prosody
a0120e935442
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 @ 11484:a0120e935442

util.promise: Add join() convenience method Usage: promise.join(p1, p2, function (result1, result2) [...] end)
author Matthew Wild <mwild1@gmail.com>
date Thu, 25 Mar 2021 14:28:38 +0000
parent 11483:24ce9d380475
child 11485:7d42ed3a8a40
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;
11484
a0120e935442 util.promise: Add join() convenience method
Matthew Wild <mwild1@gmail.com>
parents: 11483
diff changeset
5 local unpack = table.unpack or unpack; --luacheck: ignore 113
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
6
9515
2571c65b972f util.promise: Add a string representation
Kim Alvefur <zash@zash.se>
parents: 9514
diff changeset
7 function promise_mt:__tostring()
2571c65b972f util.promise: Add a string representation
Kim Alvefur <zash@zash.se>
parents: 9514
diff changeset
8 return "promise (" .. (self._state or "invalid") .. ")";
2571c65b972f util.promise: Add a string representation
Kim Alvefur <zash@zash.se>
parents: 9514
diff changeset
9 end
2571c65b972f util.promise: Add a string representation
Kim Alvefur <zash@zash.se>
parents: 9514
diff changeset
10
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
11 local function is_promise(o)
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
12 local mt = getmetatable(o);
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
13 return mt == promise_mt;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
14 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
15
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
16 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
17 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
18 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
19 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
20 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
21 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
22 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
23 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
24 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
25 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
26 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
27 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
28 end;
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
29 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
30
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
31 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
32 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
33 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
34 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
35
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
36 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
37 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
38 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
39
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
40 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
41 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
42 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
43
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
44 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
45 if promise._state ~= "pending" then
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
46 return;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
47 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
48 promise._state = new_state;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
49 promise._next = new_next;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
50 for _, cb in ipairs(cbs) do
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
51 cb(value);
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
52 end
9745
0dbb285f903e util.promise: Remove references to callbacks after settling promise
Kim Alvefur <zash@zash.se>
parents: 9562
diff changeset
53 -- 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
54 promise._pending_on_fulfilled = nil;
0dbb285f903e util.promise: Remove references to callbacks after settling promise
Kim Alvefur <zash@zash.se>
parents: 9562
diff changeset
55 promise._pending_on_rejected = nil;
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
56 return true;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
57 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
58
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
59 local function new_resolve_functions(p)
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
60 local resolved = false;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
61 local function _resolve(v)
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
62 if resolved then return; end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
63 resolved = true;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
64 if is_promise(v) then
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
65 v:next(new_resolve_functions(p));
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
66 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
67 p.value = v;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
68 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
69
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
70 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
71 local function _reject(e)
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
72 if resolved then return; end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
73 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
74 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
75 p.reason = e;
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 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
78 return _resolve, _reject;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
79 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
80
9513
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
81 local function new(f)
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
82 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
83 if f then
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
84 local resolve, reject = new_resolve_functions(p);
11210
75636bf13bf0 util.promise: Use xpcall() for promise function to preserve tracebacks
Matthew Wild <mwild1@gmail.com>
parents: 9562
diff changeset
85 local ok, ret = xpcall(f, debug.traceback, resolve, reject);
9513
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
86 if not ok and p._state == "pending" then
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
87 reject(ret);
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 end
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
90 return p;
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
91 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
92
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
93 local function all(promises)
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
94 return new(function (resolve, reject)
11483
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
95 local settled, results, loop_finished = 0, {}, false;
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
96 local total = 0;
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
97 for k, v in pairs(promises) do
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
98 total = total + 1;
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
99 v:next(function (value)
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
100 results[k] = value;
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
101 settled = settled + 1;
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
102 if settled == total and loop_finished then
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
103 resolve(results);
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, reject);
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
106 end
11483
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
107 loop_finished = true;
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
108 if settled == total then
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
109 resolve(results);
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
110 end
9456
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
10922
7d3dbb9eb3eb util.promise: Add all_settled, which follows semantics of allSettled from ES2020
Matthew Wild <mwild1@gmail.com>
parents: 9745
diff changeset
114 local function all_settled(promises)
7d3dbb9eb3eb util.promise: Add all_settled, which follows semantics of allSettled from ES2020
Matthew Wild <mwild1@gmail.com>
parents: 9745
diff changeset
115 return new(function (resolve)
11483
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
116 local settled, results, loop_finished = 0, {}, false;
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
117 local total = 0;
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
118 for k, v in pairs(promises) do
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
119 total = total + 1;
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
120 v:next(function (value)
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
121 results[k] = { status = "fulfilled", value = value };
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
122 settled = settled + 1;
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
123 if settled == total and loop_finished then
10922
7d3dbb9eb3eb util.promise: Add all_settled, which follows semantics of allSettled from ES2020
Matthew Wild <mwild1@gmail.com>
parents: 9745
diff changeset
124 resolve(results);
7d3dbb9eb3eb util.promise: Add all_settled, which follows semantics of allSettled from ES2020
Matthew Wild <mwild1@gmail.com>
parents: 9745
diff changeset
125 end
7d3dbb9eb3eb util.promise: Add all_settled, which follows semantics of allSettled from ES2020
Matthew Wild <mwild1@gmail.com>
parents: 9745
diff changeset
126 end, function (e)
11483
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
127 results[k] = { status = "rejected", reason = e };
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
128 settled = settled + 1;
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
129 if settled == total and loop_finished then
10922
7d3dbb9eb3eb util.promise: Add all_settled, which follows semantics of allSettled from ES2020
Matthew Wild <mwild1@gmail.com>
parents: 9745
diff changeset
130 resolve(results);
7d3dbb9eb3eb util.promise: Add all_settled, which follows semantics of allSettled from ES2020
Matthew Wild <mwild1@gmail.com>
parents: 9745
diff changeset
131 end
7d3dbb9eb3eb util.promise: Add all_settled, which follows semantics of allSettled from ES2020
Matthew Wild <mwild1@gmail.com>
parents: 9745
diff changeset
132 end);
7d3dbb9eb3eb util.promise: Add all_settled, which follows semantics of allSettled from ES2020
Matthew Wild <mwild1@gmail.com>
parents: 9745
diff changeset
133 end
11483
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
134 loop_finished = true;
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
135 if settled == total then
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
136 resolve(results);
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
137 end
10922
7d3dbb9eb3eb util.promise: Add all_settled, which follows semantics of allSettled from ES2020
Matthew Wild <mwild1@gmail.com>
parents: 9745
diff changeset
138 end);
7d3dbb9eb3eb util.promise: Add all_settled, which follows semantics of allSettled from ES2020
Matthew Wild <mwild1@gmail.com>
parents: 9745
diff changeset
139 end
7d3dbb9eb3eb util.promise: Add all_settled, which follows semantics of allSettled from ES2020
Matthew Wild <mwild1@gmail.com>
parents: 9745
diff changeset
140
11484
a0120e935442 util.promise: Add join() convenience method
Matthew Wild <mwild1@gmail.com>
parents: 11483
diff changeset
141 local function join(...)
a0120e935442 util.promise: Add join() convenience method
Matthew Wild <mwild1@gmail.com>
parents: 11483
diff changeset
142 local promises, n = { ... }, select("#", ...);
a0120e935442 util.promise: Add join() convenience method
Matthew Wild <mwild1@gmail.com>
parents: 11483
diff changeset
143 local handler = promises[n];
a0120e935442 util.promise: Add join() convenience method
Matthew Wild <mwild1@gmail.com>
parents: 11483
diff changeset
144 promises[n] = nil;
a0120e935442 util.promise: Add join() convenience method
Matthew Wild <mwild1@gmail.com>
parents: 11483
diff changeset
145 return all(promises):next(function (results)
a0120e935442 util.promise: Add join() convenience method
Matthew Wild <mwild1@gmail.com>
parents: 11483
diff changeset
146 return handler(unpack(results, 1, n - 1));
a0120e935442 util.promise: Add join() convenience method
Matthew Wild <mwild1@gmail.com>
parents: 11483
diff changeset
147 end);
a0120e935442 util.promise: Add join() convenience method
Matthew Wild <mwild1@gmail.com>
parents: 11483
diff changeset
148 end
a0120e935442 util.promise: Add join() convenience method
Matthew Wild <mwild1@gmail.com>
parents: 11483
diff changeset
149
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
150 local function race(promises)
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
151 return new(function (resolve, reject)
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
152 for i = 1, #promises do
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
153 promises[i]:next(resolve, reject);
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
154 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
155 end);
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
156 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
157
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
158 local function resolve(v)
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
159 return new(function (_resolve)
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
160 _resolve(v);
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
161 end);
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
162 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
163
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
164 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
165 return new(function (_, _reject)
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
166 _reject(v);
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
167 end);
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
168 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
169
9517
b1c6ede17592 util.promise: Add promise.try()
Matthew Wild <mwild1@gmail.com>
parents: 9515
diff changeset
170 local function try(f)
b1c6ede17592 util.promise: Add promise.try()
Matthew Wild <mwild1@gmail.com>
parents: 9515
diff changeset
171 return resolve():next(function () return f(); end);
b1c6ede17592 util.promise: Add promise.try()
Matthew Wild <mwild1@gmail.com>
parents: 9515
diff changeset
172 end
b1c6ede17592 util.promise: Add promise.try()
Matthew Wild <mwild1@gmail.com>
parents: 9515
diff changeset
173
9513
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
174 function promise_methods:next(on_fulfilled, on_rejected)
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
175 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
176 self:_next(on_fulfilled, on_rejected, resolve, reject);
9513
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
177 end);
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
178 end
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
179
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
180 function promise_methods:catch(on_rejected)
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
181 return self:next(nil, on_rejected);
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
182 end
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
183
9514
9db707a86a25 util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents: 9513
diff changeset
184 function promise_methods:finally(on_finally)
9db707a86a25 util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents: 9513
diff changeset
185 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
186 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
187 return self:next(_on_finally, _on_catch_finally);
9db707a86a25 util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents: 9513
diff changeset
188 end
9db707a86a25 util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents: 9513
diff changeset
189
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
190 return {
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
191 new = new;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
192 resolve = resolve;
11484
a0120e935442 util.promise: Add join() convenience method
Matthew Wild <mwild1@gmail.com>
parents: 11483
diff changeset
193 join = join;
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
194 reject = reject;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
195 all = all;
10922
7d3dbb9eb3eb util.promise: Add all_settled, which follows semantics of allSettled from ES2020
Matthew Wild <mwild1@gmail.com>
parents: 9745
diff changeset
196 all_settled = all_settled;
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
197 race = race;
9517
b1c6ede17592 util.promise: Add promise.try()
Matthew Wild <mwild1@gmail.com>
parents: 9515
diff changeset
198 try = try;
9548
a83afc22e9d7 util.promise: Export is_promise()
Matthew Wild <mwild1@gmail.com>
parents: 9546
diff changeset
199 is_promise = is_promise;
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
200 }