/// <summary>
/// Gets list of direct child nodes.
/// Cannot be <c>null</c>.
/// </summary>
public ReadOnlySpan <ILangElement> GetChildren(ILangElement element)
{
if (element != null)
{
_childrenCount = 0;
element.VisitMe(this);
return(_children.AsSpan(0, _childrenCount));
}
//
return(ReadOnlySpan <ILangElement> .Empty);
}
/// <summary>
/// Visit language element and all children recursively.
/// Depth-first search.
/// </summary>
/// <param name="element">Any LanguageElement. Can be null.</param>
public virtual void VisitElement(ILangElement element)
{
element?.VisitMe(this);
}