It looks like in zig all functions are `constexpr` ?
As for `constinit`, it looks like ziglang doesn't have an answer for the problem that constinit solves. That is, ziglang appears to have the same bugs here that C++ did before constinit was added.
Can you give an example of a bug in a Zig program caused by the lack of constinit? It seems like Zig just does not have the delayed initialization of static and thread-local variables that C++ has, but I'm not completely sure of this.
zig has lazily initialized at runtime mutable globals, and compile-time initialized constant globals (so C++'s constexpr variables). But what it doesn't have is compile-time initialized mutable globals (which is what `constinit` does)
