lean-ja / lean-ja/lean-by-example
Subtype の使用場面について書く
Open
@Seasawher is already working on this.
Since May 19, 2026.
- #2321 by @copilot-swe-agent — closed without merging
データ型
- Dominant language
- Lean
- Stars
- 188
- Forks
- 15
- Avg merge
- 9h 8m
- Merged PRs (30d)
- 6
Description
典型的な用途
-
関数の返り値の型を Subtype にして、証明をバンドルする。これにより関数の停止性の証明などが上手くいくことがある。
-
オーバーヘッドなしに部分集合を表現したいとき
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Assessment
This issue has not been assessed yet.