Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
880f1372bd
@Kha The default value (false) for `pp.inaccessibleNames == false` help when visualizing error messages (see test `hidingInaccessibleNames.lean`). We added this feature after to hide intermediate variables created by `match_syntax`. However, this default value confused me in tactic mode. For example, it will hide a hypotheses `x : Fin 0` if nobody depends on it, but as a user we want to know we have it since we can close the goal using it. Thus, I added `withPPInaccessibleNames act`, it executes `act` using `pp.inaccessibleNames true` if the user did not explicitly set it. I use this combinator at `FileWorker` and when producing the `unsolved goals` error message. In all other scenarios, I believe hiding these inaccessible variables is a good thing. |
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This is the repository for Lean 4, which is currently being released as milestone releases towards a first stable release. Lean 3 is still the latest stable release.
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