258d3725e7
This PR changes the signature of `Array.set` to take a `Nat`, and a tactic-provided bound, rather than a `Fin`. Corresponding changes (but without the auto-param) for `Array.get` will arrive shortly, after which I'll go more pervasively through the Array API.
17 lines
440 B
Text
17 lines
440 B
Text
def f (a : Array Nat) (i : Nat) (v : Nat) (h : i < a.size) : Array Nat :=
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a.set i (a.get ⟨i, h⟩ + v)
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set_option pp.proofs true
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theorem ex1 (h₃ : i = j) : f a i (0 + v) h₁ = f a j v h₂ := by
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simp
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trace_state
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simp [h₃]
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theorem ex2 (h₃ : i = j) : f a (0 + i) (0 + v) h₁ = f a j v h₂ := by
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simp
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trace_state
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simp [h₃]
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theorem ex3 (h₃ : i = j) : f a (0 + i) (0 + v) h₁ = f a j v h₂ := by
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simp [h₃]
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