How to upcast an static std::optional...

Return optional from class method...

how does std::optional work under the hood?...

Using std::optional<A> as a class member of class A...

error: no matching function for call to 'std::optional<smoltcp::Buffer>::optional(smoltcp:...

Why std::string append is not overloaded on rval ref?...

Does boost have an "compact optional" where presence is encoded by special value of type?...

In which cases does std::optional operator == cause undefined behavior?...

How do I return an optional pointer or reference ( std::optional )?...

Is it safe to disable warning C4324 for std::optional?...

Is it safe to handle a std::optional in the body of a noexcept function?...

In C++17 can an if statement with an initializer be used to unpack an optional?...

std::optional taking non-copyable?...

Get result into the caller from a function returning std::optional of std::vector...

How is std::optional never "valueless by exception"?...

Compile error while subclassing std::optional...

std::optional: Effective difference between simple and ref-qualified value()...

Disable std::optional's forwarding constructor...

Return std::nullopt as a non-constant reference...

C++: How to initialize and call a method on std::optional?...

How do I use std::optional in C++?...

constexpr std::optional reset...

Use of std::optional to pass a std::vector<int> to a functional by reference...

Does std::optional change signature of the function?...

Does C++ standard allow std::optional<double> to be implemented without overhead...

Why there is no throw or sigsegv while accessing empty std::optional?...

C++17: using std::optional to evaluate if enum contains value...

std optional: No such file or directory...

std::optional implemented as union vs char[]/aligned_storage...

Can a function be applied to the value of a std::optional, getting back an optional?...