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f5c0188b5e
This adds [Node's `util.callbackify`][0] to `std/node/util.ts`. I lifted most of this from the [original Node source code][1] (and [its tests][2]). I tried to make minimal modifications to the source. I made a few arbitrary decisions: - I was unable to do the function's types elegantly. I made overloads for functions that have 0 to 5 (inclusive) arguments, excluding the callback. I would love to know a better way to do this. (It seems that the folks at DefinitelyTyped [were also stumped][3], though maybe their solution is deliberate.) - There are a few edge cases that cause custom Node errors to be produced. Instead of re-implementing those errors completely, I created simplified classes. These are mostly correct but are not identical to the real Node errors. - The tests implement a possibly-arcane `TestQueue` class. I originally used a lot of inline promises but found it too repetitive. Closes [#5366][4]. [0]: https://nodejs.org/api/util.html#util_util_callbackify_original [1]:4780493301/lib/util.js (L183-L226)[2]:4780493301/test/parallel/test-util-callbackify.js[3]:7d24857ddb/types/node/util.d.ts (L61-L84)[4]: https://github.com/denoland/deno/issues/5366
72 lines
1.8 KiB
TypeScript
72 lines
1.8 KiB
TypeScript
export { callbackify } from "./_util/_util_callbackify.ts";
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export function isArray(value: unknown): boolean {
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return Array.isArray(value);
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}
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export function isBoolean(value: unknown): boolean {
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return typeof value === "boolean" || value instanceof Boolean;
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}
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export function isNull(value: unknown): boolean {
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return value === null;
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}
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export function isNullOrUndefined(value: unknown): boolean {
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return value === null || value === undefined;
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}
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export function isNumber(value: unknown): boolean {
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return typeof value === "number" || value instanceof Number;
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}
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export function isString(value: unknown): boolean {
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return typeof value === "string" || value instanceof String;
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}
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export function isSymbol(value: unknown): boolean {
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return typeof value === "symbol";
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}
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export function isUndefined(value: unknown): boolean {
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return value === undefined;
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}
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export function isObject(value: unknown): boolean {
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return value !== null && typeof value === "object";
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}
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export function isError(e: unknown): boolean {
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return e instanceof Error;
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}
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export function isFunction(value: unknown): boolean {
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return typeof value === "function";
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}
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export function isRegExp(value: unknown): boolean {
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return value instanceof RegExp;
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}
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export function isPrimitive(value: unknown): boolean {
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return (
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value === null || (typeof value !== "object" && typeof value !== "function")
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);
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}
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export function validateIntegerRange(
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value: number,
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name: string,
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min = -2147483648,
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max = 2147483647
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): void {
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// The defaults for min and max correspond to the limits of 32-bit integers.
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if (!Number.isInteger(value)) {
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throw new Error(`${name} must be 'an integer' but was ${value}`);
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}
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if (value < min || value > max) {
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throw new Error(
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`${name} must be >= ${min} && <= ${max}. Value was ${value}`
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);
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}
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}
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