lean-ja / lean-ja/lean-by-example
Decidable 型クラスはなぜTypeに属するのですか？Propだと何が困るのですか？
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- Lean
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Description
こういう常識的なところをきちんと詰めて説明するべきだと思う。decide : P → Bool 関数を実装するとき、これは「命題からデータを取り出している」ので、Type でなければいけないはず。
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.
Research direction
No file, test, or documentation entry point is named in the issue. Start by locating the existing explanation of Decidable and Prop in the repository, then document why the class belongs in Type rather than Prop and what goes wrong when a decision procedure extracts data from a proposition.
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Assessment
- Domain
- documentation
- Issue type
- Documentation
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100