'deriving Tree (Eq,Ord)'
john at repetae.net
Tue Apr 4 16:02:16 EDT 2006
On Tue, Apr 04, 2006 at 01:13:32PM -0400, Robert Dockins wrote:
> The obvious solution is to allow out-of-defining-module deriving only
> for data types where all constructors are exported. Presumably, if
> someone explicitly hid (at least some of) the constructors of a data
> type, they did it for a reason and we can hope that they carefully
> considered the external interface of that type (including instances).
indeed, that is actually a requirement of the original proposal.
John Meacham - ⑆repetae.net⑆john⑈
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