System.Xml.Xsl.IlGen.XmlILVisitor.TryNameCompare C# (CSharp) Method

        private bool TryNameCompare(QilNodeType relOp, QilNode ndFirst, QilNode ndSecond) {
            Debug.Assert(relOp == QilNodeType.Eq || relOp == QilNodeType.Ne);

            if (ndFirst.NodeType == QilNodeType.NameOf) {
                switch (ndSecond.NodeType) {
                    case QilNodeType.NameOf:
                    case QilNodeType.LiteralQName: {
                        this.helper.LoadQueryRuntime();

                        // Push left navigator onto the stack
                        NestedVisitEnsureStack((ndFirst as QilUnary).Child);

                        // Push the local name and namespace uri of the right argument onto the stack
                        if (ndSecond.NodeType == QilNodeType.LiteralQName) {
                            QilName ndName = ndSecond as QilName;
                            this.helper.LoadInteger(this.helper.StaticData.DeclareName(ndName.LocalName));
                            this.helper.LoadInteger(this.helper.StaticData.DeclareName(ndName.NamespaceUri));

                            // push runtime.IsQNameEqual(navigator, localName, namespaceUri)
                            this.helper.Call(XmlILMethods.QNameEqualLit);
                        }
                        else {
                            // Generate code to locate the navigator argument of NameOf operator
                            Debug.Assert(ndSecond.NodeType == QilNodeType.NameOf);
                            NestedVisitEnsureStack(ndSecond);

                            // push runtime.IsQNameEqual(nav1, nav2)
                            this.helper.Call(XmlILMethods.QNameEqualNav);
                        }

                        // Branch based on boolean result or push boolean value
                        ZeroCompare((relOp == QilNodeType.Eq) ? QilNodeType.Ne : QilNodeType.Eq, true);
                        return true;
                    }
                }
            }

            // Caller must perform comparison
            return false;
        }