Issues

• Release notes and versioned documentation, once xstd-ints has releases

  future extension
  rhalbersma/xstd-ints#355 · Filter by author rhalbersma opened on Oct 20, 2026

• Give each header page a compiled example

  enhancement
  rhalbersma/xstd-ints#354 · Filter by author rhalbersma opened on Oct 20, 2026

• Run the libc++, libstdc++ and MSVC STL test suites against the functions and traits that widen a standard one

  enhancement
  rhalbersma/xstd-ints#349 · Filter by author rhalbersma opened on Oct 20, 2026
  3

• Fail early, fail fast: run CI's Linux legs locally before a push, and move the scripts to cpp-ci

  enhancement
  rhalbersma/xstd-ints#330 · Filter by author rhalbersma opened on Oct 17, 2026
  1

• Depth, Speed, Altitude, Range: which issues answer each, what is processed, and what it found

  enhancement
  rhalbersma/xstd-ints#327 · Filter by author rhalbersma opened on Oct 17, 2026
  1

• Report upstream that Boost.Int128's <bit> functions take a signed argument through its conversion to uint128

  upstream report
  rhalbersma/xstd-ints#326 · Filter by author rhalbersma opened on Oct 17, 2026

• Ship xstd-ints through vcpkg and Conan, and consume it from a clean project

  enhancement
  rhalbersma/xstd-ints#320 · Filter by author rhalbersma opened on Oct 16, 2026

• Test whether the branch-free bit kernels run in time independent of their data

  enhancement
  rhalbersma/xstd-ints#316 · Filter by author rhalbersma opened on Oct 16, 2026
  1

• Offer P3104's bit permutations to libstdc++ and libc++, built on the proved kernels

  upstream report
  rhalbersma/xstd-ints#313 · Filter by author rhalbersma opened on Oct 16, 2026
  4

• Report GCC's missed unrolling and inlining in the 128-bit bit_reverse upstream

  upstream report
  rhalbersma/xstd-ints#312 · Filter by author rhalbersma opened on Oct 16, 2026
  2

• Altitude: carry what xstd-ints proves into the standard, the standard libraries and the compilers

  enhancement
  rhalbersma/xstd-ints#311 · Filter by author rhalbersma opened on Oct 16, 2026
  2

• Draft LWG issues for each place the implementation knowingly departs from the wording

  upstream report
  rhalbersma/xstd-ints#307 · Filter by author rhalbersma opened on Oct 16, 2026
  6

• Back every correctness and performance claim with evidence from outside the repository

  enhancement
  rhalbersma/xstd-ints#301 · Filter by author rhalbersma opened on Oct 16, 2026
  2

• Scope: C++26 saturation arithmetic and C23 checked arithmetic, widened to 128-bit and _BitInt as &lt;bit&gt; is

  future extension
  rhalbersma/xstd-ints#298 · Filter by author rhalbersma opened on Oct 14, 2026

• A WG21 paper: bit_select and rank, as a follow-up to P3104

  future extension
  rhalbersma/xstd-ints#296 · Filter by author rhalbersma opened on Oct 14, 2026
  1

• Upstream report (MSVC x86 codegen): inlined callees write through over-aligned by-value parameters; bindings passed by value

  upstream report
  rhalbersma/xstd-ints#294 · Filter by author rhalbersma opened on Oct 14, 2026

• bit_compress / bit_expand: XSTD_INTS_BIT_PERMUTATION choice, popcount-adaptive portable kernels, SVE2 BITPERM

  future extension
  rhalbersma/xstd-ints#282 · Filter by author rhalbersma opened on Oct 12, 2026
  1

• Explore a modules build alongside the headers, the way fmt does it

  future extension
  rhalbersma/xstd-ints#250 · Filter by author rhalbersma opened on Sep 16, 2026
  1