/IronPython_Main/Languages/Ruby/Libraries.LCA_RESTRICTED/Builtins/NilClassOps.cs

/* ****************************************************************************

 *

 * Copyright (c) Microsoft Corporation. 

 *

 * This source code is subject to terms and conditions of the Apache License, Version 2.0. A 

 * copy of the license can be found in the License.html file at the root of this distribution. If 

 * you cannot locate the  Apache License, Version 2.0, please send an email to 

 * ironruby@microsoft.com. By using this source code in any fashion, you are agreeing to be bound 

 * by the terms of the Apache License, Version 2.0.

 *

 * You must not remove this notice, or any other, from this software.

 *

 *

 * ***************************************************************************/



using System;

using System.Diagnostics;

using System.Runtime.CompilerServices;

using IronRuby.Runtime;

using Microsoft.Scripting.Runtime;



namespace IronRuby.Builtins {



    [RubyClass("NilClass", Extends = typeof(DynamicNull))]

    public static class NilClassOps {

        #region CLR overrides



        [RubyMethod("GetType")]

        public static Type GetClrType(object self) {

            return typeof(DynamicNull);

        }



        [RubyMethod("ToString")]

        public static string ToClrString(object self) {

            return "nil";

        }



        [RubyMethod("GetHashCode")]

        public static int GetClrHashCode(object self) {

            return 0;

        }



        #endregion



        #region Public Instance Methods



        [RubyMethodAttribute("&")]

        public static bool And(object self, object obj) {

            Debug.Assert(self == null);

            return false;

        }



        [RubyMethodAttribute("^")]

        public static bool Xor(object self, object obj) {

            Debug.Assert(self == null);

            return obj != null;

        }



        [RubyMethodAttribute("^")]

        public static bool Xor(object self, bool obj) {

            Debug.Assert(self == null);

            return obj;

        }



        [RubyMethodAttribute("|")]

        public static bool Or(object self, object obj) {

            Debug.Assert(self == null);

            return obj != null;

        }



        [RubyMethodAttribute("|")]

        public static bool Or(object self, bool obj) {

            Debug.Assert(self == null);

            return obj;

        }



        [RubyMethodAttribute("nil?")]

        public static bool IsNil(object self) {

            Debug.Assert(self == null);

            return true;

        }



        [RubyMethodAttribute("to_a")]

        public static RubyArray/*!*/ ToArray(object self) {

            Debug.Assert(self == null);

            return new RubyArray();

        }



        [RubyMethodAttribute("to_f")]

        public static double ToDouble(object self) {

            Debug.Assert(self == null);

            return 0.0;

        }



        [RubyMethodAttribute("to_i")]

        public static int ToInteger(object self) {

            Debug.Assert(self == null);

            return 0;

        }



        [RubyMethodAttribute("inspect")]

        public static MutableString Inspect(object self) {

            return MutableString.CreateAscii("nil");

        }



        [RubyMethodAttribute("to_s")]

        public static MutableString/*!*/ ToString(object self) {

            Debug.Assert(self == null);

            return MutableString.CreateEmpty();

        }



        [SpecialName]

        public static bool op_Implicit(DynamicNull self) {

            Debug.Assert(self == null);

            return false;

        }



        #endregion

    }

}