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22 lines
624 B
TypeScript
22 lines
624 B
TypeScript
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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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/** Assertion error class for node compat layer's internal code. */
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export class NodeCompatAssertionError extends Error {
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constructor(message: string) {
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super(message);
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this.name = "NodeCompatAssertionError";
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}
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}
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/** Make an assertion, if not `true`, then throw. */
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export function assert(expr: unknown, msg = ""): asserts expr {
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if (!expr) {
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throw new NodeCompatAssertionError(msg);
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}
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}
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/** Use this to assert unreachable code. */
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export function unreachable(): never {
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throw new NodeCompatAssertionError("unreachable");
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}
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