/// <param name="slashes">
/// is copied to _slashes </param>
/// <param name="expr">
/// is copied to _expr _next is made null as a result. </param>
public XPathExpr(int slashes, bool is_predicate, StepExpr expr)
{
_slashes = slashes;
_predicate = is_predicate;
_expr = expr;
_next = null;
}
/// <summary>
/// Add to tail of path
/// </summary>
// XXX: keep ref to last
public virtual void add_tail(int slashes, StepExpr expr)
{
XPathExpr last = this;
XPathExpr next = _next;
while (next != null)
{
last = next;
next = last.next();
}
XPathExpr item = new XPathExpr(slashes, false, expr);
last.set_next(item);
}
/// <summary>
/// an XPath expression, n is copied to _next
/// </summary>
public virtual void set_next(XPathExpr n)
{
_next = n;
}