Test "corner-cases/eta-unit-like-proof-field"
Expected: 🤷 either · Size: 6.5 KB · Lines: 111 · lean4export: 3.1.0 · Lean: 4.34.1 · 📄 Declaration · 🔗 Source
Unit-like eta for a structure in Type whose only field is a proof of True.
The official kernel applies eta for unit-like types (any two inhabitants are
convertible) only to structures without fields. With that criterion,
conversion is not transitive: both p and q are convertible to the
same canonical inhabitant (e.g. fun _ => () or ⟨()⟩), but not to each
other. Extending the criterion to Pi types whose codomain is unit-like and
to structures whose fields are all proofs or unit-like fixes that. The
official kernel may adopt this, see https://github.com/leanprover/lean4/pull/15372,
https://github.com/leanprover/lean4/issues/2258 and the overall plan in
https://github.com/leanprover/lean4/issues/14977.
| Checker | Result | ⏱️ | 🧠 | |||
|---|---|---|---|---|---|---|
| sokonanoda | ✋ | 1 ms | 40.3 MB | |||
| mathgraph | ✋ | 1 ms | 33.8 MB | |||
| nanoclo | ✋ | 1 ms | 45.9 MB | |||
| con-ron | ✋ | 23 ms | 58.8 MB | |||
| nanobruijn | ✋ | 1 ms | 11.5 MB | |||
| nanoda | ✋ | 1 ms | 3.3 MB | |||
| lazylean | ✋ | 1 ms | 21.6 MB | |||
| con-leche | ✋ | 4 ms | 22.4 MB | |||
| eink0rn | ✋ | 1 ms | 12.4 MB | |||
| official | ✋ | 28 ms | 67.0 MB | |||
| ind-models | ✋ | 100 ms | 104.2 MB | |||
| lean4lean | ✋ | 74 ms | 105.2 MB | |||
| tenet | ✋ | 135 ms | 45.0 MB | |||
| tenet-hs | ✋ | 1 ms | 9.1 MB | |||
| lean4cobol | ✋ | 4 ms | 13.6 MB | |||
| evmlean | ✋ | 1.6 s | 276.3 MB | |||
| mini | ✋ | 34 ms | 74.0 MB | |||
| overfull | ✋ | 14.2 s | 46.4 MB | |||
| metalean-slow | ✋ | 30 ms | 71.7 MB | |||
| tenet-jvm | ✋ | 114 ms | 65.7 MB | |||
| nanoclo-fortran | ✋ | 1 ms | 4.5 MB | |||
| kiota | ✋ | 1 ms | 7.2 MB | |||
| metalean-fast | ✋ | 30 ms | 72.2 MB | |||
| canonical-min | 🚫 | 387 ms | 1.1 GB | |||
| rpylean | ✋ | 1 ms | 4.4 MB | |||
| vow-lean-kernel | ✋ | 80 ms | 8.6 MB | |||
| parse-only | 👍 | 28 ms | 66.2 MB |