Re: [Haskell-cafe] [Haskell] ANNOUNCE: control-monad-loop 0.1

9 Jul 2012

      * Joey Adams  [2012-07-09 01:38:06-0400]
...
This package provides imperative-style loops supporting "continue" and
"break".  For example:
import Control.Monad
    import Control.Monad.IO.Class
    import Control.Monad.Trans.Loop
    import Control.Monad.Trans.Class
main :: IO ()
    main =
        foreach [0..] $ \i ->
        foreach [0..] $ \j -> do
            when (j == 0) $
                continue    -- skip to next iteration
            when (j >= 5) $
                exit        -- exit the loop
            when (i >= 5) $
                lift exit   -- exit the outer loop by calling 'exit'
in the parent monad
            liftIO $ print (i, j)
Very nice!

Here's a patch to generalize foreach to any Foldable:
https://github.com/joeyadams/haskell-control-monad-loop/pull/1

Also, it's not obvious how your tests work. Please consider using HUnit
and test-framework (or similar) to organize them.

-- 
Roman I. Cheplyaka :: http://ro-che.info/

Re: [Haskell-cafe] [Haskell] ANNOUNCE: control-monad-loop 0.1

Roman Cheplyaka