* feat: 🎸 add @kbn/utility-types * feat: 🎸 improve @kbn/utility-types * chore: 🤖 move @kbn/utility-types to dev deps * chore: 🤖 change @kbn/utility-types build setup * fix: 🐛 implement review suggestions * feat: 🎸 add ShallowPromise type * Update packages/kbn-utility-types/README.md Co-Authored-By: Luke Elmers <lukeelmers@gmail.com> * test: 💍 add tests for utility-types * chore: 🤖 add utility-types tests to TypeScript config * test: 💍 remove negative tests to not cause TypeScript fail * chore: 🤖 remove ref to type defs to try fix CI tests * Update packages/kbn-utility-types/index.ts Co-Authored-By: Spencer <email@spalger.com> * chore: 🤖 add TS types index to fix `grunt run:test_projects` * chore: 🤖 use similar tsconfig.json as in other packages * chore: 🤖 add "clean" script * chore: 🤖 add kbn:bootstrap script
44 lines
1.5 KiB
TypeScript
44 lines
1.5 KiB
TypeScript
/*
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* Licensed to Elasticsearch B.V. under one or more contributor
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* license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright
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* ownership. Elasticsearch B.V. licenses this file to you under
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* the Apache License, Version 2.0 (the "License"); you may
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* 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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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import { PromiseType } from 'utility-types';
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/**
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* Returns wrapped type of a promise.
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*/
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export type UnwrapPromise<T extends Promise<any>> = PromiseType<T>;
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/**
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* Minimal interface for an object resembling an `Observable`.
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*/
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export interface ObservableLike<T> {
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subscribe(observer: (value: T) => void): void;
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}
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/**
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* Returns wrapped type of an observable.
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*/
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export type UnwrapObservable<T extends ObservableLike<any>> = T extends ObservableLike<infer U>
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? U
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: never;
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/**
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* Converts a type to a `Promise`, unless it is already a `Promise`. Useful when proxying the return value of a possibly async function.
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*/
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export type ShallowPromise<T> = T extends Promise<infer U> ? Promise<U> : Promise<T>;
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