Emacs Org-Mode & Literate Haskell

Question

In org-mode, a line starting with a colon is formatted as source code. ( http://orgmode.org/manual/Literal-examples.html )

In literate Haskell, source code lines start w

Answer 1

I'm a bit late, but I recently started to work on the 99 Haskell problems and decided to collect my work in an org mode file.

The orgmode way of literate programming (as I understand it), is to encapsulate source code blocks in BEGIN/END blocks. For example,

#+BEGIN_SRC hs :tangle yes
myReverse :: [a] -> [a]
myReverse l = myReverse' l []
myReverse' [] accu = accu
myReverse' (x:xs) accu = myReverse' xs (x:accu)
#+END_SRC

Such a structured orgmode document can then be

• exported Exporting is the transformation of an orgmode file to one of several other file formats by means of a backend. Some of those formats are PDF, LateX or HTML.

• tangled This goes in the direction of literate programming and weaving. Code blocks can be exported to pure source files. This is what I do in my 99 problems file.

• executed Source code blocks can be executed, and the result of this execution can be placed directly in the orgmode file. I have not tried this yet for haskell.

You can have a look at my attempts at github: https://github.com/dischoen/H99 There I tangle the orgmode file to two haskell files, a module and a test harness, which can then be tested in ghc or ghci.