::Object'); + require Moo::Object; ('Moo::Object'); } unless @{"${target}::ISA"}; } + if ($INC{'Moo/HandleMoose.pm'}) { + Moo::HandleMoose::inject_fake_metaclass_for($target); + } +} + +sub _accessor_maker_for { + my ($class, $target) = @_; + return unless $MAKERS{$target}; + $MAKERS{$target}{accessor} ||= do { + my $maker_class = do { + if (my $m = do { + if (my $defer_target = + (Sub::Defer::defer_info($target->can('new'))||[])->[0] + ) { + my ($pkg) = ($defer_target =~ /^(.*)::[^:]+$/); + $MAKERS{$pkg} && $MAKERS{$pkg}{accessor}; + } else { + undef; + } + }) { + ref($m); + } else { + require Method::Generate::Accessor; + 'Method::Generate::Accessor' + } + }; + $maker_class->new; + } } sub _constructor_maker_for { my ($class, $target, $select_super) = @_; return unless $MAKERS{$target}; $MAKERS{$target}{constructor} ||= do { - { - local $@; - require Method::Generate::Constructor; - require Sub::Defer; - } + require Method::Generate::Constructor; + require Sub::Defer; my ($moo_constructor, $con); if ($select_super && $MAKERS{$select_super}) { @@ -78,20 +108,20 @@ sub _constructor_maker_for { $moo_constructor = 1; # no other constructor, make a Moo one } }; - Method::Generate::Constructor + ($con ? ref($con) : 'Method::Generate::Constructor') ->new( package => $target, - accessor_generator => do { - { local $@; require Method::Generate::Accessor; } - Method::Generate::Accessor->new; - }, + accessor_generator => $class->_accessor_maker_for($target), construction_string => ( $moo_constructor ? ($con ? $con->construction_string : undef) : ('$class->'.$target.'::SUPER::new(@_)') ), - subconstructor_generator => ( - $class.'->_constructor_maker_for($class,'.perlstring($target).')' + subconstructor_handler => ( + ' if ($Moo::MAKERS{$class}) {'."\n" + .' '.$class.'->_constructor_maker_for($class,'.perlstring($target).');'."\n" + .' return $class->new(@_)'.";\n" + .' }'."\n" ), ) ->install_delayed @@ -182,6 +212,30 @@ Hence - Moo exists as its name - Minimal Object Orientation - with a pledge to make it smooth to upgrade to L when you need more than minimal features. +=head1 Moo and Moose - NEW, EXPERIMENTAL + +If L detects L being loaded, it will automatically register +metaclasses for your L and L packages, so you should be able +to use them in L code without it ever realising you aren't using +L everywhere. + +Extending a L class or consuming a L should also work. + +This means that there is no need for anything like L for Moo +code - Moo and Moose code should simply interoperate without problem. + +However, these features are new as of 0.91.0 (0.091000) so while serviceable, +they are absolutely certain to not be 100% yet; please do report bugs. + +If you need to disable the metaclass creation, add: + + no Moo::sification; + +to your code before Moose is loaded, but bear in mind that this switch is +currently global and turns the mechanism off entirely, so don't put this +in library code, only in a top level script as a temporary measure while +you send a bug report. + =head1 IMPORTED METHODS =head2 new @@ -194,13 +248,12 @@ or =head2 BUILDARGS - around BUILDARGS => sub { - my $orig = shift; + sub BUILDARGS { my ( $class, @args ) = @_; unshift @args, "attr1" if @args % 2 == 1; - return $class->$orig(@args); + return { @args }; }; Foo::Bar->new( 3 ); @@ -214,14 +267,14 @@ passed to the constructor. This method should always return a hash reference of named options. -=head2 BUILDALL +=head2 BUILD -Don't override (or probably even call) this method. Instead, you can define -a C method on your class and the constructor will automatically call the -C method from parent down to child after the object has been -instantiated. Typically this is used for object validation or possibly logging. +Define a C method on your class and the constructor will automatically +call the C method from parent down to child after the object has +been instantiated. Typically this is used for object validation or possibly +logging. -=head2 DESTROY +=head2 DEMOLISH If you have a C method anywhere in your inheritance hierarchy, a C method is created on first object construction which will call @@ -303,10 +356,30 @@ Coerce does not require C to be defined. L +=item * handles + +Takes a string + + handles => 'RobotRole' + +Where C is a role (L) that defines an interface which +becomes the list of methods to handle. + +Takes a list of methods + + handles => [ qw( one two ) ] + +Takes a hashref + + handles => { + un => 'one', + } + =item * trigger -Takes a coderef which will get called any time the attribute is set. Coderef -will be invoked against the object with the new value as an argument. +Takes a coderef which will get called any time the attribute is set. This +includes the constructor. Coderef will be invoked against the object with the +new value as an argument. Note that Moose also passes the old value, if any; this feature is not yet supported. @@ -414,14 +487,32 @@ aware can take advantage of this. =head1 INCOMPATIBILITIES WITH MOOSE You can only compose one role at a time. If your application is large or -complex enough to warrant complex composition, you wanted L. +complex enough to warrant complex composition, you wanted L. Note that +this does not mean you can only compose one role per class - + + with 'FirstRole'; + with 'SecondRole'; + +is absolutely fine, there's just currently no equivalent of Moose's -There is no complex type system. C is verified with a coderef, if you + with 'FirstRole', 'SecondRole'; + +which composes the two roles together, and then applies them. + +There is no built in type system. C is verified with a coderef, if you need complex types, just make a library of coderefs, or better yet, functions -that return quoted subs. +that return quoted subs. L provides a similar API +to L so that you can write + + has days_to_live => (is => 'ro', isa => Int); + +and have it work with both; it is hoped that providing only subrefs as an +API will encourage the use of other type systems as well, since it's +probably the weakest part of Moose design-wise. C is not supported in core since the author considers it to be a -bad idea but may be supported by an extension in future. +bad idea but may be supported by an extension in future. Meanwhile C or +C are more likely to be able to fulfill your needs. There is no meta object. If you need this level of complexity you wanted L - Moo succeeds at being small because it explicitly does not @@ -431,6 +522,10 @@ No support for C, C, C, or C - override can be handled by around albeit with a little more typing, and the author considers augment to be a bad idea. +The C method is not provided by default. The author suggests loading +L into C (via C for example) and +using C<$obj-E$::Dwarn()> instead. + L only supports coderefs, because doing otherwise is usually a mistake anyway. @@ -441,6 +536,48 @@ C is not supported since the author considers it a bad idea. C is not supported since it's a very poor replacement for POD. +Handling of warnings: when you C we enable FATAL warnings. The nearest +similar invocation for L would be: + + use Moose; + use warnings FATAL => "all"; + +Additionally, L supports a set of attribute option shortcuts intended to +reduce common boilerplate. The set of shortcuts is the same as in the L +module L as of its version 0.009+. So if you: + + package MyClass; + use Moo; + +The nearest L invocation would be: + + package MyClass; + + use Moose; + use warnings FATAL => "all"; + use MooseX::AttributeShortcuts; + +or, if you're inheriting from a non-Moose class, + + package MyClass; + + use Moose; + use MooseX::NonMoose; + use warnings FATAL => "all"; + use MooseX::AttributeShortcuts; + +Finally, Moose requires you to call + + __PACKAGE__->meta->make_immutable; + +at the end of your class to get an inlined (i.e. not horribly slow) +constructor. Moo does it automatically the first time ->new is called +on your class. + +=head1 SUPPORT + +IRC: #web-simple on irc.perl.org + =head1 AUTHOR mst - Matt S. Trout (cpan:MSTROUT) @@ -463,6 +600,8 @@ ajgb - Alex J. G. Burzyński (cpan:AJGB) doy - Jesse Luehrs (cpan:DOY) +perigrin - Chris Prather (cpan:PERIGRIN) + =head1 COPYRIGHT Copyright (c) 2010-2011 the Moo L and L