| // 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_TRANSFORM_HPP_INCLUDED |
| #define BOOST_RANGE_ALGORITHM_TRANSFORM_HPP_INCLUDED |
| |
| #include <boost/assert.hpp> |
| #include <boost/concept_check.hpp> |
| #include <boost/range/begin.hpp> |
| #include <boost/range/end.hpp> |
| #include <boost/range/concepts.hpp> |
| #include <algorithm> |
| |
| namespace boost |
| { |
| namespace range |
| { |
| |
| /// \brief template function transform |
| /// |
| /// range-based version of the transform std algorithm |
| /// |
| /// \pre SinglePassRange1 is a model of the SinglePassRangeConcept |
| /// \pre SinglePassRange2 is a model of the SinglePassRangeConcept |
| /// \pre OutputIterator is a model of the OutputIteratorConcept |
| /// \pre UnaryOperation is a model of the UnaryFunctionConcept |
| /// \pre BinaryOperation is a model of the BinaryFunctionConcept |
| template< class SinglePassRange1, |
| class OutputIterator, |
| class UnaryOperation > |
| inline OutputIterator |
| transform(const SinglePassRange1& rng, |
| OutputIterator out, |
| UnaryOperation fun) |
| { |
| BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange1> )); |
| return std::transform(boost::begin(rng),boost::end(rng),out,fun); |
| } |
| |
| } // namespace range |
| |
| namespace range_detail |
| { |
| template< class SinglePassTraversalReadableIterator1, |
| class SinglePassTraversalReadableIterator2, |
| class OutputIterator, |
| class BinaryFunction > |
| inline OutputIterator |
| transform_impl(SinglePassTraversalReadableIterator1 first1, |
| SinglePassTraversalReadableIterator1 last1, |
| SinglePassTraversalReadableIterator2 first2, |
| SinglePassTraversalReadableIterator2 last2, |
| OutputIterator out, |
| BinaryFunction fn) |
| { |
| for (; first1 != last1; ++first1, ++first2) |
| { |
| BOOST_ASSERT( first2 != last2 ); |
| *out = fn(*first1, *first2); |
| ++out; |
| } |
| return out; |
| } |
| } |
| |
| namespace range |
| { |
| |
| /// \overload |
| template< class SinglePassRange1, |
| class SinglePassRange2, |
| class OutputIterator, |
| class BinaryOperation > |
| inline OutputIterator |
| transform(const SinglePassRange1& rng1, |
| const SinglePassRange2& rng2, |
| OutputIterator out, |
| BinaryOperation fun) |
| { |
| BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange1> )); |
| BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange2> )); |
| return range_detail::transform_impl( |
| boost::begin(rng1), boost::end(rng1), |
| boost::begin(rng2), boost::end(rng2), |
| out, fun); |
| } |
| |
| } // namespace range |
| using range::transform; |
| } // namespace boost |
| |
| #endif // include guard |