VVVVVV/mobile_version/src/starling/utils/execute.as

// =================================================================================================
//
//	Starling Framework
//	Copyright Gamua GmbH. All Rights Reserved.
//
//	This program is free software. You can redistribute and/or modify it
//	in accordance with the terms of the accompanying license agreement.
//
// =================================================================================================

package starling.utils
{
    /** Executes a function with the specified arguments. If the argument count does not match
     *  the function, the argument list is cropped / filled up with <code>null</code> values. */
    public function execute(func:Function, ...args):void
    {
        if (func != null)
        {
            var i:int;
            var maxNumArgs:int = func.length;

            for (i=args.length; i<maxNumArgs; ++i)
                args[i] = null;

            // In theory, the 'default' case would always work,
            // but we want to avoid the 'slice' allocations.

            switch (maxNumArgs)
            {
                case 0:  func(); break;
                case 1:  func(args[0]); break;
                case 2:  func(args[0], args[1]); break;
                case 3:  func(args[0], args[1], args[2]); break;
                case 4:  func(args[0], args[1], args[2], args[3]); break;
                case 5:  func(args[0], args[1], args[2], args[3], args[4]); break;
                case 6:  func(args[0], args[1], args[2], args[3], args[4], args[5]); break;
                case 7:  func(args[0], args[1], args[2], args[3], args[4], args[5], args[6]); break;
                default: func.apply(null, args.slice(0, maxNumArgs)); break;
            }
        }
    }
}