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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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Joe Hendrix 903493799d
fix: reduceNat? match terms with free or meta variables (#3139) 
This removes checks in `Lean.Meta.reduceNat?` that caused it to fail on
terms it could handle because they contain meta variables in arguments.
This lead to those operations being reduced using their equational
definitions and slow performance on large patterns:

```
set_option profiler true
set_option profiler.threshold 1

def testMod (x:Nat) :=
  match x with
  | 128 % 1024 => true
  | _ => false
-- elaboration took 3.02ms

def testMul (x:Nat) :=
  match x with
  | 128 * 1 => true
  | _ => false
-- type checking took 11.1ms
-- compilation of testMul.match_1 took 313ms
-- compilation of testMul took 65.7ms
-- elaboration took 58.9ms
```

Performance is slower on `testMul` than `testMod` because `whnf` ends up
evaluateing `128 * 1` using Peano arithmetic while `128 % 1024` is able
to avoid that treatment since `128 < 1024`.
2024-01-05 18:08:26 +00:00
.github chore: Netlify deployment for manual (#3138) 2024-01-04 18:07:46 +00:00
doc doc: avoid universe issue in example type class code (#3098) 2023-12-21 16:57:26 +00:00
images
nix chore: set warningAsError in CI only (#3030) 2023-12-06 08:18:39 +00:00
script chore: refactor pr release workflow (#3020) 2023-12-12 00:45:10 +00:00
src fix: reduceNat? match terms with free or meta variables (#3139) 2024-01-05 18:08:26 +00:00
stage0 chore: update stage0 2023-12-21 12:02:01 +00:00
tests fix: reduceNat? match terms with free or meta variables (#3139) 2024-01-05 18:08:26 +00:00
.gitattributes chore: Do not hide stage0/src/stdlib_flags.h from diffs 2023-09-13 19:29:25 +02:00
.gitignore chore: update tests to account for .lake 2023-11-13 20:31:24 -05:00
.ignore chore: ignore stage0/ (for rg etc.) 2022-03-18 15:28:20 +01:00
CMakeLists.txt feat: embed and check githash in .olean (#2766) 2023-11-27 10:24:43 +00:00
CODEOWNERS doc: widget code owner 2023-12-01 15:46:45 +00:00
CONTRIBUTING.md doc: Adjust contributor's docs to squash merging (#2927) 2023-11-21 10:13:43 +00:00
default.nix doc: setup 2021-01-03 13:21:58 +01:00
flake.lock chore: Nix bump to LLVM 15 2023-07-28 10:56:54 +02:00
flake.nix chore: Nix: use strings instead of URL literals (#2172) 2023-03-28 10:10:24 +02:00
lean-toolchain doc: VS Code dev setup (#2961) 2023-11-30 08:35:03 +00:00
lean.code-workspace chore: add the lean4 extension to the vscode workspace (#3059) 2023-12-14 08:58:21 +00:00
LICENSE chore: remove LICENSE header that confused GitHub 2021-11-18 09:42:35 +01:00
LICENSES chore: add GMP license for now 2021-11-18 09:42:35 +01:00
README.md doc: Update contribution guides (#2624) 2023-10-25 13:05:55 +11:00
RELEASES.md chore: begin development cycle for v4.6.0 (#3109) 2023-12-21 22:39:04 +00:00
shell.nix chore: Nix bump to LLVM 15 2023-07-28 10:56:54 +02:00

README.md

This is the repository for Lean 4.

We provide nightly releases and have just begun regular stable point releases.

About

Installation

See Setting Up Lean.

Contributing

Please read our Contribution Guidelines first.

Building from Source

See Building Lean.