On Jan 10, 2008, at 19:16 , Maurí cio wrote:
Hi,
Is it possible not to load Prelude (...)
(...) NoImplicitPrelude is more aggressive than 'import Prelude()'. You will have to look elsewhere for a better explanation of the difference.
I tried google and ghc homepage, but could not find “elsewhere” :) Can you give me a link or somewhere to start from?
You'll find it in a careful reading of the Haskell98 Report: certain syntactical constructs are rewritten into calls to Prelude functions. Most notably: a bare untyped integral number is rewritten as (fromIntegral num) (so its type will be (Num a => a)), and [n..m] list generation syntax is rewritten into calls to enumFrom ([n..]), enumFromTo ([n..m]), enumFromThen ([n,o..]), enumFromThenTo ([n,o..m]). (There are some such for which even -fno-implicit-prelude isn't enough; I think these are documented in the "bugs" section of the GHC manual.) -- brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery@kf8nh.com system administrator [openafs,heimdal,too many hats] allbery@ece.cmu.edu electrical and computer engineering, carnegie mellon university KF8NH