Contains core_export_ keyword.
std::nullopt_t null_opt
Represents the null_opt alias on std::nullopt_t.
Definition null_opt.hpp:19
constexpr null_opt nullopt
Represents a nullopt value. Used to indicate that an std::optional does not contain a value.
Definition nullopt.hpp:26
The xtd namespace contains all fundamental classes to access Hardware, Os, System,...
Definition xtd_about_box.hpp:10
Contains xtd::null_opt alias.