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
|
// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
#pragma once
#if !defined(RXCPP_OPERATORS_RX_MAP_HPP)
#define RXCPP_OPERATORS_RX_MAP_HPP
#include "../rx-includes.hpp"
namespace rxcpp {
namespace operators {
namespace detail {
template<class T, class Selector>
struct map
{
typedef typename std::decay<T>::type source_value_type;
typedef typename std::decay<Selector>::type select_type;
typedef decltype((*(select_type*)nullptr)(*(source_value_type*)nullptr)) value_type;
select_type selector;
map(select_type s)
: selector(std::move(s))
{
}
template<class Subscriber>
struct map_observer
{
typedef map_observer<Subscriber> this_type;
typedef decltype((*(select_type*)nullptr)(*(source_value_type*)nullptr)) value_type;
typedef typename std::decay<Subscriber>::type dest_type;
typedef observer<T, this_type> observer_type;
dest_type dest;
select_type selector;
map_observer(dest_type d, select_type s)
: dest(std::move(d))
, selector(std::move(s))
{
}
void on_next(source_value_type v) const {
auto selected = on_exception(
[&](){
return this->selector(std::move(v));},
dest);
if (selected.empty()) {
return;
}
dest.on_next(std::move(selected.get()));
}
void on_error(std::exception_ptr e) const {
dest.on_error(e);
}
void on_completed() const {
dest.on_completed();
}
static subscriber<T, observer_type> make(dest_type d, select_type s) {
auto cs = d.get_subscription();
return make_subscriber<T>(std::move(cs), observer_type(this_type(std::move(d), std::move(s))));
}
};
template<class Subscriber>
auto operator()(Subscriber dest) const
-> decltype(map_observer<Subscriber>::make(std::move(dest), selector)) {
return map_observer<Subscriber>::make(std::move(dest), selector);
}
};
template<class Selector>
class map_factory
{
typedef typename std::decay<Selector>::type select_type;
select_type selector;
public:
map_factory(select_type s) : selector(std::move(s)) {}
template<class Observable>
auto operator()(Observable&& source)
-> decltype(source.lift<typename map<typename std::decay<Observable>::type::value_type, select_type>::value_type>(map<typename std::decay<Observable>::type::value_type, select_type>(selector))) {
return source.lift<typename map<typename std::decay<Observable>::type::value_type, select_type>::value_type>(map<typename std::decay<Observable>::type::value_type, select_type>(selector));
}
};
}
template<class Selector>
auto map(Selector&& p)
-> detail::map_factory<Selector> {
return detail::map_factory<Selector>(std::forward<Selector>(p));
}
}
}
#endif
|
