public static Instruction CreateLifted(Type type)
        {
            Debug.Assert(!type.IsEnum());
            switch (type.GetTypeCode())
            {
            case TypeCode.Int16: return(_Int16Lifted ?? (_Int16Lifted = new NegateInt16Lifted()));

            case TypeCode.Int32: return(_Int32Lifted ?? (_Int32Lifted = new NegateInt32Lifted()));

            case TypeCode.Int64: return(_Int64Lifted ?? (_Int64Lifted = new NegateInt64Lifted()));

            case TypeCode.UInt16: return(_UInt16Lifted ?? (_UInt16Lifted = new NegateUInt16Lifted()));

            case TypeCode.UInt32: return(_UInt32Lifted ?? (_UInt32Lifted = new NegateUInt32Lifted()));

            case TypeCode.Single: return(_SingleLifted ?? (_SingleLifted = new NegateSingleLifted()));

            case TypeCode.Double: return(_DoubleLifted ?? (_DoubleLifted = new NegateDoubleLifted()));

            default:
                throw Assert.Unreachable;
            }
        }
        public static Instruction CreateLifted(Type type) {
            Debug.Assert(!type.IsEnum());
            switch (type.GetTypeCode()) {
                case TypeCode.Int16: return _Int16Lifted ?? (_Int16Lifted = new NegateInt16Lifted());
                case TypeCode.Int32: return _Int32Lifted ?? (_Int32Lifted = new NegateInt32Lifted());
                case TypeCode.Int64: return _Int64Lifted ?? (_Int64Lifted = new NegateInt64Lifted());
                case TypeCode.UInt16: return _UInt16Lifted ?? (_UInt16Lifted = new NegateUInt16Lifted());
                case TypeCode.UInt32: return _UInt32Lifted ?? (_UInt32Lifted = new NegateUInt32Lifted());
                case TypeCode.Single: return _SingleLifted ?? (_SingleLifted = new NegateSingleLifted());
                case TypeCode.Double: return _DoubleLifted ?? (_DoubleLifted = new NegateDoubleLifted());

                default:
                    throw Assert.Unreachable;
            }
        }