iborcoupon.hpp

/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 
/*
 Copyright (C) 2007, 2011 Ferdinando Ametrano
 Copyright (C) 2007 Giorgio Facchinetti
 Copyright (C) 2007 Cristina Duminuco
 Copyright (C) 2007 StatPro Italia srl
 Copyright (C) 2017 Joseph Jeisman
 Copyright (C) 2017 Fabrice Lecuyer
 
 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
 <http://quantlib.org/license.shtml>.
 
 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.
*/
 
#ifndef quantlib_ibor_coupon_hpp
#define quantlib_ibor_coupon_hpp
 
#include <ql/cashflows/floatingratecoupon.hpp>
#include <ql/indexes/iborindex.hpp>
#include <ql/patterns/singleton.hpp>
#include <ql/time/schedule.hpp>
#include <ql/optional.hpp>
 
namespace QuantLib {
 
    class IborCoupon : public FloatingRateCoupon {
      public:
        IborCoupon(const Date& paymentDate,
                   Real nominal,
                   const Date& startDate,
                   const Date& endDate,
                   Natural fixingDays,
                   const ext::shared_ptr<IborIndex>& index,
                   Real gearing = 1.0,
                   Spread spread = 0.0,
                   const Date& refPeriodStart = Date(),
                   const Date& refPeriodEnd = Date(),
                   const DayCounter& dayCounter = DayCounter(),
                   bool isInArrears = false,
                   const Date& exCouponDate = Date());
 
        const ext::shared_ptr<IborIndex>& iborIndex() const { return iborIndex_; }
 
        // implemented in order to manage the case of par coupon
        Rate indexFixing() const override;
        void setPricer(const ext::shared_ptr<FloatingRateCouponPricer>&) override;
 
        void accept(AcyclicVisitor&) override;
 
        const Date& fixingValueDate() const;
        const Date& fixingMaturityDate() const;
 
        const Date& fixingEndDate() const;
        Time spanningTimeIndexMaturity() const;
 
        Time spanningTime() const;
 
      private:
        friend class IborCouponPricer;
        ext::shared_ptr<IborIndex> iborIndex_;
        Date fixingDate_;
        // computed by coupon pricer (depending on par coupon flag) and stored here
        void initializeCachedData() const;
        mutable bool cachedDataIsInitialized_ = false;
        mutable Date fixingValueDate_, fixingEndDate_, fixingMaturityDate_;
        mutable Time spanningTime_, spanningTimeIndexMaturity_;
 
      public:
        // IborCoupon::Settings forward declaration
        class Settings;
    };
 
 
    class IborCoupon::Settings : public Singleton<IborCoupon::Settings> {
        friend class Singleton<IborCoupon::Settings>;
      private:
        Settings() = default;
 
      public:
        void createAtParCoupons();
 
        void createIndexedCoupons();
 
        bool usingAtParCoupons() const;
 
      private:
        #ifndef QL_USE_INDEXED_COUPON
        bool usingAtParCoupons_ = true;
        #else
        bool usingAtParCoupons_ = false;
        #endif
    };
 
    class IborLeg {
      public:
        IborLeg(Schedule schedule, ext::shared_ptr<IborIndex> index);
        IborLeg& withNotionals(Real notional);
        IborLeg& withNotionals(const std::vector<Real>& notionals);
        IborLeg& withPaymentDayCounter(const DayCounter&);
        IborLeg& withPaymentAdjustment(BusinessDayConvention);
        IborLeg& withPaymentLag(Natural lag);
        IborLeg& withPaymentCalendar(const Calendar&);
        IborLeg& withFixingDays(Natural fixingDays);
        IborLeg& withFixingDays(const std::vector<Natural>& fixingDays);
        IborLeg& withGearings(Real gearing);
        IborLeg& withGearings(const std::vector<Real>& gearings);
        IborLeg& withSpreads(Spread spread);
        IborLeg& withSpreads(const std::vector<Spread>& spreads);
        IborLeg& withCaps(Rate cap);
        IborLeg& withCaps(const std::vector<Rate>& caps);
        IborLeg& withFloors(Rate floor);
        IborLeg& withFloors(const std::vector<Rate>& floors);
        IborLeg& inArrears(bool flag = true);
        IborLeg& withZeroPayments(bool flag = true);
        IborLeg& withExCouponPeriod(const Period&,
                                    const Calendar&,
                                    BusinessDayConvention,
                                    bool endOfMonth = false);
        IborLeg& withIndexedCoupons(ext::optional<bool> b = true);
        IborLeg& withAtParCoupons(bool b = true);
        operator Leg() const;
 
      private:
        Schedule schedule_;
        ext::shared_ptr<IborIndex> index_;
        std::vector<Real> notionals_;
        DayCounter paymentDayCounter_;
        BusinessDayConvention paymentAdjustment_ = Following;
        Natural paymentLag_ = 0;
        Calendar paymentCalendar_;
        std::vector<Natural> fixingDays_;
        std::vector<Real> gearings_;
        std::vector<Spread> spreads_;
        std::vector<Rate> caps_, floors_;
        bool inArrears_ = false, zeroPayments_ = false;
        Period exCouponPeriod_;
        Calendar exCouponCalendar_;
        BusinessDayConvention exCouponAdjustment_ = Unadjusted;
        bool exCouponEndOfMonth_ = false;
        ext::optional<bool> useIndexedCoupons_;
    };
 
}
 
#endif