ValueTypeFixupInfo.cs

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using System.Reflection;
 
namespace System.Runtime.Serialization;
 
internal sealed class ValueTypeFixupInfo
{
    private readonly long _containerID;
 
    private readonly FieldInfo _parentField;
 
    private readonly int[] _parentIndex;
 
    public long ContainerID => _containerID;
 
    public FieldInfo ParentField => _parentField;
 
    public int[] ParentIndex => _parentIndex;
 
    public ValueTypeFixupInfo(long containerID, FieldInfo member, int[] parentIndex)
    {
        if (member == null && parentIndex == null)
        {
            throw new ArgumentException(System.SR.Argument_MustSupplyParent);
        }
        if (containerID == 0L && member == null)
        {
            _containerID = containerID;
            _parentField = member;
            _parentIndex = parentIndex;
        }
        if (member != null)
        {
            if (parentIndex != null)
            {
                throw new ArgumentException(System.SR.Argument_MemberAndArray);
            }
            if (member.FieldType.IsValueType && containerID == 0L)
            {
                throw new ArgumentException(System.SR.Argument_MustSupplyContainer);
            }
        }
        _containerID = containerID;
        _parentField = member;
        _parentIndex = parentIndex;
    }
}