diff options
Diffstat (limited to '3rdParty/Boost/src/boost/range/algorithm')
-rwxr-xr-x | 3rdParty/Boost/src/boost/range/algorithm/equal.hpp | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/range/algorithm/equal.hpp b/3rdParty/Boost/src/boost/range/algorithm/equal.hpp new file mode 100755 index 0000000..7226440 --- /dev/null +++ b/3rdParty/Boost/src/boost/range/algorithm/equal.hpp @@ -0,0 +1,188 @@ +// Boost.Range library +// +// Copyright Neil Groves 2009. +// Use, modification and distribution is subject to 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/libs/range/ +// +#ifndef BOOST_RANGE_ALGORITHM_EQUAL_HPP_INCLUDED +#define BOOST_RANGE_ALGORITHM_EQUAL_HPP_INCLUDED + +#include <boost/config.hpp> +#include <boost/range/concepts.hpp> +#include <iterator> + +namespace boost +{ + namespace range_detail + { + // An implementation of equality comparison that is optimized for iterator + // traversal categories less than RandomAccessTraversal. + template< class SinglePassTraversalReadableIterator1, + class SinglePassTraversalReadableIterator2, + class IteratorCategoryTag1, + class IteratorCategoryTag2 > + inline bool equal_impl( SinglePassTraversalReadableIterator1 first1, + SinglePassTraversalReadableIterator1 last1, + SinglePassTraversalReadableIterator2 first2, + SinglePassTraversalReadableIterator2 last2, + IteratorCategoryTag1, + IteratorCategoryTag2 ) + { + do + { + // If we have reached the end of the left range then this is + // the end of the loop. They are equal if and only if we have + // simultaneously reached the end of the right range. + if (first1 == last1) + return first2 == last2; + + // If we have reached the end of the right range at this line + // it indicates that the right range is shorter than the left + // and hence the result is false. + if (first2 == last2) + return false; + + // continue looping if and only if the values are equal + } while(*first1++ == *first2++); + + // Reaching this line in the algorithm indicates that a value + // inequality has been detected. + return false; + } + + template< class SinglePassTraversalReadableIterator1, + class SinglePassTraversalReadableIterator2, + class IteratorCategoryTag1, + class IteratorCategoryTag2, + class BinaryPredicate > + inline bool equal_impl( SinglePassTraversalReadableIterator1 first1, + SinglePassTraversalReadableIterator1 last1, + SinglePassTraversalReadableIterator2 first2, + SinglePassTraversalReadableIterator2 last2, + BinaryPredicate pred, + IteratorCategoryTag1, + IteratorCategoryTag2 ) + { + do + { + // If we have reached the end of the left range then this is + // the end of the loop. They are equal if and only if we have + // simultaneously reached the end of the right range. + if (first1 == last1) + return first2 == last2; + + // If we have reached the end of the right range at this line + // it indicates that the right range is shorter than the left + // and hence the result is false. + if (first2 == last2) + return false; + + // continue looping if and only if the values are equal + } while(pred(*first1++, *first2++)); + + // Reaching this line in the algorithm indicates that a value + // inequality has been detected. + return false; + } + + // An implementation of equality comparison that is optimized for + // random access iterators. + template< class RandomAccessTraversalReadableIterator1, + class RandomAccessTraversalReadableIterator2 > + inline bool equal_impl( RandomAccessTraversalReadableIterator1 first1, + RandomAccessTraversalReadableIterator1 last1, + RandomAccessTraversalReadableIterator2 first2, + RandomAccessTraversalReadableIterator2 last2, + std::random_access_iterator_tag, + std::random_access_iterator_tag ) + { + return ((last1 - first1) == (last2 - first2)) + && std::equal(first1, last1, first2); + } + + template< class RandomAccessTraversalReadableIterator1, + class RandomAccessTraversalReadableIterator2, + class BinaryPredicate > + inline bool equal_impl( RandomAccessTraversalReadableIterator1 first1, + RandomAccessTraversalReadableIterator1 last1, + RandomAccessTraversalReadableIterator2 first2, + RandomAccessTraversalReadableIterator2 last2, + BinaryPredicate pred ) + { + return ((last1 - first1) == (last2 - first2)) + && std::equal(first1, last1, first2, pred); + } + + template< class SinglePassTraversalReadableIterator1, + class SinglePassTraversalReadableIterator2 > + inline bool equal( SinglePassTraversalReadableIterator1 first1, + SinglePassTraversalReadableIterator1 last1, + SinglePassTraversalReadableIterator2 first2, + SinglePassTraversalReadableIterator2 last2 ) + { + BOOST_DEDUCED_TYPENAME std::iterator_traits< SinglePassTraversalReadableIterator1 >::iterator_category tag1; + BOOST_DEDUCED_TYPENAME std::iterator_traits< SinglePassTraversalReadableIterator2 >::iterator_category tag2; + + return equal_impl(first1, last1, first2, last2, tag1, tag2); + } + + template< class SinglePassTraversalReadableIterator1, + class SinglePassTraversalReadableIterator2, + class BinaryPredicate > + inline bool equal( SinglePassTraversalReadableIterator1 first1, + SinglePassTraversalReadableIterator1 last1, + SinglePassTraversalReadableIterator2 first2, + SinglePassTraversalReadableIterator2 last2, + BinaryPredicate pred ) + { + BOOST_DEDUCED_TYPENAME std::iterator_traits< SinglePassTraversalReadableIterator1 >::iterator_category tag1; + BOOST_DEDUCED_TYPENAME std::iterator_traits< SinglePassTraversalReadableIterator2 >::iterator_category tag2; + + return equal_impl(first1, last1, first2, last2, pred, tag1, tag2); + } + + } // namespace range_detail + + namespace range + { + + /// \brief template function equal + /// + /// range-based version of the equal std algorithm + /// + /// \pre SinglePassRange1 is a model of the SinglePassRangeConcept + /// \pre SinglePassRange2 is a model of the SinglePassRangeConcept + /// \pre BinaryPredicate is a model of the BinaryPredicateConcept + template< class SinglePassRange1, class SinglePassRange2 > + inline bool equal( const SinglePassRange1& rng1, const SinglePassRange2& rng2 ) + { + BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<SinglePassRange1> )); + BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<SinglePassRange2> )); + + return ::boost::range_detail::equal( + ::boost::begin(rng1), ::boost::end(rng1), + ::boost::begin(rng2), ::boost::end(rng2) ); + } + + /// \overload + template< class SinglePassRange1, class SinglePassRange2, class BinaryPredicate > + inline bool equal( const SinglePassRange1& rng1, const SinglePassRange2& rng2, + BinaryPredicate pred ) + { + BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<SinglePassRange1> )); + BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<SinglePassRange2> )); + + return ::boost::range_detail::equal( + ::boost::begin(rng1), ::boost::end(rng1), + ::boost::begin(rng2), ::boost::end(rng2), + pred); + } + + } // namespace range + using range::equal; +} // namespace boost + +#endif // include guard |