DocumentHandle.cs

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namespace System.Reflection.Metadata;
 
public readonly struct DocumentHandle : IEquatable<DocumentHandle>
{
    private readonly int _rowId;
 
    public bool IsNil => RowId == 0;
 
    internal int RowId => _rowId;
 
    private DocumentHandle(int rowId)
    {
        _rowId = rowId;
    }
 
    internal static DocumentHandle FromRowId(int rowId)
    {
        return new DocumentHandle(rowId);
    }
 
    public static implicit operator Handle(DocumentHandle handle)
    {
        return new Handle(48, handle._rowId);
    }
 
    public static implicit operator EntityHandle(DocumentHandle handle)
    {
        return new EntityHandle((uint)(0x30000000uL | (ulong)handle._rowId));
    }
 
    public static explicit operator DocumentHandle(Handle handle)
    {
        if (handle.VType != 48)
        {
            Throw.InvalidCast();
        }
        return new DocumentHandle(handle.RowId);
    }
 
    public static explicit operator DocumentHandle(EntityHandle handle)
    {
        if (handle.VType != 805306368)
        {
            Throw.InvalidCast();
        }
        return new DocumentHandle(handle.RowId);
    }
 
    public static bool operator ==(DocumentHandle left, DocumentHandle right)
    {
        return left._rowId == right._rowId;
    }
 
    public override bool Equals(object? obj)
    {
        if (obj is DocumentHandle documentHandle)
        {
            return documentHandle._rowId == _rowId;
        }
        return false;
    }
 
    public bool Equals(DocumentHandle other)
    {
        return _rowId == other._rowId;
    }
 
    public override int GetHashCode()
    {
        return _rowId.GetHashCode();
    }
 
    public static bool operator !=(DocumentHandle left, DocumentHandle right)
    {
        return left._rowId != right._rowId;
    }
}