25 lines
431 B
Text
25 lines
431 B
Text
universe variables u
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structure Functor (A : Type u) :=
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(fn : A → A → A) (inj : ∀ x y, fn x = fn y → x = y)
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attribute [instance]
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definition coe_functor_to_fn (A : Type u) : has_coe_to_fun (Functor A) :=
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{ F := λ f, A → A → A,
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coe := Functor.fn }
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constant f : Functor nat
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#check f 0 1
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set_option pp.coercions false
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#check f 0 1
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set_option pp.coercions true
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#check f 0 1
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set_option pp.all true
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#check f 0 1
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