From: Hans Dieter Pearcey <hdp@weftsoar.net>
Date: Thu, 25 Jun 2009 18:39:26 +0000 (-0400)
Subject: add curried_arguments, usable from hashref handles
X-Git-Tag: 0.89_02~138^2~1^2
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=2de18801c55ae2cfac72d6697e797f3875286d83;p=gitmo%2FMoose.git

add curried_arguments, usable from hashref handles
---

diff --git a/lib/Moose/Meta/Attribute.pm b/lib/Moose/Meta/Attribute.pm
index 81bdb2c..bf599be 100644
--- a/lib/Moose/Meta/Attribute.pm
+++ b/lib/Moose/Meta/Attribute.pm
@@ -691,11 +691,17 @@ sub _make_delegation_method {
     $method_body = $method_to_call
         if 'CODE' eq ref($method_to_call);
 
+    my $curried_arguments = [];
+
+    ($method_to_call, $curried_arguments) = @$method_to_call
+        if 'ARRAY' eq ref($method_to_call);
+
     return $self->delegation_metaclass->new(
         name               => $handle_name,
         package_name       => $self->associated_class->name,
         attribute          => $self,
         delegate_to_method => $method_to_call,
+        curried_arguments  => $curried_arguments,
     );
 }
 
diff --git a/lib/Moose/Meta/Method/Delegation.pm b/lib/Moose/Meta/Method/Delegation.pm
index 15c6d21..2fadd19 100644
--- a/lib/Moose/Meta/Method/Delegation.pm
+++ b/lib/Moose/Meta/Method/Delegation.pm
@@ -36,6 +36,14 @@ sub new {
         || confess
         'You must supply a delegate_to_method which is a method name or a CODE reference';
 
+    ( !exists $options{curried_arguments} || (
+        $options{curried_arguments} &&
+            ( 'ARRAY' eq ref $options{curried_arguments} )
+        ) ) || confess
+        'You must supply a curried_arguments which is an ARRAY reference';
+
+    $options{curried_arguments} ||= [];
+
     my $self = $class->_new( \%options );
 
     weaken( $self->{'attribute'} );
@@ -52,6 +60,8 @@ sub _new {
     return bless $options, $class;
 }
 
+sub curried_arguments { (shift)->{'curried_arguments'} }
+
 sub associated_attribute { (shift)->{'attribute'} }
 
 sub delegate_to_method { (shift)->{'delegate_to_method'} }
@@ -88,7 +98,8 @@ sub _initialize_body {
             method_name => $method_to_call,
             object      => $instance
             );
-        $proxy->$method_to_call(@_);
+        my @args = (@{ $self->curried_arguments }, @_);
+        $proxy->$method_to_call(@args);
     };
 }
 
@@ -137,12 +148,21 @@ accessor is being generated for. This options is B<required>.
 The method in the associated attribute's value to which we
 delegate. This can be either a method name or a code reference.
 
+=item I<curried_arguments>
+
+An array reference of arguments that will be prepended to the argument list for
+any call to the delegating method.
+
 =back
 
 =item B<< $metamethod->associated_attribute >>
 
 Returns the attribute associated with this method.
 
+=item B<< $metamethod->curried_arguments >>
+
+Return any curried arguments that will be passed to the delegated method.
+
 =item B<< $metamethod->delegate_to_method >>
 
 Returns the method to which this method delegates, as passed to the
diff --git a/t/020_attributes/010_attribute_delegation.t b/t/020_attributes/010_attribute_delegation.t
index 45505a1..7e44c45 100644
--- a/t/020_attributes/010_attribute_delegation.t
+++ b/t/020_attributes/010_attribute_delegation.t
@@ -3,7 +3,7 @@
 use strict;
 use warnings;
 
-use Test::More tests => 88;
+use Test::More tests => 89;
 use Test::Exception;
 
 
@@ -27,7 +27,10 @@ use Test::Exception;
     has 'foo' => (
         is      => 'rw',
         default => sub { Foo->new },
-        handles => { 'foo_bar' => 'bar' }
+        handles => {
+            'foo_bar' => 'bar',
+            'foo_bar_to_20' => [ bar => [ 20 ] ],
+        }
     );
 }
 
@@ -81,6 +84,10 @@ is($bar->foo, $foo, '... assigned bar->foo with the new Foo');
 is($bar->foo->bar, 25, '... bar->foo->bar returned the right result');
 is($bar->foo_bar, 25, '... and bar->foo_bar delegated correctly again');
 
+# curried handles
+$bar->foo_bar_to_20;
+is($bar->foo_bar, 20, '... correctly curried a single argument');
+
 # -------------------------------------------------------------------
 # ARRAY handles
 # -------------------------------------------------------------------