acb188f11c
This attribute, which was implemented in #3640, is applied to the following structures: `Sigma`, `PSigma`, `PProd`, `And`, `Subtype`, and `Fin`. These were given this attribute in Lean 3.
10 lines
294 B
Text
10 lines
294 B
Text
α : Type ?u
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x✝ : ArrayBuffer α
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cap : Nat
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backing : Fin cap → Option α
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size : Nat
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h_size : size ≤ cap
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h_full : ∀ (i : Nat) (h : i < size), Option.isSome (backing ⟨i, ⋯⟩) = true
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i : Nat
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h : i < size
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⊢ Option.isSome (if h_1 : i < cap then backing ⟨i, ⋯⟩ else none) = true
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