#13437: Easier editing of multi-line GHCi-commands -------------------------------------+------------------------------------- Reporter: fredefox | Owner: (none) Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Description changed by fredefox: Old description:
In my terminal emulator I can write something like:
{{{ cat > /dev/null << EOF bla bla bla EOF }}}
If I later want to edit something in this command I can recall the command from history and I can navigate to the line I want to change. In GHCi this is not possible, the history only recalls *one line* at a time. It would be nice if it recognized commands entered using {{{ :{ ... }: }}} and would give you that whole command when recalling commands from the history.
Also, it would be very handy if doing e.g. Shift+Enter would insert a newline into your multi-line command rather than run the command.
Furthermore, it could also serve as a handy shortcut for engaging the multi-line command mode. So say you were sitting at the prompt {{{ > }}} and you then hit enter, then GHCi moves to a new-line but has inserted the {{{ :{ }}} part for you, it could similarly close the command for you when you hit Enter (without holding down the modifier key).
I believe this change would make GHCi's multi-line command mode way more useful. Currently I very seldomly (if ever) use GHCi for anything other than one-liners. This means that I usually have to edit the source-file I'm currently working on to put things into scope (or try and formulate a long and awkward expression).
New description: In my terminal emulator I can write something like: {{{ cat > /dev/null << EOF bla bla bla EOF }}} If I later want to edit something in this command I can recall the command from history and I can navigate to the line I want to change. In GHCi this is not possible, the history only recalls *one line* at a time. It would be nice if it recognized commands entered using {{{ :{ ... }: }}} and would give you that whole command when recalling commands from the history. Also, it would be very handy if doing holding down a modifier key when hitting enter (e.g. Shift) would insert a newline into your multi-line command rather than run the command. Furthermore, it could also serve as a handy shortcut for engaging the multi-line command mode. So say you were sitting at the prompt {{{ > }}} and you then hit Shift+Enter, then GHCi moves to a new-line but has inserted the {{{ :{ }}} part for you, it could similarly close the command for you when you hit Enter (without holding down the modifier key). I believe this change would make GHCi's multi-line command mode way more useful. Currently I very seldomly (if ever) use GHCi for anything other than one-liners. This means that I usually have to edit the source-file I'm currently working on to put things into scope (or try and formulate a long and awkward expression). -- -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13437#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler