## Summary
- Changed `sourceCode.parserServices` from throwing an error to
returning an empty object `{}`
- Aligns with ESLint specification for parsers that don't implement
parser services
- Prevents crashes in ESLint plugins such as
`eslint-plugin-better-tailwindcss`.
## Motivation
According to the [ESLint custom parser
documentation](https://eslint.org/docs/latest/extend/custom-parsers#parseforeslint-return-object):
> services can contain any parser-dependent services (such as type
checkers for nodes). The value of the services property is available to
rules as context.sourceCode.parserServices. **Default is an empty
object.**
The current implementation throws an error when `parserServices` is
accessed, which breaks plugins that use defensive checks like:
```typescript
if(typeof ctx.sourceCode.parserServices?.defineTemplateBodyVisitor === "function"){
// ...
}
```
Plugin authors defensively handle:
- ✅ `parserServices` being undefined
- ✅ `defineTemplateBodyVisitor` not existing
- ❌ `parserServices` getter throwing an error (unexpected)
## Solution
Return an empty object `{}` for unimplemented parser services, which:
1. Matches ESLint's documented default behavior
2. Allows plugins' defensive checks to work correctly
3. Provides correct semantics for "not implemented"
## Test Plan
- Existing tests should continue to pass
- Plugins using defensive checks like the example above will no longer
crash
## Related
Fixes the compatibility issue with plugins like
[eslint-plugin-better-tailwindcss](https://github.com/schoero/eslint-plugin-better-tailwindcss/blob/a90cc3f547098a4293d7b0b7998bf6774f717cd2/src/utils/rule.ts#L140)
---------
Signed-off-by: magic-akari <akari.ccino@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: overlookmotel <theoverlookmotel@gmail.com>
Boshen