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Unified Diff: src/js/promise.js

Issue 1895603002: [esnext] prototype runtime implementation for async functions (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@AsyncFunction
Patch Set: majorly improve stack traces, get rid of self-spawning behaviour, create inner generator function Created 4 years, 8 months ago
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Index: src/js/promise.js
diff --git a/src/js/promise.js b/src/js/promise.js
index bcf826a10151d48a498d40e72f418805a5022f18..719ecdc48fab72a03ed2d79293eb11a6917d64c1 100644
--- a/src/js/promise.js
+++ b/src/js/promise.js
@@ -268,6 +268,19 @@ function PromiseRejected(r) {
}
}
+// Shortcut Promise.reject and Promise.resolve() implementations, used by
+// Async Functions implementation.
+function PromiseCreateRejected(r) {
+ var promise = PromiseCreateAndSet(-1, r);
+ %PromiseRejectEvent(promise, r, false);
+ return promise;
+}
+
+function PromiseCreateResolved(x) {
+ if (IsPromise(x) && x.constructor === GlobalPromise) return x;
+ return PromiseCreateAndSet(+1, x);
+}
+
// Multi-unwrapped chaining with thenable coercion.
function PromiseThen(onResolve, onReject) {
@@ -451,6 +464,7 @@ utils.InstallFunctions(GlobalPromise.prototype, DONT_ENUM, [
"promise_reject", PromiseReject,
"promise_resolve", PromiseResolve,
"promise_then", PromiseThen,
+ "promise_create_rejected", PromiseCreateRejected
]);
// This allows extras to create promises quickly without building extra
@@ -470,6 +484,10 @@ utils.Export(function(to) {
to.PromiseChain = PromiseChain;
to.PromiseDeferred = PromiseDeferred;
to.PromiseResolved = PromiseResolved;
+
+ to.PromiseCreateRejected = PromiseCreateRejected;
+ to.PromiseCreateResolved = PromiseCreateResolved;
+ to.PromiseThen = PromiseThen;
});
})
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