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