zeroyieldstructure.hpp

/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 
/*
 Copyright (C) 2000, 2001, 2002, 2003 RiskMap srl
 Copyright (C) 2003, 2004 StatPro Italia srl
 Copyright (C) 2009 Ferdinando Ametrano
 
 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_zero_yield_structure_hpp
#define quantlib_zero_yield_structure_hpp
 
#include <ql/termstructures/yieldtermstructure.hpp>
 
namespace QuantLib {
 
 
    class ZeroYieldStructure : public YieldTermStructure {
      public:
        explicit ZeroYieldStructure(
            const DayCounter& dc = DayCounter());
        explicit ZeroYieldStructure(
            const Date& referenceDate,
            const Calendar& calendar = Calendar(),
            const DayCounter& dc = DayCounter(),
            const std::vector<Handle<Quote> >& jumps = {},
            const std::vector<Date>& jumpDates = {});
        ZeroYieldStructure(
            Natural settlementDays,
            const Calendar& calendar,
            const DayCounter& dc = DayCounter(),
            const std::vector<Handle<Quote> >& jumps = {},
            const std::vector<Date>& jumpDates = {});
      protected:
        virtual Rate zeroYieldImpl(Time) const = 0;
 
 
 
        DiscountFactor discountImpl(Time) const override;
    };
 
    // inline definitions
 
    inline DiscountFactor ZeroYieldStructure::discountImpl(Time t) const {
        if (t == 0.0)     // this acts as a safe guard in cases where
            return 1.0;   // zeroYieldImpl(0.0) would throw.
 
        Rate r = zeroYieldImpl(t);
        return DiscountFactor(std::exp(-r*t));
    }
 
}
 
#endif