Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
313abdb49f
This PR fixes the handling of anonymous dependent `if` (`if _ : cond then ... else ...`) inside `do` blocks when using the new do elaborator. The `_%$tk` binder pattern was incorrectly quoted as `$(⟨tk⟩):hole` in the generated `dite` syntax, causing "elaboration function for `termDepIfThenElse` has not been implemented" errors. The fix quotes it correctly as `_%$tk`. A test case is added to verify both anonymous (`if _ : ...`) and named (`if h : ...`) dependent `if` work in do blocks. --------- Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com> |
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