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JustinChristensen/standalone.hs

Created April 5, 2021 04:43
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standalone.hs
λ: data Bar a; data Foo t a = Foo (t (Bar a))
λ: :set -XStandaloneDeriving
λ: instance (Show t, Show a) => Show (Foo t a)
<interactive>:6:40: error:
• Expected kind ‘* -> *’, but ‘t’ has kind ‘*’
• In the first argument of ‘Foo’, namely ‘t’
In the first argument of ‘Show’, namely ‘(Foo t a)’
In the instance declaration for ‘Show (Foo t a)’
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