🚀 Feature: Migrate functions from @typescript-eslint/type-utils

[RebeccaStevens]

Bug Report Checklist

• I have tried restarting my IDE and the issue persists.
• I have pulled the latest main branch of the repository.
• I have searched for related issues and found none that matched my issue.

Overview

Some of the functions there could probably be moved to this project (or at least exists in both).

Additional Info

List of functions:

• containsAllTypesByName
• getConstrainedTypeAtLocation
• getContextualType
• getDeclaration
• getSourceFileOfNode
• getTokenAtPosition
• getTypeArguments
• getTypeName
• isTypeReadonly
• isUnsafeAssignment
• isNullableType
• isTypeArrayTypeOrUnionOfArrayTypes
• isTypeNeverType
• isTypeUnknownType
• isTypeReferenceType
• isTypeAnyType
• isTypeAnyArrayType
• isTypeUnknownArrayType
• isAnyOrAnyArrayTypeDiscriminated
• typeIsOrHasBaseType
• isTypeBigIntLiteralType
• isTypeTemplateLiteralType
• getTypeOfPropertyOfName
• getTypeOfPropertyOfType
• requiresQuoting
• getTypeFlags
• isTypeFlagSet

[JoshuaKGoldberg]

🤔 yeah I don't know how useful adding many of these would be. A lot of those functions are implemented specifically how typescript-eslint would want them.

[RebeccaStevens]

I notice that in one of my projects, I'm currently using getTypeOfPropertyOfType from @typescript-eslint/type-utils and (will be) using a bunch of functions from this library.

I thought that it might be possible for me to drop the dependency on @typescript-eslint/type-utils and just use this library if that function existed here. It seemed like it might be general enough to do so.

[JoshuaKGoldberg]

cc @bradzacher - any thoughts here, as you've done more with type-utils than me?

[bradzacher]

I don't know exactly - some of them are probably general enough to exist here.
the main reason we went down the route of our own package was really because tsutils was unmaintained so there was no way for us to change how things worked, add functions or fix bugs.

If there is broader use outside eslint then for sure we can migrate them!

[JoshuaKGoldberg]

Cool in that case it sounds like there's no reason for me to be hesitant. I'm just always reluctant to add things - even though this sounds like it is just making the stuff more publicly visible! 😄