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a21a5ad2fa
Resolves #1705 This PR adds the Deno APIs as a global namespace named `Deno`. For backwards compatibility, the ability to `import * from "deno"` is preserved. I have tried to convert every test and internal code the references the module to use the namespace instead, but because I didn't break compatibility I am not sure. On the REPL, `deno` no longer exists, replaced only with `Deno` to align with the regular runtime. The runtime type library includes both the namespace and module. This means it duplicates the whole type information. When we remove the functionality from the runtime, it will be a one line change to the library generator to remove the module definition from the type library. I marked a `TODO` in a couple places where to remove the `"deno"` module, but there are additional places I know I didn't mark.
43 lines
1.1 KiB
TypeScript
43 lines
1.1 KiB
TypeScript
// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
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import { Base, ErrorKind } from "gen/msg_generated";
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export { ErrorKind } from "gen/msg_generated";
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/** A Deno specific error. The `kind` property is set to a specific error code
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* which can be used to in application logic.
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*
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* try {
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* somethingThatMightThrow();
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* } catch (e) {
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* if (
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* e instanceof Deno.DenoError &&
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* e.kind === Deno.ErrorKind.Overflow
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* ) {
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* console.error("Overflow error!");
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* }
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* }
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*
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*/
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export class DenoError<T extends ErrorKind> extends Error {
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constructor(readonly kind: T, msg: string) {
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super(msg);
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this.name = ErrorKind[kind];
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}
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}
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// @internal
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export function maybeThrowError(base: Base): void {
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const err = maybeError(base);
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if (err != null) {
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throw err;
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}
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}
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// @internal
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export function maybeError(base: Base): null | DenoError<ErrorKind> {
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const kind = base.errorKind();
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if (kind === ErrorKind.NoError) {
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return null;
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} else {
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return new DenoError(kind, base.error()!);
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}
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}
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