Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
b308f2bb55
Modifies `simp` to elaborate all simp arguments without disabling error recovery. Like in #4177, simp arguments with elaboration errors are not added to the simp set. Error recovery is still disabled when `simp` is used in combinators such as `first`. This enables better term info and features like tab completion when there are elaboration errors. Also included is a fix to the `all_goals` and `<;>` tactic combinators. Recall that `try`/`catch` for the Tactic monad restores the state on failure. This meant that all messages were being cleared on tactic failure. The fix is to use `Tactic.tryCatch` instead, which doesn't restore state. Part of addressing #3831 Closes #4888 |
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