1 files changed, 35 insertions, 0 deletions
diff --git a/dom/xslt/xpath/txErrorExpr.cpp b/dom/xslt/xpath/txErrorExpr.cpp
new file mode 100644
index 0000000000..806b324259
--- /dev/null
+++ b/dom/xslt/xpath/txErrorExpr.cpp
@@ -0,0 +1,35 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsError.h"
+#include "txExpr.h"
+#include "nsString.h"
+#include "txIXPathContext.h"
+
+nsresult txErrorExpr::evaluate(txIEvalContext* aContext,
+                               txAExprResult** aResult) {
+  *aResult = nullptr;
+
+  nsAutoString err(u"Invalid expression evaluated"_ns);
+#ifdef TX_TO_STRING
+  err.AppendLiteral(": ");
+  toString(err);
+#endif
+  aContext->receiveError(err, NS_ERROR_XPATH_INVALID_EXPRESSION_EVALUATED);
+
+  return NS_ERROR_XPATH_INVALID_EXPRESSION_EVALUATED;
+}
+
+TX_IMPL_EXPR_STUBS_0(txErrorExpr, ANY_RESULT)
+
+bool txErrorExpr::isSensitiveTo(ContextSensitivity aContext) {
+  // It doesn't really matter what we return here, but it might
+  // be a good idea to try to keep this as unoptimizable as possible
+  return true;
+}
+
+#ifdef TX_TO_STRING
+void txErrorExpr::toString(nsAString& aStr) { aStr.Append(mStr); }
+#endif