fix(linter): fix VisitorObject type to allow specific typed methods with index signature

[camc314]

Use intersection type instead of interface to avoid TypeScript strict mode errors when using defineRule with specific visitor methods like Program().

This works as intersection types allow one type to overwrite another. So if i write a key that matches VisitorObjectBase it will infer the correct type, but if I write a random key, it'll just be inferred as ESTree.Node

Closes #14745

🤖 generated with help from Claude Opus 4.5

[camc314]

• refactor(linter): rename visitor.d.ts to visitor.ts #16473
• fix(linter): use import type for ESTree in visitor.d.ts #16472
• fix(linter): fix VisitorObject type to allow specific typed methods with index signature #16471 👈 (View in Graphite)
• main

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[camc314]

I'm going to write a test for this in a follow up after some more changes

[Copilot]

Pull request overview

This PR fixes a TypeScript strict mode error when using defineRule with specific visitor methods like Program(). The issue occurred because interfaces with index signatures cause all explicit properties to be type-checked against the index signature type in strict mode.

Key Changes:

• Changed oxlint's VisitorObject from an interface to an intersection type
• Split the visitor type into VisitorObjectBase (containing typed methods) and VisitorObject (intersection with index signature)
• This allows specific keys to maintain their typed signatures while unknown keys use the generic (node: ESTree.Node) => void signature

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated no comments.

File	Description
tasks/ast_tools/src/generators/estree_visit.rs	Updated the generator template for oxlint to create VisitorObjectBase and VisitorObject as an intersection type instead of a single interface
apps/oxlint/src-js/generated/visitor.d.ts	Generated TypeScript definition file with the new intersection type pattern that resolves strict mode errors

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[overlookmotel]

Great!

Out of interest, would this still work if VisitorObjectBase was an interface? Or does it have to be a type too for this to work?

[graphite-app]

Merge activity

• Dec 3, 11:06 PM UTC: overlookmotel added this pull request to the Graphite merge queue.
• Dec 3, 11:07 PM UTC: The Graphite merge queue couldn't merge this PR because it was in draft mode.

[camc314]

Closing for now, need to think about this more