blob: 346d0f00f446305946b7eeceb6fc7a475e68261e (
plain) (
blame)
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
|
#pragma once
#include <utility>
#include <functional>
#include <map>
template<class T>
class FSM {
public:
using Transaction = std::pair<T, T>;
using Handler = std::function<void(T &)>;
FSM(T initialState) : state(initialState), previousState(initialState) {}
~FSM() = default;
void Update() {
auto &handler = handlers[Transaction{previousState, state}];
if (handler)
handler(state);
previousState = state;
}
void RegisterHandler(T state, Handler handler) {
handlers[Transaction{state, state}] = handler;
}
void RegisterTransactionHandler(Transaction transaction, Handler handler) {
handlers[transaction] = handler;
}
private:
T previousState;
T state;
std::map<Transaction, Handler> handlers;
};
|
