Top Answers

1. Why can a T* be passed in register, but a unique_ptr<T> cannot?
   61 votes
2. Include of iostream leads to different binary
   33 votes
3. What is the difference between #include <filename> and #include "filename"?
   18 votes
4. What exactly is va_end for? Is it always necessary to call it?
   15 votes
5. Why is the construction of std::optional<int> more expensive than a std::pair<int, bool>?
   15 votes