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InstantiatedNamedWildcardsInConstraints.hs:4:14: error:
Found type wildcard ‘_a’ standing for ‘b’
Where: ‘b’ is a rigid type variable bound by
the inferred type of foo :: (Enum b, Show b) => b -> (String, b)
at InstantiatedNamedWildcardsInConstraints.hs:4:8
To use the inferred type, enable PartialTypeSignatures
In the type signature for:
foo :: (Enum _a, _) => _a -> (String, b)
InstantiatedNamedWildcardsInConstraints.hs:4:18: error:
Found hole ‘_’ with inferred constraints: Show b
To use the inferred type, enable PartialTypeSignatures
In the type signature for:
foo :: (Enum _a, _) => _a -> (String, b)
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