62 lines
2.1 KiB
C#
62 lines
2.1 KiB
C#
/* ****************************************************************************
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*
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* Copyright (c) Microsoft Corporation.
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*
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* This source code is subject to terms and conditions of the Microsoft Public License. A
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* copy of the license can be found in the License.html file at the root of this distribution. If
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* you cannot locate the Microsoft Public License, please send an email to
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* dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound
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* by the terms of the Microsoft Public License.
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*
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* You must not remove this notice, or any other, from this software.
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*
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*
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* ***************************************************************************/
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using System; using Microsoft;
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#if !SILVERLIGHT
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#if CODEPLEX_40
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using System.Linq.Expressions;
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#else
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using Microsoft.Linq.Expressions;
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#endif
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#if CODEPLEX_40
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namespace System.Dynamic {
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#else
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namespace Microsoft.Scripting {
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#endif
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/// <summary>
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/// ArgBuilder provides an argument value used by the MethodBinder. One ArgBuilder exists for each
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/// physical parameter defined on a method.
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///
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/// Contrast this with ParameterWrapper which represents the logical argument passed to the method.
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/// </summary>
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internal abstract class ArgBuilder {
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/// <summary>
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/// Provides the Expression which provides the value to be passed to the argument.
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/// </summary>
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internal abstract Expression Marshal(Expression parameter);
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/// <summary>
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/// Provides the Expression which provides the value to be passed to the argument.
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/// This method is called when result is intended to be used ByRef.
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/// </summary>
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internal virtual Expression MarshalToRef(Expression parameter) {
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return Marshal(parameter);
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}
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/// <summary>
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/// Provides an Expression which will update the provided value after a call to the method.
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/// May return null if no update is required.
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/// </summary>
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internal virtual Expression UnmarshalFromRef(Expression newValue) {
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return newValue;
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}
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}
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}
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#endif
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