🐛 Bug: [the-shape-of-types]

[scalixtro]

Bug Report Checklist

• [X] I have tried restarting my IDE and the issue persists.
• [X] I have pulled the latest main branch of the repository.
• [X] I have searched for related issues and found none that matched my issue.
• [X] This is the appropriate issue form for the bug I would like to report.

Expected

Class MockHorror is assignable to exported class Horror.

Actual

Got an error Argument of type 'MockHorror' is not assignable to parameter of type 'Horror & Horror'. Type 'MockHorror' is missing the following properties from type 'Horror': #consumed, #consume, doBattle, getPower when I run the command npm run tsc -- --watch in the the-shape-of-types project.

Impacted Project

projects/classes/the-shape-of-types

Additional Info

• I tried copying the solution.ts code into index.ts to see if there was something wrong with my solution, but the error persisted.

[JoshuaKGoldberg]

Hmm, looks like an introduced failure in new versions of TypeScript. It used to be TypeScript understood all the classes -Demon, Horror, Sorcerer- to be coming from the same place, so instances of Horror would all be assignable to each other. Newer versions of TypeScript no longer seem to. I'll send a PR to fix. Thanks for reporting @scalixtro!

[JoshuaKGoldberg]

This should be fixed if you pull in the latest commits on the main branch. Please do post back if that's not the case. Thanks again for reporting @scalixtro!