`<istream>`, `<ostream>`: Deprecate pre-Standard `ipfx`, `isfx`, `opfx`, and `osfx` functions#4006

Merged

StephanTLavavej merged 3 commits intomicrosoft:mainfrom frederick-vs-ja:deprecate-io-pfx-sfx

Sep 14, 2023

+18-5

Commits on Sep 3, 2023