Overview

Coming over from microsoft/TypeScript#54693 (comment): in v6 we removed parserServices.hasFullTypeInformation. Consumers can now check if parserServices.program exists. But, there are a few existing external consumers that rely on it:

• Sourcegraph search for parserServices.hasFullTypeInformation: 23 results
• Sourcegraph search for parserServices?.hasFullTypeInformation: 4 results

If we do nothing and keep it removed, the referenced plugins/etc. may not work out-of-the-box with v6. I'm happy to send PRs over to help them upgrade, but that might be kind of a pain. And we don't know what internal code will break.

Proposal: how about we add it back in as a /** @deprecated */ property, then remove it in v7? It's not much to add/change on our end. Thoughts @typescript-eslint/triage-team?