surma
d44f1d9677
Checkpoint before integration and package validation. Assisted-by: SurmAgent:unknown [read] [edit] [bash]
59 lines
1.1 KiB
JavaScript
59 lines
1.1 KiB
JavaScript
function deferred() {
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let resolve
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const promise = new Promise(f => {
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resolve = f
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})
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return { promise, resolve }
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}
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let it, a, b, c
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let getterHit = 0
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let inGetter = false
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Object.defineProperty(Object.prototype, "then", {
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configurable: true,
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get() {
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if (inGetter || !it) return undefined
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inGetter = true
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try {
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if (getterHit === 0) {
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it.return(0)
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} else if (getterHit === 1) {
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it.next(1)
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it.return(1)
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}
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getterHit++
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} catch (_) {
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}
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inGetter = false
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return undefined
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},
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})
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async function* g() {
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try {
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await a.promise
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yield 1
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await b.promise
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yield 2
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await c.promise
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} finally {
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await c.promise
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}
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}
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(async () => {
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a = deferred()
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b = deferred()
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c = deferred()
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it = g()
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it.next()
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a.resolve({})
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await Promise.resolve()
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await Promise.resolve()
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b.resolve({})
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c.resolve({})
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await Promise.resolve()
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})()
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