#coroutines
3 posts tagged #coroutines.
GCC trunk accepts a coroutine promise with return_value and return_void
GCC 16.2 rejects a coroutine promise type that declares both return_value and return_void. GCC trunk accepted it from 3 October 2026, implementing P3950R1 as a defect report, and now reports __cpp_impl_coroutine as 202606L. The same program on Compiler Explorer shows both results.
Gor Nishanov (1971-2026), who gave C++ its coroutines
Gor Nishanov, the architect of C++20 coroutines, has died at 54. From the 2014 resumable-functions papers to shipping implementations in MSVC and Clang, he spent the better part of a decade turning co_await into a standard language feature. Herb Sutter remembered him as intelligent and witty, but above all kind.
The May 2026 WG21 mailing in five papers (pre-Brno, 116 total)
WG21 dropped the pre-Brno mailing in early May -- 116 papers, the largest pre-meeting mailing since the C++20 design crunch. Five papers are doing the heavy lifting for C++29's safety story (the headline axis named in P5000R1 'Direction for ISO C++29'), plus the coroutines-for-I/O work that finally got first LEWG review on the schedule. This is the table of contents for what wro.cpp will be tracking through to Brno (8-13 June).