37 lines
1003 B
TypeScript
37 lines
1003 B
TypeScript
/*
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Copyright 2019 Florian Dold
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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or implied. See the License for the specific language governing
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permissions and limitations under the License.
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*/
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export function openPromise<T>(): {
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promise: Promise<T>;
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resolve: (v?: T | PromiseLike<T>) => void;
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reject: (err?: any) => void;
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} {
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let resolve;
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let reject;
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const promise = new Promise<T>((resolve2, reject2) => {
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resolve = resolve2;
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reject = reject2;
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});
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if (!resolve) {
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throw Error("broken invariant");
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}
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if (!reject) {
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throw Error("broken invariant");
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}
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return { promise, resolve, reject };
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}
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