[Haskell-cafe] Useful IDE features - What abaut automaticallyadding import statements?

[Claus Reinke]

>>  > Eclipse does have this which saves you a lot of time:
>>  > Fix imports.
>> 
>> Could you describe the semantics of that more precisely?
> 
> You get the error:
> Not in scope 'c'
> 
> and the IDE should figure out automatically which used packages have
> modules exporting c.
> Then it should ask wether you want import one of those modules and add
> the module to the import list.

in my vim setup, i can hit '_i' (import) or '_im' (import module) on an 
identifier to get a menu of modules from which it could be imported;
selecting an entry adds an import to the current module, either for the
identifier only, or for the whole module it comes from (this feature 
gets its information from haddock's indices of the standard 
hierarchical libs, so it is currently limited to identifiers found there) .

combined with quickfix mode, which will jump to the identifier not
in scope, this seems to be quite close to what you ask for?

http://www.cs.kent.ac.uk/people/staff/cr3/toolbox/haskell/Vim/

[while useful, it doesn't check for existing imports, and it relies on
 ghc --make/--interactive to find the packages holding the modules]

there's also '_.' which will use the same data to suggest possible
fully qualified identifiers for the id under cursor.

claus

ps
HaRe also had some transformations for manipulating imports/exports.
http://www.cs.kent.ac.uk/projects/refactor-fp/hare.html