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Call cancellation hook immediately if already cancelled

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This commit is contained in:
Eryn Lynn 2018-11-09 00:00:40 -05:00
parent cda921e793
commit 601127071c
1 changed files with 5 additions and 1 deletions
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4
lib/init.lua
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@ -170,8 +170,12 @@ function Promise.new(callback, parent)
local function onCancel(cancellationHook)
assert(type(cancellationHook) == "function", "onCancel must be called with a function as its first argument.")
if self._status == Promise.Status.Cancelled then
cancellationHook()
else
self._cancellationHook = cancellationHook
end
end
local _, result = wpcallPacked(callback, resolve, reject, onCancel)
local ok = result[1]