<iterator>: Remove stdext::checked_array_iterator and stdext::unchecked_array_iterator by StephanTLavavej · Pull Request #5817 · microsoft/STL (original) (raw)

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Overview

• VS 2022 17.8 released on 2023-11-14 deprecated stdext::checked_array_iterator in C++17 mode.
  • : Modernize and deprecate (un)checked_array_iterator #3818
• VS 2022 17.11 released on 2024-08-13 deprecated stdext::checked_array_iterator unconditionally.
  • Emit 'MS extension' deprecation warnings in all Standard modes #4605

One or two years of deprecation notice is enough. (VS 2022 17.14 and VS 2026 18.0 still support these non-Standard iterators and will be supported for a long time, giving customers plenty of notice and time to migrate.)

These non-Standard iterators make it more difficult to write portable code. They're no longer necessary to avoid obnoxious "output iterator is a raw pointer" warnings from STL algorithms (which we removed a long time ago). gsl::span (available downlevel to C++14) and std::span in C++20 are superior mechanisms, since they act as ranges instead of individual iterators.

Commits

• Remove product code.
• Tombstone the deprecation warning.
• Delete entire tests.
• Remove test coverage.
• Ensure that we never mention these names again.
• Remove unnecessary test usage (originally to silence warnings).

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Programmer-Archaeology

Qt

In #4605 (April 2024), I mentioned that "Qt stopped using stdext::checked_array_iterator and backported that to their various release branches". Here are the specific releases, from examining qtbase/src/corelib/global/qcompilerdetection.h:

• Qt 5.15.17 contains the fix.
  • I believe this was released in May 2024.
• Qt 6.5.5 contains the fix.
  • I believe this was released in March 2024.
• Qt 6.6.1 contains the fix.
  • I believe this was released in November 2023.
• Qt 6.7.0 contains the fix.
  • I believe this was released in April 2024.

aws-sdk-cpp

Fixed in November 2023 by aws/aws-sdk-cpp#2726.

This was referenced

Nov 7, 2025

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