Support typescript new syntax override

[Innei]

• I have tried restarting my IDE and the issue persists.
• I have updated to the latest version of the packages.
• I have read the FAQ and my problem is not listed.

Repro

Can't parse override syntax. Like this.

Expected Result

parse override syntax.

Actual Result

Parsing error: ';' expected. eslint

Additional Info

Parsing error: ';' expected. eslint

Versions

package	version
@typescript-eslint/parser	4.25.0
TypeScript	4.4-dev
ESLint	7.26.0
node	14

[Innei]

https://devblogs.microsoft.com/typescript/announcing-typescript-4-3-beta/#override-and-the-noimplicitoverride-flag

[bradzacher]

We do support #3429 as of v4.25.0

If it's not working for you then likely your installed version is wrong.

[Innei]

Thank you for your reply. I just remove node_modules and re-install. It worked.

[akphi]

@bradzacher Thank you so much for the work! I know this validation has been handled by Typescript, is there a plan to implement a rule in typescript-eslint so we can make use of auto-fix?

We have a fairly large codebase and would like to turn on the flag --noImplicitOverride but there's currently no programmatic way to add override to all places which need it.

[bradzacher]

It's a language feature which causes errors in TS. There's no lint rule to implement.

If you want to turn it on in your project - you can script up a codemod for your codebase.
There are examples over the web of using the TS APIs to get the diagnostics, and there are other examples of using tools (like jscodeshift) to make code changes.

[akphi]

@bradzacher 🙏 thank you so much for clarifying!

[bradzacher]

@akphi please make sure you check who you're tagging so that you tag the correct user.
or else you're sending spam notifications to someone else.