[Haskell-beginners] literate programming

[Dennis Raddle]

Does literate programming in haskell (.lhs) support the idea in Knuth's WEB
of using aliases for blocks of code? In other words doing something like

main = do
  <part 1>
  <part 2>

<part 1> === putStrLn "foo"
<part 2> === putStrLn "bar"

(except I don't know what the actual syntax is)

-Dennis
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