Remove non-Standard basic_istream::ipfx()/isfx(), basic_ostream::opfx()/osfx(), and locale::empty() by StephanTLavavej · Pull Request #5834 · microsoft/STL (original) (raw)

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StephanTLavavej commented

Nov 8, 2025

Let's finish cleaning house.

• basic_istream::ipfx()/isfx() and basic_ostream::opfx()/osfx() were deprecated since VS 2022 17.9 in February 2024 (for C++17 and later) and VS 2022 17.11 in August 2024 (unconditionally).
  • , : Deprecate pre-Standard ipfx, isfx, opfx, and osfx functions #4006
  • Emit 'MS extension' deprecation warnings in all Standard modes #4605
• locale::empty() was deprecated since VS 2022 17.14 in May 2025.
  • : Deprecate non-Standard locale::empty() #5197

I've verified that the DLL's export surface is unchanged.

There appears to have been virtually zero usage; I see no occurrences of the silencing macros in our internal or Real World Code test suites (modulo preprocessed files), which is why I'm being a bit more aggressive here.

Although we shouldn't ever need to change them, I'm keeping the comments on the function definitions. However, the comment on the declaration of locale::empty() serves no purpose, so I'm removing it.

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