Flags.hx

abstract Flags(Int) {

	public inline function new(i = 0) {
		this = i;
	}

	public inline function has( index : Int ) : Bool {
		return this & (1 << index) != 0;
	}

	public inline function set( index: Int ) : Void {
		this |= 1 << index;
	}

	public inline function unset( index: Int ) : Void {
		this &= 0xFFFFFFF - (1 << index);
	}
	
	macro static public function make(exprs:Array<haxe.macro.Expr>) {
	  var ret = 0;
	  exprs.reverse();
	  
	  for (e in exprs) 
	    ret = (ret << 1) +
  	    switch e {
  	      case macro true, macro 1: 1;
  	      case macro false, macro 0: 0;
  	      default: haxe.macro.Context.error('should be either of true, false, 1 or 0', e.pos);
  	    }
  	
  	return macro new Flags($v{ret});
	}
}