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T14846.hs:38:8: error:
• Couldn't match type ‘ríki’ with ‘Hom riki’
‘ríki’ is a rigid type variable bound by
the type signature for:
i :: forall k5 k6 (cls2 :: k6
-> Constraint) (xx :: k5) (a :: Struct cls2) (ríki :: Struct
cls2
-> Struct
cls2
-> *).
StructI xx a =>
ríki a a
at T14846.hs:38:8-48
Expected type: ríki a a
Actual type: Hom riki a a
• When checking that instance signature for ‘i’
is more general than its signature in the class
Instance sig: forall k1 k2 (cls :: k2
-> Constraint) (xx :: k1) (a :: Struct cls).
StructI xx a =>
Hom riki a a
Class sig: forall k1 k2 (cls :: k2
-> Constraint) (xx :: k1) (a :: Struct
cls) (ríki :: Struct
cls
-> Struct
cls
-> *).
StructI xx a =>
ríki a a
In the instance declaration for ‘Category (Hom riki)’
T14846.hs:39:31: error:
• Couldn't match kind ‘k3’ with ‘Struct cls2’
‘k3’ is a rigid type variable bound by
the instance declaration
at T14846.hs:37:10-65
When matching kinds
cls1 :: k3 -> Constraint
cls0 :: Struct cls -> Constraint
Expected kind ‘Struct cls0’,
but ‘Structured a cls’ has kind ‘Struct cls1’
• In the first argument of ‘AStruct’, namely ‘(Structured a cls)’
In an expression type signature: AStruct (Structured a cls)
In the expression: struct :: AStruct (Structured a cls)
• Relevant bindings include
i :: Hom riki a a (bound at T14846.hs:39:3)
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