emacs haskell-mode: <tab> does not work for if/then/else within do
I'm programming Haskell (GHC 9.2.8) in Emacs 29.1 with haskell-mode 17.4 on Arch Linux, which works fine; including the REPL. However, I recently got frustrated a bit when working with effects, i.e. I'm trying to type in this dummy program:
getCmd :: IO String
getCmd = do
c <- getChar
if c == 'n' then
return "next"
else
return "previous"
However, as I'm typing, my cursor is stuck on the new line after the else keyword. When I press tab, nothing happens, and I have to indent the second return manually using spaces:
Am I using unidiomatic syntax, or is it an issue with my setup? How am I supposed to type this code?
Solution
The use of then on the same line caused the issue. This notation works:
So I can work with that and won't file a bug.
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