local __TS__AsyncAwaiter, __TS__Await
do
    local ____coroutine = _G.coroutine or ({})
    local cocreate = ____coroutine.create
    local coresume = ____coroutine.resume
    local costatus = ____coroutine.status
    local coyield = ____coroutine.yield
    function __TS__AsyncAwaiter(generator)
        return __TS__New(
            __TS__Promise,
            function(____, resolve, reject)
                local fulfilled, step, resolved, asyncCoroutine
                function fulfilled(self, value)
                    local success, resultOrError = coresume(asyncCoroutine, value)
                    if success then
                        return step(resultOrError)
                    end
                    return reject(nil, resultOrError)
                end
                function step(result)
                    if resolved then
                        return
                    end
                    if costatus(asyncCoroutine) == "dead" then
                        return resolve(nil, result)
                    end
                    return __TS__Promise.resolve(result):addCallbacks(fulfilled, reject)
                end
                resolved = false
                asyncCoroutine = cocreate(generator)
                local success, resultOrError = coresume(
                    asyncCoroutine,
                    function(____, v)
                        resolved = true
                        return __TS__Promise.resolve(v):addCallbacks(resolve, reject)
                    end
                )
                if success then
                    return step(resultOrError)
                else
                    return reject(nil, resultOrError)
                end
            end
        )
    end
    function __TS__Await(thing)
        return coyield(thing)
    end
end