prosody
1f6f05a98fcd
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 @ 12575:1f6f05a98fcd

util-src: Remove Lua 5.1 compat macros Part of #1600
author Kim Alvefur <zash@zash.se>
date Fri, 01 Jul 2022 21:21:21 +0200
parent 11947:073e53b72792
child 12589:39ae08180c81
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
11947
073e53b72792 util.promise: Support delayed promise execution
Kim Alvefur <zash@zash.se>
parents: 11486
diff changeset
81 local next_tick = function (f)
073e53b72792 util.promise: Support delayed promise execution
Kim Alvefur <zash@zash.se>
parents: 11486
diff changeset
82 f();
073e53b72792 util.promise: Support delayed promise execution
Kim Alvefur <zash@zash.se>
parents: 11486
diff changeset
83 end
073e53b72792 util.promise: Support delayed promise execution
Kim Alvefur <zash@zash.se>
parents: 11486
diff changeset
84
9513
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
85 local function new(f)
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
86 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
87 if f then
11947
073e53b72792 util.promise: Support delayed promise execution
Kim Alvefur <zash@zash.se>
parents: 11486
diff changeset
88 next_tick(function()
073e53b72792 util.promise: Support delayed promise execution
Kim Alvefur <zash@zash.se>
parents: 11486
diff changeset
89 local resolve, reject = new_resolve_functions(p);
073e53b72792 util.promise: Support delayed promise execution
Kim Alvefur <zash@zash.se>
parents: 11486
diff changeset
90 local ok, ret = xpcall(f, debug.traceback, resolve, reject);
073e53b72792 util.promise: Support delayed promise execution
Kim Alvefur <zash@zash.se>
parents: 11486
diff changeset
91 if not ok and p._state == "pending" then
073e53b72792 util.promise: Support delayed promise execution
Kim Alvefur <zash@zash.se>
parents: 11486
diff changeset
92 reject(ret);
073e53b72792 util.promise: Support delayed promise execution
Kim Alvefur <zash@zash.se>
parents: 11486
diff changeset
93 end
073e53b72792 util.promise: Support delayed promise execution
Kim Alvefur <zash@zash.se>
parents: 11486
diff changeset
94 end);
9513
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
95 end
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
96 return p;
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
97 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
98
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
99 local function all(promises)
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
100 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
101 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
102 local total = 0;
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
103 for k, v in pairs(promises) do
11485
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
104 if is_promise(v) then
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
105 total = total + 1;
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
106 v:next(function (value)
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
107 results[k] = value;
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
108 settled = settled + 1;
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
109 if settled == total and loop_finished then
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
110 resolve(results);
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
111 end
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
112 end, reject);
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
113 else
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
114 results[k] = v;
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
115 end
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
116 end
11483
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
117 loop_finished = true;
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
118 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
119 resolve(results);
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
120 end
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
121 end);
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
122 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
123
10922
7d3dbb9eb3eb util.promise: Add all_settled, which follows semantics of allSettled from ES2020
Matthew Wild <mwild1@gmail.com>
parents: 9745
diff changeset
124 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
125 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
126 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
127 local total = 0;
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
128 for k, v in pairs(promises) do
11485
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
129 if is_promise(v) then
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
130 total = total + 1;
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
131 v:next(function (value)
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
132 results[k] = { status = "fulfilled", value = value };
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
133 settled = settled + 1;
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
134 if settled == total and loop_finished then
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
135 resolve(results);
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
136 end
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
137 end, function (e)
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
138 results[k] = { status = "rejected", reason = e };
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
139 settled = settled + 1;
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
140 if settled == total and loop_finished then
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
141 resolve(results);
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
142 end
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
143 end);
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
144 else
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
145 results[k] = v;
7d42ed3a8a40 util.promise: all()/all_settled() pass through non-promise values
Matthew Wild <mwild1@gmail.com>
parents: 11484
diff changeset
146 end
10922
7d3dbb9eb3eb util.promise: Add all_settled, which follows semantics of allSettled from ES2020
Matthew Wild <mwild1@gmail.com>
parents: 9745
diff changeset
147 end
11483
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
148 loop_finished = true;
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
149 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
150 resolve(results);
24ce9d380475 util.promise: Add support for arbitrary keys in all()/all_settled()
Matthew Wild <mwild1@gmail.com>
parents: 11211
diff changeset
151 end
10922
7d3dbb9eb3eb util.promise: Add all_settled, which follows semantics of allSettled from ES2020
Matthew Wild <mwild1@gmail.com>
parents: 9745
diff changeset
152 end);
7d3dbb9eb3eb util.promise: Add all_settled, which follows semantics of allSettled from ES2020
Matthew Wild <mwild1@gmail.com>
parents: 9745
diff changeset
153 end
7d3dbb9eb3eb util.promise: Add all_settled, which follows semantics of allSettled from ES2020
Matthew Wild <mwild1@gmail.com>
parents: 9745
diff changeset
154
11486
78d843faaffc util.promise: Switch order of parameters to join()
Matthew Wild <mwild1@gmail.com>
parents: 11485
diff changeset
155 local function join(handler, ...)
11484
a0120e935442 util.promise: Add join() convenience method
Matthew Wild <mwild1@gmail.com>
parents: 11483
diff changeset
156 local promises, n = { ... }, select("#", ...);
a0120e935442 util.promise: Add join() convenience method
Matthew Wild <mwild1@gmail.com>
parents: 11483
diff changeset
157 return all(promises):next(function (results)
11486
78d843faaffc util.promise: Switch order of parameters to join()
Matthew Wild <mwild1@gmail.com>
parents: 11485
diff changeset
158 return handler(unpack(results, 1, n));
11484
a0120e935442 util.promise: Add join() convenience method
Matthew Wild <mwild1@gmail.com>
parents: 11483
diff changeset
159 end);
a0120e935442 util.promise: Add join() convenience method
Matthew Wild <mwild1@gmail.com>
parents: 11483
diff changeset
160 end
a0120e935442 util.promise: Add join() convenience method
Matthew Wild <mwild1@gmail.com>
parents: 11483
diff changeset
161
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
162 local function race(promises)
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
163 return new(function (resolve, reject)
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
164 for i = 1, #promises do
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
165 promises[i]:next(resolve, reject);
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
166 end
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
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
170 local function resolve(v)
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
171 return new(function (_resolve)
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
172 _resolve(v);
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
173 end);
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
174 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
175
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
176 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
177 return new(function (_, _reject)
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
178 _reject(v);
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
179 end);
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
180 end
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
181
9517
b1c6ede17592 util.promise: Add promise.try()
Matthew Wild <mwild1@gmail.com>
parents: 9515
diff changeset
182 local function try(f)
b1c6ede17592 util.promise: Add promise.try()
Matthew Wild <mwild1@gmail.com>
parents: 9515
diff changeset
183 return resolve():next(function () return f(); end);
b1c6ede17592 util.promise: Add promise.try()
Matthew Wild <mwild1@gmail.com>
parents: 9515
diff changeset
184 end
b1c6ede17592 util.promise: Add promise.try()
Matthew Wild <mwild1@gmail.com>
parents: 9515
diff changeset
185
9513
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
186 function promise_methods:next(on_fulfilled, on_rejected)
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
187 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
188 self:_next(on_fulfilled, on_rejected, resolve, reject);
9513
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
189 end);
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
190 end
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
191
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
192 function promise_methods:catch(on_rejected)
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
193 return self:next(nil, on_rejected);
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
194 end
4f4f9823bd1d util.promise: Some code relocation
Matthew Wild <mwild1@gmail.com>
parents: 9512
diff changeset
195
9514
9db707a86a25 util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents: 9513
diff changeset
196 function promise_methods:finally(on_finally)
9db707a86a25 util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents: 9513
diff changeset
197 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
198 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
199 return self:next(_on_finally, _on_catch_finally);
9db707a86a25 util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents: 9513
diff changeset
200 end
9db707a86a25 util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents: 9513
diff changeset
201
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
202 return {
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
203 new = new;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
204 resolve = resolve;
11484
a0120e935442 util.promise: Add join() convenience method
Matthew Wild <mwild1@gmail.com>
parents: 11483
diff changeset
205 join = join;
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
206 reject = reject;
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
207 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
208 all_settled = all_settled;
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
209 race = race;
9517
b1c6ede17592 util.promise: Add promise.try()
Matthew Wild <mwild1@gmail.com>
parents: 9515
diff changeset
210 try = try;
9548
a83afc22e9d7 util.promise: Export is_promise()
Matthew Wild <mwild1@gmail.com>
parents: 9546
diff changeset
211 is_promise = is_promise;
11947
073e53b72792 util.promise: Support delayed promise execution
Kim Alvefur <zash@zash.se>
parents: 11486
diff changeset
212 set_nexttick = function(new_next_tick) next_tick = new_next_tick; end;
9456
d54a0e129af8 util.promise: ES6-like API for promises
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
213 }