rcases w with ⟨a, f⟩
α : Type u_1
β : α → Type u_2
inst✝⁴ : Primcodable α
inst✝³ : (a : α) → Fintype (β a)
inst✝² : (a : α) → DecidableEq (β a)
inst✝¹ : (a : α) → Primcodable (β a)
inst✝ : PrimrecCard β
w : WType β
⊢ mkL w.inversion.1 w.inversion.2 = some w
case mk
α : Type u_1
β : α → Type u_2
inst✝⁴ : Primcodable α
inst✝³ : (a : α) → Fintype (β a)
inst✝² : (a : α) → DecidableEq (β a)
inst✝¹ : (a : α) → Primcodable (β a)
inst✝ : PrimrecCard β
a : α
f : β a → WType β
⊢ mkL (mk a f).inversion.1 (mk a f).inversion.2 = some (mk a f)