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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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Joachim Breitner aeea7fdf5d
fix: List.length_pos no @[simp] (#4172) 
in #4158 I was experimenting with a change to the simplifier that
affectes the order in which lemmas were tried, and of course it breaks
proofs all over the place whenever we have a non-confluent simp set.

Among the first breakages encountered, a large fraction was due to
`simp` rewriting with `List.length_pos  : 0 < length l ↔ l ≠ []`.

This does not strike me a as a good simp lemma: If `l` is a manifest
constructor, the simplifier will reduce `length` and solve it anyways,
and if it isn't then an inequality usually isn’t very simp friendly. It
is also highly non-confluent with any kind of `length`-lemma we might
have.

This therefore removes it from the standard simp set.
2024-05-15 13:28:54 +00:00
.github chore: rerun CI only when full-ci label is added or removed (#4136) 2024-05-13 16:40:36 +00:00
doc chore: Std -> Batteries renaming (#4108) 2024-05-08 05:04:25 +00:00
images chore(CMakeLists.txt): move Lean logo to make sure we can test leanemacs without installing Lean 2015-01-31 17:38:49 -08:00
nix chore: add ./script/rebase-stage0.sh (#3984) 2024-05-02 12:26:25 +00:00
script chore: add ./script/rebase-stage0.sh (#3984) 2024-05-02 12:26:25 +00:00
src fix: List.length_pos no @[simp] (#4172) 2024-05-15 13:28:54 +00:00
stage0 chore: update stage0 2024-05-14 19:52:25 +02:00
tests feat: grind preprocessor skeleton (#4170) 2024-05-15 04:25:22 +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 chore: update-stage0-commit cmake target (#3692) 2024-04-04 13:35:53 +00:00
CODEOWNERS chore: update code owners 2024-04-24 10:16:16 +02:00
CONTRIBUTING.md doc: Adjust contributor's docs to squash merging (#2927) 2023-11-21 10:13:43 +00:00
flake.lock chore: test results as job summary (#3715) 2024-03-27 10:14:33 +00:00
flake.nix chore: replace shell.nix with a devShell in flake.nix (#3717) 2024-03-21 13:24:01 +00:00
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: mention build doc source location (#4045) 2024-05-01 22:42:54 +00:00
RELEASES.md feat: well-founded definitions irreducible by default (#4061) 2024-05-10 06:45:21 +00:00

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