mirror of
https://github.com/denoland/deno.git
synced 2024-12-14 19:37:59 -05:00
22 lines
624 B
TypeScript
22 lines
624 B
TypeScript
|
// 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");
|
||
|
}
|