Misleading compile error message in wildcard exports

[antognini]

Compiler version

3.3.0

Minimized code

object A:
  val x, y, z = 0

object B:
  export A.{*, x as _} // compile error at this line

Output

named imports cannot follow wildcard imports
  export A.{*, x as _}

Expectation

The compiler correctly stops, but there are no import statements involved; the error message should be

named exports cannot follow wildcard exports
  export A.{*, x as _}

[odersky]

This could be a good first issue for a someone joining a spree.

[scala-center-bot]

This issue was picked for the Issue Spree No. 33 of 11 July 2023 which takes place in 7 days. @mbovel, @KuceraMartin, @clavigne will be working on it. If you have any insight into the issue or guidance on how to fix it, please leave it here.

[mbovel]

This is where the error is emitted: https://github.com/lampepfl/dotty/blob/ed319e8a41ef46ea5d7db35f3608eb17d8bbe7d3/compiler/src/dotty/tools/dotc/parsing/Parsers.scala#L3522

importExpr is called from: https://github.com/lampepfl/dotty/blob/ed319e8a41ef46ea5d7db35f3608eb17d8bbe7d3/compiler/src/dotty/tools/dotc/parsing/Parsers.scala#L3422

[mbovel]

@clavigne as this is your first Spree, welcome!

To get started hacking on the Dotty codebase, you will need to clone it, compile it and open it in VS Code using the following commands:

git clone https://github.com/lampepfl/dotty.git
cd dotty
sbt compile
code .

Then you will need to setup Metals to use the SBT build server. To do it, run the "Switch Build Server" VS Code command (by default the shortcut to open the VS Code command palette is control-⇧-P):

To learn more: https://dotty.epfl.ch/docs/contributing/getting-started.html.

[clavigne]

Hi @mbovel, thanks for the instructions! I'll be using Intellij if that's ok, I'm much more familiar with it than with VSCode. Talk to you soon!