MemberRelationship.cs

Go to the documentation of this file.

using System.Diagnostics.CodeAnalysis;
 
namespace System.ComponentModel.Design.Serialization;
 
public readonly struct MemberRelationship
{
    public static readonly MemberRelationship Empty;
 
    public bool IsEmpty => Owner == null;
 
    public MemberDescriptor Member { get; }
 
    public object? Owner { get; }
 
    public MemberRelationship(object owner, MemberDescriptor member)
    {
        Owner = owner ?? throw new ArgumentNullException("owner");
        Member = member ?? throw new ArgumentNullException("member");
    }
 
    public override bool Equals([NotNullWhen(true)] object? obj)
    {
        if (obj is MemberRelationship memberRelationship && memberRelationship.Owner == Owner)
        {
            return memberRelationship.Member == Member;
        }
        return false;
    }
 
    public override int GetHashCode()
    {
        if (Owner == null)
        {
            return base.GetHashCode();
        }
        return Owner.GetHashCode() ^ Member.GetHashCode();
    }
 
    public static bool operator ==(MemberRelationship left, MemberRelationship right)
    {
        if (left.Owner == right.Owner)
        {
            return left.Member == right.Member;
        }
        return false;
    }
 
    public static bool operator !=(MemberRelationship left, MemberRelationship right)
    {
        return !(left == right);
    }
}