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8c763fb | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | // Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Linq.Expressions;
namespace System.Management.Automation.ComInterop
{
/// <summary>
/// ArgBuilder provides an argument value used by the MethodBinder. One ArgBuilder exists for each
/// physical parameter defined on a method.
///
/// Contrast this with ParameterWrapper which represents the logical argument passed to the method.
/// </summary>
internal abstract class ArgBuilder
{
/// <summary>
/// Provides the Expression which provides the value to be passed to the argument.
/// </summary>
internal abstract Expression Marshal(Expression parameter);
/// <summary>
/// Provides the Expression which provides the value to be passed to the argument.
/// This method is called when result is intended to be used ByRef.
/// </summary>
internal virtual Expression MarshalToRef(Expression parameter)
{
return Marshal(parameter);
}
/// <summary>
/// Provides an Expression which will update the provided value after a call to the method.
/// May return null if no update is required.
/// </summary>
internal virtual Expression UnmarshalFromRef(Expression newValue)
{
return newValue;
}
}
}
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