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add numeric algorithm reduce, exclusive_scan, inclusize_scan

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bolero-MURAKAMI 2017-10-10 02:13:04 +09:00
commit 2052058357
34 changed files with 1195 additions and 18 deletions
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sprout/numeric/reduce.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_REDUCE_HPP
#define SPROUT_NUMERIC_REDUCE_HPP
#include <iterator>
#include <sprout/config.hpp>
#include <sprout/container/functions.hpp>
#include <sprout/numeric/accumulate.hpp>
namespace sprout {
//
// reduce
//
// recursion depth:
// O(log N)
//
template<typename InputIterator>
inline SPROUT_CONSTEXPR typename std::iterator_traits<InputIterator>::value_type
reduce(InputIterator first, InputIterator last) {
return sprout::accumulate(first, last, typename std::iterator_traits<InputIterator>::value_type());
}
template<typename InputIterator, typename T>
inline SPROUT_CONSTEXPR T
reduce(InputIterator first, InputIterator last, T init) {
return sprout::accumulate(first, last, init);
}
template<typename InputIterator, typename T, typename BinaryOperation>
inline SPROUT_CONSTEXPR T
reduce(InputIterator first, InputIterator last, T init, BinaryOperation binary_op) {
return sprout::accumulate(first, last, init, binary_op);
}
} // namespace sprout
#endif // #ifndef SPROUT_NUMERIC_REDUCE_HPP