[Haskell-beginners] reading lines with history from bash terminal in OS X
dennis.raddle at gmail.com
Mon Aug 1 08:06:05 UTC 2016
I'm looking over haskeline. It looks like I have to modify some of my code
that is in the IO monad right now. I use 'evaluate' in several places, and
also 'evaluate $ force', to make sure that IO exceptions are encountered
where I can catch them. Can I use 'evaluate' with InputT? I'm muddled
headed about what to do. I guess I would lift 'evaluate' into the inner
monad? I am not sure what those words mean. How would I catch IO exceptions?
On Thu, Jul 28, 2016 at 5:35 PM, Dennis Raddle <dennis.raddle at gmail.com>
> Thanks. I'll install haskeline
> On Thu, Jul 28, 2016 at 5:05 PM, David McBride <toad3k at gmail.com> wrote:
>> You will have to use the haskeline library. FYI that is the library that
>> makes ghci work.
>> On Thu, Jul 28, 2016 at 6:09 PM, Dennis Raddle <dennis.raddle at gmail.com>
>>> I wrote a program first in Windows, where it works as expected, and now
>>> I'm using it in OS X and getting undesired behavior.
>>> It reads lines from the terminal using the getLine function. In Windows
>>> (DOS, actually) the up and down arrows can be used to choose previously
>>> entered lines. However, this does not work in bash in OS X.
>>> What do I need to get the history available via the arrow keys?
>>> Beginners mailing list
>>> Beginners at haskell.org
>> Beginners mailing list
>> Beginners at haskell.org
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