]>
Commit | Line | Data |
---|---|---|
b32b8144 FG |
1 | /* |
2 | Copyright (c) Marshall Clow 2017. | |
3 | ||
4 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
92f5a8d4 | 5 | file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
b32b8144 FG |
6 | */ |
7 | ||
8 | /// \file exclusive_scan.hpp | |
9 | /// \brief ??? | |
10 | /// \author Marshall Clow | |
11 | ||
12 | #ifndef BOOST_ALGORITHM_EXCLUSIVE_SCAN_HPP | |
13 | #define BOOST_ALGORITHM_EXCLUSIVE_SCAN_HPP | |
14 | ||
15 | #include <functional> // for std::plus | |
16 | #include <iterator> // for std::iterator_traits | |
17 | ||
92f5a8d4 | 18 | #include <boost/config.hpp> |
b32b8144 FG |
19 | #include <boost/range/begin.hpp> |
20 | #include <boost/range/end.hpp> | |
21 | #include <boost/range/value_type.hpp> | |
22 | ||
23 | namespace boost { namespace algorithm { | |
24 | ||
25 | template<class InputIterator, class OutputIterator, class T, class BinaryOperation> | |
26 | OutputIterator exclusive_scan(InputIterator first, InputIterator last, | |
27 | OutputIterator result, T init, BinaryOperation bOp) | |
28 | { | |
29 | if (first != last) | |
30 | { | |
31 | T saved = init; | |
32 | do | |
33 | { | |
34 | init = bOp(init, *first); | |
35 | *result = saved; | |
36 | saved = init; | |
37 | ++result; | |
38 | } while (++first != last); | |
39 | } | |
40 | return result; | |
41 | } | |
42 | ||
43 | template<class InputIterator, class OutputIterator, class T> | |
44 | OutputIterator exclusive_scan(InputIterator first, InputIterator last, | |
45 | OutputIterator result, T init) | |
46 | { | |
47 | typedef typename std::iterator_traits<InputIterator>::value_type VT; | |
92f5a8d4 | 48 | return boost::algorithm::exclusive_scan(first, last, result, init, std::plus<VT>()); |
b32b8144 FG |
49 | } |
50 | ||
51 | }} // namespace boost and algorithm | |
52 | ||
53 | #endif // BOOST_ALGORITHM_EXCLUSIVE_SCAN_HPP |