prosody
9d20fca6a485
util/promise.lua

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

Software / code / prosody

Annotate

util/promise.lua @ 10369:9d20fca6a485

prosodyctl: Print friendly version of error messages
author Kim Alvefur <zash@zash.se>
date Fri, 01 Nov 2019 23:16:58 +0100
parent 9745:0dbb285f903e
child 10922:7d3dbb9eb3eb
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
1 local promise_methods = {};
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
2 local promise_mt = { __name = "promise", __index = promise_methods };
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
3
9562
acf74ad0b795 Many things: switch from hacky multi-arg xpcall implementations to a standard util.xpcall
Matthew Wild <mwild1@gmail.com>
parents: 9559
diff changeset
4 local xpcall = require "util.xpcall".xpcall;
acf74ad0b795 Many things: switch from hacky multi-arg xpcall implementations to a standard util.xpcall
Matthew Wild <mwild1@gmail.com>
parents: 9559
diff changeset
5
9515
2571c65b972f util.promise: Add a string representation
Kim Alvefur <zash@zash.se>
parents: 9514
diff changeset
6 function promise_mt:__tostring()
2571c65b972f util.promise: Add a string representation
Kim Alvefur <zash@zash.se>
parents: 9514
diff changeset
7 return "promise (" .. (self._state or "invalid") .. ")";
2571c65b972f util.promise: Add a string representation
Kim Alvefur <zash@zash.se>
parents: 9514
diff changeset
8 end
2571c65b972f util.promise: Add a string representation
Kim Alvefur <zash@zash.se>
parents: 9514
diff changeset
9
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
10 local function is_promise(o)
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
11 local mt = getmetatable(o);
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
12 return mt == promise_mt;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
13 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
14
9549
800c274928bf util.promise: Ensure chained promises always receive a value/rejection even if an intermediate promise has no handlers
Matthew Wild <mwild1@gmail.com>
parents: 9548
diff changeset
15 local function wrap_handler(f, resolve, reject, default)
800c274928bf util.promise: Ensure chained promises always receive a value/rejection even if an intermediate promise has no handlers
Matthew Wild <mwild1@gmail.com>
parents: 9548
diff changeset
16 if not f then
800c274928bf util.promise: Ensure chained promises always receive a value/rejection even if an intermediate promise has no handlers
Matthew Wild <mwild1@gmail.com>
parents: 9548
diff changeset
17 return default;
800c274928bf util.promise: Ensure chained promises always receive a value/rejection even if an intermediate promise has no handlers
Matthew Wild <mwild1@gmail.com>
parents: 9548
diff changeset
18 end
800c274928bf util.promise: Ensure chained promises always receive a value/rejection even if an intermediate promise has no handlers
Matthew Wild <mwild1@gmail.com>
parents: 9548
diff changeset
19 return function (param)
9559
7c65e3f38e6e util.promise: Switch from pcall to xpcall to get tracebacks on exceptions
Matthew Wild <mwild1@gmail.com>
parents: 9558
diff changeset
20 local ok, ret = xpcall(f, debug.traceback, param);
9549
800c274928bf util.promise: Ensure chained promises always receive a value/rejection even if an intermediate promise has no handlers
Matthew Wild <mwild1@gmail.com>
parents: 9548
diff changeset
21 if ok then
800c274928bf util.promise: Ensure chained promises always receive a value/rejection even if an intermediate promise has no handlers
Matthew Wild <mwild1@gmail.com>
parents: 9548
diff changeset
22 resolve(ret);
800c274928bf util.promise: Ensure chained promises always receive a value/rejection even if an intermediate promise has no handlers
Matthew Wild <mwild1@gmail.com>
parents: 9548
diff changeset
23 else
800c274928bf util.promise: Ensure chained promises always receive a value/rejection even if an intermediate promise has no handlers
Matthew Wild <mwild1@gmail.com>
parents: 9548
diff changeset
24 reject(ret);
800c274928bf util.promise: Ensure chained promises always receive a value/rejection even if an intermediate promise has no handlers
Matthew Wild <mwild1@gmail.com>
parents: 9548
diff changeset
25 end
800c274928bf util.promise: Ensure chained promises always receive a value/rejection even if an intermediate promise has no handlers
Matthew Wild <mwild1@gmail.com>
parents: 9548
diff changeset
26 return true;
800c274928bf util.promise: Ensure chained promises always receive a value/rejection even if an intermediate promise has no handlers
Matthew Wild <mwild1@gmail.com>
parents: 9548
diff changeset
27 end;
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
28 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
29
9549
800c274928bf util.promise: Ensure chained promises always receive a value/rejection even if an intermediate promise has no handlers
Matthew Wild <mwild1@gmail.com>
parents: 9548
diff changeset
30 local function next_pending(self, on_fulfilled, on_rejected, resolve, reject)
800c274928bf util.promise: Ensure chained promises always receive a value/rejection even if an intermediate promise has no handlers
Matthew Wild <mwild1@gmail.com>
parents: 9548
diff changeset
31 table.insert(self._pending_on_fulfilled, wrap_handler(on_fulfilled, resolve, reject, resolve));
800c274928bf util.promise: Ensure chained promises always receive a value/rejection even if an intermediate promise has no handlers
Matthew Wild <mwild1@gmail.com>
parents: 9548
diff changeset
32 table.insert(self._pending_on_rejected, wrap_handler(on_rejected, resolve, reject, reject));
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
33 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
34
9549
800c274928bf util.promise: Ensure chained promises always receive a value/rejection even if an intermediate promise has no handlers
Matthew Wild <mwild1@gmail.com>
parents: 9548
diff changeset
35 local function next_fulfilled(promise, on_fulfilled, on_rejected, resolve, reject) -- luacheck: ignore 212/on_rejected
9550
98de4c2e2627 util.promise: Fix missing parameters
Matthew Wild <mwild1@gmail.com>
parents: 9549
diff changeset
36 wrap_handler(on_fulfilled, resolve, reject, resolve)(promise.value);
9549
800c274928bf util.promise: Ensure chained promises always receive a value/rejection even if an intermediate promise has no handlers
Matthew Wild <mwild1@gmail.com>
parents: 9548
diff changeset
37 end
800c274928bf util.promise: Ensure chained promises always receive a value/rejection even if an intermediate promise has no handlers
Matthew Wild <mwild1@gmail.com>
parents: 9548
diff changeset
38
800c274928bf util.promise: Ensure chained promises always receive a value/rejection even if an intermediate promise has no handlers
Matthew Wild <mwild1@gmail.com>
parents: 9548
diff changeset
39 local function next_rejected(promise, on_fulfilled, on_rejected, resolve, reject) -- luacheck: ignore 212/on_fulfilled
9550
98de4c2e2627 util.promise: Fix missing parameters
Matthew Wild <mwild1@gmail.com>
parents: 9549
diff changeset
40 wrap_handler(on_rejected, resolve, reject, reject)(promise.reason);
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
41 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
42
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
43 local function promise_settle(promise, new_state, new_next, cbs, value)
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
44 if promise._state ~= "pending" then
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
45 return;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
46 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
47 promise._state = new_state;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
48 promise._next = new_next;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
49 for _, cb in ipairs(cbs) do
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
50 cb(value);
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
51 end
9745
0dbb285f903e util.promise: Remove references to callbacks after settling promise
Kim Alvefur <zash@zash.se>
parents: 9562
diff changeset
52 -- No need to keep references to callbacks
0dbb285f903e util.promise: Remove references to callbacks after settling promise
Kim Alvefur <zash@zash.se>
parents: 9562
diff changeset
53 promise._pending_on_fulfilled = nil;
0dbb285f903e util.promise: Remove references to callbacks after settling promise
Kim Alvefur <zash@zash.se>
parents: 9562
diff changeset
54 promise._pending_on_rejected = nil;
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
55 return true;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
56 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
57
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
58 local function new_resolve_functions(p)
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
59 local resolved = false;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
60 local function _resolve(v)
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
61 if resolved then return; end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
62 resolved = true;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
63 if is_promise(v) then
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
64 v:next(new_resolve_functions(p));
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
65 elseif promise_settle(p, "fulfilled", next_fulfilled, p._pending_on_fulfilled, v) then
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
66 p.value = v;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
67 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
68
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
69 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
70 local function _reject(e)
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
71 if resolved then return; end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
72 resolved = true;
9558
5fa73fbb047f util.promise: Remove the non-standard ability to pass a promise to reject()
Matthew Wild <mwild1@gmail.com>
parents: 9550
diff changeset
73 if promise_settle(p, "rejected", next_rejected, p._pending_on_rejected, e) then
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
74 p.reason = e;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
75 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
76 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
77 return _resolve, _reject;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
78 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
79
9513
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
80 local function new(f)
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
81 local p = setmetatable({ _state = "pending", _next = next_pending, _pending_on_fulfilled = {}, _pending_on_rejected = {} }, promise_mt);
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
82 if f then
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
83 local resolve, reject = new_resolve_functions(p);
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
84 local ok, ret = pcall(f, resolve, reject);
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
85 if not ok and p._state == "pending" then
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
86 reject(ret);
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
87 end
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
88 end
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
89 return p;
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
90 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
91
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
92 local function all(promises)
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
93 return new(function (resolve, reject)
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
94 local count, total, results = 0, #promises, {};
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
95 for i = 1, total do
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
96 promises[i]:next(function (v)
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
97 results[i] = v;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
98 count = count + 1;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
99 if count == total then
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
100 resolve(results);
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
101 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
102 end, reject);
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
103 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
104 end);
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
105 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
106
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
107 local function race(promises)
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
108 return new(function (resolve, reject)
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
109 for i = 1, #promises do
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
110 promises[i]:next(resolve, reject);
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
111 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
112 end);
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
113 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
114
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
115 local function resolve(v)
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
116 return new(function (_resolve)
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
117 _resolve(v);
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
118 end);
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
119 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
120
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
121 local function reject(v)
9510
8ef46d09386a util.promise: Fix promise.reject() to return a rejected promise, and fix buggy test for it
Matthew Wild <mwild1@gmail.com>
parents: 9456
diff changeset
122 return new(function (_, _reject)
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
123 _reject(v);
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
124 end);
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
125 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
126
9517
b1c6ede17592 util.promise: Add promise.try()
Matthew Wild <mwild1@gmail.com>
parents: 9515
diff changeset
127 local function try(f)
b1c6ede17592 util.promise: Add promise.try()
Matthew Wild <mwild1@gmail.com>
parents: 9515
diff changeset
128 return resolve():next(function () return f(); end);
b1c6ede17592 util.promise: Add promise.try()
Matthew Wild <mwild1@gmail.com>
parents: 9515
diff changeset
129 end
b1c6ede17592 util.promise: Add promise.try()
Matthew Wild <mwild1@gmail.com>
parents: 9515
diff changeset
130
9513
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
131 function promise_methods:next(on_fulfilled, on_rejected)
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
132 return new(function (resolve, reject) --luacheck: ignore 431/resolve 431/reject
9549
800c274928bf util.promise: Ensure chained promises always receive a value/rejection even if an intermediate promise has no handlers
Matthew Wild <mwild1@gmail.com>
parents: 9548
diff changeset
133 self:_next(on_fulfilled, on_rejected, resolve, reject);
9513
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
134 end);
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
135 end
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
136
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
137 function promise_methods:catch(on_rejected)
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
138 return self:next(nil, on_rejected);
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
139 end
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
140
9514
9db707a86a25 util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents: 9513
diff changeset
141 function promise_methods:finally(on_finally)
9db707a86a25 util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents: 9513
diff changeset
142 local function _on_finally(value) on_finally(); return value; end
9db707a86a25 util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents: 9513
diff changeset
143 local function _on_catch_finally(err) on_finally(); return reject(err); end
9db707a86a25 util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents: 9513
diff changeset
144 return self:next(_on_finally, _on_catch_finally);
9db707a86a25 util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents: 9513
diff changeset
145 end
9db707a86a25 util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents: 9513
diff changeset
146
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
147 return {
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
148 new = new;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
149 resolve = resolve;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
150 reject = reject;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
151 all = all;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
152 race = race;
9517
b1c6ede17592 util.promise: Add promise.try()
Matthew Wild <mwild1@gmail.com>
parents: 9515
diff changeset
153 try = try;
9548
a83afc22e9d7 util.promise: Export is_promise()
Matthew Wild <mwild1@gmail.com>
parents: 9546
diff changeset
154 is_promise = is_promise;
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
155 }