dom/xslt/xpath/txErrorExpr.cpp

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "nsError.h"
   7 #include "txExpr.h"
   8 #include "nsString.h"
   9 #include "txIXPathContext.h"
  10
  11 nsresult
  12 txErrorExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult)
  13 {
  14     *aResult = nullptr;
  15
  16     nsAutoString err(NS_LITERAL_STRING("Invalid expression evaluated"));
  17 #ifdef TX_TO_STRING
  18     err.AppendLiteral(": ");
  19     toString(err);
  20 #endif
  21     aContext->receiveError(err,
  22                            NS_ERROR_XPATH_INVALID_EXPRESSION_EVALUATED);
  23
  24     return NS_ERROR_XPATH_INVALID_EXPRESSION_EVALUATED;
  25 }
  26
  27 TX_IMPL_EXPR_STUBS_0(txErrorExpr, ANY_RESULT)
  28
  29 bool
  30 txErrorExpr::isSensitiveTo(ContextSensitivity aContext)
  31 {
  32     // It doesn't really matter what we return here, but it might
  33     // be a good idea to try to keep this as unoptimizable as possible
  34     return true;
  35 }
  36
  37 #ifdef TX_TO_STRING
  38 void
  39 txErrorExpr::toString(nsAString& aStr)
  40 {
  41     aStr.Append(mStr);
  42 }
  43 #endif