Feature/empty values are nil

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    optional (0.0.5)
+    optional (0.0.6)
 
 GEM
   remote: https://rubygems.org/

lib/optional/option.rb

@@ -2,7 +2,7 @@ module Option
   include Option::Enumerable
 
   def self.[] value
-    value.nil? ? None : Some[value]
+    Empty[value] ? None : Some[value]
   end
 
   def match(&block)
@@ -24,5 +24,4 @@ def from_array(values)
   def from_value(value)
     value.nil? ? None : Some[value]
   end
-
 end

lib/optional/option/all.rb

@@ -1,3 +1,4 @@
+require_relative 'empty'
 require_relative 'enumerable'
 require_relative 'errors'
 require_relative 'match'

lib/optional/option/empty.rb

@@ -0,0 +1,7 @@
+module Option
+  class Empty
+    def self.[] value
+      value.respond_to?(:empty?) ? value.empty? : !value
+    end
+  end
+end

spec/lib/optional/option_spec.rb

@@ -46,4 +46,16 @@
   it 'can create a none from a passed value' do
     Option[nil].should be_none
   end
+
+  it 'treats empty strings as none' do
+    Option[""].should be_none
+  end
+
+  it 'treats empty collections as none' do
+    Option[[]].should be_none
+  end
+
+  it 'treats empty hashes as none' do
+    Option[{}].should be_none
+  end
 end