/IronPython_Main/Runtime/Microsoft.Dynamic/Interpreter/Instructions/DynamicSplatInstruction.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 

 * dlr@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.Collections.Generic;

using System.Runtime.CompilerServices;

using System.Reflection;



using Microsoft.Scripting.Utils;

using Microsoft.Scripting.Ast;

using Microsoft.Scripting.Runtime;



namespace Microsoft.Scripting.Interpreter {

    /// <summary>

    /// Implements dynamic call site with many arguments. Wraps the arguments into <see cref="ArgumentArray"/>.

    /// </summary>

    internal sealed partial class DynamicSplatInstruction : Instruction {

        private readonly CallSite<Func<CallSite, ArgumentArray, object>> _site;

        private readonly int _argumentCount;



        internal DynamicSplatInstruction(int argumentCount, CallSite<Func<CallSite, ArgumentArray, object>> site) {

            _site = site;

            _argumentCount = argumentCount;

        }



        public override int ProducedStack { get { return 1; } }

        public override int ConsumedStack { get { return _argumentCount; } }



        public override int Run(InterpretedFrame frame) {

            int first = frame.StackIndex - _argumentCount;

            object ret = _site.Target(_site, new ArgumentArray(frame.Data, first, _argumentCount));

            frame.Data[first] = ret;

            frame.StackIndex = first + 1;



            return 1;

        }



        public override string ToString() {

            return "DynamicSplatInstruction(" + _site + ")";

        }

    }

}