Do I need `std::launder` when working with unions?...

Why is it undefined behavior to std::launder a multidimensional array?...

C++ Undefined behaviour when reinterpret cast is used...

C++ Undefined behaviour in vector access...

Constructing class or structures in an improper way using std::launder...

Is std::launder needed after std::uninitialized_default_construct...

Can std::launder be used to convert an object pointer to its enclosing array pointer?...

Using std::launder to "validate" non "pointer to object" pointer value since C++...

Where can I find what std::launder really does?...

std::launder do not work on gcc with -O3 option?...

What is the purpose of std::launder?...

Why introduce `std::launder` rather than have the compiler take care of it?...

Does placement new start object's lifetime?...

reachability with std::launder...

How to interpret the precondition of std::launder?...

Does the effect of std::launder last after the expression in which it is called?...

Can I overwrite a const object via placement-new?...

placement new on a class with reference field...

std::launder with inplace polymorphic containers...

How to get float bit representation without UB in C++?...

std::launder alternative pre c++17...