Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
6e5cd5fcc0
@Kha I kept `TokenInfo` as is. That is, the `lbp` field is still `Option Nat`. I changed my mind because we have the combinator `NonReservedSymbol`. It feels weird to have a combinator that does not create a keyword, but sets the `lbp`. Recall that it is used at `Lean/Parser/Tactic.lean`. Other observations: - We use symbols in auxiliary constructions (e.g., `mkAntiquot`). It feels weird to set their `lbp` there. - It felt weird to specify the `lbp` in places such as ``` def structCtor := parser! ident >> optional inferMod >> symbol " :: " 67 ``` - We have a few parsing rules where the same symbol appears twice. It is funny to set the `lbp` twice. Note that the approach we discussed yesterday (retrieving the `lbp` from the `Environment`) would not work here. |
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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.