Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
d1e19f2aa0
This PR adds support for `try?` to use induction; it will only perform induction on inductive types defined in the current namespace and/or module; so in particular for now it will not induct on built-in inductives such as `Nat` or `List`. This is stacked on top of #11132, and there are overlapping changes. <!-- CURSOR_SUMMARY --> --- > [!NOTE] > Adds vanilla induction suggestions to `try?`, updates collection of inductive candidates, and tests the new behavior on custom inductive types. > > - **Try tactic pipeline**: > - Add vanilla induction generators (`mkIndStx`, `mkAllIndStx`) that try `induction <var> <;> …`, with fallback via `expose_names` when needed. > - Integrate induction into `mkTryEvalSuggestStx`, alongside existing atomic, suggestions, and function-induction options. > - **Collector updates (`Try/Collect.lean`)**: > - Enhance `checkInductive` to `whnf` the type and use `getAppFn` to detect inductive heads, populating `indCandidates`. > - **Tests**: > - New `tests/lean/run/try_induction.lean` covering suggestions for `induction` on custom inductives, interaction with `grind`, and coexistence with `fun_induction`. > > <sup>Written by [Cursor Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit b357990c97d0855418202626dad3a73cdcae8a86. This will update automatically on new commits. Configure [here](https://cursor.com/dashboard?tab=bugbot).</sup> <!-- /CURSOR_SUMMARY --> --------- Co-authored-by: Claude <noreply@anthropic.com> |
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