Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
e844a5be74
Remove `AbstractMetavarContext` and `TmpMetavarContext`. Disable `TypeUtil` until we decide this is the right design. Using very simple approach: - No distinction betwen temporary and regular metavariables. - Metavariables have a `depth` Nat field. - MetavarContext also has a `depth` field. - We bump the `MetavarContext` depth when we create a nested problem. Example: Elaborator (depth = 0) -> Simplifier matcher (depth = 1) -> TC (level = 2) -> TC (level = 3) -> ... - When MetavarContext is at depth N, isDefEq does not assign variables from depth < N. - Metavariables from depth N+1 must be fully assigned before we return to level N. - New design even allows us to invoke tactics from TC. cc @dselsam |
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| lean4-mode | ||
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| tmp/new-frontend | ||
| .appveyor.yml | ||
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| .gitattributes | ||
| .gitignore | ||
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| azure-pipelines.yml | ||
| default.nix | ||
| LICENSE | ||
| README.md | ||
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We are currently developing Lean 4. Lean 3 is still the latest official release. This repository contains work in progress.
Important. Unless you are one of our collaborators
- We strongly suggest you use Lean 3.
- Pull requests are not welcome.
- New issues are not welcome, and will be closed without any feedback.