42 lines
1.2 KiB
Text
42 lines
1.2 KiB
Text
import Lean
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universe u
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inductive Pred : ∀ (α : Type u), List α → Type (u+1)
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| foo {α : Type u} (l1 : List α) (l2 : List (Option α)) : Pred (Option α) l2 → Pred α l1
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axiom goal : forall (α : Type u) (xs : List (List α)) (h : Pred (List α) xs), xs ≠ [] → xs = xs
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open Lean
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open Lean.Meta
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def tst1 : MetaM Unit := do
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let cinfo ← getConstInfo `goal;
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let type := cinfo.type;
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let mvar ← mkFreshExprMVar type;
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trace[Elab] (MessageData.ofGoal mvar.mvarId!);
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let (_, mvarId) ← mvar.mvarId!.introN 2;
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let (fvarId, mvarId) ← mvarId.intro1;
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trace[Elab] (MessageData.ofGoal mvarId);
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let s ← generalizeIndices mvarId fvarId;
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trace[Elab] (MessageData.ofGoal s.mvarId);
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pure ()
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set_option trace.Elab true
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/--
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trace: [Elab] ⊢ ∀ (α : Type u) (xs : List (List α)) (h : Pred (List α) xs), xs ≠ [] → xs = xs
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[Elab] α✝ : Type u
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xs✝ : List (List α✝)
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h✝ : Pred (List α✝) xs✝
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⊢ xs✝ ≠ [] → xs✝ = xs✝
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[Elab] α✝ : Type u
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xs✝ : List (List α✝)
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h✝¹ : Pred (List α✝) xs✝
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α : Type u
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a✝ : List α
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h✝ : Pred α a✝
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⊢ List α✝ = α → xs✝ ≍ a✝ → h✝¹ ≍ h✝ → xs✝ ≠ [] → xs✝ = xs✝
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-/
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#guard_msgs in
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#eval tst1
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