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util.promise: Add all_settled, which follows semantics of allSettled from ES2020

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Matthew Wild 2020-06-08 14:01:02 +01:00
parent 625ec0a93f
commit 9e0186b0ed
2 changed files with 76 additions and 0 deletions
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22
util/promise.lua
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@ -104,6 +104,27 @@ local function all(promises)
end);
end
local function all_settled(promises)
return new(function (resolve)
local count, total, results = 0, #promises, {};
for i = 1, total do
promises[i]:next(function (v)
results[i] = { status = "fulfilled", value = v };
count = count + 1;
if count == total then
resolve(results);
end
end, function (e)
results[i] = { status = "rejected", reason = e };
count = count + 1;
if count == total then
resolve(results);
end
end);
end
end);
end
local function race(promises)
return new(function (resolve, reject)
for i = 1, #promises do
@ -149,6 +170,7 @@ return {
resolve = resolve;
reject = reject;
all = all;
all_settled = all_settled;
race = race;
try = try;
is_promise = is_promise;