PropertyByRefUpdater.cs

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using System.Dynamic.Utils;
using System.Reflection;
 
namespace System.Linq.Expressions.Interpreter;
 
internal sealed class PropertyByRefUpdater : ByRefUpdater
{
    private readonly LocalDefinition? _object;
 
    private readonly PropertyInfo _property;
 
    public PropertyByRefUpdater(LocalDefinition? obj, PropertyInfo property, int argumentIndex)
        : base(argumentIndex)
    {
        _object = obj;
        _property = property;
    }
 
    public override void Update(InterpretedFrame frame, object value)
    {
        object obj = ((!_object.HasValue) ? null : frame.Data[_object.GetValueOrDefault().Index]);
        try
        {
            _property.SetValue(obj, value);
        }
        catch (TargetInvocationException exception)
        {
            ExceptionHelpers.UnwrapAndRethrow(exception);
            throw ContractUtils.Unreachable;
        }
    }
 
    public override void UndefineTemps(InstructionList instructions, LocalVariables locals)
    {
        if (_object.HasValue)
        {
            locals.UndefineLocal(_object.GetValueOrDefault(), instructions.Count);
        }
    }
}