How to use prefix for limited qualified import

Question

I often find that I use a library with a set of related modules, say:

A.B
A.B.C
A.B.D

I know what I can do

import A.B (f1, f3)
import A.B.C (f7)

But sometimes these functions have common names that I don’t want to pollute in the main namespace.

So, I can do:

import qualified A.B (f1, f3) 
import qualified A.B.C (f7)

But then I have to call functions like A.B.C.f7that which is quite long.

I could do:

import qualified A.B   as B 
import qualified A.B.C as C

This helps a bit, but I still need to remember and indicate if my functions are from B or C.

What I found is that you can do this:

import qualified A.B   as B 
import qualified A.B.C as B

Unless there is a function in A.Band A.B.Cwith the same name, and you are trying to use it, you will get a compilation error.

So what I basically want to do is:

import qualified A.B (f1, f3) as B 
import qualified A.B.C (f7)   as B

. (, ), , ?

Answer 1

.

import qualified A.B   as B (f1, f3) 
import qualified A.B.C as B (f7)

- GHC.