boost update (boost: 1.55.0 gcc: 4.7.3)

include/boost/algorithm/cxx11/copy_if.hpp

@@ -63,33 +63,34 @@ OutputIterator copy_if ( const Range &r, OutputIterator result, Predicate p )
 /// \fn copy_while ( InputIterator first, InputIterator last, OutputIterator result, Predicate p )
 /// \brief Copies all the elements at the start of the input range that
 ///     satisfy the predicate to the output range.
-/// \return The updated output iterator
+/// \return The updated input and output iterators
 /// 
 /// \param first    The start of the input sequence
 /// \param last     One past the end of the input sequence
 /// \param result   An output iterator to write the results into
 /// \param p        A predicate for testing the elements of the range
 ///
 template<typename InputIterator, typename OutputIterator, typename Predicate> 
-OutputIterator copy_while ( InputIterator first, InputIterator last, 
-                                OutputIterator result, Predicate p )
+std::pair<InputIterator, OutputIterator>
+copy_while ( InputIterator first, InputIterator last, OutputIterator result, Predicate p )
 {
     for ( ; first != last && p(*first); ++first )
         *result++ = *first;
-    return result;
+    return std::make_pair(first, result);
 }
 
 /// \fn copy_while ( const Range &r, OutputIterator result, Predicate p )
 /// \brief Copies all the elements at the start of the input range that
 ///     satisfy the predicate to the output range.
-/// \return The updated output iterator
+/// \return The updated input and output iterators
 /// 
 /// \param r        The input range
 /// \param result   An output iterator to write the results into
 /// \param p        A predicate for testing the elements of the range
 ///
 template<typename Range, typename OutputIterator, typename Predicate>
-OutputIterator copy_while ( const Range &r, OutputIterator result, Predicate p )
+std::pair<typename boost::range_iterator<const Range>::type, OutputIterator> 
+copy_while ( const Range &r, OutputIterator result, Predicate p )
 {
     return boost::algorithm::copy_while (boost::begin (r), boost::end(r), result, p);
 }
@@ -106,11 +107,12 @@ OutputIterator copy_while ( const Range &r, OutputIterator result, Predicate p )
 /// \param p        A predicate for testing the elements of the range
 ///
 template<typename InputIterator, typename OutputIterator, typename Predicate> 
-OutputIterator copy_until ( InputIterator first, InputIterator last, OutputIterator result, Predicate p )
+std::pair<InputIterator, OutputIterator>
+copy_until ( InputIterator first, InputIterator last, OutputIterator result, Predicate p )
 {
     for ( ; first != last && !p(*first); ++first )
         *result++ = *first;
-    return result;
+    return std::make_pair(first, result);
 }
 
 /// \fn copy_until ( const Range &r, OutputIterator result, Predicate p )
@@ -123,7 +125,8 @@ OutputIterator copy_until ( InputIterator first, InputIterator last, OutputItera
 /// \param p        A predicate for testing the elements of the range
 ///
 template<typename Range, typename OutputIterator, typename Predicate>
-OutputIterator copy_until ( const Range &r, OutputIterator result, Predicate p )
+std::pair<typename boost::range_iterator<const Range>::type, OutputIterator> 
+copy_until ( const Range &r, OutputIterator result, Predicate p )
 {
     return boost::algorithm::copy_until (boost::begin (r), boost::end(r), result, p);
 }

include/boost/algorithm/cxx11/is_permutation.hpp

@@ -25,10 +25,6 @@
 
 namespace boost { namespace algorithm {
 
-#if __cplusplus >= 201103L
-//  Use the C++11 versions of is_permutation if it is available
-using std::is_permutation;              // Section 25.2.12
-#else
 /// \cond DOXYGEN_HIDE
 namespace detail {
     template <typename Predicate, typename Iterator>
@@ -38,18 +34,82 @@ namespace detail {
         template <typename T1>
         bool operator () ( const T1 &t1 ) const { return p_ ( *it_, t1 ); }
     private:
-        Predicate &p_;
+        Predicate p_;
         Iterator it_;
         };
+
+//  Preconditions:
+//  1. The sequences are the same length
+//  2. Any common elements on the front have been removed (not necessary for correctness, just for performance)
+    template< class ForwardIterator1, class ForwardIterator2, class BinaryPredicate >
+    bool is_permutation_inner ( ForwardIterator1 first1, ForwardIterator1 last1,
+                                ForwardIterator2 first2, ForwardIterator2 last2,
+                                BinaryPredicate p ) {
+        //  for each unique value in the sequence [first1,last1), count how many times
+        //  it occurs, and make sure it occurs the same number of times in [first2, last2)
+            for ( ForwardIterator1 iter = first1; iter != last1; ++iter ) {
+                value_predicate<BinaryPredicate, ForwardIterator1> pred ( p, iter );
+
+            /*  For each value we haven't seen yet... */
+                if ( std::find_if ( first1, iter, pred ) == iter ) {
+                    std::size_t dest_count = std::count_if ( first2, last2, pred );
+                    if ( dest_count == 0 || dest_count != (std::size_t) std::count_if ( iter, last1, pred ))
+                        return false;
+                    }
+                }
+
+        return true;
+        }                      
+
+    template< class ForwardIterator1, class ForwardIterator2, class BinaryPredicate>
+    bool is_permutation_tag ( ForwardIterator1 first1, ForwardIterator1 last1, 
+                          ForwardIterator2 first2, ForwardIterator2 last2, 
+                          BinaryPredicate p,
+                          std::forward_iterator_tag, std::forward_iterator_tag ) {
+
+    //  Skip the common prefix (if any)
+        while ( first1 != last1 && first2 != last2 && p ( *first1, *first2 )) {
+            ++first1;
+            ++first2;
+            }
+        if ( first1 != last1 && first2 != last2 )
+            return boost::algorithm::detail::is_permutation_inner ( first1, last1, first2, last2,
+                std::equal_to<typename std::iterator_traits<ForwardIterator1>::value_type> ());
+        return first1 == last1 && first2 == last2;
+        }
+
+    template <class RandomAccessIterator1, class RandomAccessIterator2, class BinaryPredicate>
+    bool is_permutation_tag ( RandomAccessIterator1 first1, RandomAccessIterator1 last1, 
+                          RandomAccessIterator2 first2, RandomAccessIterator2 last2, 
+                          BinaryPredicate p,
+                          std::random_access_iterator_tag, std::random_access_iterator_tag ) {
+    //  Cheap check
+        if ( std::distance ( first1, last1 ) != std::distance ( first2, last2 ))
+            return false;
+    //  Skip the common prefix (if any)
+        while ( first1 != last1 && first2 != last2 && p ( *first1, *first2 )) {
+            ++first1;
+            ++first2;
+            }
+
+        if ( first1 != last1 && first2 != last2 )
+            return is_permutation_inner (first1, last1, first2, last2, p);
+        return first1 == last1 && first2 == last2;
+        }
+
 }
 /// \endcond
 
+#if __cplusplus >= 201103L
+//  Use the C++11 versions of is_permutation if it is available
+using std::is_permutation;              // Section 25.2.12
+#else
 
 /// \fn is_permutation ( ForwardIterator1 first, ForwardIterator1 last, ForwardIterator2 first2, BinaryPredicate p )
 /// \brief Tests to see if the sequence [first,last) is a permutation of the sequence starting at first2
 ///
-/// \param first    The start of the input sequence
-/// \param last     One past the end of the input sequence
+/// \param first1   The start of the input sequence
+/// \param last1    One past the end of the input sequence
 /// \param first2   The start of the second sequence
 /// \param p        The predicate to compare elements with
 ///
@@ -69,19 +129,7 @@ bool is_permutation ( ForwardIterator1 first1, ForwardIterator1 last1,
     //  Create last2
         ForwardIterator2 last2 = first2;
         std::advance ( last2, std::distance (first1, last1));
-
-    //  for each unique value in the sequence [first1,last1), count how many times
-    //  it occurs, and make sure it occurs the same number of times in [first2, last2)
-        for ( ForwardIterator1 iter = first1; iter != last1; ++iter ) {
-            detail::value_predicate<BinaryPredicate, ForwardIterator1> pred ( p, iter );
-
-        /*  For each value we haven't seen yet... */
-            if ( std::find_if ( first1, iter, pred ) == iter ) {
-                std::size_t dest_count = std::count_if ( first2, last2, pred );
-                if ( dest_count == 0 || dest_count != (std::size_t) std::count_if ( iter, last1, pred ))
-                    return false;
-                }
-            }
+        return boost::algorithm::detail::is_permutation_inner ( first1, last1, first2, last2, p );
         }
 
     return true;
@@ -90,23 +138,84 @@ bool is_permutation ( ForwardIterator1 first1, ForwardIterator1 last1,
 /// \fn is_permutation ( ForwardIterator1 first, ForwardIterator1 last, ForwardIterator2 first2 )
 /// \brief Tests to see if the sequence [first,last) is a permutation of the sequence starting at first2
 ///
-/// \param first    The start of the input sequence
-/// \param last     One past the end of the input sequence
+/// \param first1   The start of the input sequence
+/// \param last2    One past the end of the input sequence
 /// \param first2   The start of the second sequence
 /// \note           This function is part of the C++2011 standard library.
 ///  We will use the standard one if it is available,
 ///     otherwise we have our own implementation.
 template< class ForwardIterator1, class ForwardIterator2 >
-bool is_permutation ( ForwardIterator1 first, ForwardIterator1 last, ForwardIterator2 first2 )
+bool is_permutation ( ForwardIterator1 first1, ForwardIterator1 last1, ForwardIterator2 first2 )
 {
 //  How should I deal with the idea that ForwardIterator1::value_type
 //  and ForwardIterator2::value_type could be different? Define my own comparison predicate?
-    return boost::algorithm::is_permutation ( first, last, first2,
-                          std::equal_to<typename std::iterator_traits<ForwardIterator1>::value_type> ());
+//  Skip the common prefix (if any)
+    std::pair<ForwardIterator1, ForwardIterator2> eq = std::mismatch (first1, last1, first2 );
+    first1 = eq.first;
+    first2 = eq.second;
+    if ( first1 != last1 ) {
+    //  Create last2
+        ForwardIterator2 last2 = first2;
+        std::advance ( last2, std::distance (first1, last1));
+        return boost::algorithm::detail::is_permutation_inner ( first1, last1, first2, last2,
+            std::equal_to<typename std::iterator_traits<ForwardIterator1>::value_type> ());
+        }
+    return true;
 }
 
 #endif
 
+/// \fn is_permutation ( ForwardIterator1 first, ForwardIterator1 last, 
+///                      ForwardIterator2 first2, ForwardIterator2 last2 )
+/// \brief Tests to see if the sequence [first,last) is a permutation of the sequence starting at first2
+///
+/// \param first1   The start of the input sequence
+/// \param last2    One past the end of the input sequence
+/// \param first2   The start of the second sequence
+/// \param last1    One past the end of the second sequence
+/// \note           This function is part of the C++2011 standard library.
+///  We will use the standard one if it is available,
+///     otherwise we have our own implementation.
+template< class ForwardIterator1, class ForwardIterator2 >
+bool is_permutation ( ForwardIterator1 first1, ForwardIterator1 last1, 
+                      ForwardIterator2 first2, ForwardIterator2 last2 )
+{
+//  How should I deal with the idea that ForwardIterator1::value_type
+//  and ForwardIterator2::value_type could be different? Define my own comparison predicate?
+    return boost::algorithm::detail::is_permutation_tag (
+        first1, last1, first2, last2, 
+        std::equal_to<typename std::iterator_traits<ForwardIterator1>::value_type> (),
+        typename std::iterator_traits<ForwardIterator1>::iterator_category (),
+        typename std::iterator_traits<ForwardIterator2>::iterator_category ());
+}
+
+/// \fn is_permutation ( ForwardIterator1 first, ForwardIterator1 last, 
+///                      ForwardIterator2 first2, ForwardIterator2 last2, 
+///                      BinaryPredicate p )
+/// \brief Tests to see if the sequence [first,last) is a permutation of the sequence starting at first2
+///
+/// \param first1   The start of the input sequence
+/// \param last1    One past the end of the input sequence
+/// \param first2   The start of the second sequence
+/// \param last2    One past the end of the second sequence
+/// \param pred     The predicate to compare elements with
+///
+/// \note           This function is part of the C++2011 standard library.
+///  We will use the standard one if it is available,
+///     otherwise we have our own implementation.
+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_tag (
+        first1, last1, first2, last2, pred, 
+        typename std::iterator_traits<ForwardIterator1>::iterator_category (),
+        typename std::iterator_traits<ForwardIterator2>::iterator_category ());
+}
+
+
+
 /// \fn is_permutation ( const Range &r, ForwardIterator first2 )
 /// \brief Tests to see if the sequence [first,last) is a permutation of the sequence starting at first2
 ///

include/boost/algorithm/cxx14/equal.hpp

@@ -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