Implemented staging-style named class definition when implementing interfaces

lib/class.js

@@ -308,6 +308,17 @@ function createStaging( cname )
 
             return extend.apply( null, args );
         },
+
+        implement: function()
+        {
+            // implement on empty base, providing the class name to be used once
+            // extended
+            return createImplement(
+                extend( {} ),
+                Array.prototype.slice.call( arguments ),
+                cname
+            );
+        },
     };
 }
 
@@ -320,12 +331,13 @@ function createStaging( cname )
  * called, as it does not make sense to create a class without any
  * body/definition.
  *
- * @param  {Object}  base    base class to implement atop of
- * @param  {Array}   ifaces  interfaces to implement
+ * @param  {Object}   base    base class to implement atop of
+ * @param  {Array}    ifaces  interfaces to implement
+ * @param  {string=}  cname   optional class name once extended
  *
  * @return  {Object}  intermediate implementation object
  */
-function createImplement( base, ifaces )
+function createImplement( base, ifaces, cname )
 {
     ifaces.push( base );
 
@@ -334,6 +346,12 @@ function createImplement( base, ifaces )
     return {
         extend: function( def )
         {
+            // if a name was provided, use it
+            if ( cname )
+            {
+                def.__name = cname;
+            }
+
             return extend.apply( null, [
                 implement.apply( this, ifaces ),
                 def

test/test-class-name.js

@@ -24,7 +24,9 @@
 
 var common = require( './common' ),
     assert = require( 'assert' ),
-    Class  = common.require( 'class' )
+
+    Class     = common.require( 'class' ),
+    Interface = common.require( 'interface' )
 ;
 
 
@@ -158,8 +160,9 @@ var common = require( './common' ),
  */
 ( function testCanCreateNamedClassUsingStagingMethod()
 {
-    var name  = 'Foo',
-        named = Class( name ).extend( {} )
+    var name   = 'Foo',
+        named  = Class( name ).extend( {} )
+        namedi = Class( name ).implement( Interface( {} ) ).extend( {} )
     ;
 
     // ensure what was returned is a valid class
@@ -176,5 +179,20 @@ var common = require( './common' ),
         '[object Class <' + name + '>]',
         "Name is set on named clas via staging method"
     );
+
+
+    // we should also be able to implement interfaces
+    assert.equal(
+        Class.isClass( namedi ),
+        true,
+        "Named class generated via staging method, implementing an " +
+            "interface, is considered to be a valid class"
+    );
+
+    assert.equal(
+        namedi.toString(),
+        '[object Class <' + name + '>]',
+        "Name is set on named class via staging method when implementing"
+    );
 } )();