haskell-mode doesn't support indentation for ghcjs FFI.

[crocket]

foreign import javascript unsafe
  "$2[$1]" js_getProp :: S.JSString -> O.Object -> T.JSVal

I have to manually indent GHCJS FFI code in haskell-mode. It is tedious.
I conjecture that javascript keyword confuses haskell-mode.

[gracjan]

Can you add a unit test case?

[crocket]

Unfortunately, I don't know how to write emacs lisp, yet.
Also, I don't know what you specifically mean by a unit test case for GHCJS FFI.

[gracjan]

Unit test for indentation are in tests/haskell-indentation-tests.el.

[crocket]

I just read tests/haskell-indentation-tests.el. Since I don't know how to write emacs lisp and don't understand the internal mechanisms of haskell-mode, I was only confused.

[gracjan]

Interestingly, indentation seems to not support foreign declarations at all. Looks like a missing feature.

[crocket]

I think you'll find https://www.haskell.org/onlinereport/haskell2010/haskellch8.html#x15-1540008.4 helpful.

[crocket]

https://github.com/ghcjs/ghcjs/blob/master/doc/foreign-function-interface.md