I guess I'll throw in my (unverified) observation. vector<int*> and vector<int const*> are two unrelated types, regardless of the relationship of the types they contain, and as such the cast is UB.
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I guess, all that being said, I gave it a shot in godbolt with -fsanitize=undefined and it didn't return any errors. *shrug*. If it were me, I'd use a span<int const *>.
At risk of inciting a mob, those who follow @lefticus may be best equipped to answer this.
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Yes, they are two completely unrelated types, and it is UB. Breaks strong aliasing rules. Most uses of const_cast enable UB and almost all uses of reinterpret_cast result in UB, and your c-style cast is a reinterpret_cast. I'll let
@shafikyaghmour link his articles -
So what's the most performant way to get a const version of those pointers in an array format? Std::span? And before c++20?
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