From: Chris Prather <chris@prather.org>
Date: Thu, 18 Nov 2010 18:59:32 +0000 (-0500)
Subject: restore documentation for lazy_build and underscore (_) prefixed operators
X-Git-Tag: 1.9900~49
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=970a92fa56f1ea409c8d7c5428392479292fd8d4;p=gitmo%2FMoose.git

restore documentation for lazy_build and underscore (_) prefixed operators

It was removed from Moose::Manual::Attributes reasonably because it's
discouraged. It needs to be documented somewhere, as confound says in the
reference not the guide.

Also updated the link in Recipe 8 to point to the reference.
---

diff --git a/lib/Moose/Cookbook/Basics/Recipe8.pod b/lib/Moose/Cookbook/Basics/Recipe8.pod
index 2d585c7..d748da9 100644
--- a/lib/Moose/Cookbook/Basics/Recipe8.pod
+++ b/lib/Moose/Cookbook/Basics/Recipe8.pod
@@ -100,7 +100,7 @@ do the right thing with the C<predicate> and C<clearer>, making them
 both start with an underscore. The C<builder> method I<always> starts
 with an underscore.
 
-You can read more about C<lazy_build> in L<Moose::Manual::Attributes>
+You can read more about C<lazy_build> in L<Moose::Meta::Attribute>
 
 =head1 CONCLUSION
 
diff --git a/lib/Moose/Meta/Attribute.pm b/lib/Moose/Meta/Attribute.pm
index 1e8a6a3..882adc6 100644
--- a/lib/Moose/Meta/Attribute.pm
+++ b/lib/Moose/Meta/Attribute.pm
@@ -1039,6 +1039,29 @@ is equivalent to this:
       predicate => 'has_size',
   );
 
+
+If your attribute name starts with an underscore (C<_>), then the clearer
+and predicate will as well:
+
+  has '_size' => (
+      is         => 'ro',
+      lazy_build => 1,
+  );
+
+becomes:
+
+  has '_size' => (
+      is        => 'ro',
+      lazy      => 1,
+      builder   => '_build__size',
+      clearer   => '_clear_size',
+      predicate => '_has_size',
+  );
+
+Note the doubled underscore in the builder name. Internally, Moose
+simply prepends the attribute name with "_build_" to come up with the
+builder name.
+
 =item * documentation
 
 An arbitrary string that can be retrieved later by calling C<<