17 Language support library [support]
namespace std {
class exception;
class bad_exception;
class nested_exception;
using terminate_handler = void (*)();
terminate_handler get_terminate() noexcept;
terminate_handler set_terminate(terminate_handler f) noexcept;
[[noreturn]] void terminate() noexcept;
constexpr int uncaught_exceptions() noexcept;
using exception_ptr = unspecified;
constexpr exception_ptr current_exception() noexcept;
[[noreturn]] constexpr void rethrow_exception(exception_ptr p);
template<class E> constexpr exception_ptr make_exception_ptr(E e) noexcept;
template<class T> [[noreturn]] constexpr void throw_with_nested(T&& t);
template<class E> constexpr void rethrow_if_nested(const E& e);
}