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authorSimon Peyton Jones <simonpj@microsoft.com>2011-05-26 17:19:18 +0100
committerSimon Peyton Jones <simonpj@microsoft.com>2011-05-26 17:19:18 +0100
commit3afdf90d0f9fb18f13a6b76fe41e5fc60bbdaac3 (patch)
tree70e7ece16dfdfdf62b4e84a170d357a39370c93d /compiler/NOTES
parent80f5e7009434750cee746bd89f7eea5f7c7fa3fd (diff)
downloadhaskell-3afdf90d0f9fb18f13a6b76fe41e5fc60bbdaac3.tar.gz
Treat the (~) type constructor a bit specially
when kind-checking in Core Lint. It's unusual becuase it is poly-kinded; for example (~) Int a and (~) Maybe b are both ok. We don't want the full generality of kind polymorphism (yet anyway) so these changes in effect give (~) its own private kinding rule. It won't work right if (~) appears un-saturated, and Lint now checks for that too.
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