Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
6ca699b1ff
This PR enables the new E-matching pattern inference heuristic for `grind`, implemented in PR #10422. **Important**: Users can still use the old pattern inference heuristic by setting: ```lean set_option backward.grind.inferPattern true ``` In PR #10422, we introduced the new modifier `@[grind!]` for enabling the minimal indexable subexpression condition. This option can now also be set in `grind` parameters. Example: ```lean opaque f : Nat → Nat opaque fInv : Nat → Nat axiom fInv_f : fInv (f x) = x /-- trace: [grind.ematch.pattern] fInv_f: [f #0] -/ #guard_msgs in set_option trace.grind.ematch.pattern true in example {x y} : f x = f y → x = y := by /- The modifier `!` instructs `grind` to use the minimal indexable subexpression (i.e., `f x` in this case). -/ grind [!fInv_f] ``` |
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