max.rabkin at gmail.com
Thu May 14 16:56:20 EDT 2009
On Thu, May 14, 2009 at 10:51 PM, Vasili I. Galchin <vigalchin at gmail.com> wrote:
> When I am compiling a module, I get "Could not find module
> it is a
> member of package mtl-126.96.36.199, which is hidden"
> 1) What is the efficacy of "hiddenness"?
As I understand it, the purpose is two-fold. Firstly, if you have
multiple versions a package (or multiple packages containing the same
module), you can hide the ones not in use. Second, it ensures you have
declared all dependencies.
> 2) I have forgotten what tool I run to expose a package. ??
I've only ever had this when working with Cabal, where I have missed a
dependency. In this case, it looks like you have an undeclared
dependency on mtl. I'm not sure whether this arises in the non-Cabal
> 3) In another vein, the code is using Data.Finitemap ... so I guess I
> must "darcs" install this?
I believe it was just uploaded to Hackage (it's obsolete, but useful
for getting old code to run).
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