98 lines
3.5 KiB
C++
98 lines
3.5 KiB
C++
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// Copyright Neil Groves 2009. Use, modification and
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// distribution is subject to the Boost Software License, Version
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// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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//
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// For more information, see http://www.boost.org/libs/range/
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//
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#ifndef BOOST_RANGE_ALGORITHM_TRANSFORM_HPP_INCLUDED
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#define BOOST_RANGE_ALGORITHM_TRANSFORM_HPP_INCLUDED
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#include <boost/assert.hpp>
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#include <boost/concept_check.hpp>
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#include <boost/range/begin.hpp>
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#include <boost/range/end.hpp>
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#include <boost/range/concepts.hpp>
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#include <algorithm>
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namespace boost
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{
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namespace range
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{
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/// \brief template function transform
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///
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/// range-based version of the transform std algorithm
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///
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/// \pre SinglePassRange1 is a model of the SinglePassRangeConcept
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/// \pre SinglePassRange2 is a model of the SinglePassRangeConcept
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/// \pre OutputIterator is a model of the OutputIteratorConcept
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/// \pre UnaryOperation is a model of the UnaryFunctionConcept
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/// \pre BinaryOperation is a model of the BinaryFunctionConcept
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template< class SinglePassRange1,
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class OutputIterator,
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class UnaryOperation >
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inline OutputIterator
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transform(const SinglePassRange1& rng,
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OutputIterator out,
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UnaryOperation fun)
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{
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BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange1> ));
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return std::transform(boost::begin(rng),boost::end(rng),out,fun);
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}
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} // namespace range
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namespace range_detail
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{
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template< class SinglePassTraversalReadableIterator1,
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class SinglePassTraversalReadableIterator2,
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class OutputIterator,
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class BinaryFunction >
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inline OutputIterator
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transform_impl(SinglePassTraversalReadableIterator1 first1,
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SinglePassTraversalReadableIterator1 last1,
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SinglePassTraversalReadableIterator2 first2,
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SinglePassTraversalReadableIterator2 last2,
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OutputIterator out,
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BinaryFunction fn)
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{
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for (; first1 != last1; ++first1, ++first2)
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{
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BOOST_ASSERT( first2 != last2 );
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*out = fn(*first1, *first2);
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++out;
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}
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return out;
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}
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}
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namespace range
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{
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/// \overload
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template< class SinglePassRange1,
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class SinglePassRange2,
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class OutputIterator,
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class BinaryOperation >
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inline OutputIterator
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transform(const SinglePassRange1& rng1,
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const SinglePassRange2& rng2,
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OutputIterator out,
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BinaryOperation fun)
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{
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BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange1> ));
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BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange2> ));
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return range_detail::transform_impl(
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boost::begin(rng1), boost::end(rng1),
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boost::begin(rng2), boost::end(rng2),
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out, fun);
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}
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} // namespace range
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using range::transform;
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} // namespace boost
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#endif // include guard
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