From: Mark A. Stratman <stratman@gmail.com>
Date: Fri, 11 Mar 2011 19:31:17 +0000 (-0600)
Subject: Add FAQ on requires and attribute-generated methods
X-Git-Tag: 2.0009~9
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=061b0127cbc06b9845ed3a0a6a048c528d3b76ed;p=gitmo%2FMoose.git

Add FAQ on requires and attribute-generated methods
---

diff --git a/lib/Moose/Manual/FAQ.pod b/lib/Moose/Manual/FAQ.pod
index ec73df8..9ca7ff3 100644
--- a/lib/Moose/Manual/FAQ.pod
+++ b/lib/Moose/Manual/FAQ.pod
@@ -363,6 +363,26 @@ Outside the context of Moose, traits and roles generally mean exactly
 the same thing. The original paper called them traits, but Perl 6
 will call them roles.
 
+=head3 Can an attribute-generated method (e.g. an accessor) satisfy requires?
+
+Yes, just be sure to consume the role I<after> declaring your
+attribute.  L<Moose::Manual::Roles/Required_Attributes> provides
+an example:
+
+  package Breakable;
+  use Moose::Role;
+  requires 'stress';
+
+  package Car;
+  use Moose;
+  with 'Breakable';
+  has 'stress' => ( is  => 'rw', isa => 'Int' );
+
+If you mistakenly consume the C<Breakable> role before declaring your
+C<stress> attribute, you would see an error like this:
+
+  'Breakable' requires the method 'stress' to be implemented by 'Car' at...
+
 =head2 Moose and Subroutine Attributes
 
 =head3 Why don't subroutine attributes I inherited from a superclass work?