source: NonGTP/Boost/boost/lambda/numeric.hpp @ 857

Revision 857, 2.8 KB checked in by igarcia, 19 years ago (diff)
RevLine 
[857]1// -- numeric.hpp -- Boost Lambda Library -----------------------------------
2// Copyright (C) 2002 Jaakko Järvi (jaakko.jarvi@cs.utu.fi)
3// Copyright (C) 2002 Gary Powell (gwpowell@hotmail.com)
4//
5// Distributed under the Boost Software License, Version 1.0. (See
6// accompanying file LICENSE_1_0.txt or copy at
7// http://www.boost.org/LICENSE_1_0.txt)
8//
9// For more information, see http://www.boost.org
10
11#ifndef BOOST_LAMBDA_NUMERIC_HPP
12#define BOOST_LAMBDA_NUMERIC_HPP
13
14#include "boost/lambda/core.hpp"
15
16#include <numeric>
17
18namespace boost {
19  namespace lambda {
20
21namespace ll {
22
23// accumulate ---------------------------------
24
25struct accumulate {
26 
27  template <class Args>
28  struct sig {
29    typedef typename boost::remove_const<
30        typename boost::tuples::element<3, Args>::type
31     >::type type;
32  };
33
34  template <class A, class B, class C>
35  C
36  operator()(A a, B b, C c) const
37  { return ::std::accumulate(a, b, c); }
38
39  template <class A, class B, class C, class D>
40  C
41  operator()(A a, B b, C c, D d) const
42  { return ::std::accumulate(a, b, c, d); }
43};
44
45// inner_product ---------------------------------
46
47struct inner_product {
48 
49  template <class Args>
50  struct sig {
51    typedef typename boost::remove_const<
52        typename boost::tuples::element<4, Args>::type
53     >::type type;
54  };
55
56  template <class A, class B, class C, class D>
57  D
58  operator()(A a, B b, C c, D d) const
59  { return ::std::inner_product(a, b, c, d); }
60
61  template <class A, class B, class C, class D, class E, class F>
62  D
63  operator()(A a, B b, C c, D d, E e, F f) const
64  { return ::std::inner_product(a, b, c, d, e, f); }
65};
66
67
68// partial_sum ---------------------------------
69
70struct partial_sum {
71 
72  template <class Args>
73  struct sig {
74    typedef typename boost::remove_const<
75        typename boost::tuples::element<3, Args>::type
76     >::type type;
77  };
78
79  template <class A, class B, class C>
80  C
81  operator()(A a, B b, C c) const
82  { return ::std::partial_sum(a, b, c); }
83
84  template <class A, class B, class C, class D>
85  C
86  operator()(A a, B b, C c, D d) const
87  { return ::std::partial_sum(a, b, c, d); }
88};
89
90// adjacent_difference ---------------------------------
91
92struct adjacent_difference {
93 
94  template <class Args>
95  struct sig {
96    typedef typename boost::remove_const<
97        typename boost::tuples::element<3, Args>::type
98     >::type type;
99  };
100
101  template <class A, class B, class C>
102  C
103  operator()(A a, B b, C c) const
104  { return ::std::adjacent_difference(a, b, c); }
105
106  template <class A, class B, class C, class D>
107  C
108  operator()(A a, B b, C c, D d) const
109  { return ::std::adjacent_difference(a, b, c, d); }
110};
111
112} // end of ll namespace
113
114} // end of lambda namespace
115} // end of boost namespace
116
117
118
119#endif
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