21 lines
683 B
Text
21 lines
683 B
Text
import Lean
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def g {α : Sort u} (a : α) := a
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open Lean Meta Elab Tactic Grind in
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elab "grind_test" : tactic => withMainContext do
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let declName := (← Term.getDeclName?).getD `_main
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Meta.Grind.preprocessAndProbe (← getMainGoal) declName do
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let nodes ← filterENodes fun e => return e.self.isAppOf ``g
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logInfo (nodes.toList.map (·.self))
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-- `grind` final state must contain only two `g`-applications
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/--
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info: [g (a, b), g (g (a, b))]
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---
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warning: declaration uses 'sorry'
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-/
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#guard_msgs in
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example {β : Type v} {α : Type u} (a c : α) (b d : β) : g.{max u v + 1} (a, b) = (c, d) → g (g.{max (u+1) (v+1)} (a, b)) = (c, d) → False := by
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grind_test
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sorry
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