Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
ded043bd53
@Kha I am adding a few examples to use in the manual.
This one is a bit ugly due to two issues
1- We can't easily copy the position information from one token to
another. You suggested a notation in the past, but we never
implemented it. In the new example, we must copy the `end` position to
`}` to get the "unsolved goals" error message at the `end` token.
2- The quotation `` `(by { $ts* }) `` doesn't do what we want.
The issue is that we are using `group` instead of `nodeWithAntiquot`
to define `tacticSeqBracketed`. I will have to go over all parsers we
have defined, and check how many other places have this problem.
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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.