patch applied (packages/containers): Remove the rest of base to leave a "containers" package

Duncan Coutts duncan.coutts at
Sat Aug 4 09:44:24 EDT 2007

On Sat, 2007-08-04 at 14:26 +0100, ross at wrote:
> Quoting Ian Lynagh <igloo at>:
> > Wed Aug  1 15:38:31 PDT 2007  Ian Lynagh <igloo at>
> >   * Remove the rest of base to leave a "containers" package
> There may be a case for treating the constructor classes (in Data.Foldable
> and Data.Traversable) differently from the concrete container types
> (Data.Set et al).  For example, to accomodate the instances for Array in
> the current setup, one of array and containers must depend on the other,
> although they are not otherwise related.

I'd certainly argue for this too, the classes should be lower down the
package tree than the instances, otherwise it discourages people from
making their data types instances of these useful classes.

Same argument applies to deriving generics support; that now requires
depending on the generic package, even if it's no functions from it are


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