Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
cf527e05bd
This PR implements a `finally` section following a (potentially empty) `where` block. `where ... finally` opens a tactic sequence block in which the goals are the unassigned metavariables from the definition body and its auxiliary definitions that arise from use of `let rec` and `where`. This can be useful for discharging multiple proof obligations in the definition body by a single invocation of a tactic such as `all_goals`: ```lean example (i j : Nat) (xs : Array Nat) (hi : i < xs.size) (hj: j < xs.size) := match i with | 0 => x | _ => xs[i]'?_ + xs[j]'?_ where x := 13 finally all_goals assumption ``` --------- Co-authored-by: Sebastian Graf <sg@lean-fro.org> |
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