max/lean4-htt
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions 2
Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
32143 commits 1 branch 0 tags 5.3 GiB
Find a file
Joachim Breitner 27b7002138
fix: checkTargets check for duplicate target (#3171) 
The `checkTargets` function introduced in 4a0f8bf2 as
```
  checkTargets (targets : Array Expr) : MetaM Unit := do
    let mut foundFVars : FVarIdSet := {}
    for target in targets do
      unless target.isFVar do
        throwError "index in target's type is not a variable (consider using the `cases` tactic instead){indentExpr target}"
      if foundFVars.contains target.fvarId! then
        throwError "target (or one of its indices) occurs more than once{indentExpr target}"
```
looks like it tries to check for duplicate indices, but it doesn’t
actually, as `foundFVars` is never written to.

This adds
```
      foundFVars := foundFVars.insert target.fvarId!
```
and a test case.

Maybe a linter that warns about `let mut` that are never writen to would
be useful?
2024-01-18 09:44:17 +00:00
.github chore: CI: add actionlint action, fix actions (#3156) 2024-01-15 17:53:04 +00:00
doc doc: mention termination_by and decreasing_by (#3016) 2024-01-10 16:35:19 +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: checkTargets check for duplicate target (#3171) 2024-01-18 09:44:17 +00:00
stage0 chore: update stage0 2024-01-10 17:27:35 +01:00
tests fix: checkTargets check for duplicate target (#3171) 2024-01-18 09:44:17 +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 feat: per-function termination hints 2024-01-10 17:27:35 +01:00
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.