/// <summary>
/// Returns a value indicating the results of a comparison between two <see cref="SqlHierarchyId"/> nodes.
/// </summary>
/// <param name="hid">A <see cref="SqlHierarchyId"/> node to compare to this.</param>
/// <returns>A 32-bit signed integer that indicates the relative order of the objects being compared. The return value has these meanings:
/// <list type="table">
/// <listheader>
/// <term>Value</term>
/// <description>Meaning</description>
/// </listheader>
/// <item><term>Less than zero</term><description>this is less than <paramref name="hid"/>.</description></item>
/// <item><term>Zero</term><description>this is equal to <paramref name="hid"/>.</description></item>
/// <item><term>Greater than zero</term><description>this is greater than <paramref name="hid"/>.</description></item>
/// </list>
/// </returns>
/// <remarks>
/// If both <see cref="SqlHierarchyId"/> nodes are null, returns 0.
/// If one <see cref="SqlHierarchyId"/> node is null, it is considered to be less than the non-null <see cref="SqlHierarchyId"/> node.
/// </remarks>
public int CompareTo(SqlHierarchyId hid)
{
if (IsNull)
{
if (!hid.IsNull)
{
return(-1);
}
return(0);
}
if (hid.IsNull)
{
return(1);
}
if (this < hid)
{
return(-1);
}
if (this > hid)
{
return(1);
}
return(0);
}
public SqlHierarchyId GetDescendant(SqlHierarchyId child1, SqlHierarchyId child2) => new SqlHierarchyId(_imp.GetDescendant(child1.IsNull ? default(HierarchyId?) : child1._imp, child2.IsNull ? default(HierarchyId?) : child2._imp));
public SqlBoolean IsDescendantOf(SqlHierarchyId parent) => _imp.IsDescendantOf(parent._imp);
private bool Equals(SqlHierarchyId other) => (IsNull && other.IsNull) || (this == other).IsTrue;
