Doc for some of the new meta methods

[gitmo/Mouse.git] / lib / Mouse / Meta / Attribute.pm

diff --git a/lib/Mouse/Meta/Attribute.pm b/lib/Mouse/Meta/Attribute.pm
index ff1a3ff..af9e737 100644 (file)
--- a/lib/Mouse/Meta/Attribute.pm
+++ b/lib/Mouse/Meta/Attribute.pm
@@ -10,10 +10,30 @@ sub new {
     my $class = shift;
     my %args  = @_;
 
-    $args{init_arg} = $args{name}
+    my $name = $args{name};
+
+    $args{init_arg} = $name
         unless exists $args{init_arg};
+
     $args{is} ||= '';
 
+    if ($args{lazy_build}) {
+        confess("You can not use lazy_build and default for the same attribute $name")
+            if exists $args{default};
+        $args{lazy}      = 1;
+        $args{required}  = 1;
+        $args{builder}   = "_build_${name}"
+            if !exists($args{builder});
+        if ($name =~ /^_/) {
+            $args{clearer}   = "_clear${name}" if !exists($args{clearer});
+            $args{predicate} = "_has${name}" if !exists($args{predicate});
+        }
+        else {
+            $args{clearer}   = "clear_${name}" if !exists($args{clearer});
+            $args{predicate} = "has_${name}" if !exists($args{predicate});
+        }
+    }
+
     bless \%args, $class;
 }
 
@@ -23,6 +43,7 @@ sub _is_metadata      { $_[0]->{is}              }
 sub is_required       { $_[0]->{required}        }
 sub default           { $_[0]->{default}         }
 sub is_lazy           { $_[0]->{lazy}            }
+sub is_lazy_build     { $_[0]->{lazy_build}      }
 sub predicate         { $_[0]->{predicate}       }
 sub clearer           { $_[0]->{clearer}         }
 sub handles           { $_[0]->{handles}         }
@@ -283,7 +304,7 @@ sub get_parent_args {
     my $name  = shift;
 
     for my $super ($class->meta->linearized_isa) {
-        my $super_attr = $super->meta->get_attribute($name)
+        my $super_attr = $super->can("meta") && $super->meta->get_attribute($name)
             or next;
         return %{ $super_attr->_create_args };
     }
@@ -350,6 +371,8 @@ installed. Some error checking is done.
 
 =head2 has_builder -> Bool
 
+=head2 is_lazy_build => Bool
+
 =head2 should_auto_deref -> Bool
 
 Informational methods.
@@ -380,5 +403,15 @@ this attribute's type constraint;
 Checks that the given value passes this attribute's type constraint. Returns 1
 on success, otherwise C<confess>es.
 
+=head2 clone_parent OwnerClass, AttributeName, %args -> Mouse::Meta::Attribute
+
+Creates a new attribute in OwnerClass, inheriting options from parent classes.
+Accessors and helper methods are installed. Some error checking is done.
+
+=head2 get_parent_args OwnerClass, AttributeName -> Hash
+
+Returns the options that the parent class of C<OwnerClass> used for attribute
+C<AttributeName>.
+
 =cut