/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/* 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(NS_LITERAL_STRING("Invalid expression evaluated"));

#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