namespace std { class exception { public: exception() noexcept; exception(const exception&) noexcept; exception& operator=(const exception&) noexcept; virtual ~exception(); virtual const char* what() const noexcept; }; }
exception() noexcept;
exception(const exception& rhs) noexcept;
exception& operator=(const exception& rhs) noexcept;
virtual ~exception();
virtual const char* what() const noexcept;