问内存不足时的std::throw_with_nested()条件调用std::terminate()EN一、背景介绍： 函数指针始终不太灵活，它只能指向全局或静态函数，对于类成员函数、lambda表达式或其他可调用对象就无能为力了，因此，C++11推出了std::function与std::bind这两件大杀器，他们配合起来能够很好的替代函数指针。
template< class T > [[noreturn]] void throw_with_nested( T&& t ); (C++11 起) 若std::decay<T>::type 是非final 、非 union 、既非 std::nested_exception 亦非从 std::nested_exception 导出的类类型,则抛出一个从 std::nested_exception 和std::decay<T>::type 两者公开导出的未指定类型的...
然后执行throw_with_nested,这个函数是什么意思呢,其实就是把其参数加到nested_exception中,有加入肯定会有取出,与之配套的函数就是rethrow_if_nested,这个一会会看到,然后我们进入open_file,文件未打开设置failbit,流将抛出,进入catch.可以看到其向nested_expection加入了一个runtime_error的异常....
std::throw_with_nested(std::runtime_error("Couldn't open "+s) ); } } // sample function that catches an exception and wraps it in a nested exception voidrun() { try{ open_file("nonexistent.file"); }catch(...) { std::throw_with_nested(std::runtime_error("run() failed") )...
) { std::throw_with_nested( std::runtime_error("Couldn't open " + s) ); } } // 示例函数,捕捉异常并将其包装于 nested_exception void run() { try { open_file("nonexistent.file"); } catch(...) { std::throw_with_nested( std::runtime_error("run() failed") ); } } // ...
std::throw_with_nested std::tie std::time std::timespec std::timespec_get std::time_t std::tm std::to_chars std::tuple std::tuple::swap std::tuple::tuple std::tuple_cat std::tuple_element<std::pair> std::tuple_element<std::tuple> std::tuple_size<std::pair> std::tuple_size...
) { std::throw_with_nested(std::runtime_error("Couldn't open " + s)); } } // sample function that catches an exception and wraps it in a nested exception void run() { try { open_file("nonexistent.file"); } catch (...) { std::throw_with_nested(std::runtime_error("run(...
throw_with_nested<>() (C++11 起)tie<>() (C++11 起)time()time_basetime_get<>time_get_byname<>time_put<>time_put_byname<>time_ttimed_mutex (C++11 起)timespec (C++17 起)timespec_get() (C++17 起)tmtmpfile()tmpnam()to_address<>() (C++20 起)to_array<>() (C++20 起)to_...
std::throw_with_nested std::tie std::time std::timespec std::timespec_get std::time_t std::tm std::to_chars std::tuple std::tuple::swap std::tuple::tuple std::tuple_cat std::tuple_element<std::pair> std::tuple_element<std::tuple> std::tuple_size<std::pair> std::tuple_size...
std::throw_with_nested std::tie std::time std::timespec std::timespec_get std::time_t std::tm std::to_chars std::tuple std::tuple::swap std::tuple::tuple std::tuple_cat std::tuple_element<std::pair> std::tuple_element<std::tuple> std::tuple_size<std::pair> std::tuple_size...