Dear GHC and Haskell experts, I need advice on the following question. My application program (called DoCon), being ported recently to ghc-6.0.1, needs to provide the user (program) with the following visibility scope of items: all the proper DoCon export + most of Haskell standard library + FiniteMap, and maybe some others (please, help FiniteMap, Set to become standard!). What is the best way to organize this? I arrange this by reexporting a large part of Haskell library from certain particular DoCon module DExport. This is put so because most mathematician users are lazy to search among proper Haskell libraries: they had already imported DoCon+(Haskell library) from DoCon, and do not want to search any more among List, Ratio, etc. -------------------------------------------------------------- module DExport -- All the export of DoCon + part of GHC exploited by DoCon. -- -- Set the line import DExport -- -- if you are lazy to find more precisely which modules your -- program needs. (module DPrelude, module Categs, ... -- DoCon proper export ... module Data.FiniteMap, module Prelude, module List, module Ratio, module Random ) where import Data.FiniteMap import List hiding (minimum, maximum, sort, sortBy) import Prelude hiding (minimum, maximum, ) import Ratio import Random import DPrelude -- DoCon proper import ... ------------------------------------------------- Is this a reasonable way to arrange the thing? Now, the ghc-6.0.1 compiler reports Compiling DExport ... Warning: `++' is exported by `module Prelude' and `module List' .. Warning: `foldr' is exported by `module Prelude' and `module List' .. Warning: `concat' is exported by `module Prelude' and `module List' ... I think that these overlaps are harmless, and the compiler will still set the intended definitions for (++), foldr, etc., without any danger. Aslo proper DoCon export fron DExport has many similar overlaps. I think that it is often useful to be able to import an item from different modules. Is this reasonable? Generally, I accept these overlap warnings as useful ones. But at the installation, such strange numerous warnings on DExport will frighten the user. Therefore, Makefile has, probably, to compile the last module DExport with this kind of messages switched off. Right? Thank you in advance for your advice. Answer, please, to mechvel@botik.ru ----------------- Serge Mechveliani mechvel@botik.ru