// tag
2 posts tagged #print.
C++26 rewrote std::print's internals and backported the fix
std::print's per-call atomicity extends to your own types via std::formatter. How it stays both safe and efficient is a C++26 story: P3107 adds locking-aware entry points and a formatter opt-in to avoid deadlock, and ships as a backport into C++23. Episode 5 of the concurrent I/O series.
std::print does not tear the way std::cout does
The fixes so far needed cooperation or a lock. C++23's std::print gives per-call atomicity for free: a single print call never interleaves with another, the way printf never did and std::cout always could. But the guarantee is per-call, so a line split across two calls can still tear. Episode 4 of the concurrent I/O series.