Datasets:
| /- | |
| Copyright (c) 2023 Heather Macbeth. All rights reserved. -/ | |
| import Mathlib.Tactic.Use | |
| /-! | |
| In this file we redefine the mathlib `use` tactic so that it does not attempt to | |
| resolve the goals produced by `rfl` (at the "reducible" level). (That is, we | |
| redefine it to have the behaviour of the mathlib `existsi` tactic.) We do this | |
| because of a feature/bug in Lean core whereby all equalities of concrete natural | |
| numbers are reducibly defeq. (See https://github.com/leanprover/lean4/issues/1994.) | |
| -/ | |
| macro_rules | `(tactic| use $es,*) => `(tactic|refine ⟨$es,*, ?_⟩) | |