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/*
Copyright (C) 2000, 2001, 2002 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 ferdinando@ametrano.net
The license is also available online at http://quantlib.org/html/license.html
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 iteratorcategories.hpp
\brief Lowest common denominator between two iterator categories
\fullpath
ql/Utilities/%iteratorcategories.hpp
*/
// $Id: iteratorcategories.hpp,v 1.5 2002/01/16 14:40:56 nando Exp $
#ifndef quantlib_iterator_categories_h
#define quantlib_iterator_categories_h
#include <iterator>
namespace QuantLib {
//! Classes and functions of general utility
/*! See sect. \ref utilities */
namespace Utilities {
//! most generic of two given iterator categories
/*! Specializations of this struct define a typedef iterator_category
which corresponds to the most generic of the two input
categories, e.g.,
lowest_category_iterator<std::random_access_iterator_tag,
std::forward_iterator_tag>::iterator_category corresponds to
std::forward_iterator_tag.
*/
template <class Category1, class Category2>
struct lowest_category_iterator {};
#if !defined(__DOXYGEN__)
template <>
struct lowest_category_iterator<
std::random_access_iterator_tag,
std::random_access_iterator_tag> {
typedef std::random_access_iterator_tag iterator_category;
};
template <>
struct lowest_category_iterator<
std::random_access_iterator_tag,
std::bidirectional_iterator_tag> {
typedef std::bidirectional_iterator_tag iterator_category;
};
template <>
struct lowest_category_iterator<
std::random_access_iterator_tag,
std::forward_iterator_tag> {
typedef std::forward_iterator_tag iterator_category;
};
template <>
struct lowest_category_iterator<
std::random_access_iterator_tag,
std::input_iterator_tag> {
typedef std::input_iterator_tag iterator_category;
};
template <>
struct lowest_category_iterator<
std::random_access_iterator_tag,
std::output_iterator_tag> {
typedef std::output_iterator_tag iterator_category;
};
template <>
struct lowest_category_iterator<
std::bidirectional_iterator_tag,
std::random_access_iterator_tag> {
typedef std::bidirectional_iterator_tag iterator_category;
};
template <>
struct lowest_category_iterator<
std::bidirectional_iterator_tag,
std::bidirectional_iterator_tag> {
typedef std::bidirectional_iterator_tag iterator_category;
};
template <>
struct lowest_category_iterator<
std::bidirectional_iterator_tag,
std::forward_iterator_tag> {
typedef std::forward_iterator_tag iterator_category;
};
template <>
struct lowest_category_iterator<
std::bidirectional_iterator_tag,
std::input_iterator_tag> {
typedef std::input_iterator_tag iterator_category;
};
template <>
struct lowest_category_iterator<
std::bidirectional_iterator_tag,
std::output_iterator_tag> {
typedef std::output_iterator_tag iterator_category;
};
template <>
struct lowest_category_iterator<
std::forward_iterator_tag,
std::random_access_iterator_tag> {
typedef std::forward_iterator_tag iterator_category;
};
template <>
struct lowest_category_iterator<
std::forward_iterator_tag,
std::bidirectional_iterator_tag> {
typedef std::forward_iterator_tag iterator_category;
};
template <>
struct lowest_category_iterator<
std::forward_iterator_tag,
std::forward_iterator_tag> {
typedef std::forward_iterator_tag iterator_category;
};
template <>
struct lowest_category_iterator<
std::forward_iterator_tag,
std::input_iterator_tag> {
typedef std::input_iterator_tag iterator_category;
};
template <>
struct lowest_category_iterator<
std::forward_iterator_tag,
std::output_iterator_tag> {
typedef std::output_iterator_tag iterator_category;
};
template <>
struct lowest_category_iterator<
std::input_iterator_tag,
std::random_access_iterator_tag> {
typedef std::input_iterator_tag iterator_category;
};
template <>
struct lowest_category_iterator<
std::input_iterator_tag,
std::bidirectional_iterator_tag> {
typedef std::input_iterator_tag iterator_category;
};
template <>
struct lowest_category_iterator<
std::input_iterator_tag,
std::forward_iterator_tag> {
typedef std::input_iterator_tag iterator_category;
};
template <>
struct lowest_category_iterator<
std::input_iterator_tag,
std::input_iterator_tag> {
typedef std::input_iterator_tag iterator_category;
};
template <>
struct lowest_category_iterator<
std::input_iterator_tag,
std::output_iterator_tag> {
typedef void iterator_category;
};
template <>
struct lowest_category_iterator<
std::output_iterator_tag,
std::random_access_iterator_tag> {
typedef std::output_iterator_tag iterator_category;
};
template <>
struct lowest_category_iterator<
std::output_iterator_tag,
std::bidirectional_iterator_tag> {
typedef std::output_iterator_tag iterator_category;
};
template <>
struct lowest_category_iterator<
std::output_iterator_tag,
std::forward_iterator_tag> {
typedef std::output_iterator_tag iterator_category;
};
template <>
struct lowest_category_iterator<
std::output_iterator_tag,
std::input_iterator_tag> {
typedef void iterator_category;
};
template <>
struct lowest_category_iterator<
std::output_iterator_tag,
std::output_iterator_tag> {
typedef std::output_iterator_tag iterator_category;
};
#endif
}
}
#endif
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