prosody
082c7d856e61
util/fsm.lua

Find changesets by keywords by author, files, the commit message, revision number or hash, or revset expression.

Software / code / prosody

Annotate

util/fsm.lua @ 13170:082c7d856e61

core, plugins: Split prosody:user role into prosody:{guest,registered,member} This gives us more granular control over different types of user account. Accounts registered by IBR get assigned prosody:registered by default, while accounts provisioned by an admin (e.g. via prosodyctl shell) will receive prosody:member by default.
author Matthew Wild <mwild1@gmail.com>
date Thu, 29 Jun 2023 15:36:13 +0100
parent 13165:9c13c11b199d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
13165
9c13c11b199d renamening: Fix newly added imports to use the new namespace
Kim Alvefur <zash@zash.se>
parents: 13019
diff changeset
1 local events = require "prosody.util.events";
13019
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
2
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
3 local fsm_methods = {};
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
4 local fsm_mt = { __index = fsm_methods };
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
5
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
6 local function is_fsm(o)
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
7 local mt = getmetatable(o);
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
8 return mt == fsm_mt;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
9 end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
10
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
11 local function notify_transition(fire_event, transition_event)
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
12 local ret;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
13 ret = fire_event("transition", transition_event);
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
14 if ret ~= nil then return ret; end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
15 if transition_event.from ~= transition_event.to then
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
16 ret = fire_event("leave/"..transition_event.from, transition_event);
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
17 if ret ~= nil then return ret; end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
18 end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
19 ret = fire_event("transition/"..transition_event.name, transition_event);
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
20 if ret ~= nil then return ret; end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
21 end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
22
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
23 local function notify_transitioned(fire_event, transition_event)
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
24 if transition_event.to ~= transition_event.from then
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
25 fire_event("enter/"..transition_event.to, transition_event);
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
26 end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
27 if transition_event.name then
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
28 fire_event("transitioned/"..transition_event.name, transition_event);
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
29 end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
30 fire_event("transitioned", transition_event);
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
31 end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
32
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
33 local function do_transition(name)
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
34 return function (self, attr)
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
35 local new_state = self.fsm.states[self.state][name] or self.fsm.states["*"][name];
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
36 if not new_state then
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
37 return error(("Invalid state transition: %s cannot %s"):format(self.state, name));
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
38 end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
39
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
40 local transition_event = {
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
41 instance = self;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
42
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
43 name = name;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
44 to = new_state;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
45 to_attr = attr;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
46
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
47 from = self.state;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
48 from_attr = self.state_attr;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
49 };
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
50
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
51 local fire_event = self.fsm.events.fire_event;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
52 local ret = notify_transition(fire_event, transition_event);
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
53 if ret ~= nil then return nil, ret; end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
54
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
55 self.state = new_state;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
56 self.state_attr = attr;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
57
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
58 notify_transitioned(fire_event, transition_event);
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
59 return true;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
60 end;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
61 end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
62
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
63 local function new(desc)
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
64 local self = setmetatable({
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
65 default_state = desc.default_state;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
66 events = events.new();
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
67 }, fsm_mt);
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
68
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
69 -- states[state_name][transition_name] = new_state_name
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
70 local states = { ["*"] = {} };
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
71 if desc.default_state then
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
72 states[desc.default_state] = {};
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
73 end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
74 self.states = states;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
75
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
76 local instance_methods = {};
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
77 self._instance_mt = { __index = instance_methods };
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
78
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
79 for _, transition in ipairs(desc.transitions or {}) do
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
80 local from_states = transition.from;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
81 if type(from_states) ~= "table" then
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
82 from_states = { from_states };
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
83 end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
84 for _, from in ipairs(from_states) do
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
85 if not states[from] then
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
86 states[from] = {};
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
87 end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
88 if not states[transition.to] then
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
89 states[transition.to] = {};
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
90 end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
91 if states[from][transition.name] then
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
92 return error(("Duplicate transition in FSM specification: %s from %s"):format(transition.name, from));
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
93 end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
94 states[from][transition.name] = transition.to;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
95 end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
96
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
97 -- Add public method to trigger this transition
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
98 instance_methods[transition.name] = do_transition(transition.name);
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
99 end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
100
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
101 if desc.state_handlers then
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
102 for state_name, handler in pairs(desc.state_handlers) do
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
103 self.events.add_handler("enter/"..state_name, handler);
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
104 end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
105 end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
106
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
107 if desc.transition_handlers then
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
108 for transition_name, handler in pairs(desc.transition_handlers) do
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
109 self.events.add_handler("transition/"..transition_name, handler);
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
110 end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
111 end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
112
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
113 if desc.handlers then
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
114 self.events.add_handlers(desc.handlers);
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
115 end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
116
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
117 return self;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
118 end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
119
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
120 function fsm_methods:init(state_name, state_attr)
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
121 local initial_state = assert(state_name or self.default_state, "no initial state specified");
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
122 if not self.states[initial_state] then
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
123 return error("Invalid initial state: "..initial_state);
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
124 end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
125 local instance = setmetatable({
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
126 fsm = self;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
127 state = initial_state;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
128 state_attr = state_attr;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
129 }, self._instance_mt);
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
130
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
131 if initial_state ~= self.default_state then
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
132 local fire_event = self.events.fire_event;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
133 notify_transitioned(fire_event, {
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
134 instance = instance;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
135
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
136 to = initial_state;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
137 to_attr = state_attr;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
138
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
139 from = self.default_state;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
140 });
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
141 end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
142
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
143 return instance;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
144 end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
145
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
146 function fsm_methods:is_instance(o)
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
147 local mt = getmetatable(o);
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
148 return mt == self._instance_mt;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
149 end
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
150
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
151 return {
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
152 new = new;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
153 is_fsm = is_fsm;
8a2f75e38eb2 util.fsm: New utility lib for finite state machines
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
154 };