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/*
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