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Post #24830 16
Accessing inactive union members through char: the aliasing rule you didn’t know about
https://www.sandordargo.com/blog/2026/03/04/char-representation-and-UB

https://redd.it/1rn09z0
@r_cpp
Sandor Dargo’s Blog Accessing inactive union members through char: the aliasing rule you didn’t know about I recently published an article on a new C++26 standard library facility, std::is_within_lifetime. As one of my readers, Andrey, pointed out, one of the examples contains code that seems like undefined behavior. But it’s also taken — almost directly — from…
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