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
|
#ifndef INCLUDED_FIBO_
#define INCLUDED_FIBO_
#include <iostream>
#include <cstddef>
#include <coroutine>
class Fibo
{
class State
{
size_t d_value;
public:
Fibo get_return_object();
std::suspend_always yield_value(size_t value);
static std::suspend_always initial_suspend();
static std::suspend_always final_suspend() noexcept;
static void unhandled_exception();
size_t value() const;
};
std::coroutine_handle<State> d_handle;
public:
using promise_type = State;
explicit Fibo(std::coroutine_handle<State> handle);
~Fibo();
size_t next();
};
inline std::suspend_always Fibo::State::initial_suspend()
{
return {};
}
inline std::suspend_always Fibo::State::final_suspend() noexcept
{
return {};
}
inline void Fibo::State::unhandled_exception()
{}
inline Fibo Fibo::State::get_return_object()
{
return Fibo{ std::coroutine_handle<State>::from_promise(*this) };
}
inline std::suspend_always Fibo::State::yield_value(size_t value)
{
d_value = value;
return {};
}
inline size_t Fibo::State::value() const
{
return d_value;
}
//------------------------------------------------------------
inline Fibo::Fibo(std::coroutine_handle<State> handle)
:
d_handle(handle)
{}
inline Fibo::~Fibo()
{
if (d_handle)
d_handle.destroy();
}
#endif
|
