`<ios>`, `<xiosbase>`: Many member functions of `basic_ios` are provided in `ios_base`
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- C++
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Description
Describe the bug
Following member functions of basic_ios are currently provided in ios_base, which is SFINAE-observable, and may invalidate conforming program with a class directly derived from ios_base.
Expected behavior
These functions are not provided by ios_base. Perhaps they should be provided in an intermediate base.
Additional context
Fixes seem ABI-breaking and should be done in vNext.
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 by reviewing the basic_ios and ios_base entry points named in the issue, along with how their member functions are currently exposed. Determine the ABI implications of moving the listed functions and how an intermediate base would affect directly derived ios_base classes. Done means the functions are no longer provided by ios_base, with the ABI-breaking work explicitly scoped for vNext.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- backend-api-design
- Issue type
- Bug
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 25/100