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
|
// 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_REPEAT_HPP)
#define RXCPP_OPERATORS_RX_REPEAT_HPP
#include "../rx-includes.hpp"
namespace rxcpp {
namespace operators {
namespace detail {
template<class T, class Observable, class Count>
struct repeat : public operator_base<T>
{
typedef rxu::decay_t<Observable> source_type;
typedef rxu::decay_t<Count> count_type;
struct values
{
values(source_type s, count_type t)
: source(std::move(s))
, remaining(std::move(t))
, repeat_infinitely(t == 0)
{
}
source_type source;
count_type remaining;
bool repeat_infinitely;
};
values initial;
repeat(source_type s, count_type t)
: initial(std::move(s), std::move(t))
{
}
template<class Subscriber>
void on_subscribe(const Subscriber& s) const {
typedef Subscriber output_type;
struct state_type
: public std::enable_shared_from_this<state_type>
, public values
{
state_type(const values& i, const output_type& oarg)
: values(i)
, source_lifetime(composite_subscription::empty())
, out(oarg)
{
}
composite_subscription source_lifetime;
output_type out;
void do_subscribe() {
auto state = this->shared_from_this();
state->source_lifetime = composite_subscription();
state->out.add(state->source_lifetime);
state->source.subscribe(
state->out,
state->source_lifetime,
// on_next
[state](T t) {
state->out.on_next(t);
},
// on_error
[state](std::exception_ptr e) {
state->out.on_error(e);
},
// on_completed
[state]() {
if (state->repeat_infinitely || (--state->remaining > 0)) {
state->do_subscribe();
} else {
state->out.on_completed();
}
}
);
}
};
// take a copy of the values for each subscription
auto state = std::shared_ptr<state_type>(new state_type(initial, s));
// start the first iteration
state->do_subscribe();
}
};
template<class T>
class repeat_factory
{
typedef rxu::decay_t<T> count_type;
count_type count;
public:
repeat_factory(count_type t) : count(std::move(t)) {}
template<class Observable>
auto operator()(Observable&& source)
-> observable<rxu::value_type_t<rxu::decay_t<Observable>>, repeat<rxu::value_type_t<rxu::decay_t<Observable>>, Observable, count_type>> {
return observable<rxu::value_type_t<rxu::decay_t<Observable>>, repeat<rxu::value_type_t<rxu::decay_t<Observable>>, Observable, count_type>>(
repeat<rxu::value_type_t<rxu::decay_t<Observable>>, Observable, count_type>(std::forward<Observable>(source), count));
}
};
}
template<class T>
auto repeat(T&& t)
-> detail::repeat_factory<T> {
return detail::repeat_factory<T>(std::forward<T>(t));
}
}
}
#endif
|
