boostorg/algorithm
1
0
Fork 1
mirror of https://github.com/boostorg/algorithm.git synced 2025-07-02 23:36:52 +02:00
Code Issues Packages Projects Releases Wiki Activity

Merge from develop: clean up is_permutation; fix clamp interface, and merge fix for bug #9335 as well

Browse Source
This commit is contained in:
Marshall Clow
2014-03-31 12:03:45 -07:00
parent 645be22fa7 0f63883818
commit cf249c090c
5 changed files with 92 additions and 185 deletions
Download Patch File Download Diff File Expand all files Collapse all files

40
include/boost/algorithm/clamp.hpp
View File

@ -31,8 +31,8 @@
namespace boost { namespace algorithm {
/// \fn clamp ( T const& val,
/// typename boost::mpl::identity<T>::type const& lo,
/// typename boost::mpl::identity<T>::type const& hi, Pred p )
/// typename boost::mpl::identity<T>::type const & lo,
/// typename boost::mpl::identity<T>::type const & hi, Pred p )
/// \return the value "val" brought into the range [ lo, hi ]
/// using the comparison predicate p.
/// If p ( val, lo ) return lo.
@ -56,8 +56,8 @@ namespace boost { namespace algorithm {
/// \fn clamp ( T const& val,
/// typename boost::mpl::identity<T>::type const& lo,
/// typename boost::mpl::identity<T>::type const& hi )
/// typename boost::mpl::identity<T>::type const & lo,
/// typename boost::mpl::identity<T>::type const & hi )
/// \return the value "val" brought into the range [ lo, hi ].
/// If the value is less than lo, return lo.
/// If the value is greater than "hi", return hi.
@ -76,8 +76,8 @@ namespace boost { namespace algorithm {
}
/// \fn clamp_range ( InputIterator first, InputIterator last, OutputIterator out,
/// std::iterator_traits<InputIterator>::value_type lo,
/// std::iterator_traits<InputIterator>::value_type hi )
/// std::iterator_traits<InputIterator>::value_type const & lo,
/// std::iterator_traits<InputIterator>::value_type const & hi )
/// \return clamp the sequence of values [first, last) into [ lo, hi ]
///
/// \param first The start of the range of values
@ -88,8 +88,8 @@ namespace boost { namespace algorithm {
///
template<typename InputIterator, typename OutputIterator>
OutputIterator clamp_range ( InputIterator first, InputIterator last, OutputIterator out,
typename std::iterator_traits<InputIterator>::value_type lo,
typename std::iterator_traits<InputIterator>::value_type hi )
typename std::iterator_traits<InputIterator>::value_type const & lo,
typename std::iterator_traits<InputIterator>::value_type const & hi )
{
// this could also be written with bind and std::transform
while ( first != last )
@ -98,8 +98,8 @@ namespace boost { namespace algorithm {
}
/// \fn clamp_range ( const Range &r, OutputIterator out,
/// typename std::iterator_traits<typename boost::range_iterator<const Range>::type>::value_type lo,
/// typename std::iterator_traits<typename boost::range_iterator<const Range>::type>::value_type hi )
/// typename std::iterator_traits<typename boost::range_iterator<const Range>::type>::value_type const & lo,
/// typename std::iterator_traits<typename boost::range_iterator<const Range>::type>::value_type const & hi )
/// \return clamp the sequence of values [first, last) into [ lo, hi ]
///
/// \param r The range of values to be clamped
@ -110,16 +110,16 @@ namespace boost { namespace algorithm {
template<typename Range, typename OutputIterator>
typename boost::disable_if_c<boost::is_same<Range, OutputIterator>::value, OutputIterator>::type
clamp_range ( const Range &r, OutputIterator out,
typename std::iterator_traits<typename boost::range_iterator<const Range>::type>::value_type lo,
typename std::iterator_traits<typename boost::range_iterator<const Range>::type>::value_type hi )
typename std::iterator_traits<typename boost::range_iterator<const Range>::type>::value_type const & lo,
typename std::iterator_traits<typename boost::range_iterator<const Range>::type>::value_type const & hi )
{
return clamp_range ( boost::begin ( r ), boost::end ( r ), out, lo, hi );
}
/// \fn clamp_range ( InputIterator first, InputIterator last, OutputIterator out,
/// std::iterator_traits<InputIterator>::value_type lo,
/// std::iterator_traits<InputIterator>::value_type hi, Pred p )
/// std::iterator_traits<InputIterator>::value_type const & lo,
/// std::iterator_traits<InputIterator>::value_type const & hi, Pred p )
/// \return clamp the sequence of values [first, last) into [ lo, hi ]
/// using the comparison predicate p.
///
@ -134,8 +134,8 @@ namespace boost { namespace algorithm {
///
template<typename InputIterator, typename OutputIterator, typename Pred>
OutputIterator clamp_range ( InputIterator first, InputIterator last, OutputIterator out,
typename std::iterator_traits<InputIterator>::value_type lo,
typename std::iterator_traits<InputIterator>::value_type hi, Pred p )
typename std::iterator_traits<InputIterator>::value_type const & lo,
typename std::iterator_traits<InputIterator>::value_type const & hi, Pred p )
{
// this could also be written with bind and std::transform
while ( first != last )
@ -144,8 +144,8 @@ namespace boost { namespace algorithm {
}
/// \fn clamp_range ( const Range &r, OutputIterator out,
/// typename std::iterator_traits<typename boost::range_iterator<const Range>::type>::value_type lo,
/// typename std::iterator_traits<typename boost::range_iterator<const Range>::type>::value_type hi,
/// typename std::iterator_traits<typename boost::range_iterator<const Range>::type>::value_type const & lo,
/// typename std::iterator_traits<typename boost::range_iterator<const Range>::type>::value_type const & hi,
/// Pred p )
/// \return clamp the sequence of values [first, last) into [ lo, hi ]
/// using the comparison predicate p.
@ -162,8 +162,8 @@ namespace boost { namespace algorithm {
template<typename Range, typename OutputIterator, typename Pred>
typename boost::disable_if_c<boost::is_same<Range, OutputIterator>::value, OutputIterator>::type
clamp_range ( const Range &r, OutputIterator out,
typename std::iterator_traits<typename boost::range_iterator<const Range>::type>::value_type lo,
typename std::iterator_traits<typename boost::range_iterator<const Range>::type>::value_type hi,
typename std::iterator_traits<typename boost::range_iterator<const Range>::type>::value_type const & lo,
typename std::iterator_traits<typename boost::range_iterator<const Range>::type>::value_type const & hi,
Pred p )
{
return clamp_range ( boost::begin ( r ), boost::end ( r ), out, lo, hi, p );

56
include/boost/algorithm/cxx11/is_permutation.hpp
View File

@ -9,8 +9,8 @@
/// \brief Is a sequence a permutation of another sequence
/// \author Marshall Clow
#ifndef BOOST_ALGORITHM_IS_PERMUTATION_HPP
#define BOOST_ALGORITHM_IS_PERMUTATION_HPP
#ifndef BOOST_ALGORITHM_IS_PERMUTATION11_HPP
#define BOOST_ALGORITHM_IS_PERMUTATION11_HPP
#include <algorithm> // for std::less, tie, mismatch and is_permutation (if available)
#include <utility> // for std::make_pair
@ -163,56 +163,6 @@ bool is_permutation ( ForwardIterator1 first1, ForwardIterator1 last1, ForwardIt
#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
@ -243,4 +193,4 @@ is_permutation ( const Range &r, ForwardIterator first2, BinaryPredicate pred )
}}
#endif // BOOST_ALGORITHM_IS_PERMUTATION_HPP
#endif // BOOST_ALGORITHM_IS_PERMUTATION11_HPP

180
include/boost/algorithm/cxx14/is_permutation.hpp
View File

@ -1,130 +1,86 @@
/*
Copyright (c) Marshall Clow 2013
Copyright (c) Marshall Clow 2014.
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
/// \file is_permutation.hpp
/// \brief Is a sequence a permutation of another sequence (four iterator versions)
/// \author Marshall Clow
#ifndef BOOST_ALGORITHM_IS_PERMUTATION_HPP
#define BOOST_ALGORITHM_IS_PERMUTATION_HPP
#ifndef BOOST_ALGORITHM_IS_PERMUTATION14_HPP
#define BOOST_ALGORITHM_IS_PERMUTATION14_HPP
#include <algorithm>
#include <functional> // for std::equal_to
#include <algorithm> // for std::less, tie, mismatch and is_permutation (if available)
#include <utility> // for std::make_pair
#include <functional> // for std::equal_to
#include <iterator>
#include <boost/algorithm/cxx11/is_permutation.hpp>
#include <boost/algorithm/cxx14/mismatch.hpp>
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>
#if __cplusplus <= 201103L
/// \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++2014 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 )
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 ());
// How should I deal with the idea that ForwardIterator1::value_type
// and ForwardIterator2::value_type could be different? Define my own comparison predicate?
std::pair<ForwardIterator1, ForwardIterator2> eq = boost::algorithm::mismatch
( first1, last1, first2, last2 );
if ( eq.first == last1 && eq.second == last2)
return true;
return boost::algorithm::detail::is_permutation_tag (
eq.first, last1, eq.second, 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 ());
}
// There are already range-based versions of these.
/// \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++2014 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 )
{
std::pair<ForwardIterator1, ForwardIterator2> eq = boost::algorithm::mismatch
( first1, last1, first2, last2, pred );
if ( eq.first == last1 && eq.second == last2)
return true;
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 ());
}
#endif
}} // namespace boost and algorithm
}}
#endif // BOOST_ALGORITHM_IS_PERMUTATION_HPP
#endif // BOOST_ALGORITHM_IS_PERMUTATION14_HPP

2
include/boost/algorithm/string/find_iterator.hpp
View File

@ -230,7 +230,7 @@ namespace boost {
\post eof()==true
*/
split_iterator() {}
split_iterator() { m_bEof = true; }
//! Copy constructor
/*!
Construct a copy of the split_iterator

1
test/is_permutation_test1.cpp
View File

@ -11,6 +11,7 @@
#include <boost/config.hpp>
#include <boost/algorithm/cxx11/is_permutation.hpp>
#include <boost/algorithm/cxx14/is_permutation.hpp>
#define BOOST_TEST_MAIN
#include <boost/test/unit_test.hpp>