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80 lines
1.9 KiB
TypeScript
80 lines
1.9 KiB
TypeScript
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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let logDebug = false;
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let logSource = "JS";
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// @internal
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export function setLogDebug(debug: boolean, source?: string): void {
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logDebug = debug;
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if (source) {
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logSource = source;
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}
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}
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export function log(...args: unknown[]): void {
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if (logDebug) {
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// if we destructure `console` off `globalThis` too early, we don't bind to
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// the right console, therefore we don't log anything out.
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globalThis.console.log(`DEBUG ${logSource} -`, ...args);
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}
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}
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// @internal
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export class AssertionError extends Error {
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constructor(msg?: string) {
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super(msg);
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this.name = "AssertionError";
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}
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}
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// @internal
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export function assert(cond: unknown, msg = "Assertion failed."): asserts cond {
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if (!cond) {
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throw new AssertionError(msg);
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}
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}
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export type ResolveFunction<T> = (value?: T | PromiseLike<T>) => void;
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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export type RejectFunction = (reason?: any) => void;
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export interface ResolvableMethods<T> {
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resolve: ResolveFunction<T>;
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reject: RejectFunction;
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}
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// @internal
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export type Resolvable<T> = Promise<T> & ResolvableMethods<T>;
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// @internal
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export function createResolvable<T>(): Resolvable<T> {
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let resolve: ResolveFunction<T>;
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let reject: RejectFunction;
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const promise = new Promise<T>((res, rej): void => {
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resolve = res;
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reject = rej;
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}) as Resolvable<T>;
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promise.resolve = resolve!;
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promise.reject = reject!;
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return promise;
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}
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// @internal
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export function notImplemented(): never {
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throw new Error("not implemented");
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}
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// @internal
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export function immutableDefine(
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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o: any,
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p: string | number | symbol,
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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value: any
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): void {
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Object.defineProperty(o, p, {
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value,
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configurable: false,
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writable: false,
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});
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}
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