Caleth questions

Caleth answers

• Why the standard defines borrowed_subrange_t as common_range?
• How do you use std::views::zip (and friends) with the pipe syntax?
• Cleaner way to specify type to get from a std::variant?
• How can I convert std::vector<T> to a vector of pairs std::vector<std::pair<T,T>> using an STL algorithm?
• Why std::erase and std::erase_if don't support projection?
• Why constexpr method can return correctly class members whose value change during execution?
• What is the cleanest way to do a `std::partial_sum` with a `0` in front?
• Why does std::predicate require *implicit* conversion to bool?
• What's the point of deleted virtual functions?
• What will happen if dynamic_cast<void*> casts an object with underlying non-most-derived class?