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/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
Copyright (C) 2003 RiskMap 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
<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.
*/
/*! \file curiouslyrecurring.hpp
\brief Curiously recurring template pattern
*/
#ifndef quantlib_curiously_recurring_h
#define quantlib_curiously_recurring_h
#include <ql/qldefines.hpp>
namespace QuantLib {
//! Support for the curiously recurring template pattern
/*! See James O. Coplien. A Curiously Recurring Template Pattern.
In Stanley B. Lippman, editor, C++ Gems, 135-144.
Cambridge University Press, New York, New York, 1996.
\ingroup patterns
*/
template <class Impl>
class CuriouslyRecurringTemplate {
protected:
// not meant to be instantiated as such
CuriouslyRecurringTemplate() {}
~CuriouslyRecurringTemplate() {}
// support for the curiously recurring template pattern
Impl& impl() {
return static_cast<Impl&>(*this);
}
const Impl& impl() const {
return static_cast<const Impl&>(*this);
}
};
}
#endif
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