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denoland-deno/ext/node/polyfills/_util/asserts.ts
Bartek Iwańczuk d47147fb6a
feat(ext/node): embed std/node into the snapshot (#17724)
This commit moves "deno_std/node" in "ext/node" crate. The code is
transpiled and snapshotted during the build process.

During the first pass a minimal amount of work was done to create the
snapshot, a lot of code in "ext/node" depends on presence of "Deno"
global. This code will be gradually fixed in the follow up PRs to migrate
it to import relevant APIs from "internal:" modules.

Currently the code from snapshot is not used in any way, and all
Node/npm compatibility still uses code from 
"https://deno.land/std/node" (or from the location specified by 
"DENO_NODE_COMPAT_URL"). This will also be handled in a follow 
up PRs.

---------

Co-authored-by: crowlkats <crowlkats@toaxl.com>
Co-authored-by: Divy Srivastava <dj.srivastava23@gmail.com>
Co-authored-by: Yoshiya Hinosawa <stibium121@gmail.com>
2023-02-14 17:38:45 +01:00

21 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");
}