Fix incorrectly reported 2689 error

[Andarist]

spotted by @LukeAbby

current confusing error:

    class baz<B> {}
    interface foo<A> {
      new (): typeof baz
    }

    const bar = (foo<string>)<number>
                 ~~~
!!! error TS2689: Cannot extend an interface 'foo'. Did you mean 'implements'?

[typescript-bot]

This PR doesn't have any linked issues. Please open an issue that references this PR. From there we can discuss and prioritise.

[jakebailey]

This func does some goofy stuff with JSDoc, but maybe that's fine

[jakebailey]

Weird, Corsa doesn't have this func at all. Wonder why its callers are gone

[Andarist]

This func does some goofy stuff with JSDoc, but maybe that's fine

Yeah, I've seen that but assumed it's fine and won't hurt this.

Weird, Corsa doesn't have this func at all. Wonder why its callers are gone

I'll take a look at Corsa's implementation later but FWIW, it suffers from the same issue: TS GO playground

[jakebailey]

Oh, it totally does, I just went to search for this func name and was surprised to see it not existing!

[Andarist]

Weird, Corsa doesn't have this func at all. Wonder why its callers are gone

It has c.getEntityNameForExtendingInterface, c.checkAndReportErrorForExtendingInterface, ast.IsEntityNameExpression and ast.IsExpressionWithTypeArgumentsInClassExtendsClause. Maybe you have missed one of those? I don't know which one you referred to as missing.

[typescript-bot]

With 6.0 out as the final release vehicle for this codebase, we're closing all PRs that don't fit the merge criteria for post-6.0 patches. If you think this was a mistake and this PR fits the post-6.0 patch criteria, please post to the 6.0 iteration issue with details (specifically, which PR and which patch criteria it satisfies).

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