PowerShell-master/src/System.Management.Automation/engine/ComInterop/ConvertArgBuilder.cs

// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using System;
using System.Linq.Expressions;

namespace System.Management.Automation.ComInterop
{
    internal class ConvertArgBuilder : SimpleArgBuilder
    {
        private readonly Type _marshalType;

        internal ConvertArgBuilder(Type parameterType, Type marshalType)
            : base(parameterType)
        {
            _marshalType = marshalType;
        }

        internal override Expression Marshal(Expression parameter)
        {
            parameter = base.Marshal(parameter);
            return Expression.Convert(parameter, _marshalType);
        }

        internal override Expression UnmarshalFromRef(Expression newValue)
        {
            return base.UnmarshalFromRef(Expression.Convert(newValue, ParameterType));
        }
    }
}