30 lines
879 B
Text
30 lines
879 B
Text
example (h : False) : False := by
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fail_if_success
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simp (config := { failIfUnchanged := true })
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cases h
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example (h : (a :: [b]).length = 3) : False := by
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fail_if_success
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simp (config := { failIfUnchanged := true }) only at h
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simp (config := { failIfUnchanged := false }) only at h
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simp (config := { failIfUnchanged := true }) at h
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example (h : False) : False := by
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fail_if_success
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dsimp (config := { failIfUnchanged := true })
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cases h
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example (_h : 37 = 37) (w : Nonempty False) : False ∨ False := by
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-- removes `_h` and simplifies the goal
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simp_all (config := { failIfUnchanged := true })
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-- Now should fail, because it can't do anything.
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fail_if_success
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simp_all (config := { failIfUnchanged := true })
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cases w with
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| intro w => cases w
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example (h : False) : 7 = 8 := by
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simp (config := { failIfUnchanged := true })
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cases h
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