X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FMoose%2FMeta%2FMethod%2FAccessor.pm;h=e7c26a553eea38c04c45f36c69ecfbd8302881e9;hb=7a10df4daf77f0efcf873693e0868b845387430d;hp=1648b49906e015edf518c68bad0b98225a13f254;hpb=6302a7e870c9ed9bce511891a74e5bdd140fcc74;p=gitmo%2FMoose.git

diff --git a/lib/Moose/Meta/Method/Accessor.pm b/lib/Moose/Meta/Method/Accessor.pm
index 1648b49..e7c26a5 100644
--- a/lib/Moose/Meta/Method/Accessor.pm
+++ b/lib/Moose/Meta/Method/Accessor.pm
@@ -4,7 +4,7 @@ package Moose::Meta::Method::Accessor;
 use strict;
 use warnings;
 
-our $VERSION   = '0.73_02';
+our $VERSION   = '0.93_03';
 $VERSION = eval $VERSION;
 our $AUTHORITY = 'cpan:STEVAN';
 
@@ -17,7 +17,7 @@ sub _error_thrower {
 }
 
 sub _eval_code {
-    my ( $self, $code ) = @_;
+    my ( $self, $source ) = @_;
 
     # NOTE:
     # set up the environment
@@ -34,9 +34,15 @@ sub _eval_code {
                                    : undef),
     };
 
-    #warn "code for $attr_name =>\n" . $code . "\n";
-    $self->_compile_code( environment => $environment, code => $code )
-        or $self->throw_error("Could not create writer for '${\$self->associated_attribute->name}' because $@ \n code: $code", error => $@, data => $code );
+    #warn "code for " . $attr->name . " =>\n" . $source . "\n";
+    my ( $code, $e ) = $self->_compile_code( environment => $environment, code => $source );
+
+    $self->throw_error(
+        "Could not create writer for '${\$self->associated_attribute->name}' because $e \n code: $source",
+        error => $e, data => $source )
+        if $e;
+
+    return $code;
 }
 
 sub _generate_accessor_method_inline {
@@ -44,7 +50,6 @@ sub _generate_accessor_method_inline {
     my $attr        = $self->associated_attribute;
     my $attr_name   = $attr->name;
     my $inv         = '$_[0]';
-    my $slot_access = $self->_inline_access($inv, $attr_name);
     my $value_name  = $self->_value_needs_copy ? '$val' : '$_[1]';
 
     $self->_eval_code('sub { ' . "\n"
@@ -54,8 +59,9 @@ sub _generate_accessor_method_inline {
         . $self->_inline_check_required . "\n"
         . $self->_inline_check_coercion($value_name) . "\n"
         . $self->_inline_check_constraint($value_name) . "\n"
+        . $self->_inline_get_old_value_for_trigger($inv, $value_name) . "\n"
         . $self->_inline_store($inv, $value_name) . "\n"
-        . $self->_inline_trigger($inv, $value_name) . "\n"
+        . $self->_inline_trigger($inv, $value_name, '@old') . "\n"
     . ' }' . "\n"
     . $self->_inline_check_lazy($inv) . "\n"
     . $self->_inline_post_body(@_) . "\n"
@@ -77,9 +83,10 @@ sub _generate_writer_method_inline {
     . $self->_inline_check_required
     . $self->_inline_check_coercion($value_name)
     . $self->_inline_check_constraint($value_name)
+    . $self->_inline_get_old_value_for_trigger($inv, $value_name) . "\n"
     . $self->_inline_store($inv, $value_name)
     . $self->_inline_post_body(@_)
-    . $self->_inline_trigger($inv, $value_name)
+    . $self->_inline_trigger($inv, $value_name, '@old')
     . ' }');
 }
 
@@ -120,12 +127,12 @@ sub _inline_post_body { '' }
 
 sub _inline_check_constraint {
     my ($self, $value) = @_;
-    
+
     my $attr = $self->associated_attribute;
     my $attr_name = $attr->name;
-    
+
     return '' unless $attr->has_type_constraint;
-    
+
     my $type_constraint_name = $attr->type_constraint->name;
 
     qq{\$type_constraint->($value) || } . $self->_inline_throw_error(qq{"Attribute ($attr_name) does not pass the type constraint because: " . \$type_constraint_obj->get_message($value)}, "data => $value") . ";";
@@ -135,7 +142,7 @@ sub _inline_check_coercion {
     my ($self, $value) = @_;
 
     my $attr = $self->associated_attribute;
-    
+
     return '' unless $attr->should_coerce;
     return "$value = \$attr->type_constraint->coerce($value);";
 }
@@ -145,7 +152,7 @@ sub _inline_check_required {
     my $attr = $self->associated_attribute;
 
     my $attr_name = $attr->name;
-    
+
     return '' unless $attr->is_required;
     return qq{(\@_ >= 2) || } . $self->_inline_throw_error(qq{"Attribute ($attr_name) is required, so cannot be set to undef"}) . ';' # defined $_[1] is not good enough
 }
@@ -157,8 +164,6 @@ sub _inline_check_lazy {
 
     return '' unless $attr->is_lazy;
 
-    my $slot_access = $self->_inline_access($instance, $attr->name);
-
     my $slot_exists = $self->_inline_has($instance, $attr->name);
 
     my $code = 'unless (' . $slot_exists . ') {' . "\n";
@@ -166,7 +171,7 @@ sub _inline_check_lazy {
         if ($attr->has_default || $attr->has_builder) {
             if ($attr->has_default) {
                 $code .= '    my $default = $attr->default(' . $instance . ');'."\n";
-            } 
+            }
             elsif ($attr->has_builder) {
                 $code .= '    my $default;'."\n".
                          '    if(my $builder = '.$instance.'->can($attr->builder)){ '."\n".
@@ -176,25 +181,25 @@ sub _inline_check_lazy {
             }
             $code .= $self->_inline_check_coercion('$default') . "\n";
             $code .= $self->_inline_check_constraint('$default') . "\n";
-            $code .= '    ' . $self->_inline_init_slot($attr, $instance, $slot_access, '$default') . "\n";
-        } 
+            $code .= '    ' . $self->_inline_init_slot($attr, $instance, '$default') . "\n";
+        }
         else {
-            $code .= '    ' . $self->_inline_init_slot($attr, $instance, $slot_access, 'undef') . "\n";
+            $code .= '    ' . $self->_inline_init_slot($attr, $instance, 'undef') . "\n";
         }
 
     } else {
         if ($attr->has_default) {
-            $code .= '    ' . $self->_inline_init_slot($attr, $instance, $slot_access, ('$attr->default(' . $instance . ')')) . "\n";            
-        } 
+            $code .= '    ' . $self->_inline_init_slot($attr, $instance, ('$attr->default(' . $instance . ')')) . "\n";
+        }
         elsif ($attr->has_builder) {
-            $code .= '    if (my $builder = '.$instance.'->can($attr->builder)) { ' . "\n" 
-                  .  '       ' . $self->_inline_init_slot($attr, $instance, $slot_access, ($instance . '->$builder'))           
+            $code .= '    if (my $builder = '.$instance.'->can($attr->builder)) { ' . "\n"
+                  .  '       ' . $self->_inline_init_slot($attr, $instance, ($instance . '->$builder'))
                   .  "\n    } else {\n"
                   .  '        ' . $self->_inline_throw_error(q{sprintf "%s does not support builder method '%s' for attribute '%s'", ref(} . $instance . ') || '.$instance.', $attr->builder, $attr->name')
                   .  ';'. "\n    }";
-        } 
+        }
         else {
-            $code .= '    ' . $self->_inline_init_slot($attr, $instance, $slot_access, 'undef') . "\n";
+            $code .= '    ' . $self->_inline_init_slot($attr, $instance, 'undef') . "\n";
         }
     }
     $code .= "}\n";
@@ -202,38 +207,53 @@ sub _inline_check_lazy {
 }
 
 sub _inline_init_slot {
-    my ($self, $attr, $inv, $slot_access, $value) = @_;
+    my ($self, $attr, $inv, $value) = @_;
     if ($attr->has_initializer) {
         return ('$attr->set_initial_value(' . $inv . ', ' . $value . ');');
     }
     else {
-        return ($slot_access . ' = ' . $value . ';');
-    }    
+        return $self->_inline_store($inv, $value);
+    }
 }
 
 sub _inline_store {
     my ($self, $instance, $value) = @_;
     my $attr = $self->associated_attribute;
-    
+
     my $mi = $attr->associated_class->get_meta_instance;
-    
+
     my $code = $mi->inline_set_slot_value($instance, $attr->slots, $value)    . ";";
     $code   .= $mi->inline_weaken_slot_value($instance, $attr->slots, $value) . ";"
         if $attr->is_weak_ref;
     return $code;
 }
 
+sub _inline_get_old_value_for_trigger {
+    my ( $self, $instance ) = @_;
+
+    my $attr = $self->associated_attribute;
+    return '' unless $attr->has_trigger;
+
+    my $mi = $attr->associated_class->get_meta_instance;
+    my $pred = $mi->inline_is_slot_initialized($instance, $attr->name);
+
+    return
+          'my @old = '
+        . $pred . q{ ? }
+        . $self->_inline_get($instance) . q{ : ()} . ";\n";
+}
+
 sub _inline_trigger {
-    my ($self, $instance, $value) = @_;
+    my ($self, $instance, $value, $old_value) = @_;
     my $attr = $self->associated_attribute;
     return '' unless $attr->has_trigger;
-    return sprintf('$attr->trigger->(%s, %s);', $instance, $value);
+    return sprintf('$attr->trigger->(%s, %s, %s);', $instance, $value, $old_value);
 }
 
 sub _inline_get {
     my ($self, $instance) = @_;
     my $attr = $self->associated_attribute;
-    
+
     my $mi = $attr->associated_class->get_meta_instance;
 
     return $mi->inline_get_slot_value($instance, $attr->slots);
@@ -242,7 +262,7 @@ sub _inline_get {
 sub _inline_access {
     my ($self, $instance) = @_;
     my $attr = $self->associated_attribute;
-    
+
     my $mi = $attr->associated_class->get_meta_instance;
 
     return $mi->inline_slot_access($instance, $attr->slots);
@@ -251,7 +271,7 @@ sub _inline_access {
 sub _inline_has {
     my ($self, $instance) = @_;
     my $attr = $self->associated_attribute;
-    
+
     my $mi = $attr->associated_class->get_meta_instance;
 
     return $mi->inline_is_slot_initialized($instance, $attr->slots);
@@ -291,18 +311,16 @@ Moose::Meta::Method::Accessor - A Moose Method metaclass for accessors
 
 =head1 DESCRIPTION
 
-This class is a subclass of L<Class::MOP::Class::Accessor> that
+This class is a subclass of L<Class::MOP::Method::Accessor> that
 provides additional Moose-specific functionality, all of which is
 private.
 
 To understand this class, you should read the the
-L<Class::MOP::Class::Accessor> documentation.
+L<Class::MOP::Method::Accessor> documentation.
 
 =head1 BUGS
 
-All complex software has bugs lurking in it, and this module is no
-exception. If you find a bug please either email me, or add the bug
-to cpan-RT.
+See L<Moose/BUGS> for details on reporting bugs.
 
 =head1 AUTHOR
 
@@ -312,7 +330,7 @@ Yuval Kogman E<lt>nothingmuch@woobling.comE<gt>
 
 =head1 COPYRIGHT AND LICENSE
 
-Copyright 2006-2009 by Infinity Interactive, Inc.
+Copyright 2006-2010 by Infinity Interactive, Inc.
 
 L<http://www.iinteractive.com>