Reexport 'hFlush'

[chshersh]

And lift to MonadIO

[rektrex]

@chshersh, I would like to try to make the changes using the new module structure.

[chshersh]

@rektrex The idea is to create a separate module called Relude.Lifted.Handle and put lifted and specialized versions of useful Handle-related functions in there. The module has a lot of functions, and we can always expand reexports when necessary. But I think that the following functions are useful at the moment:

• hFlush
• hIsEOF
• BufferMode
• hSetBuffering
• hGetBuffering

Additionally, it would be nice to move the following Handle definitions from Relude.Base to the new module Relude.Lifted.Handle for the sake of consistency:

• Handle
• stdin
• stdout
• stderr
• withFile (note, that even if withFile function has IO in its type, we can't lift this function properly, so we just don't touch it and reexport as it is)

After that, we can reexport add Relude.Lifted.Handle from Relude.Lifted.

Adding HLint rules for all these functions would be great as well!

Also, adding @since 0.8.0.0 annotations to the module and all new functions would be appreciated 🙂

[rektrex]

Additionally, it would be nice to move the following Handle definitions from Relude.Base to the new module Relude.Lifted.Handle for the sake of consistency

Sorry, I don't understand this part.

I'll start with the other parts.

Edit: BufferMode is not a function, right? Did you have some other function in your mind?

[chshersh]

Additionally, it would be nice to move the following Handle definitions from Relude.Base to the new module Relude.Lifted.Handle for the sake of consistency

@rektrex No worries! Sorry if I wasn't clear. What I mean is that the Relude.Base module currently exports Handle, stdount and other functions from that list. But since we are introducing a separate Relude.Lifted.Handle module, it makes sense to reexport everything related to handles from this module instead, to keep the API and code more consistent. So these old things that we already reexport from Relude.Base should be reexported from Relude.Lifted.Handle instead.