How to exclude generated files?

I'm using Happy to generate `.hs` files from `.y` files, and stan reports errors in the `.hs` file (notably, Happy-generated files use `(!!)`) that I would like to exclude from reports.

How can I exclude that file?

Is that currently possible? The problem is that apparently you're supposed to report the path to the `.hs` file relative to the root of the project, but generated files don't have a stable location. The path to the file shown in the report is the absolute path on my filesystem, going into the `dist-newstyle/` directory (see picture). One way would be to have a way to ignore any file whose path ends with `MyLib/Parser.hs`, rather than matching a relative path exactly.


The issue provides no source file, test, or entry point to start from. First trace how Stan reads exclusion paths and how report paths are produced, then determine whether generated files can be matched by a stable suffix or another pattern. Done means the requested generated `.hs` file can be excluded reliably and the behavior is covered by tests.

Written by the indexing model from the issue text.