Refactored interface module invocation into separate functions for named and anonymous

lib/interface.js

@@ -42,38 +42,20 @@ var util           = require( './util' ),
  */
 module.exports = function()
 {
-    var def  = {},
-        name = '',
-        type = typeof arguments[ 0 ]
+    var type   = typeof arguments[ 0 ]
+        result = null
     ;
 
     switch ( type )
     {
         // anonymous interface
         case 'object':
-            def = arguments[ 0 ];
-
-            // ensure we have the proper number of arguments (if they passed in
-            // too many, it may signify that they don't know what they're doing,
-            // and likely they're not getting the result they're looking for)
-            if ( arguments.length > 1 )
-            {
-                throw Error(
-                    "Expecting one argument for Interface definition; " +
-                        arguments.length + " given."
-                );
-            }
-
+            result = createAnonymousInterface.apply( null, arguments );
             break;
 
         // named class
         case 'string':
-            name = arguments[ 0 ];
-            def  = arguments[ 1 ];
-
-            // add the name to the definition
-            def.__name = name;
-
+            result = createNamedInterface.apply( null, arguments );
             break;
 
         default:
@@ -84,7 +66,7 @@ module.exports = function()
             );
     }
 
-    return extend( def );
+    return result;
 };
 
 
@@ -127,6 +109,47 @@ module.exports.isInterface = function( obj )
 function Interface() {}
 
 
+/**
+ * Creates a new anonymous Interface from the given interface definition
+ *
+ * @param  {Object}  def  interface definition
+ *
+ * @return  {Interface}  new anonymous interface
+ */
+function createAnonymousInterface( def )
+{
+    // ensure we have the proper number of arguments (if they passed in
+    // too many, it may signify that they don't know what they're doing,
+    // and likely they're not getting the result they're looking for)
+    if ( arguments.length > 1 )
+    {
+        throw Error(
+            "Expecting one argument for Interface definition; " +
+                arguments.length + " given."
+        );
+    }
+
+    return extend( def );
+}
+
+
+/**
+ * Creates a new named interface from the given interface definition
+ *
+ * @param  {string}  name  interface name
+ * @param  {Object}  def   interface definition
+ *
+ * @return  {Interface}  new named interface
+ */
+function createNamedInterface( name, def )
+{
+    // add the name to the definition
+    def.__name = name;
+
+    return extend( def );
+}
+
+
 var extend = ( function( extending )
 {
     return function extend()