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## Function template is_permutation

boost::algorithm::is_permutation — Tests to see if the sequence [first,last) is a permutation of the sequence starting at first2.

## Synopsis

    // In header: <boost/algorithm/cxx14/is_permutation.hpp>

    template<typename ForwardIterator1, typename ForwardIterator2>
      bool is_permutation(ForwardIterator1 first1, ForwardIterator1 last1,
                          ForwardIterator2 first2, ForwardIterator2 last2);

## Description

| Note
This function is part of the C++2014 standard library. We will use the standard one if it is available, otherwise we have our own implementation.

Parameters: |
`first1` | The start of the input sequence
`first2` | The start of the second sequence
`last1` | One past the end of the second sequence
`last2` | One past the end of the input sequence