1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
/*=============================================================================
Copyright (c) 2001-2011 Joel de Guzman
Copyright (c) 2007 Dan Marsden
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)
==============================================================================*/
#if !defined(BOOST_FUSION_COUNT_IF_09162005_0141)
#define BOOST_FUSION_COUNT_IF_09162005_0141
#include <boost/fusion/support/config.hpp>
#include <boost/mpl/bool.hpp>
#include <boost/fusion/sequence/intrinsic/begin.hpp>
#include <boost/fusion/sequence/intrinsic/end.hpp>
#include <boost/fusion/iterator/equal_to.hpp>
#include <boost/fusion/iterator/next.hpp>
#include <boost/fusion/iterator/deref.hpp>
#include <boost/fusion/iterator/equal_to.hpp>
#include <boost/fusion/iterator/distance.hpp>
#include <boost/fusion/iterator/advance.hpp>
namespace boost { namespace fusion {
struct random_access_traversal_tag;
namespace detail
{
template <typename First, typename Last, typename F>
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
inline int
linear_count_if(First const&, Last const&, F const&, mpl::true_)
{
return 0;
}
template <typename First, typename Last, typename F>
BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
inline int
linear_count_if(First const& first, Last const& last, F& f, mpl::false_)
{
int n =
detail::linear_count_if(
fusion::next(first)
, last
, f
, result_of::equal_to<typename result_of::next<First>::type, Last>());
if (f(*first))
++n;
return n;
}
template <typename Sequence, typename F, typename Tag>
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
inline int
count_if(Sequence const& seq, F f, Tag)
{
return detail::linear_count_if(
fusion::begin(seq)
, fusion::end(seq)
, f
, result_of::equal_to<
typename result_of::begin<Sequence>::type
, typename result_of::end<Sequence>::type>());
}
template<int n>
struct unrolled_count_if
{
template<typename I0, typename F>
BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
static int call(I0 const& i0, F f)
{
int ct = unrolled_count_if<n-4>::
call(fusion::advance_c<4>(i0), f);
if(f(*i0))
++ct;
typedef typename result_of::next<I0>::type I1;
I1 i1(fusion::next(i0));
if(f(*i1))
++ct;
typedef typename result_of::next<I1>::type I2;
I2 i2(fusion::next(i1));
if(f(*i2))
++ct;
typedef typename result_of::next<I2>::type I3;
I3 i3(fusion::next(i2));
if(f(*i3))
++ct;
return ct;
}
};
template<>
struct unrolled_count_if<3>
{
template<typename I0, typename F>
BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
static int call(I0 const& i0, F f)
{
int ct = 0;
if(f(*i0))
++ct;
typedef typename result_of::next<I0>::type I1;
I1 i1(fusion::next(i0));
if(f(*i1))
++ct;
typedef typename result_of::next<I1>::type I2;
I2 i2(fusion::next(i1));
if(f(*i2))
++ct;
return ct;
}
};
template<>
struct unrolled_count_if<2>
{
template<typename I0, typename F>
BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
static int call(I0 const& i0, F f)
{
int ct = 0;
if(f(*i0))
++ct;
typedef typename result_of::next<I0>::type I1;
I1 i1(fusion::next(i0));
if(f(*i1))
++ct;
return ct;
}
};
template<>
struct unrolled_count_if<1>
{
template<typename I0, typename F>
BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
static int call(I0 const& i0, F f)
{
int ct = 0;
if(f(*i0))
++ct;
return ct;
}
};
template<>
struct unrolled_count_if<0>
{
template<typename I0, typename F>
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
static int call(I0 const&, F)
{
return 0;
}
};
template <typename Sequence, typename F>
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
inline int
count_if(Sequence const& seq, F f, random_access_traversal_tag)
{
typedef typename result_of::begin<Sequence>::type begin;
typedef typename result_of::end<Sequence>::type end;
return detail::unrolled_count_if<result_of::distance<begin, end>::type::value>::
call(fusion::begin(seq), f);
}
}}}
#endif
|
