Caleth questions

Caleth answers

• ISO C++ says that these are ambiguous, even though the worst conversion for the first is better than the worst conversion for the second
• Does a constructor also have an implicit this parameter
• Do I have to own the "end" pointer for end() when implementing std::vector?
• How to handle conflict between virtual destructor and "Rule of 0"?
• Is it better to pass by value or const ref when parameter is modified?
• Using non-member non-friend functions instead of member functions: disadvantages?
• How to use iterators for 2d arrays in c++?
• Default template parameter with a default value?
• Can I somehow return std::optional with const-reference to my data to avoid copy of it? [duplicate]
• Compare boost intrusive_ptr with different const-ness