98 lines
3.4 KiB
C++
98 lines
3.4 KiB
C++
// 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 boost::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
|