The national bodies didn't approve the C++26 draft in its DIS ballot, and the No votes point to contracts. The numbers, why every vote in a national committee counts, what the committee can do next, and what it means for code written against C++26 today.
C++26 failed its DIS ballot, marking the first time a C++ draft has been rejected. This outcome leaves features like contracts, reflection, and std::execution unapproved, with the timeline for resolution currently unknown.
C++26 is the first C++ draft to fail a DIS ballot, a first for SC22 language standards.
The rejection leaves contracts, reflection, and library hardening features in an unapproved state.
The author supports contracts for runtime checking and self-documenting API intent.
Summarised automatically by AI from the original article by Hacker News. AI can make mistakes, so check the original for details.
This is Part 6 of the C++26 contracts series on what C++26 contracts do, and the argument over shipping them. It follows on from Were C++26 contracts tried enough, and how were the objections handled?.
C++26 failed its DIS ballot. As far as I know, it is the first C++ draft to fail one. Robert Seacord, the convenor of the C committee, wrote that he doesn’t think any language standard from SC22 has ever failed its ballot before, and Daveed Vandevoorde, a member of the WG21 Direction Group (P5000R1), wrote that no earlier C++ draft got even a single vote against. So reflection, std::execution, library hardening, and contracts are all in a draft that ISO hasn’t approved, and nobody knows yet how long the delay will be.
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