John Z. Li questions

• Does the effect of std::launder last after the expression in which it is called?
• How to automatically set stream mode back to default [duplicate]
• Why the constructor of std::mutex in C++ does not throw?
• How do bit fields interplay with bits padding in C++
• perl6 placeholder variable and topic variable
• Why is std::ssize() introduced in C++20?

John Z. Li answers