[Haskell-beginners] Using GHCi, import submodule that needs to import another submodule?
james at jtoll.com
Wed Mar 5 19:12:33 UTC 2014
On Mar 5, 2014, at 12:47 PM, Brent Yorgey wrote:
> On Wed, Mar 05, 2014 at 12:39:01PM -0600, James Toll wrote:
>> Prelude> :load Geometry.Sphere
>> [1 of 1] Compiling Geometry.Sphere ( Geometry/Sphere.hs, interpreted )
>> Ok, modules loaded: Geometry.Sphere.
>> *Geometry.Sphere> :load Geometry.Cube
>> [1 of 2] Compiling Geometry.Cuboid ( Geometry/Cuboid.hs, interpreted )
>> [2 of 2] Compiling Geometry.Cube ( Geometry/Cube.hs, interpreted )
>> Ok, modules loaded: Geometry.Cube, Geometry.Cuboid.
> Use :add instead of :load for Geometry.Cube. :load loads the
> specified module but forgets anything that was previously loaded.
> :add loads a module without forgetting previously loaded things.
> The differeces between :load, :add, and :module/import are somewhat
> subtle and certainly confusing. You may find
Thank you for the suggestion. I will read up on scope and try using add. But what I would really prefer is to be able to import individual submodules in GHCi using standard import syntax from the GHCi command line:
Prelude> import qualified Geometry.Sphere as Sphere
Is that not possible? LYAHFFG seems to imply that it is, and Daniel’s response to this question seems to also suggest that it’s possible. Then I can control how the functions in the submodule are referenced.
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