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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 ce73bbe277
feat: detailed feedback on decide tactic failure (#4674) 
When the `decide` tactic fails, it can try to give hints about the
failure:
- It tells you which `Decidable` instances it unfolded, by making use of
the diagnostics feature.
- If it encounters `Eq.rec`, it gives you a hint that one of these
instances was likely defined using tactics.
- If it encounters `Classical.choice`, it hints that you might have
classical instances in scope.
- During this, it tries to process `Decidable.rec`s and matchers to pin
blame on a particular instance that failed to reduce.

This idea comes from discussion with Heather Macbeth [on
Zulip](https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/Decidable.20with.20structures/near/449409870).
2024-07-11 20:08:29 +00:00
.github chore: CI: update download-artifact actions 2024-07-09 10:17:19 +02:00
doc doc: update release checklist for new release notes workflow (#4458) 2024-07-09 21:44:15 +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: detailed feedback on decide tactic failure (#4674) 2024-07-11 20:08:29 +00:00
stage0 chore: update stage0 2024-07-08 20:22:24 +00:00
tests feat: detailed feedback on decide tactic failure (#4674) 2024-07-11 20:08:29 +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).