// 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