1 // Copyright Neil Groves 2009. Use, modification and
2 // distribution is subject to the Boost Software License, Version
3 // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
4 // http://www.boost.org/LICENSE_1_0.txt)
7 // For more information, see http://www.boost.org/libs/range/
9 #ifndef BOOST_RANGE_ALGORITHM_TRANSFORM_HPP_INCLUDED
10 #define BOOST_RANGE_ALGORITHM_TRANSFORM_HPP_INCLUDED
12 #include <boost/assert.hpp>
13 #include <boost/concept_check.hpp>
14 #include <boost/range/begin.hpp>
15 #include <boost/range/end.hpp>
16 #include <boost/range/concepts.hpp>
24 /// \brief template function transform
26 /// range-based version of the transform std algorithm
28 /// \pre SinglePassRange1 is a model of the SinglePassRangeConcept
29 /// \pre SinglePassRange2 is a model of the SinglePassRangeConcept
30 /// \pre OutputIterator is a model of the OutputIteratorConcept
31 /// \pre UnaryOperation is a model of the UnaryFunctionConcept
32 /// \pre BinaryOperation is a model of the BinaryFunctionConcept
33 template< class SinglePassRange1,
35 class UnaryOperation >
37 transform(const SinglePassRange1& rng,
41 BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange1> ));
42 return std::transform(boost::begin(rng),boost::end(rng),out,fun);
47 namespace range_detail
49 template< class SinglePassTraversalReadableIterator1,
50 class SinglePassTraversalReadableIterator2,
52 class BinaryFunction >
54 transform_impl(SinglePassTraversalReadableIterator1 first1,
55 SinglePassTraversalReadableIterator1 last1,
56 SinglePassTraversalReadableIterator2 first2,
57 SinglePassTraversalReadableIterator2 last2,
61 for (; first1 != last1 && first2 != last2; ++first1, ++first2)
63 *out = fn(*first1, *first2);
74 template< class SinglePassRange1,
75 class SinglePassRange2,
77 class BinaryOperation >
79 transform(const SinglePassRange1& rng1,
80 const SinglePassRange2& rng2,
84 BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange1> ));
85 BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange2> ));
86 return boost::range_detail::transform_impl(
87 boost::begin(rng1), boost::end(rng1),
88 boost::begin(rng2), boost::end(rng2),
93 using range::transform;
96 #endif // include guard