Re: [Haskell-cafe] Conditionals and case expressions in do blocks

27 Jan 2011


      aditya siram  writes:
...
Yep, I do this often and it's pretty nasty. It's especially
inconvenient that you don't have access to computations before the if,
for example:
do
 x <- something
 y <- something-else
 case y of
    Foo a -> do
                ....   <--- I want access to 'x' here
    Bar b -> ...
I don't see the problem, this works for me:

main = do
  x <- return "foo"
  y <- return "bar"
  case y of
    'b':_ -> putStrLn x
-- 
Regards,
Feri.

Re: [Haskell-cafe] Conditionals and case expressions in do blocks

Ferenc Wagner