Vasilij questions

Vasilij answers

• Array size template deduction
• Can the class member can be changed depending on the template args in c++
• How can I implement a function take as some optional parameters in C++?
• QPlainTextEdit display slow performace
• Unexpected result of std::is_invocable over a template type
• In C++ when should we use std::any, std::variant or std::optional? [closed]