975271e1a3
@Kha We will probably have to refine the heuristic for hiding the inaccessible names, but the first version is already useful. Here is the error message for a `_` before this commit ``` error: don't know how to synthesize placeholder context: x✝⁴ : List Nat x✝³ : Nat x✝² : x✝⁴ ≠ [] a b x✝¹ : Nat x✝ : [a, b] ≠ [] ⊢ Nat ``` After ``` error: don't know how to synthesize placeholder a b : Nat : [a, b] ≠ [] ⊢ Nat ```
21 lines
544 B
Text
21 lines
544 B
Text
α : Type _
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as bs : List α
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⊢ as ++ bs ++ bs = as ++ (bs ++ bs)
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rewrite.lean:12:20: error: tactic 'rewrite' failed, did not find instance of the pattern in the target expression
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List.reverse (List.reverse ?m)
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α : Type _
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as bs : List α
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⊢ as ++ [] ++ [] ++ bs ++ bs = as ++ (bs ++ bs)
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x y z : Nat
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h₁ : x = y
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h₂ : y = z
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⊢ x = z
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rewrite.lean:31:0: error: tactic 'rewrite' failed, did not find instance of the pattern in the current goal
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x y z : Nat
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h₁ : 0 + x = y
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h₂ : 0 + y = z
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⊢ x = z
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m n k : Nat
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: n = m
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h : k = m
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⊢ k = n
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