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fix typo in comment
[ghc-hetmet.git]
/
compiler
/
types
/
FunDeps.lhs
diff --git
a/compiler/types/FunDeps.lhs
b/compiler/types/FunDeps.lhs
index
0d7eb24
..
5ece047
100644
(file)
--- a/
compiler/types/FunDeps.lhs
+++ b/
compiler/types/FunDeps.lhs
@@
-222,7
+222,11
@@
NOTA BENE:
improve inst_env preds
= [ eqn | group <- equivClassesByUniq (predTyUnique . fst) (filterEqPreds preds),
eqn <- checkGroup inst_env group ]
improve inst_env preds
= [ eqn | group <- equivClassesByUniq (predTyUnique . fst) (filterEqPreds preds),
eqn <- checkGroup inst_env group ]
- where filterEqPreds = filter (not . isEqPred . fst)
+ where
+ filterEqPreds = filter (not . isEqPred . fst)
+ -- Equality predicates don't have uniques
+ -- In any case, improvement *generates*, rather than
+ -- *consumes*, equality constraints
----------
checkGroup :: (Class -> [Instance])
----------
checkGroup :: (Class -> [Instance])