-
Notifications
You must be signed in to change notification settings - Fork 0
/
signal.h
80 lines (67 loc) · 1.43 KB
/
signal.h
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
#ifndef SIGNAL_H
#define SIGNAL_H
#include <functional>
#include <list>
template<typename R, typename... Args>
class SignalCommon
{
public:
using Slot = typename std::function<R (Args...)>;
using SlotID = typename std::list<Slot>::const_iterator;
inline const SlotID connect(const Slot& cbFn)
{
return slots.insert(slots.cend(), cbFn);
}
inline const SlotID disconnect(const SlotID& itr)
{
return slots.erase(itr);
}
inline void clear()
{
slots.clear();
}
inline void operator ()(const Args&... args)
{
auto itr = slots.cbegin();
auto end = slots.cend();
bool next = true;
while (itr != end)
{
const Slot& fn = *itr++;
fn(args...);
}
}
protected:
SignalCommon() = default;
protected:
std::list<Slot> slots;
};
template<typename R, typename... Args>
class Signal;
template<typename R, typename... Args>
struct Signal<R (Args...)> : SignalCommon<R, Args...>
{
template<typename Ret>
inline Ret emit(std::function<Ret (Ret, R)> op, const Args&... args)
{
auto itr = this->slots.cbegin();
auto end = this->slots.cend();
bool next = true;
Ret ret;
while (itr != end)
{
auto fn = *itr++;
ret = op(ret, fn(args...));
}
return ret;
}
};
template<typename... Args>
struct Signal<void (Args...)> : SignalCommon<void, Args...>
{
inline void emit(const Args&... args)
{
this->operator()(args...);
}
};
#endif // SIGNAL_H