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Subject: [Boost-commit] svn:boost r84206 - in trunk: boost/algorithm/cxx14 libs/algorithm/test
From: marshall_at_[hidden]
Date: 2013-05-09 13:22:47
Author: marshall
Date: 2013-05-09 13:22:46 EDT (Thu, 09 May 2013)
New Revision: 84206
URL: http://svn.boost.org/trac/boost/changeset/84206
Log:
Add C++14 extensions to 'equal' and 'mismatch'
Added:
trunk/boost/algorithm/cxx14/
trunk/boost/algorithm/cxx14/equal.hpp (contents, props changed)
trunk/boost/algorithm/cxx14/is_permutation.hpp (contents, props changed)
trunk/boost/algorithm/cxx14/mismatch.hpp (contents, props changed)
trunk/libs/algorithm/test/equal_test.cpp (contents, props changed)
trunk/libs/algorithm/test/mismatch_test.cpp (contents, props changed)
Text files modified:
trunk/libs/algorithm/test/Jamfile.v2 | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
Added: trunk/boost/algorithm/cxx14/equal.hpp
==============================================================================
--- (empty file)
+++ trunk/boost/algorithm/cxx14/equal.hpp 2013-05-09 13:22:46 EDT (Thu, 09 May 2013)
@@ -0,0 +1,97 @@
+/*
+ Copyright (c) Marshall Clow 2008-2012.
+
+ 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)
+*/
+
+/// \file equal.hpp
+/// \brief Test ranges to if they are equal
+/// \author Marshall Clow
+
+#ifndef BOOST_ALGORITHM_EQUAL_HPP
+#define BOOST_ALGORITHM_EQUAL_HPP
+
+#include <algorithm> // for std::equal
+#include <functional> // for std::equal_to
+
+namespace boost { namespace algorithm {
+
+namespace detail {
+
+ template <class T1, class T2>
+ struct eq : public std::binary_function<T1, T2, bool> {
+ bool operator () ( const T1& v1, const T2& v2 ) const { return v1 == v2 ;}
+ };
+
+ template <class RandomAccessIterator1, class RandomAccessIterator2, class BinaryPredicate>
+ bool equal ( RandomAccessIterator1 first1, RandomAccessIterator1 last1,
+ RandomAccessIterator2 first2, RandomAccessIterator2 last2, BinaryPredicate pred,
+ std::random_access_iterator_tag, std::random_access_iterator_tag )
+ {
+ // Random-access iterators let is check the sizes in constant time
+ if ( std::distance ( first1, last1 ) != std::distance ( first2, last2 ))
+ return false;
+ // If we know that the sequences are the same size, the original version is fine
+ return std::equal ( first1, last1, first2, pred );
+ }
+
+ template <class InputIterator1, class InputIterator2, class BinaryPredicate>
+ bool equal ( InputIterator1 first1, InputIterator1 last1,
+ InputIterator2 first2, InputIterator2 last2, BinaryPredicate pred,
+ std::input_iterator_tag, std::input_iterator_tag )
+ {
+ for (; first1 != last1 && first2 != last2; ++first1, ++first2 )
+ if ( !pred(*first1, *first2 ))
+ return false;
+
+ return first1 == last1 && first2 == last2;
+ }
+}
+
+/// \fn equal ( InputIterator1 first1, InputIterator1 last1,
+/// InputIterator2 first2, InputIterator2 last2,
+/// BinaryPredicate pred )
+/// \return true if all elements in the two ranges are equal
+///
+/// \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>
+bool equal ( InputIterator1 first1, InputIterator1 last1,
+ InputIterator2 first2, InputIterator2 last2, BinaryPredicate pred )
+{
+ return boost::algorithm::detail::equal (
+ first1, last1, first2, last2, pred,
+ typename std::iterator_traits<InputIterator1>::iterator_category (),
+ typename std::iterator_traits<InputIterator2>::iterator_category ());
+}
+
+/// \fn equal ( InputIterator1 first1, InputIterator1 last1,
+/// InputIterator2 first2, InputIterator2 last2 )
+/// \return true if all elements in the two ranges are equal
+///
+/// \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>
+bool equal ( InputIterator1 first1, InputIterator1 last1,
+ InputIterator2 first2, InputIterator2 last2 )
+{
+ return boost::algorithm::detail::equal (
+ first1, last1, first2, last2,
+ boost::algorithm::detail::eq<
+ typename std::iterator_traits<InputIterator1>::value_type,
+ typename std::iterator_traits<InputIterator2>::value_type> (),
+ typename std::iterator_traits<InputIterator1>::iterator_category (),
+ typename std::iterator_traits<InputIterator2>::iterator_category ());
+}
+
+// There are already range-based versions of these.
+
+}} // namespace boost and algorithm
+
+#endif // BOOST_ALGORITHM_EQUAL_HPP
Added: trunk/boost/algorithm/cxx14/is_permutation.hpp
==============================================================================
--- (empty file)
+++ trunk/boost/algorithm/cxx14/is_permutation.hpp 2013-05-09 13:22:46 EDT (Thu, 09 May 2013)
@@ -0,0 +1,130 @@
+/*
+ Copyright (c) Marshall Clow 2013
+
+ 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)
+*/
+
+/// \file equal.hpp
+/// \brief Determines if one
+/// \author Marshall Clow
+
+#ifndef BOOST_ALGORITHM_IS_PERMUTATION_HPP
+#define BOOST_ALGORITHM_IS_PERMUTATION_HPP
+
+#include <algorithm>
+#include <functional> // for std::equal_to
+
+namespace boost { namespace algorithm {
+
+namespace detail {
+
+ template <class T1, class T2>
+ struct is_perm_eq : public std::binary_function<T1, T2, bool> {
+ bool operator () ( const T1& v1, const T2& v2 ) const { return v1 == v2 ;}
+ };
+
+
+ template <class RandomAccessIterator1, class RandomAccessIterator2, class BinaryPredicate>
+ bool is_permutation ( RandomAccessIterator1 first1, RandomAccessIterator1 last1,
+ RandomAccessIterator2 first2, RandomAccessIterator2 last2, BinaryPredicate pred,
+ std::random_access_iterator_tag, std::random_access_iterator_tag )
+ {
+ // Random-access iterators let is check the sizes in constant time
+ if ( std::distance ( first1, last1 ) != std::distance ( first2, last2 ))
+ return false;
+ // If we know that the sequences are the same size, the original version is fine
+ return std::is_permutation ( first1, last1, first2, pred );
+ }
+
+
+ template<class ForwardIterator1, class ForwardIterator2, class BinaryPredicate>
+ bool is_permutation (
+ ForwardIterator1 first1, ForwardIterator1 last1,
+ ForwardIterator2 first2, ForwardIterator2 last2,
+ BinaryPredicate pred,
+ std::forward_iterator_tag, std::forward_iterator_tag )
+ {
+
+ // Look for common prefix
+ for (; first1 != last1 && first2 != last2; ++first1, ++first2)
+ if (!pred(*first1, *first2))
+ goto not_done;
+ // We've reached the end of one of the sequences without a mismatch.
+ return first1 == last1 && first2 == last2;
+ not_done:
+
+ // Check and make sure that we have the same # of elements left
+ typedef typename std::iterator_traits<ForwardIterator1>::difference_type diff1_t;
+ diff1_t len1 = _VSTD::distance(first1, last1);
+ typedef typename std::iterator_traits<ForwardIterator2>::difference_type diff2_t;
+ diff2_t len2 = _VSTD::distance(first2, last2);
+ if (len1 != len2)
+ return false;
+
+ // For each element in [f1, l1) see if there are the
+ // same number of equal elements in [f2, l2)
+ for ( ForwardIterator1 i = first1; i != last1; ++i )
+ {
+ // Have we already counted this value?
+ ForwardIterator1 j;
+ for ( j = first1; j != i; ++j )
+ if (pred(*j, *i))
+ break;
+ if ( j == i ) // didn't find it...
+ {
+ // Count number of *i in [f2, l2)
+ diff1_t c2 = 0;
+ for ( ForwardIterator2 iter2 = first2; iter2 != last2; ++iter2 )
+ if (pred(*i, *iter2))
+ ++c2;
+ if (c2 == 0)
+ return false;
+
+ // Count number of *i in [i, l1)
+ diff1_t c1 = 0;
+ for (_ForwardIterator1 iter1 = i; iter1 != last1; ++iter1 )
+ if (pred(*i, *iter1))
+ ++c1;
+ if (c1 != c2)
+ return false;
+ }
+ }
+ return true;
+ }
+
+}
+
+
+template<class ForwardIterator1, class ForwardIterator2, class BinaryPredicate>
+bool is_permutation (
+ ForwardIterator1 first1, ForwardIterator1 last1,
+ ForwardIterator2 first2, ForwardIterator2 last2,
+ BinaryPredicate pred )
+{
+ return boost::algorithm::detail::is_permutation (
+ first1, last1, first2, last2, pred,
+ typename std::iterator_traits<ForwardIterator1>::iterator_category (),
+ typename std::iterator_traits<ForwardIterator2>::iterator_category ());
+}
+
+template<class ForwardIterator1, class ForwardIterator2>
+bool is_permutation ( ForwardIterator1 first1, ForwardIterator1 last1,
+ ForwardIterator2 first2, ForwardIterator2 last2 )
+{
+ typedef typename iterator_traits<_ForwardIterator1>::value_type value1_t;
+ typedef typename iterator_traits<_ForwardIterator2>::value_type value2_t;
+ return boost::algorithm::detail::is_permutation (
+ first1, last1, first2, last2,
+ boost::algorithm::detail::is_perm_eq<
+ typename std::iterator_traits<InputIterator1>::value_type,
+ typename std::iterator_traits<InputIterator2>::value_type> (),
+ typename std::iterator_traits<ForwardIterator1>::iterator_category (),
+ typename std::iterator_traits<ForwardIterator2>::iterator_category ());
+}
+
+// There are already range-based versions of these.
+
+}} // namespace boost and algorithm
+
+#endif // BOOST_ALGORITHM_IS_PERMUTATION_HPP
Added: trunk/boost/algorithm/cxx14/mismatch.hpp
==============================================================================
--- (empty file)
+++ trunk/boost/algorithm/cxx14/mismatch.hpp 2013-05-09 13:22:46 EDT (Thu, 09 May 2013)
@@ -0,0 +1,66 @@
+/*
+ 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 {
+
+template <class InputIterator1, class InputIterator2, class BinaryPredicate>
+
+/// \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
+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
Modified: trunk/libs/algorithm/test/Jamfile.v2
==============================================================================
--- trunk/libs/algorithm/test/Jamfile.v2 (original)
+++ trunk/libs/algorithm/test/Jamfile.v2 2013-05-09 13:22:46 EDT (Thu, 09 May 2013)
@@ -47,6 +47,10 @@
[ run is_partitioned_test1.cpp unit_test_framework : : : : is_partitioned_test1 ]
[ run partition_copy_test1.cpp unit_test_framework : : : : partition_copy_test1 ]
+# Cxx14 tests
+ [ run equal_test.cpp unit_test_framework : : : : equal_test ]
+ [ run mismatch_test.cpp unit_test_framework : : : : mismatch_test ]
+
# Hex tests
[ run hex_test1.cpp unit_test_framework : : : : hex_test1 ]
[ run hex_test2.cpp unit_test_framework : : : : hex_test2 ]
Added: trunk/libs/algorithm/test/equal_test.cpp
==============================================================================
--- (empty file)
+++ trunk/libs/algorithm/test/equal_test.cpp 2013-05-09 13:22:46 EDT (Thu, 09 May 2013)
@@ -0,0 +1,126 @@
+/*
+ Copyright (c) Marshall Clow 2013.
+
+ 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)
+
+ For more information, see http://www.boost.org
+*/
+
+#include <boost/config.hpp>
+#include <boost/algorithm/cxx14/equal.hpp>
+
+#include "iterator_test.hpp"
+
+#define BOOST_TEST_MAIN
+#include <boost/test/unit_test.hpp>
+
+template <typename T>
+bool eq ( const T& a, const T& b ) { return a == b; }
+
+template <typename T>
+bool never_eq ( const T&, const T& ) { return false; }
+
+int comparison_count = 0;
+template <typename T>
+bool counting_equals ( const T &a, const T &b ) {
+ ++comparison_count;
+ return a == b;
+ }
+
+namespace ba = boost::algorithm;
+
+void test_equal ()
+{
+// Note: The literal values here are tested against directly, careful if you change them:
+ int num[] = { 1, 1, 2, 3, 5 };
+ const int sz = sizeof (num)/sizeof(num[0]);
+
+
+// Empty sequences are equal to each other, but not to non-empty sequences
+ BOOST_CHECK ( ba::equal ( input_iterator<int *>(num), input_iterator<int *>(num),
+ input_iterator<int *>(num), input_iterator<int *>(num)));
+ BOOST_CHECK ( ba::equal ( input_iterator<int *>(num), input_iterator<int *>(num),
+ input_iterator<int *>(num), input_iterator<int *>(num),
+ never_eq<int> ));
+ BOOST_CHECK ( ba::equal ( random_access_iterator<int *>(num), random_access_iterator<int *>(num),
+ random_access_iterator<int *>(num), random_access_iterator<int *>(num),
+ never_eq<int> ));
+
+ BOOST_CHECK (!ba::equal ( input_iterator<int *>(num), input_iterator<int *>(num),
+ input_iterator<int *>(num), input_iterator<int *>(num + 1)));
+ BOOST_CHECK (!ba::equal ( input_iterator<int *>(num + 1), input_iterator<int *>(num + 2),
+ input_iterator<int *>(num), input_iterator<int *>(num)));
+ BOOST_CHECK (!ba::equal ( random_access_iterator<int *>(num + 1), random_access_iterator<int *>(num + 2),
+ random_access_iterator<int *>(num), random_access_iterator<int *>(num)));
+
+// Single element sequences are equal if they contain the same value
+ BOOST_CHECK ( ba::equal ( input_iterator<int *>(num), input_iterator<int *>(num + 1),
+ input_iterator<int *>(num), input_iterator<int *>(num + 1)));
+ BOOST_CHECK ( ba::equal ( input_iterator<int *>(num), input_iterator<int *>(num + 1),
+ input_iterator<int *>(num), input_iterator<int *>(num + 1),
+ eq<int> ));
+ BOOST_CHECK ( ba::equal ( random_access_iterator<int *>(num), random_access_iterator<int *>(num + 1),
+ random_access_iterator<int *>(num), random_access_iterator<int *>(num + 1),
+ eq<int> ));
+ BOOST_CHECK (!ba::equal ( input_iterator<int *>(num), input_iterator<int *>(num + 1),
+ input_iterator<int *>(num), input_iterator<int *>(num + 1),
+ never_eq<int> ));
+ BOOST_CHECK (!ba::equal ( random_access_iterator<int *>(num), random_access_iterator<int *>(num + 1),
+ random_access_iterator<int *>(num), random_access_iterator<int *>(num + 1),
+ never_eq<int> ));
+
+ BOOST_CHECK ( ba::equal ( input_iterator<int *>(num), input_iterator<int *>(num + 1),
+ input_iterator<int *>(num + 1), input_iterator<int *>(num + 2)));
+ BOOST_CHECK ( ba::equal ( input_iterator<int *>(num), input_iterator<int *>(num + 1),
+ input_iterator<int *>(num + 1), input_iterator<int *>(num + 2),
+ eq<int> ));
+
+ BOOST_CHECK (!ba::equal ( input_iterator<int *>(num + 2), input_iterator<int *>(num + 3),
+ input_iterator<int *>(num), input_iterator<int *>(num + 1)));
+ BOOST_CHECK (!ba::equal ( input_iterator<int *>(num + 2), input_iterator<int *>(num + 3),
+ input_iterator<int *>(num), input_iterator<int *>(num + 1),
+ eq<int> ));
+
+// Identical long sequences are equal.
+ BOOST_CHECK ( ba::equal ( input_iterator<int *>(num), input_iterator<int *>(num + sz),
+ input_iterator<int *>(num), input_iterator<int *>(num + sz)));
+ BOOST_CHECK ( ba::equal ( input_iterator<int *>(num), input_iterator<int *>(num + sz),
+ input_iterator<int *>(num), input_iterator<int *>(num + sz),
+ eq<int> ));
+ BOOST_CHECK (!ba::equal ( input_iterator<int *>(num), input_iterator<int *>(num + sz),
+ input_iterator<int *>(num), input_iterator<int *>(num + sz),
+ never_eq<int> ));
+
+// different sequences are different
+ BOOST_CHECK (!ba::equal ( input_iterator<int *>(num + 1), input_iterator<int *>(num + sz),
+ input_iterator<int *>(num), input_iterator<int *>(num + sz)));
+ BOOST_CHECK (!ba::equal ( input_iterator<int *>(num + 1), input_iterator<int *>(num + sz),
+ input_iterator<int *>(num), input_iterator<int *>(num + sz),
+ eq<int> ));
+ BOOST_CHECK (!ba::equal ( input_iterator<int *>(num), input_iterator<int *>(num + sz),
+ input_iterator<int *>(num), input_iterator<int *>(num + sz - 1)));
+ BOOST_CHECK (!ba::equal ( input_iterator<int *>(num), input_iterator<int *>(num + sz),
+ input_iterator<int *>(num), input_iterator<int *>(num + sz - 1),
+ eq<int> ));
+
+// When there's a cheap check, bail early
+ comparison_count = 0;
+ BOOST_CHECK (!ba::equal ( random_access_iterator<int *>(num), random_access_iterator<int *>(num + sz),
+ random_access_iterator<int *>(num), random_access_iterator<int *>(num + sz - 1),
+ counting_equals<int> ));
+ BOOST_CHECK ( comparison_count == 0 );
+// And when there's not, we can't
+ comparison_count = 0;
+ BOOST_CHECK (!ba::equal ( input_iterator<int *>(num), input_iterator<int *>(num + sz),
+ input_iterator<int *>(num), input_iterator<int *>(num + sz - 1),
+ counting_equals<int> ));
+ BOOST_CHECK ( comparison_count > 0 );
+
+}
+
+
+BOOST_AUTO_TEST_CASE( test_main )
+{
+ test_equal ();
+}
Added: trunk/libs/algorithm/test/mismatch_test.cpp
==============================================================================
--- (empty file)
+++ trunk/libs/algorithm/test/mismatch_test.cpp 2013-05-09 13:22:46 EDT (Thu, 09 May 2013)
@@ -0,0 +1,162 @@
+/*
+ Copyright (c) Marshall Clow 2013.
+
+ 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)
+
+ For more information, see http://www.boost.org
+*/
+
+#include <boost/config.hpp>
+#include <boost/algorithm/cxx14/mismatch.hpp>
+
+#include "iterator_test.hpp"
+
+#define BOOST_TEST_MAIN
+#include <boost/test/unit_test.hpp>
+
+template <typename T>
+bool eq ( const T& a, const T& b ) { return a == b; }
+
+template <typename T>
+bool never_eq ( const T&, const T& ) { return false; }
+
+namespace ba = boost::algorithm;
+
+template <typename Iter1, typename Iter2>
+bool iter_eq ( std::pair<Iter1, Iter1> pr, Iter1 first, Iter2 second ) {
+ return pr.first == first && pr.second == second;
+ }
+
+void test_mismatch ()
+{
+// Note: The literal values here are tested against directly, careful if you change them:
+ int num[] = { 1, 1, 2, 3, 5 };
+ const int sz = sizeof (num)/sizeof(num[0]);
+
+
+// No mismatch for empty sequences
+ BOOST_CHECK ( iter_eq (
+ ba::mismatch ( input_iterator<int *>(num), input_iterator<int *>(num),
+ input_iterator<int *>(num), input_iterator<int *>(num)),
+ input_iterator<int *>(num), input_iterator<int *>(num)));
+ BOOST_CHECK ( iter_eq (
+ ba::mismatch ( input_iterator<int *>(num), input_iterator<int *>(num),
+ input_iterator<int *>(num), input_iterator<int *>(num),
+ never_eq<int> ),
+ input_iterator<int *>(num), input_iterator<int *>(num)));
+
+ BOOST_CHECK ( iter_eq (
+ ba::mismatch ( random_access_iterator<int *>(num), random_access_iterator<int *>(num),
+ random_access_iterator<int *>(num), random_access_iterator<int *>(num),
+ never_eq<int> ),
+ random_access_iterator<int *>(num), random_access_iterator<int *>(num)));
+
+// Empty vs. non-empty mismatch immediately
+ BOOST_CHECK ( iter_eq (
+ ba::mismatch ( input_iterator<int *>(num), input_iterator<int *>(num),
+ input_iterator<int *>(num), input_iterator<int *>(num + 1)),
+ input_iterator<int *>(num), input_iterator<int *>(num)));
+
+ BOOST_CHECK ( iter_eq (
+ ba::mismatch ( input_iterator<int *>(num + 1), input_iterator<int *>(num + 2),
+ input_iterator<int *>(num), input_iterator<int *>(num)),
+ input_iterator<int *>(num + 1), input_iterator<int *>(num)));
+
+ BOOST_CHECK ( iter_eq (
+ ba::mismatch ( random_access_iterator<int *>(num + 1), random_access_iterator<int *>(num + 2),
+ random_access_iterator<int *>(num), random_access_iterator<int *>(num)),
+ random_access_iterator<int *>(num + 1), random_access_iterator<int *>(num)));
+
+// Single element sequences are equal if they contain the same value
+ BOOST_CHECK ( iter_eq (
+ ba::mismatch ( input_iterator<int *>(num), input_iterator<int *>(num + 1),
+ input_iterator<int *>(num), input_iterator<int *>(num + 1)),
+ input_iterator<int *>(num + 1), input_iterator<int *>(num + 1)));
+
+ BOOST_CHECK ( iter_eq (
+ ba::mismatch ( input_iterator<int *>(num), input_iterator<int *>(num + 1),
+ input_iterator<int *>(num), input_iterator<int *>(num + 1),
+ eq<int> ),
+ input_iterator<int *>(num + 1), input_iterator<int *>(num + 1)));
+
+ BOOST_CHECK ( iter_eq (
+ ba::mismatch ( random_access_iterator<int *>(num), random_access_iterator<int *>(num + 1),
+ random_access_iterator<int *>(num), random_access_iterator<int *>(num + 1),
+ eq<int> ),
+ random_access_iterator<int *>(num + 1), random_access_iterator<int *>(num + 1)));
+
+
+ BOOST_CHECK ( iter_eq (
+ ba::mismatch ( input_iterator<int *>(num), input_iterator<int *>(num + 1),
+ input_iterator<int *>(num), input_iterator<int *>(num + 1),
+ never_eq<int> ),
+ input_iterator<int *>(num), input_iterator<int *>(num)));
+
+ BOOST_CHECK ( iter_eq (
+ ba::mismatch ( random_access_iterator<int *>(num), random_access_iterator<int *>(num + 1),
+ random_access_iterator<int *>(num), random_access_iterator<int *>(num + 1),
+ never_eq<int> ),
+ random_access_iterator<int *>(num), random_access_iterator<int *>(num)));
+
+ BOOST_CHECK ( iter_eq (
+ ba::mismatch ( input_iterator<int *>(num), input_iterator<int *>(num + 1),
+ input_iterator<int *>(num + 1), input_iterator<int *>(num + 2)),
+ input_iterator<int *>(num + 1), input_iterator<int *>(num + 2)));
+
+ BOOST_CHECK ( iter_eq (
+ ba::mismatch ( input_iterator<int *>(num), input_iterator<int *>(num + 1),
+ input_iterator<int *>(num + 1), input_iterator<int *>(num + 2),
+ eq<int> ),
+ input_iterator<int *>(num + 1), input_iterator<int *>(num + 2)));
+
+ BOOST_CHECK ( iter_eq (
+ ba::mismatch ( input_iterator<int *>(num + 2), input_iterator<int *>(num + 3),
+ input_iterator<int *>(num), input_iterator<int *>(num + 1)),
+ input_iterator<int *>(num + 2), input_iterator<int *>(num)));
+
+ BOOST_CHECK ( iter_eq (
+ ba::mismatch ( input_iterator<int *>(num + 2), input_iterator<int *>(num + 3),
+ input_iterator<int *>(num), input_iterator<int *>(num + 1),
+ eq<int> ),
+ input_iterator<int *>(num + 2), input_iterator<int *>(num)));
+
+
+
+// Identical long sequences are equal.
+ BOOST_CHECK ( iter_eq (
+ ba::mismatch ( input_iterator<int *>(num), input_iterator<int *>(num + sz),
+ input_iterator<int *>(num), input_iterator<int *>(num + sz)),
+ input_iterator<int *>(num + sz), input_iterator<int *>(num + sz)));
+
+ BOOST_CHECK ( iter_eq (
+ ba::mismatch ( input_iterator<int *>(num), input_iterator<int *>(num + sz),
+ input_iterator<int *>(num), input_iterator<int *>(num + sz),
+ eq<int> ),
+ input_iterator<int *>(num + sz), input_iterator<int *>(num + sz)));
+
+ BOOST_CHECK ( iter_eq (
+ ba::mismatch ( input_iterator<int *>(num), input_iterator<int *>(num + sz),
+ input_iterator<int *>(num), input_iterator<int *>(num + sz),
+ never_eq<int> ),
+ input_iterator<int *>(num), input_iterator<int *>(num)));
+
+// different sequences are different
+ BOOST_CHECK ( iter_eq (
+ ba::mismatch ( input_iterator<int *>(num + 1), input_iterator<int *>(num + sz),
+ input_iterator<int *>(num), input_iterator<int *>(num + sz)),
+ input_iterator<int *>(num + 2), input_iterator<int *>(num + 1)));
+
+ BOOST_CHECK ( iter_eq (
+ ba::mismatch ( input_iterator<int *>(num + 1), input_iterator<int *>(num + sz),
+ input_iterator<int *>(num), input_iterator<int *>(num + sz),
+ eq<int> ),
+ input_iterator<int *>(num + 2), input_iterator<int *>(num + 1)));
+
+}
+
+
+BOOST_AUTO_TEST_CASE( test_main )
+{
+ test_mismatch ();
+}
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