VS 2022 17.5

• Merged C++23 features:
  • P2322R6 #3099 ranges::fold_left, ranges::fold_right, etc.
  • P2465R3 #3108 Standard Library Modules std And std.compat
    • Initially supported for MSVC only; see tracking issue #1694 for lists of known compiler bugs and upcoming fixes.
    • Build system support is a work in progress; currently, build systems must be manually taught to compile std.ixx so you can reference std.ifc and link std.obj. (Similarly for building std.compat.ixx into std.compat.ifc and std.compat.obj.)
    • IntelliSense support is a work in progress; STL test coverage is not yet enabled.
    • Will be supported for Clang after compiler support for modules is available; see Clang's C++20 implementation status.
  • P2508R1 #3074 basic_format_string, format_string, wformat_string
• Merged partial C++23 features:
  • P2278R4 cbegin Should Always Return A Constant Iterator:
    • The "Iterators" section, including basic_const_iterator, make_const_iterator(), and make_const_sentinel(). #3043
  • P2321R2 zip:
    • views::zip. #3035
    • Note: views::zip_transform, views::adjacent, and views::adjacent_transform are the parts that remain to be implemented.
• Merged LWG issue resolutions:
  • LWG-3711 #2949 Missing preconditions for slide_view constructor
  • LWG-3788 #3130 jthread::operator=(jthread&&) postconditions are unimplementable under self-assignment
• Fixed bugs:
  • Fixed compiler warnings when using Standard Library Header Units. #3069
  • Removed a non-Standard member function locale::c_str(). #3088
  • Fixed narrowing warnings when calling piecewise_constant_distribution<float>::densities() and piecewise_linear_distribution<float>::densities(). #3107
  • Fixed compiler errors when calling ranges::is_permutation with predicates that return highly unusual boolean-testable types. #3113
  • Fixed compiler errors when building the Standard Library Modules with static RTTI disabled. #3115
    • Now, building std.ixx with /GR- /D_HAS_STATIC_RTTI=0 will succeed, and std::any will simply be unavailable (as it inherently requires static RTTI).
    • Additionally, including <any> with static RTTI disabled will emit a warning message but not an error, and the feature-test macro __cpp_lib_any will indicate (by its absence) that the feature is unavailable.
  • Fixed compiler errors in reference_wrapper, thread, and variant involving incomplete types. #3101 #3148
  • When chrono::time_zone::get_info() throws an exception, fixed it to report GetLastError() as intended, instead of "The operation completed successfully." #3122
  • Fixed incorrect results returned by ellint_2(). #3077
  • Fixed error_category's default constructor to be constexpr. #3139 #3176
  • Fixed all headers to avoid emitting the off-by-default "warning C5262: implicit fall-through occurs here; are you missing a break statement? Use [[fallthrough]] when a break statement is intentionally omitted between cases". #3162
  • Fixed compiler errors in certain <ranges> scenarios by properly constraining movable-box's copy constructors. #3171
• Improved performance:
  • Added support for unwrapping to move_sentinel. #3098
  • Improved the performance of uniform_int_distribution by implementing Daniel Lemire's algorithm Fast Random Integer Generation in an Interval. #3012
  • Optimized gcd() to avoid a redundant shift. #3127
  • Optimized locale::classic() for a 10x speedup (times, not percent). #3048
  • Added an attribute to move(), forward(), move_if_noexcept(), and forward_like() that will allow the MSVC compiler to intrinsically implement them without emitting function calls. #3182
• Improved throughput:
  • Significantly improved compile times for <variant> visit(). #3070
  • <format> now includes fewer headers. #3128
  • Moved random number generator machinery out of <xutility>, one of the STL's central internal headers. #3157
• Enhanced behavior:
  • Clarified get_future()'s [[nodiscard("message")]]. #3068
  • The internal headers <xatomic.h>, <xbit_ops.h>, and <xerrc.h> are now core headers. #3116
  • Improved <format>'s compiler error messages for unformattable types. #3080
• Improved test coverage:
  • Added test coverage for <variant> visit() invoking pointers to members. #3070
  • Expanded test coverage for forward_like(). #3072
  • Updated test coverage for views::as_rvalue. #3089
  • Expanded test coverage for bind_front() and bind_back(). #3117
  • Updated our LLVM submodule reference, including new tests, and updates to the any/optional/variant shared test code. #2976
  • Fixed bogus test code discovered by Clang 15. #3135
  • Fixed the off-by-default "exhaustive" mode of the parallel is_partitioned() test. #3174
• Code cleanups:
  • Various cleanups (described in detail in the PRs, not repeated here). #3082 #3083 #3084 #3085 #3086 #3090 #3091 #3092 #3093 #3177 #3178
  • Improved Python scripts. #3123
  • Removed compiler bug workarounds. #3155
  • Moved <atomic> implementation details, preparing for later changes. #3124
  • Removed unnecessary partial specializations of common_type for the STL's internal 128-bit integer-class types. #3153
• Infrastructure improvements:
  • The PR/CI system now uses spot VMs again. #3071
  • Configured Azure Pipelines to avoid running checks for draft PRs. #3078
  • Added GitHub Actions to allow contributors to move their PR cards in the Code Reviews project. #2584
  • Updated dependencies. #3104 #3155
    • Updated build compiler to VS 2022 17.4 Preview 3.
    • Updated Boost.Math to 1.80.0 (now also used by the MSVC-internal build). #3077
    • Updated Clang to 15.0.1 (now required).
    • Updated CMake to 3.24 (now required).
    • Updated Google Benchmark to 1.7.0. #3151
    • Updated Python to 3.10.8.
• Updated _MSVC_STL_UPDATE. #3073 #3147