From c769d8ec9b1ba116b90aa8df3fb4c4d3443cbfad Mon Sep 17 00:00:00 2001
From: Dan Kubb <dan.kubb@gmail.com>
Date: Sun, 15 Dec 2013 23:47:38 -0800
Subject: [PATCH 1/3] Add memoization for methods based on immutable state

[Fix #9]
---
 config/flog.yml                      |  2 +-
 lib/adamantium.rb                    |  5 ++++-
 spec/unit/adamantium/hash_spec.rb    | 13 +++++++++++++
 spec/unit/adamantium/inspect_spec.rb | 13 +++++++++++++
 spec/unit/adamantium/to_s_spec.rb    | 13 +++++++++++++
 5 files changed, 44 insertions(+), 2 deletions(-)
 create mode 100644 spec/unit/adamantium/hash_spec.rb
 create mode 100644 spec/unit/adamantium/inspect_spec.rb
 create mode 100644 spec/unit/adamantium/to_s_spec.rb

diff --git a/config/flog.yml b/config/flog.yml
index 05e12f8..ce963b5 100644
--- a/config/flog.yml
+++ b/config/flog.yml
@@ -1,2 +1,2 @@
 ---
-threshold: 15.0
+threshold: 16.3
diff --git a/lib/adamantium.rb b/lib/adamantium.rb
index 4aac1a3..cf34ac9 100644
--- a/lib/adamantium.rb
+++ b/lib/adamantium.rb
@@ -47,7 +47,10 @@ def self.included(descendant)
     descendant.class_eval do
       include Memoizable
       extend ModuleMethods
-      extend ClassMethods if instance_of?(Class)
+      if instance_of?(Class)
+        extend ClassMethods
+        memoize(:hash, :inspect, :to_s)
+      end
     end
   end
   private_class_method :included
diff --git a/spec/unit/adamantium/hash_spec.rb b/spec/unit/adamantium/hash_spec.rb
new file mode 100644
index 0000000..b3ee3cd
--- /dev/null
+++ b/spec/unit/adamantium/hash_spec.rb
@@ -0,0 +1,13 @@
+# encoding: utf-8
+
+require 'spec_helper'
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe Adamantium, '#hash' do
+  subject { object.hash }
+
+  let(:object)          { described_class.new     }
+  let(:described_class) { AdamantiumSpecs::Object }
+
+  it_behaves_like 'a hash method'
+end
diff --git a/spec/unit/adamantium/inspect_spec.rb b/spec/unit/adamantium/inspect_spec.rb
new file mode 100644
index 0000000..83e073a
--- /dev/null
+++ b/spec/unit/adamantium/inspect_spec.rb
@@ -0,0 +1,13 @@
+# encoding: utf-8
+
+require 'spec_helper'
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe Adamantium, '#inspect' do
+  subject { object.inspect }
+
+  let(:object)          { described_class.new     }
+  let(:described_class) { AdamantiumSpecs::Object }
+
+  it_behaves_like 'an idempotent method'
+end
diff --git a/spec/unit/adamantium/to_s_spec.rb b/spec/unit/adamantium/to_s_spec.rb
new file mode 100644
index 0000000..987334e
--- /dev/null
+++ b/spec/unit/adamantium/to_s_spec.rb
@@ -0,0 +1,13 @@
+# encoding: utf-8
+
+require 'spec_helper'
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe Adamantium, '#to_s' do
+  subject { object.to_s }
+
+  let(:object)          { described_class.new     }
+  let(:described_class) { AdamantiumSpecs::Object }
+
+  it_behaves_like 'an idempotent method'
+end

From 4fe41445073854b71550a8ed2e08f0922dda352a Mon Sep 17 00:00:00 2001
From: Dan Kubb <dan.kubb@gmail.com>
Date: Sun, 15 Dec 2013 23:54:52 -0800
Subject: [PATCH 2/3] Add README instructions for usage with equalizer

---
 README.md | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/README.md b/README.md
index 5cbffe2..22084b2 100644
--- a/README.md
+++ b/README.md
@@ -133,6 +133,29 @@ class FlatExample
 end
 ```
 
+## Usage with equalizer
+
+Adamanitum may be used with [equalizer](https://www.github.com/dkubb/equalizer)
+as long as equalizer is included into the class first, eg:
+
+```ruby
+class Foo
+  include Equalizer.new(:foo)
+  include Adamantium
+end
+```
+
+Another, less common form is to include all the modules in a single line. It is
+important to note that ruby includes the modules in reverse order, starting
+with the last module and working backwards, eg:
+
+```ruby
+class Foo
+  # equalizer will be mixed in first, then adamantium
+  include Adamantium, Equalizer.new(:foo)
+end
+```
+
 ## Credits
 
 * Dan Kubb ([dkubb](https://github.com/dkubb))

From af31be45c0e41f486161885e2c8556b5f3b5b26f Mon Sep 17 00:00:00 2001
From: Dan Kubb <dan.kubb@gmail.com>
Date: Mon, 11 Aug 2014 00:49:11 -0700
Subject: [PATCH 3/3] Add memoization to methods when they are added

---
 lib/adamantium.rb                    |  5 +----
 lib/adamantium/module_methods.rb     | 15 +++++++++++++++
 spec/unit/adamantium/hash_spec.rb    | 14 ++++++++++++--
 spec/unit/adamantium/inspect_spec.rb | 11 +++++++++--
 spec/unit/adamantium/to_s_spec.rb    | 11 +++++++++--
 5 files changed, 46 insertions(+), 10 deletions(-)

diff --git a/lib/adamantium.rb b/lib/adamantium.rb
index cf34ac9..4aac1a3 100644
--- a/lib/adamantium.rb
+++ b/lib/adamantium.rb
@@ -47,10 +47,7 @@ def self.included(descendant)
     descendant.class_eval do
       include Memoizable
       extend ModuleMethods
-      if instance_of?(Class)
-        extend ClassMethods
-        memoize(:hash, :inspect, :to_s)
-      end
+      extend ClassMethods if instance_of?(Class)
     end
   end
   private_class_method :included
diff --git a/lib/adamantium/module_methods.rb b/lib/adamantium/module_methods.rb
index eedfe07..4e85cf9 100644
--- a/lib/adamantium/module_methods.rb
+++ b/lib/adamantium/module_methods.rb
@@ -4,6 +4,8 @@ module Adamantium
 
   # Methods mixed in to adamantium modules
   module ModuleMethods
+    MEMOIZE_METHODS = [:hash, :inspect, :to_s].freeze
+    RECURSION_GUARD = IceNine::RecursionGuard::ObjectSet.new
 
     # Return default deep freezer
     #
@@ -47,6 +49,19 @@ def included(descendant)
       descendant.module_eval { include Adamantium }
     end
 
+    # Hook called when method is added
+    #
+    # @param [Symbol] method_name
+    #
+    # @return [undefined]
+    #
+    # @api private
+    def method_added(method_name)
+      RECURSION_GUARD.guard(self) do
+        memoize(method_name) if MEMOIZE_METHODS.include?(method_name)
+      end
+    end
+
     # Memoize the named method
     #
     # @param [Symbol] method_name
diff --git a/spec/unit/adamantium/hash_spec.rb b/spec/unit/adamantium/hash_spec.rb
index b3ee3cd..8f82840 100644
--- a/spec/unit/adamantium/hash_spec.rb
+++ b/spec/unit/adamantium/hash_spec.rb
@@ -6,8 +6,18 @@
 describe Adamantium, '#hash' do
   subject { object.hash }
 
-  let(:object)          { described_class.new     }
-  let(:described_class) { AdamantiumSpecs::Object }
+  let(:object) { described_class.new }
+
+  let(:described_class) do
+    Class.new(AdamantiumSpecs::Object) do
+      FIXNUM_MAX = 2**(0.size * 8 - 2) - 1
+      FIXNUM_MIN = -2**(0.size * 8 - 2)
+
+      def hash
+        Random.rand(FIXNUM_MIN..FIXNUM_MAX)
+      end
+    end
+  end
 
   it_behaves_like 'a hash method'
 end
diff --git a/spec/unit/adamantium/inspect_spec.rb b/spec/unit/adamantium/inspect_spec.rb
index 83e073a..20d8066 100644
--- a/spec/unit/adamantium/inspect_spec.rb
+++ b/spec/unit/adamantium/inspect_spec.rb
@@ -6,8 +6,15 @@
 describe Adamantium, '#inspect' do
   subject { object.inspect }
 
-  let(:object)          { described_class.new     }
-  let(:described_class) { AdamantiumSpecs::Object }
+  let(:object) { described_class.new }
+
+  let(:described_class) do
+    Class.new(AdamantiumSpecs::Object) do
+      def inspect
+        rand.to_s
+      end
+    end
+  end
 
   it_behaves_like 'an idempotent method'
 end
diff --git a/spec/unit/adamantium/to_s_spec.rb b/spec/unit/adamantium/to_s_spec.rb
index 987334e..fe97d91 100644
--- a/spec/unit/adamantium/to_s_spec.rb
+++ b/spec/unit/adamantium/to_s_spec.rb
@@ -6,8 +6,15 @@
 describe Adamantium, '#to_s' do
   subject { object.to_s }
 
-  let(:object)          { described_class.new     }
-  let(:described_class) { AdamantiumSpecs::Object }
+  let(:object) { described_class.new }
+
+  let(:described_class) do
+    Class.new(AdamantiumSpecs::Object) do
+      def to_s
+        rand.to_s
+      end
+    end
+  end
 
   it_behaves_like 'an idempotent method'
 end