On 12 September 2012 19:55, Ivan Lazar Miljenovic <[email protected]> wrote: > On 12 September 2012 18:24, Sergey Mironov <[email protected]> wrote: >> Hi. Just a brief question. System.IO functions are defined in IO monad >> and have signatures like Foo -> IO Bar. >> Would it be better to have all of them defined as (MonadIO m) => Foo >> -> m Bar? What are the problems that would arise? > > That would require MonadIO being defined in base, and might make some > existing code fail due to lack of type signatures (though I suppose > you could specify a default).
Oh, and you'd still need to define them all somewhere to work _for_ IO so you can then have the liftIO variants anyway. > > -- > Ivan Lazar Miljenovic > [email protected] > http://IvanMiljenovic.wordpress.com -- Ivan Lazar Miljenovic [email protected] http://IvanMiljenovic.wordpress.com _______________________________________________ Haskell-Cafe mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell-cafe
