mirror of
https://github.com/denoland/deno.git
synced 2024-11-14 16:33:45 -05:00
8090fb252b
Originally we planned to have a JS class for each error code. But it seems better to just have a single DenoError class with a "kind" property. One nice thing about using an enum instead of classes for errors is that switch() can be used during error handling instead of a bunch of instanceof branches.
27 lines
650 B
TypeScript
27 lines
650 B
TypeScript
import * as fbs from "gen/msg_generated";
|
|
export { ErrorKind } from "gen/msg_generated";
|
|
|
|
// @internal
|
|
export class DenoError<T extends fbs.ErrorKind> extends Error {
|
|
constructor(readonly kind: T, msg: string) {
|
|
super(msg);
|
|
this.name = fbs.ErrorKind[kind];
|
|
}
|
|
}
|
|
|
|
// @internal
|
|
export function maybeThrowError(base: fbs.Base): void {
|
|
const err = maybeError(base);
|
|
if (err != null) {
|
|
throw err;
|
|
}
|
|
}
|
|
|
|
export function maybeError(base: fbs.Base): null | DenoError<fbs.ErrorKind> {
|
|
const kind = base.errorKind();
|
|
if (kind === fbs.ErrorKind.NoError) {
|
|
return null;
|
|
} else {
|
|
return new DenoError(kind, base.error()!);
|
|
}
|
|
}
|