public NodeTypeTest(Axes axis, XPathNodeType type, string param) : base(axis)
{
this.type = type;
this._param = param;
if (param != null && type != XPathNodeType.ProcessingInstruction)
{
throw new XPathException("No argument allowed for " + NodeTypeTest.ToString(type) + "() test");
}
}
public override string ToString()
{
string text = NodeTypeTest.ToString(this.type);
if (this.type == XPathNodeType.ProcessingInstruction && this._param != null)
{
text = text + "('" + this._param + "')";
}
else
{
text += "()";
}
return(this._axis.ToString() + "::" + text);
}
public override Expression Optimize()
{
this.left = this.left.Optimize();
this.right = (NodeSet)this.right.Optimize();
NodeTest nodeTest = this.right as NodeTest;
if (nodeTest != null && nodeTest.Axis.Axis == Axes.Child)
{
NodeNameTest nodeNameTest = nodeTest as NodeNameTest;
if (nodeNameTest != null)
{
return(new ExprSLASH(this.left, new NodeNameTest(nodeNameTest, Axes.Descendant)));
}
NodeTypeTest nodeTypeTest = nodeTest as NodeTypeTest;
if (nodeTypeTest != null)
{
return(new ExprSLASH(this.left, new NodeTypeTest(nodeTypeTest, Axes.Descendant)));
}
}
return(this);
}
internal NodeTypeTest(NodeTypeTest other, Axes axis) : base(axis)
{
this.type = other.type;
this._param = other._param;
}