Merge branch 'upstream/sam'

lib/extlib.rb

@@ -22,9 +22,12 @@
 
 require dir / 'assertions'
 require dir / 'blank'
+require dir / 'boolean'
 require dir / 'inflection'
 require dir / 'lazy_array'
 require dir / 'module'
+require dir / 'nil'
+require dir / 'numeric'
 require dir / 'blank'
 require dir / 'pooling'
 require dir / 'simple_set'

lib/extlib/boolean.rb

@@ -0,0 +1,11 @@
+class TrueClass
+  def try_dup
+    self
+  end
+end
+
+class FalseClass
+  def try_dup
+    self
+  end
+end

lib/extlib/module.rb

@@ -6,6 +6,10 @@ def find_const(const_name)
       nested_const_lookup(const_name)
     end
   end
+
+  def try_dup
+    self
+  end
 
   private
 

lib/extlib/nil.rb

@@ -0,0 +1,5 @@
+class NilClass
+  def try_dup
+    self
+  end
+end

lib/extlib/numeric.rb

@@ -0,0 +1,5 @@
+class Numeric
+  def try_dup
+    self
+  end
+end

lib/extlib/object.rb

@@ -129,6 +129,13 @@ def quacks_like?(duck)
     end
   end
 
+  # Override this in a child if it cannot be dup'ed
+  #
+  # @return <Object>
+  def try_dup
+    self.dup
+  end
+
   # @param arrayish<#include?> Container to check, to see if it includes the object.
   # @param *more<Array>:: additional args, will be flattened into arrayish
   #

spec/try_dup_spec.rb

@@ -0,0 +1,39 @@
+require File.expand_path(File.join(File.dirname(__FILE__), 'spec_helper'))
+
+describe "try_dup" do
+  it "returns a duplicate version on regular objects" do
+    obj = Object.new
+    oth = obj.try_dup
+    obj.should_not === oth
+  end
+
+  it "returns self on Numerics" do
+    obj = 12
+    oth = obj.try_dup
+    obj.should === oth
+  end
+
+  it "returns self on true" do
+    obj = true
+    oth = obj.try_dup
+    obj.should === oth
+  end
+
+  it "returns self on false" do
+    obj = false
+    oth = obj.try_dup
+    obj.should === oth
+  end
+
+  it "returns self on nil" do
+    obj = nil
+    oth = obj.try_dup
+    obj.should === oth
+  end
+
+  it "returns self on modules" do
+    obj = Extlib
+    oth = obj.try_dup
+    obj.object_id.should == oth.object_id
+  end
+end