X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FMoo.pm;h=f188c1259ed7bfdb7ba1352435d8b889ba0e6e52;hb=b682218c3bf8133f99d55af4b58e7698e58a4fcd;hp=2f27387819a066125be2d854879380bc9c8491dc;hpb=dccea57d17d218806e5770d0044c85e30c38e8da;p=gitmo%2FRole-Tiny.git

diff --git a/lib/Moo.pm b/lib/Moo.pm
index 2f27387..f188c12 100644
--- a/lib/Moo.pm
+++ b/lib/Moo.pm
@@ -2,8 +2,9 @@ package Moo;
 
 use strictures 1;
 use Moo::_Utils;
+use B 'perlstring';
 
-our $VERSION = '0.009001'; # 0.9.1
+our $VERSION = '0.009013'; # 0.9.13
 $VERSION = eval $VERSION;
 
 our %MAKERS;
@@ -12,20 +13,22 @@ sub import {
   my $target = caller;
   my $class = shift;
   strictures->import;
+  return if $MAKERS{$target}; # already exported into this package
   *{_getglob("${target}::extends")} = sub {
     _load_module($_) for @_;
-    *{_getglob("${target}::ISA")} = \@_;
+    # Can't do *{...} = \@_ or 5.10.0's mro.pm stops seeing @ISA
+    @{*{_getglob("${target}::ISA")}{ARRAY}} = @_;
   };
   *{_getglob("${target}::with")} = sub {
-    require Moo::Role;
+    { local $@; require Moo::Role; }
     die "Only one role supported at a time by with" if @_ > 1;
-    Moo::Role->apply_role_to_package($_[0], $target);
+    Moo::Role->apply_role_to_package($target, $_[0]);
   };
   $MAKERS{$target} = {};
   *{_getglob("${target}::has")} = sub {
     my ($name, %spec) = @_;
     ($MAKERS{$target}{accessor} ||= do {
-      require Method::Generate::Accessor;
+      { local $@; require Method::Generate::Accessor; }
       Method::Generate::Accessor->new
     })->generate_method($target, $name, \%spec);
     $class->_constructor_maker_for($target)
@@ -33,45 +36,481 @@ sub import {
   };
   foreach my $type (qw(before after around)) {
     *{_getglob "${target}::${type}"} = sub {
-      require Class::Method::Modifiers;
+      { local $@; require Class::Method::Modifiers; }
       _install_modifier($target, $type, @_);
     };
   }
   {
     no strict 'refs';
     @{"${target}::ISA"} = do {
-      require Moo::Object; ('Moo::Object');
+      { local $@; require Moo::Object; } ('Moo::Object');
     } unless @{"${target}::ISA"};
   }
 }
 
 sub _constructor_maker_for {
-  my ($class, $target) = @_;
+  my ($class, $target, $select_super) = @_;
   return unless $MAKERS{$target};
   $MAKERS{$target}{constructor} ||= do {
-    require Method::Generate::Constructor;
+    {
+      local $@;
+      require Method::Generate::Constructor;
+      require Sub::Defer;
+    }
+    my ($moo_constructor, $con);
+
+    if ($select_super && $MAKERS{$select_super}) {
+      $moo_constructor = 1;
+      $con = $MAKERS{$select_super}{constructor};
+    } else {
+      my $t_new = $target->can('new');
+      if ($t_new) {
+        if ($t_new == Moo::Object->can('new')) {
+          $moo_constructor = 1;
+        } elsif (my $defer_target = (Sub::Defer::defer_info($t_new)||[])->[0]) {
+          my ($pkg) = ($defer_target =~ /^(.*)::[^:]+$/);
+          if ($MAKERS{$pkg}) {
+            $moo_constructor = 1;
+            $con = $MAKERS{$pkg}{constructor};
+          }
+        }
+      } else {
+        $moo_constructor = 1; # no other constructor, make a Moo one
+      }
+    };
     Method::Generate::Constructor
       ->new(
         package => $target,
         accessor_generator => do {
-          require Method::Generate::Accessor;
+          { local $@; require Method::Generate::Accessor; }
           Method::Generate::Accessor->new;
-        }
+        },
+        construction_string => (
+          $moo_constructor
+            ? ($con ? $con->construction_string : undef)
+            : ('$class->'.$target.'::SUPER::new(@_)')
+        ),
+        subconstructor_generator => (
+          $class.'->_constructor_maker_for($class,'.perlstring($target).')'
+        ),
       )
       ->install_delayed
-      ->register_attribute_specs(do {
-        my @spec;
-        # using the -last- entry in @ISA means that classes created by
-        # Role::Tiny as N roles + superclass will still get the attributes
-        # from the superclass
-        if (my $super = do { no strict 'refs'; ${"${target}::ISA"}[-1] }) {
-          if (my $con = $MAKERS{$super}{constructor}) {
-            @spec = %{$con->all_attribute_specs};
-          }
-        }
-        @spec;
-      });
+      ->register_attribute_specs(%{$con?$con->all_attribute_specs:{}})
   }
 }
 
 1;
+=pod
+
+=encoding utf-8
+
+=head1 NAME
+
+Moo - Minimalist Object Orientation (with Moose compatiblity)
+
+=head1 SYNOPSIS
+
+ package Cat::Food;
+
+ use Moo;
+ use Sub::Quote;
+
+ sub feed_lion {
+   my $self = shift;
+   my $amount = shift || 1;
+
+   $self->pounds( $self->pounds - $amount );
+ }
+
+ has taste => (
+   is => 'ro',
+ );
+
+ has brand => (
+   is  => 'ro',
+   isa => sub {
+     die "Only SWEET-TREATZ supported!" unless $_[0] eq 'SWEET-TREATZ'
+   },
+);
+
+ has pounds => (
+   is  => 'rw',
+   isa => quote_sub q{ die "$_[0] is too much cat food!" unless $_[0] < 15 },
+ );
+
+ 1;
+
+and else where
+
+ my $full = Cat::Food->new(
+    taste  => 'DELICIOUS.',
+    brand  => 'SWEET-TREATZ',
+    pounds => 10,
+ );
+
+ $full->feed_lion;
+
+ say $full->pounds;
+
+=head1 DESCRIPTION
+
+This module is an extremely light-weight, high-performance L<Moose> replacement.
+It also avoids depending on any XS modules to allow simple deployments.  The
+name C<Moo> is based on the idea that it provides almost -but not quite- two
+thirds of L<Moose>.
+
+Unlike C<Mouse> this module does not aim at full L<Moose> compatibility.  See
+L</INCOMPATIBILITIES> for more details.
+
+=head1 WHY MOO EXISTS
+
+If you want a full object system with a rich Metaprotocol, L<Moose> is
+already wonderful.
+
+I've tried several times to use L<Mouse> but it's 3x the size of Moo and
+takes longer to load than most of my Moo based CGI scripts take to run.
+
+If you don't want L<Moose>, you don't want "less metaprotocol" like L<Mouse>,
+you want "as little as possible" - which means "no metaprotocol", which is
+what Moo provides.
+
+By Moo 1.0 I intend to have Moo's equivalent of L<Any::Moose> built in -
+if Moose gets loaded, any Moo class or role will act as a Moose equivalent
+if treated as such.
+
+Hence - Moo exists as its name - Minimal Object Orientation - with a pledge
+to make it smooth to upgrade to L<Moose> when you need more than minimal
+features.
+
+=head1 IMPORTED METHODS
+
+=head2 new
+
+ Foo::Bar->new( attr1 => 3 );
+
+or
+
+ Foo::Bar->new({ attr1 => 3 });
+
+=head2 BUILDARGS
+
+ around BUILDARGS => sub {
+   my $orig = shift;
+   my ( $class, @args ) = @_;
+
+   unshift @args, "attr1" if @args % 2 == 1;
+
+   return $class->$orig(@args);
+ };
+
+ Foo::Bar->new( 3 );
+
+The default implementation of this method accepts a hash or hash reference of
+named parameters. If it receives a single argument that isn't a hash reference
+it throws an error.
+
+You can override this method in your class to handle other types of options
+passed to the constructor.
+
+This method should always return a hash reference of named options.
+
+=head2 BUILD
+
+Define a C<BUILD> method on your class and the constructor will automatically
+call the C<BUILD> method from parent down to child after the object has
+been instantiated.  Typically this is used for object validation or possibly
+logging.
+
+=head2 DEMOLISH
+
+If you have a C<DEMOLISH> method anywhere in your inheritance hierarchy,
+a C<DESTROY> method is created on first object construction which will call
+C<< $instance->DEMOLISH($in_global_destruction) >> for each C<DEMOLISH>
+method from child upwards to parents.
+
+Note that the C<DESTROY> method is created on first construction of an object
+of your class in order to not add overhead to classes without C<DEMOLISH>
+methods; this may prove slightly surprising if you try and define your own.
+
+=head2 does
+
+ if ($foo->does('Some::Role1')) {
+   ...
+ }
+
+Returns true if the object composes in the passed role.
+
+=head1 IMPORTED SUBROUTINES
+
+=head2 extends
+
+ extends 'Parent::Class';
+
+Declares base class. Multiple superclasses can be passed for multiple
+inheritance (but please use roles instead).
+
+Calling extends more than once will REPLACE your superclasses, not add to
+them like 'use base' would.
+
+=head2 with
+
+ with 'Some::Role1';
+ with 'Some::Role2';
+
+Composes a L<Role::Tiny> into current class.  Only one role may be composed in
+at a time to allow the code to remain as simple as possible.
+
+=head2 has
+
+ has attr => (
+   is => 'ro',
+ );
+
+Declares an attribute for the class.
+
+The options for C<has> are as follows:
+
+=over 2
+
+=item * is
+
+B<required>, must be C<ro> or C<rw>.  Unsurprisingly, C<ro> generates an
+accessor that will not respond to arguments; to be clear: a getter only. C<rw>
+will create a perlish getter/setter.
+
+=item * isa
+
+Takes a coderef which is meant to validate the attribute.  Unlike L<Moose> Moo
+does not include a basic type system, so instead of doing C<< isa => 'Num' >>,
+one should do
+
+ isa => quote_sub q{
+   die "$_[0] is not a number!" unless looks_like_number $_[0]
+ },
+
+L<Sub::Quote aware|/SUB QUOTE AWARE>
+
+=item * coerce
+
+Takes a coderef which is meant to coerce the attribute.  The basic idea is to
+do something like the following:
+
+ coerce => quote_sub q{
+   $_[0] + 1 unless $_[0] % 2
+ },
+
+Coerce does not require C<isa> to be defined.
+
+L<Sub::Quote aware|/SUB QUOTE AWARE>
+
+=item * handles
+
+Takes a string
+
+  handles => 'RobotRole'
+
+Where C<RobotRole> is a role (L<Moo::Role>) 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.
+
+Note that Moose also passes the old value, if any; this feature is not yet
+supported.
+
+L<Sub::Quote aware|/SUB QUOTE AWARE>
+
+=item * default
+
+Takes a coderef which will get called with $self as its only argument
+to populate an attribute if no value is supplied to the constructor - or
+if the attribute is lazy, when the attribute is first retrieved if no
+value has yet been provided.
+
+Note that if your default is fired during new() there is no guarantee that
+other attributes have been populated yet so you should not rely on their
+existence.
+
+L<Sub::Quote aware|/SUB QUOTE AWARE>
+
+=item * predicate
+
+Takes a method name which will return true if an attribute has a value.
+
+A common example of this would be to call it C<has_$foo>, implying that the
+object has a C<$foo> set.
+
+=item * builder
+
+Takes a method name which will be called to create the attribute - functions
+exactly like default except that instead of calling
+
+  $default->($self);
+
+Moo will call
+
+  $self->$builder;
+
+=item * clearer
+
+Takes a method name which will clear the attribute.
+
+=item * lazy
+
+B<Boolean>.  Set this if you want values for the attribute to be grabbed
+lazily.  This is usually a good idea if you have a L</builder> which requires
+another attribute to be set.
+
+=item * required
+
+B<Boolean>.  Set this if the attribute must be passed on instantiation.
+
+=item * reader
+
+The value of this attribute will be the name of the method to get the value of
+the attribute.  If you like Java style methods, you might set this to
+C<get_foo>
+
+=item * writer
+
+The value of this attribute will be the name of the method to set the value of
+the attribute.  If you like Java style methods, you might set this to
+C<set_foo>
+
+=item * weak_ref
+
+B<Boolean>.  Set this if you want the reference that the attribute contains to
+be weakened; use this when circular references are possible, which will cause
+leaks.
+
+=item * init_arg
+
+Takes the name of the key to look for at instantiation time of the object.  A
+common use of this is to make an underscored attribute have a non-underscored
+initialization name. C<undef> means that passing the value in on instantiation
+
+=back
+
+=head2 before
+
+ before foo => sub { ... };
+
+See L<< Class::Method::Modifiers/before method(s) => sub { ... } >> for full
+documentation.
+
+=head2 around
+
+ around foo => sub { ... };
+
+See L<< Class::Method::Modifiers/around method(s) => sub { ... } >> for full
+documentation.
+
+=head2 after
+
+ after foo => sub { ... };
+
+See L<< Class::Method::Modifiers/after method(s) => sub { ... } >> for full
+documentation.
+
+=head1 SUB QUOTE AWARE
+
+L<Sub::Quote/quote_sub> allows us to create coderefs that are "inlineable,"
+giving us a handy, XS-free speed boost.  Any option that is L<Sub::Quote>
+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<Moose>.
+
+There is no complex type system.  C<isa> is verified with a coderef, if you
+need complex types, just make a library of coderefs, or better yet, functions
+that return quoted subs.
+
+C<initializer> is not supported in core since the author considers it to be a
+bad idea but may be supported by an extension in future.
+
+There is no meta object.  If you need this level of complexity you wanted
+L<Moose> - Moo succeeds at being small because it explicitly does not
+provide a metaprotocol.
+
+No support for C<super>, C<override>, C<inner>, or C<augment> - override can
+be handled by around albeit with a little more typing, and the author considers
+augment to be a bad idea.
+
+L</default> only supports coderefs, because doing otherwise is usually a
+mistake anyway.
+
+C<lazy_build> is not supported per se, but of course it will work if you
+manually set all the options it implies.
+
+C<auto_deref> is not supported since the author considers it a bad idea.
+
+C<documentation> is not supported since it's a very poor replacement for POD.
+
+Handling of warnings: when you C<use Moo> we enable FATAL warnings.  The nearest
+similar invocation for L<Moose> would be:
+
+  use Moose;
+  use warnings FATAL => "all";
+
+Additionally, L<Moo> supports a set of attribute option shortcuts intended to
+reduce common boilerplate.  The set of shortcuts is the same as in the L<Moose>
+module L<MooseX::AttributeShortcuts>.  So if you:
+
+    package MyClass;
+    use Moo;
+
+The nearest L<Moose> invocation would be:
+
+    package MyClass;
+
+    use Moose;
+    use warnings FATAL => "all";
+    use MooseX::AttributeShortcuts;
+
+=head1 AUTHOR
+
+mst - Matt S. Trout (cpan:MSTROUT) <mst@shadowcat.co.uk>
+
+=head1 CONTRIBUTORS
+
+dg - David Leadbeater (cpan:DGL) <dgl@dgl.cx>
+
+frew - Arthur Axel "fREW" Schmidt (cpan:FREW) <frioux@gmail.com>
+
+hobbs - Andrew Rodland (cpan:ARODLAND) <arodland@cpan.org>
+
+jnap - John Napiorkowski (cpan:JJNAPIORK) <jjn1056@yahoo.com>
+
+ribasushi - Peter Rabbitson (cpan:RIBASUSHI) <ribasushi@cpan.org>
+
+chip - Chip Salzenberg (cpan:CHIPS) <chip@pobox.com>
+
+ajgb - Alex J. G. Burzyński (cpan:AJGB) <ajgb@cpan.org>
+
+doy - Jesse Luehrs (cpan:DOY) <doy at tozt dot net>
+
+=head1 COPYRIGHT
+
+Copyright (c) 2010-2011 the Moo L</AUTHOR> and L</CONTRIBUTORS>
+as listed above.
+
+=head1 LICENSE
+
+This library is free software and may be distributed under the same terms
+as perl itself.
+
+=cut