STL

This shipped in VS 2026 18.0.

• The STL no longer supports targeting Windows 7 / Server 2008 R2, Windows 8 / Server 2012, and Windows 8.1 / Server 2012 R2:
  • Improved the performance of system_clock::now() and atomic::wait() by directly calling APIs that were added in Windows 8. #5432 #5496
  • I...

• Merged C++26 features:
  • P3323R1 #5213 Forbid atomic<cv T>, Specify atomic_ref<cv T>
• Merged partial C++26 features:
  • P3471R4 #5274 Standard Library Hardening
    • Currently disabled by default.
    • This can be enabled (for any...

• Merged C++23 features:
  • P2502R2 #4953 <generator>: Synchronous Coroutine Generator For Ranges
    • P2787R1 pmr::generator
• Merged C++23 Defect Reports:
  • P3107R5 #4821 Permit An Efficient Implementation O...

• Merged C++26 features:
  • P0952R2 #4740 #4850 A New Specification For generate_canonical()
  • P2407R5 #4743 Freestanding Library: Partial Classes
  • P2833R2 [#4743](...

• Merged C++26 features:
  • P2875R4 #4532 Undeprecate polymorphic_allocator::destroy
  • P3142R0 #4611 Printing Blank Lines With println()
• Merged partial C++23 features:
  • P2286R8 Formatting Ranges: +...