+ //! \returns a pointer to the `Ex` held by `*this`, if it holds an object
+ //! whose type `From` permits `std::is_convertible<From*, Ex*>`;
+ //! otherwise, returns `nullptr`.
+ //! \note This function does not mutate the `exception_wrapper` object.
+ //! \note This function may cause an exception to be thrown and immediately
+ //! caught internally, affecting runtime performance.
+ template <typename Ex>
+ Ex* get_exception() noexcept;
+ //! \overload
+ template <typename Ex>
+ Ex const* get_exception() const noexcept;
+