Merged the other node comparison functions into the refactor.

node.cpp

@@ -65,6 +65,9 @@ namespace Sass {
     return false;
   }
   
+  bool Node::operator!=(Node rhs) const
+  { return !(*this == rhs); }
+  
   bool Node::operator<(Node rhs) const
   {
     Type lhs_type = type();
@@ -86,6 +89,15 @@ namespace Sass {
       throw Error(Error::evaluation, line_number(), file_name(), "incomparable types");
     }
   }
+  
+  bool Node::operator<=(Node rhs) const
+  { return *this < rhs || *this == rhs; }
+  
+  bool Node::operator>(Node rhs) const
+  { return !(*this <= rhs); }
+  
+  bool Node::operator>=(Node rhs) const
+  { return !(*this < rhs); }
 
 
   // ------------------------------------------------------------------------

node.hpp

@@ -180,7 +180,11 @@ namespace Sass {
     Token  unit() const;
     
     bool operator==(Node rhs) const;
+    bool operator!=(Node rhs) const;
     bool operator<(Node rhs) const;
+    bool operator<=(Node rhs) const;
+    bool operator>(Node rhs) const;
+    bool operator>=(Node rhs) const;
   };
   
   struct Node_Impl {

test_node_factory.cpp

@@ -39,5 +39,8 @@ int main()
   cout << (num3[2] < num2[2]) << endl;
   cout << (num2[3] < num3[3]) << endl << endl;
   
+  cout << (num2[2] >= num3[2]) << endl;
+  cout << (num2[3] != num3[3]) << endl << endl;
+  
   return 0;
 }
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