<string>: Fix construction and insertion of basic_string with volatile ranges
#5409
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StephanTLavavej
approved these changes
Apr 19, 2025
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Thanks! 😻 This diff looked a lot scarier than it actually was - just had to deal with the code movement. Please double-check my |
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I'm mirroring this to the MSVC-internal repo - please notify me if any further changes are pushed. |
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Thanks for fixing everyone's favorite cv-qualifier! 😹 🐱 🐈 |
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Formerly,
(const) volatile CharTarrays were inconsistently handled in legacy iterator pair functions and new functions added in C++23 WG21-P1206R7. In legacy functions,(const) volatile CharT*were not specially treated due to_Is_elem_cptr, but in P1206R7 functions, they were consistently treated with(const) CharT*due to_Contiguous_range_of.This PR chooses to follow the convention of
_Contiguous_range_ofand changes_Is_elem_cptrto_Is_elem_cvptrto handle(const) volatile CharT*. For volatile contiguous ranges, we need to use non-vectorized element-wise assignment.Fixes #5402.