CPP macro for --enable-testing

[satvikc]

I want to conditionally export certain parts like constructors, types or instances which are needed to write test cases. Otherwise I wouldn't want them to be exposed to the library user.

The approach I am following now is to have Foo.Internal export necessary elements.

[23Skidoo]

The approach I am following now is to have Foo.Internal export necessary elements.

I'd say that it's the recommended approach.

[satvikc]

It is just one usecase of the above requested feature and is not the only reason why it might be needed. Also the approach of exporting elements from Internal is not viable if you have types or constructors with same name in different modules.

[23Skidoo]

Also the approach of exporting elements from Internal is not viable if you have types or constructors with same name in different modules.

Isn't that what qualified imports are for?

[satvikc]

But how will you export them from a single Internal module. Something like the following code is not possible. And I dont want to create a separte file for each module just for this.

module Internal
       ( F.Foo(..)
       , B.Foo(..)
       ) where

import qualified Foo as F
import qualified Bar as B

[23Skidoo]

Either use Foo.Internal and Bar.Internal or rename those datatypes.

[satvikc]

That's ofcourse the obvious workaround. But having this feature wouldn't hurt.

[LeviSchuck]

Is there at least a way to condition on if that flag is specified?

Thanks,