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Add type assertion to onCancel

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Eryn Lynn 2018-10-24 03:10:20 -04:00
parent dbcad4ab4b
commit 4f5ed034e0
1 changed files with 2 additions and 0 deletions
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2
lib/init.lua
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@ -168,6 +168,8 @@ function Promise.new(callback, parent)
end
local function onCancel(cancellationHook)
assert(type(cancellationHook) == "function", "onCancel must be called with a function as its first argument.")
self._cancellationHook = cancellationHook
end