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denoland-deno/js/errors.ts
2018-10-07 22:52:27 -04:00

27 lines
637 B
TypeScript

import { Base, ErrorKind } from "gen/msg_generated";
export { ErrorKind } from "gen/msg_generated";
export class DenoError<T extends ErrorKind> extends Error {
constructor(readonly kind: T, msg: string) {
super(msg);
this.name = ErrorKind[kind];
}
}
// @internal
export function maybeThrowError(base: Base): void {
const err = maybeError(base);
if (err != null) {
throw err;
}
}
// @internal
export function maybeError(base: Base): null | DenoError<ErrorKind> {
const kind = base.errorKind();
if (kind === ErrorKind.NoError) {
return null;
} else {
return new DenoError(kind, base.error()!);
}
}