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add C++17 transform_exclusive_scan, transform_inclusive_scan

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bolero-MURAKAMI 2017-10-11 11:58:29 +09:00
parent 9ce83b0863
commit 786c4f3b1e
26 changed files with 893 additions and 1 deletions
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42
sprout/numeric/cxx14/transform_exclusive_scan.hpp Normal file
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/*=============================================================================
Copyright (c) 2011-2017 Bolero MURAKAMI
https://github.com/bolero-MURAKAMI/Sprout
Distributed under 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)
=============================================================================*/
#ifndef SPROUT_NUMERIC_CXX14_TRANSFORM_EXCLUSIVE_SCAN_HPP
#define SPROUT_NUMERIC_CXX14_TRANSFORM_EXCLUSIVE_SCAN_HPP
#include <sprout/config.hpp>
#include <sprout/utility/move.hpp>
#include <sprout/iterator/type_traits/is_iterator_of.hpp>
#include <sprout/type_traits/enabler_if.hpp>
namespace sprout {
//
// 29.8.9 Transform exclusive scan
//
template<
typename InputIterator, typename OutputIterator, typename T, typename BinaryOperation, typename UnaryOperation,
typename sprout::enabler_if<sprout::is_iterator_outputable<OutputIterator>::value>::type = sprout::enabler
>
inline SPROUT_CXX14_CONSTEXPR OutputIterator
transform_exclusive_scan(InputIterator first, InputIterator last, OutputIterator result, T init, BinaryOperation binary_op, UnaryOperation unary_op) {
typedef typename std::iterator_traits<InputIterator>::value_type value_type;
value_type sum = sprout::move(init);
*result = sum;
if (first == last) {
return ++result;
}
value_type temp = unary_op(*first);
while (++first != last) {
sum = binary_op(sum, temp);
*++result = sum;
temp = unary_op(*first);
}
return ++result;
}
} // namespace sprout
#endif // #ifndef SPROUT_NUMERIC_CXX14_TRANSFORM_EXCLUSIVE_SCAN_HPP