Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
c4d9573342
This PR adds warnings when registering `@[simp]` theorems whose left-hand side has a problematic head symbol in the discrimination tree: - **Variable head** (`.star` key): The theorem will be tried on every `simp` step, which can be expensive. The warning notes this may be acceptable for `local` or `scoped` simp lemmas. Controlled by `warning.simp.varHead` (default: `true`). - **Unrecognized head** (`.other` key, e.g. a lambda expression): The theorem is unlikely to ever be applied by `simp`. Controlled by `warning.simp.otherHead` (default: `true`). |
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