Re: [Haskell-cafe] name lists

17 Sep 2013


      Roman Cheplyaka  writes:
...
* Ben Gamari  [2013-09-17 10:03:41-0400]
...
Another approach might be to introduce some notion of a name list which
can appear in the export list. These lists could be built up by either
user declarations in the source module or in Template Haskell splices
and would serve as a way to group logically related exports. This
would allow uses such as (excuse the terrible syntax),
Hi Ben,
Isn't this subsumed by ordinary Haskell modules, barring the current
compilers' limitation that modules are in 1-to-1 correspondence with
files (and thus are somewhat heavy-weight)?
E.g. the above could be structured as
module MyDataLenses where
    data MyData = MyData { ... }
    makeLenses ''MyData
module HelloWorld (module MyDataLenses, ...) where
    ...
True. Unfortunately I've not seen much motion towards relaxing this
limitation[1].

Cheers,

- Ben


[1] http://ghc.haskell.org/trac/ghc/ticket/2551