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Editing: find_backward.hpp
/* Copyright (c) T. Zachary Laine 2018. Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) */ #ifndef BOOST_ALGORITHM_FIND_BACKWARD_HPP #define BOOST_ALGORITHM_FIND_BACKWARD_HPP #include <utility> #include <boost/config.hpp> #include <boost/range/begin.hpp> #include <boost/range/end.hpp> namespace boost { namespace algorithm { template<typename BidiIter, typename T> BOOST_CXX14_CONSTEXPR BidiIter find_backward(BidiIter first, BidiIter last, const T & x) { BidiIter it = last; while (it != first) { if (*--it == x) return it; } return last; } template<typename Range, typename T> BOOST_CXX14_CONSTEXPR typename boost::range_iterator<Range>::type find_backward(Range & range, const T & x) { return ::boost::algorithm::find_backward(boost::begin(range), boost::end(range), x); } template<typename BidiIter, typename T> BOOST_CXX14_CONSTEXPR BidiIter find_not_backward(BidiIter first, BidiIter last, const T & x) { BidiIter it = last; while (it != first) { if (*--it != x) return it; } return last; } template<typename Range, typename T> BOOST_CXX14_CONSTEXPR typename boost::range_iterator<Range>::type find_not_backward(Range & range, const T & x) { return ::boost::algorithm::find_not_backward(boost::begin(range), boost::end(range), x); } template<typename BidiIter, typename Pred> BOOST_CXX14_CONSTEXPR BidiIter find_if_backward(BidiIter first, BidiIter last, Pred p) { BidiIter it = last; while (it != first) { if (p(*--it)) return it; } return last; } template<typename Range, typename Pred> BOOST_CXX14_CONSTEXPR typename boost::range_iterator<Range>::type find_if_backward(Range & range, Pred p) { return ::boost::algorithm::find_if_backward(boost::begin(range), boost::end(range), p); } template<typename BidiIter, typename Pred> BOOST_CXX14_CONSTEXPR BidiIter find_if_not_backward(BidiIter first, BidiIter last, Pred p) { BidiIter it = last; while (it != first) { if (!p(*--it)) return it; } return last; } template<typename Range, typename Pred> BOOST_CXX14_CONSTEXPR typename boost::range_iterator<Range>::type find_if_not_backward(Range & range, Pred p) { return ::boost::algorithm::find_if_not_backward(boost::begin(range), boost::end(range), p); } }} // namespace boost and algorithm #endif // BOOST_ALGORITHM_FIND_BACKWARD_HPP
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