Re: [Haskell-beginners] reading lines with history from bash terminal in OS X

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 wrote:

Thanks. I'll install haskeline

On Thu, Jul 28, 2016 at 5:05 PM, David McBride 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 wrote:

...

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?

D

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