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