Description
Your environment
Which OS do you use?
Windows
Which version of GHC do you use and how did you install it?
9.6.3 from nix
How is your project built (alternative: link to the project)?
cabal
Which LSP client (editor/plugin) do you use?
VSCode + Haskell extension
Which version of HLS do you use and how did you install it?
2.4.0.0 from nix
Have you configured HLS in any way (especially: a hie.yaml file)?
No
Steps to reproduce
Create code that has an infix operator leading on a line, e.g.:
module Main where
import qualified Data.Map.Strict as M
main :: IO ()
main = do
let foo =
M.fromList
$ zipWith
(+)
[0 .. 9]
[10, 20 .. 30]
pure ()
Format it via VSCode (Shift+Alt+F): It remains the same.
Format it on the command line using fourmolu path/to/Main.hs. It comes out with the $ on the end of the previous line:
main :: IO ()
main = do
let foo =
M.fromList $
zipWith
(+)
[0 .. 9]
[10, 20 .. 30]
pure ()
Expected behaviour
HLS in VSCode should format it with the $ trailing after M.fromList.
Actual behaviour
HLS in VSCode formats it with the $ leading before zipWith.
Debug information
On the command line:
$ fourmolu --version
fourmolu 0.14.0.0
using ghc-lib-parser 9.6.3.20231014
In the HLS log within VSCode:
2023-11-27T17:37:51.110548Z | Debug | fourmolu: Using compiled in fourmolu-0.14.0.0
Note that it doesn't say what version of ghc-lib-parser it's using. Maybe that makes the difference? Was it compiled with ghc-lib-parser 9.6.2?