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

 Copyright (C) 2007 Ferdinando Ametrano
 Copyright (C) 2007 Fran├žois du Vignaud
 Copyright (C) 2004, 2005, 2007 StatPro Italia srl

 This file is part of QuantLib, a free-software/open-source library
 for financial quantitative analysts and developers - http://quantlib.org/

 QuantLib is free software: you can redistribute it and/or modify it
 under the terms of the QuantLib license.  You should have received a
 copy of the license along with this program; if not, please email
 <quantlib-dev@lists.sf.net>. The license is also available online at

 This program is distributed in the hope that it will be useful, but WITHOUT
 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 FOR A PARTICULAR PURPOSE.  See the license for more details.

#include <ql/settings.hpp>

namespace QuantLib {

    Settings::DateProxy::DateProxy() : ObservableValue<Date>(Date()) {}

    Settings::DateProxy::operator Date() const {
        if (value() == Date())
            return Date::todaysDate();
            return value();

    Settings::DateProxy& Settings::DateProxy::operator=(const Date& d) {
        return *this;

    std::ostream& operator<<(std::ostream& out,
                             const Settings::DateProxy& p) {
        return out << Date(p);

    : enforcesTodaysHistoricFixings_(false) {}

00050     Settings::DateProxy& Settings::evaluationDate() {
        return evaluationDate_;

    const Settings::DateProxy& Settings::evaluationDate() const {
        return evaluationDate_;

    bool& Settings::enforcesTodaysHistoricFixings() {
        return enforcesTodaysHistoricFixings_;

    bool Settings::enforcesTodaysHistoricFixings() const {
        return enforcesTodaysHistoricFixings_;

    : evaluationDate_(Settings::instance().evaluationDate()),
                      Settings::instance().enforcesTodaysHistoricFixings()) {}

    SavedSettings::~SavedSettings() {
        try {
            Settings::instance().evaluationDate() == evaluationDate_;
            Settings::instance().enforcesTodaysHistoricFixings() =
        } catch (...) {
            // nothing we can do except bailing out.


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