From e0b21df6d7872b520dd4694c07608f99813ba9bd Mon Sep 17 00:00:00 2001
From: Jesse Luehrs <doy@tozt.net>
Date: Fri, 7 May 2010 04:55:31 -0500
Subject: initial implementation

---
 lib/MooseX/Attribute/Shorthand.pm | 55 ++++++++++++++++++++++++++++++++++++---
 t/001-basic.t                     | 24 +++++++++++++++++
 2 files changed, 76 insertions(+), 3 deletions(-)
 create mode 100644 t/001-basic.t

diff --git a/lib/MooseX/Attribute/Shorthand.pm b/lib/MooseX/Attribute/Shorthand.pm
index 185f581..e8a10bf 100644
--- a/lib/MooseX/Attribute/Shorthand.pm
+++ b/lib/MooseX/Attribute/Shorthand.pm
@@ -1,5 +1,8 @@
 package MooseX::Attribute::Shorthand;
-use Moose;
+use strict;
+use warnings;
+
+use Scalar::Util qw(reftype);
 
 =head1 NAME
 
@@ -13,8 +16,54 @@ MooseX::Attribute::Shorthand -
 
 =cut
 
-__PACKAGE__->meta->make_immutable;
-no Moose;
+sub import {
+    my $package = shift;
+    my $caller = caller;
+    my %custom_options = @_;
+    my $role = Moose::Meta::Role->create_anon_role(cache => 1);
+    for my $option (keys %custom_options) {
+        my $meta_options = delete $custom_options{$option}{'-meta_attr_options'};
+        $role->add_attribute($option => (
+            is  => 'ro',
+            isa => 'Bool',
+            %{ $meta_options || {} },
+        ));
+    }
+    $role->add_around_method_modifier(_process_options => sub {
+        my $orig = shift;
+        my $class = shift;
+        my ($name, $options) = @_;
+        my %new_options;
+        for my $option (keys %$options) {
+            if (exists($custom_options{$option})) {
+                for my $expanded_option (keys %{ $custom_options{$option} }) {
+                    my $expanded_val = $custom_options{$option}->{$expanded_option};
+                    if (reftype($expanded_val)
+                     && reftype($expanded_val) eq 'CODE') {
+                        $new_options{$expanded_option} = $expanded_val->(
+                            $name, $options->{$option},
+                        );
+                    }
+                    else {
+                        $new_options{$expanded_option} = $expanded_val;
+                    }
+                }
+            }
+            else {
+                $new_options{$option} = $options->{$option};
+            }
+        }
+        # relies on being modified in-place
+        %$options = %new_options;
+        $class->$orig($name, $options);
+    });
+    Moose::Util::MetaRole::apply_metaroles(
+        for => $caller,
+        class_metaroles => {
+            attribute => [$role->name],
+        },
+    );
+}
 
 =head1 BUGS
 
diff --git a/t/001-basic.t b/t/001-basic.t
new file mode 100644
index 0000000..f3445a4
--- /dev/null
+++ b/t/001-basic.t
@@ -0,0 +1,24 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+use Test::More;
+use Test::Exception;
+
+{
+    package Foo;
+    use Moose;
+    use MooseX::Attribute::Shorthand string => {
+        is      => 'ro',
+        isa     => 'Str',
+        default => sub { $_[1] },
+        -meta_attr_options => { isa => 'Str' },
+    };
+
+    has foo => (string => 'FOO');
+}
+
+my $foo = Foo->new;
+is($foo->foo, 'FOO', "expanded properly");
+dies_ok { $foo->foo('sldkfj') } "expanded properly";
+
+done_testing;
-- 
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