Re: [Haskell-beginners] "module Main" from hitchhikers guide cd fit example

On Wednesday 28 July 2010 10:55:25, Johann Bach wrote:

On Wed, Jul 28, 2010 at 1:42 AM, wrote:

...

I'm trying to work my way through the hitchhikers guide, knowing nothing about Haskell (my day-to-day programming is in Python with a sprinkling of C).  I've installed a binary distribution of Haskell Platform on my Mac. GHCi reports version 6.12.3.  I'm currently in "3 Chapter 2: Parsing the input".  I'm stuck on the module Main definition.  In hello.hs it works as expected:

The "module Main were" has to be the first line in the file.

The first *code* line. Pragmas, comments and whitespace can preceed it. Generally, a module starts with -- LANGUAGE pragmas -- OPTIONS_TOOL pragmas -- Module comment -- Module Header -- Imports then come the definitions you make. Pragmas and imports appear of course only if needed. The module comment for haddocks is optional, but if you distribute a library, it's good practice to have one. The module header, module Foo (exportlist) where , is optional, if you omit it, "module Main (main) where" is assumed. If you omit the export list ("module Foo where"), all top-level bindings are exported.