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Diffstat (limited to 'boost/algorithm/cxx14/mismatch.hpp')
-rw-r--r-- | boost/algorithm/cxx14/mismatch.hpp | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/boost/algorithm/cxx14/mismatch.hpp b/boost/algorithm/cxx14/mismatch.hpp new file mode 100644 index 0000000000..926ab1944b --- /dev/null +++ b/boost/algorithm/cxx14/mismatch.hpp @@ -0,0 +1,65 @@ +/* + Copyright (c) Marshall Clow 2008-2012. + + Distributed under the Boost Software License, Version 1.0. (See accompanying + file LICENSE10.txt or copy at http://www.boost.org/LICENSE10.txt) +*/ + +/// \file mismatch.hpp +/// \brief Find the first mismatched element in a sequence +/// \author Marshall Clow + +#ifndef BOOST_ALGORITHM_MISMATCH_HPP +#define BOOST_ALGORITHM_MISMATCH_HPP + +#include <algorithm> // for std::mismatch +#include <utility> // for std::pair + +namespace boost { namespace algorithm { + +/// \fn mismatch ( InputIterator1 first1, InputIterator1 last1, +/// InputIterator2 first2, InputIterator2 last2, +/// BinaryPredicate pred ) +/// \return a pair of iterators pointing to the first elements in the sequence that do not match +/// +/// \param first1 The start of the first range. +/// \param last1 One past the end of the first range. +/// \param first2 The start of the second range. +/// \param last2 One past the end of the second range. +/// \param pred A predicate for comparing the elements of the ranges +template <class InputIterator1, class InputIterator2, class BinaryPredicate> +std::pair<InputIterator1, InputIterator2> mismatch ( + InputIterator1 first1, InputIterator1 last1, + InputIterator2 first2, InputIterator2 last2, + BinaryPredicate pred ) +{ + for (; first1 != last1 && first2 != last2; ++first1, ++first2) + if ( !pred ( *first1, *first2 )) + break; + return std::pair<InputIterator1, InputIterator2>(first1, first2); +} + +/// \fn mismatch ( InputIterator1 first1, InputIterator1 last1, +/// InputIterator2 first2, InputIterator2 last2 ) +/// \return a pair of iterators pointing to the first elements in the sequence that do not match +/// +/// \param first1 The start of the first range. +/// \param last1 One past the end of the first range. +/// \param first2 The start of the second range. +/// \param last2 One past the end of the second range. +template <class InputIterator1, class InputIterator2> +std::pair<InputIterator1, InputIterator2> mismatch ( + InputIterator1 first1, InputIterator1 last1, + InputIterator2 first2, InputIterator2 last2 ) +{ + for (; first1 != last1 && first2 != last2; ++first1, ++first2) + if ( *first1 != *first2 ) + break; + return std::pair<InputIterator1, InputIterator2>(first1, first2); +} + +// There are already range-based versions of these. + +}} // namespace boost and algorithm + +#endif // BOOST_ALGORITHM_MISMATCH_HPP |