leanprover / leanprover/reference-manual
nested anonymous constructor syntax
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Description
Reading the section https://lean-lang.org/doc/reference/latest/The-Type-System/Inductive-Types/#anonymous-constructor-syntax left me wonder about the feature where one can omit the nesting of these constructors, at least sometimes?
(If it is documented elsewhere a pointer from this section would help.)
I noticed this while discussing https://github.com/leanprover/lean4/issues/6555.
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
Start with the Anonymous Constructor Syntax section in the linked reference manual and read the discussion in leanprover/lean4#6555. Determine what nested anonymous constructor behavior the issue is asking about and whether it is documented elsewhere. Done means the behavior is explained in the relevant section or a pointer is added to its existing documentation.
Written by the indexing model from the issue text.
Assessment
- Domain
- documentation
- Issue type
- Documentation
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100