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Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
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Leonardo de Moura 253c10c398
fix: normalize Nat.cast and Int.cast of numerals in grind (#9901) 
This PR ensures that `Nat.cast` and `Int.cast` of numerals are
normalized by `grind`.
It also adds a `simp` flag for controlling how bitvector literals are
represented. By default, the bitvector simprocs use `BitVec.ofNat`. This
representation is problematic for the `grind ring` and `grind cutsat`
modules. The new flag allows the use of `OfNat.ofNat` and `Neg.neg` to
represent literals, consistent with how they are represented for other
commutative rings.

Closes #9321
2025-08-14 02:04:55 +00:00
.github chore: CI: include tests in rebootstrap check (#9788) 2025-08-07 15:37:36 +00:00
doc doc: freshen up Mac OSX build instructions (#9618) 2025-07-29 21:42:24 +00:00
images
nix chore: fix Nix build 2025-04-21 18:40:11 +02:00
releases_drafts chore: updates to release_checklist.md (#7817) 2025-04-04 03:45:36 +00:00
script fix: unfoldReducible in grind (#9813) 2025-08-10 00:02:05 +00:00
src fix: normalize Nat.cast and Int.cast of numerals in grind (#9901) 2025-08-14 02:04:55 +00:00
stage0 chore: update stage0 2025-08-12 21:07:52 +00:00
tests fix: normalize Nat.cast and Int.cast of numerals in grind (#9901) 2025-08-14 02:04:55 +00:00
.gitattributes
.gitignore feat: further release automation (#9092) 2025-06-30 05:44:10 +00:00
.gitpod.Dockerfile chore: add gitpod configuration (#6382) 2024-12-15 21:38:13 +00:00
.gitpod.yml chore: add gitpod configuration (#6382) 2024-12-15 21:38:13 +00:00
.ignore
CMakeLists.txt chore: compile stage 0 against correct version string (#9085) 2025-06-29 20:52:46 +00:00
CMakePresets.json chore: fix reldebug preset (#8051) 2025-04-23 10:05:11 +00:00
CODEOWNERS chore: make datokrat code owner for iterators, ranges and slices (#9667) 2025-08-01 17:34:43 +00:00
CONTRIBUTING.md
flake.lock chore: robustify Nix shell (#8141) 2025-04-28 15:08:32 +00:00
flake.nix chore: robustify Nix shell (#8141) 2025-04-28 15:08:32 +00:00
lean-toolchain
lean.code-workspace
LICENSE
LICENSES
README.md chore: remove old documentation site (#7974) 2025-05-14 14:31:33 +00:00
RELEASES.md chore: updates to release_checklist.md (#7817) 2025-04-04 03:45:36 +00:00

README.md

This is the repository for Lean 4.

About

Installation

See Setting Up Lean.

Contributing

Please read our Contribution Guidelines first.

Building from Source

See Building Lean.