12 lines
362 B
Text
12 lines
362 B
Text
open tactic
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axiom Sorry : ∀ A : Type, A
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inductive Enum : Type | ea | eb | ec | ed
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attribute [instance]
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noncomputable definition Enum_dec_eq : decidable_eq Enum :=
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by do a ← intro `a, cases a,
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b ← intro `b, cases b,
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right >> reflexivity,
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try (do left, h ← intro `H, cases h),
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repeat $ intros >> mk_const `Sorry >>= apply >> skip
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