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tcfail063.hs:6:9: error:
• Expecting one more argument to ‘Num’
Expected a constraint, but ‘Num’ has kind ‘* -> Constraint’
• In the type signature: moby :: Num => Int -> a -> Int
tcfail063.hs:7:14: error:
• Could not deduce: a ~ Int
from the context: Num
bound by the type signature for:
moby :: forall a. Num => Int -> a -> Int
at tcfail063.hs:6:1-30
‘a’ is a rigid type variable bound by
the type signature for:
moby :: forall a. Num => Int -> a -> Int
at tcfail063.hs:6:1-30
• In the second argument of ‘(+)’, namely ‘y’
In the expression: x + y
In an equation for ‘moby’: moby x y = x + y
• Relevant bindings include
y :: a (bound at tcfail063.hs:7:8)
moby :: Int -> a -> Int (bound at tcfail063.hs:7:1)
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