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azuredatastudio/extensions/sql-database-projects/src/common/promise.ts
2021-10-28 13:51:48 -07:00

26 lines
1.1 KiB
TypeScript

/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the Source EULA. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
/**
* Deferred promise
*/
export class Deferred<T = void> {
promise: Promise<T>;
resolve!: (value: T | PromiseLike<T>) => void;
reject!: (reason?: any) => void;
constructor() {
this.promise = new Promise<T>((resolve, reject) => {
this.resolve = resolve;
this.reject = reject;
});
}
then<TResult>(onfulfilled?: (value: T) => TResult | Thenable<TResult>, onrejected?: (reason: any) => TResult | Thenable<TResult>): Thenable<TResult>;
then<TResult>(onfulfilled?: (value: T) => TResult | Thenable<TResult>, onrejected?: (reason: any) => void): Thenable<TResult>;
then<TResult>(onfulfilled?: (value: T) => TResult | Thenable<TResult>, onrejected?: (reason: any) => TResult | Thenable<TResult>): Thenable<TResult> {
return this.promise.then(onfulfilled, onrejected);
}
}