reworked how we add args to list

src/Arg.cpp

@@ -290,4 +290,12 @@ void Arg::xorSet()
 	_xorSet = true;
 }
 
+/**
+ * Overridden by Args that need to added to the end of the list.
+ */
+void Arg::addToList( list<Arg*>& argList ) const
+{
+	argList.push_front( (Arg*)this );
+}
+
 }

src/CmdLine.cpp

@@ -101,10 +101,7 @@ void CmdLine::add( Arg* a )
 		return;
 	}
 
-	if ( a->getFlag() == "" )
+	a->addToList( _argList );
-		_argList.push_back( a );
-	else
-		_argList.push_front( a );
 
 	if ( a->isRequired() ) _numRequired++;	
 
@@ -201,4 +198,5 @@ bool CmdLine::_emptyCombined(const string& s)
 
 	return true;
 }
+
 }