#15887: Ideas for a better GHCi editing experience -------------------------------------+------------------------------------- Reporter: Anchpop | Owner: (none) Type: feature request | Status: new Priority: high | Milestone: Research | needed Component: Compiler | Version: 8.6.2 Resolution: | Keywords: QoL Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by Anchpop): https://github.com/prompt-toolkit/ptpython has all the features I described here (video at https://youtu.be/XDgIDslyAFM?t=4 ). While the features might be common in IDEs, that doesn't mean they would be useless in GHCi. I miss having these features every time I use GHCi. Another benefit is that it would be easier for beginners to learn. Imagine a beginner enters the following: Prelude> myHead [] = Nothing Prelude> myHead (x:xs) = Just x They'll be left scratching their head after their program crashes when they enter `myHead []`! My suggestion would have their `myHead` first definition automatically trigger multiline mode, so they could easily continue pattern matching. Teaching beginners about `:{` adds complexity and clutter to a language as simple and intuitive as Haskell. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15887#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler