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Poor elaboration performance on structure matches #37

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eric-wieser opened this issue Feb 20, 2024 · 0 comments

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eric-wieser commented Feb 20, 2024

This takes a very long time to elaborate:

import Lean
import Qq

open Lean Qq

def ohNo : MetaM Unit := do
  let xx ← inferTypeQ q(False)
  let res ← match xx with
  | ⟨0, ~q(True), _⟩ => return
  | ⟨0, ~q(True), _⟩ => return
  | ⟨0, ~q(True), _⟩ => return
  | ⟨0, ~q(True), _⟩ => return
  | ⟨0, ~q(True), _⟩ => return
  | ⟨0, ~q(True), _⟩ => return
  | _ => return

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