[Haskell-cafe] Problems with do notation

[Peter Verswyvelen]

worksFine =
  if True
  then putStrLn "True"
  else putStrLn "False"

worksNOT = do
  if True
  then putStrLn "True"
  else putStrLn "False"

worksAgain = do
  if True
    then putStrLn "True"
    else putStrLn "False"

Of course the worksFine function returns an IO action, so has different 
behavior, but I mean the indentation is different. Is this by design?


Also the following is rather strange:

doubleDefError = let x = 1
                x = 2
            in x * x

alsoDoubleDefError = do
  let x = 1
      x = 2
  return (x*x)

doubleDefNOERROR = do
  let x = 1
  let x = 2
  return (x*x)

Now I understand why this is (the second let starts a new invisible 
scope no?), but for newbies, this is all very strange :-)

Cheers,
Peter

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