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