fix #SCL-23707

[Alex1005a]

To fix the problem I had to change the parsing of interpolated string. I'm not sure if it's correct, but I couldn't find another way.

https://youtrack.jetbrains.com/issue/SCL-23707

[unkarjedy]

Thank you for the contribution and sorry for the late reply!
Please add tests to all the effected subsystems (in this case parser, parameter info, annotator/type inference (original issue is the red code))

[unkarjedy]

I don't think that changing the parser is needed here.
It also goes against Scala definition of what Scala interpolated string is
https://docs.scala-lang.org/scala3/reference/syntax.html

[Alex1005a]

Yes, from the specification point of view it is not correct. I did it this way because interpolated string is parsed first into an intermediate structure, and not immediately desugar as in the scala compiler. Desugaring occurs in the desugaredExpression method, and if no arguments are passed to the function from interpolator during it, the type check will fail.
There is probably a more correct way to do this, but I don't know about it, since I am not very familiar with the code base and the project architecture.

[SrTobi]

@Alex1005a hi. Thanks for your PR. I used the tests, but ended up not using your implementation. The syntax tree that was generated was already correct. The problem was more that the annotator couldn't handle the de-sugaring correctly. That's why you pulled the arguments into the desugaring. This didn't help with some other cases, though, like

implicit class CustomInterpolator(private val stringContext: StringContext) {
  def test(values: Any*)(i: Int): Unit = {}
}

// this was still annotated as missing a parameter list, although the compiler allows this
val x = test"" // type of x is then Int => Unit

// you would expect the compiler to complain and demand something like
val x = test"" _
// but that is not the case ¯\_(ツ)_/¯

In the end I just tweaked the annotator a little bit to be aware of the de-sugaring and disable missing-parameter clauses for interpolated string literals altogether 😁

I merged it manually, so this PR can be closed. Thanks again 👍