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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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Kyle Miller 7602265923
feat: make @[ext] derive ext_iff theorems from user ext theorems (#4543) 
This PR refactors the 'ext' attribute and implements the following
features:
- The 'local' and 'scoped' attribute kinds are now usable.
- The attribute realizes the `ext`/`ext_iff` lemmas when they do not
already exist, rather than always generating them. This is useful in
conjunction with `@[local ext]`.
- Adding `@[ext]` to a user ext lemma now realizes an `ext_iff` lemma as
well; formerly this was only for structures. The name of the generated
`ext_iff` theorem for a user `ext` theorem named `A.B.myext` is
`A.B.myext_iff`. If this process leads to an error, the user can write
`@[ext (iff := false)]` to disable this feature.

Breaking changes:
- Now the "x" and "y" term arguments to the realized `ext` and `ext_iff`
lemmas are implicit.
- Now the realized `ext` and `ext_iff` lemmas are protected.

Bootstrapping notes:
- There are a few `ext_iff` lemmas to address after the next stage0
update.

Closes https://github.com/leanprover/lean4/issues/3643

Suggested by Floris [on
Zulip](https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/.22Missing.20Tactics.22.20list/near/446267660).
2024-07-08 19:37:56 +00:00
.github chore: bump actions/checkout and actions/upload-artifacts (#4664) 2024-07-07 20:26:59 +00:00
doc chore: add step to release checklist (#4693) 2024-07-08 18:58:18 +00:00
images
nix fix: Add linking of -lStd back into nix build flags on darwin (#4587) 2024-06-29 08:12:57 +00:00
releases_drafts feat: add a linter for local vars that clash with their constructors (#4301) 2024-06-14 13:03:09 +00:00
script feat: support Lake for building Lean core oleans (#3886) 2024-06-13 16:18:24 +00:00
src feat: make @[ext] derive ext_iff theorems from user ext theorems (#4543) 2024-07-08 19:37:56 +00:00
stage0 chore: update stage0 2024-07-08 21:18:50 +02:00
tests feat: make @[ext] derive ext_iff theorems from user ext theorems (#4543) 2024-07-08 19:37:56 +00:00
.gitattributes chore: Do not hide stage0/src/stdlib_flags.h from diffs 2023-09-13 19:29:25 +02:00
.gitignore feat: support Lake for building Lean core oleans (#3886) 2024-06-13 16:18:24 +00:00
.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
CMakePresets.json chore: modernize build instructions (#4032) 2024-05-23 10:55:07 +00:00
CODEOWNERS chore: update codeowners (#4681) 2024-07-08 07:57:54 +00:00
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: nix shell: add gdb (#4476) 2024-06-18 11:07:20 +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 chore: begin development cycle for v4.11.0 (#4594) 2024-06-30 23:28:48 +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 (documentation source: doc/make/index.md).