[dcl.friend] Specify where a friend specifier can appear
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Description
In the current standard, the specification regarding the friend specifier is too brief.
The friend specifier is used to specify access to class members; see [class.friend].
Unlike other specifiers, which are specified where they can appear. For example
The mutable specifier shall appear only in the declaration of a non-static data member ([class.mem]) whose type is neither const-qualified nor a reference type.
The virtual specifier shall be used only in the initial declaration of a non-static member function; see [class.virtual].
[class.friend] says nothing about this part. In order to make it clear where a friend specifier can appear, [dcl.friend] might be changed to
The friend specifier shall appear only in a member-declaration. It is used to specify access to class members; see [class.friend].
Contributor guide
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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 at the [dcl.friend] section and compare its wording with the cited [class.mem] and [class.virtual] specifier rules. Check that the section explicitly states where the friend specifier can appear and preserves its existing purpose; the issue is done when the standard text resolves that omission.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- tex
- Domain
- documentation
- Issue type
- Documentation
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Clearly specified
- Newbie friendliness
- 42/100