1、内存管理与指针 问题:解释 C++ 中的智能指针(如 std::unique_ptr 和 std::shared_ptr)的原理,及其使用场景。如何避免循环引用?...原子操作和 std::atomic 的使用,特别是在高性能并发环境下的适用性。 深入问题:你如何在一个高并发环境中设计一个无锁队列?该设计中存在哪些挑战?...3、虚函数与...
std::shared_ptr::owner_before std::shared_ptr::reset std::shared_ptr::shared_ptr std::shared_ptr::swap std::shared_ptr::unique std::shared_ptr::use_count std::signal std::sig_atomic_t std::size_t std::static_pointer_cast std::strftime std::swap(std::any) std::swap(std::funct...
std::unique_ptr m_widget; }; Gadget mainGadget; // File 2 - global variable, suppose this constructs second std::set<Widget*> s_allWidgets; At program startup, we construct themainGadget. TheGadgetconstructor doesn’t need aWidgetright away, so there’s no static initialization order fias...
how to cast a unique_ptr from base class to derived class? How to cast from LPSTR to int/double (best way) How to catch Access violation exception How to change "Caption" of Dialog in run-time How to change a Button Caption When it is clicked? VC++(MFC) How to change background ...
error: 'class std::unique_ptr<std::set<long unsigned int> >' has no member named 'size' 下面是我尝试使用 cout 打印的代码片段。auto current_list = std::make_unique<std::set<uint64_t>>(); std::cout << "Number of elements in current_list is : " << current_list.size(); ...
how to cast a unique_ptr from base class to derived class? How to cast from LPSTR to int/double (best way) How to catch Access violation exception How to change "Caption" of Dialog in run-time How to change a Button Caption When it is clicked? VC++(MFC) How to change background...
std::hash <std::unique_ptr> std::hash <std::variant> std::hash(std::shared_ptr) std::hash::hash std::hash<std::error_code> std::hash<std::error_condition> std::hash<std::type_index> std::has_unique_object_representations std::has_virtual_destructor std::holds_alternative std::ig...
问在定义std::set时出现奇怪的编译错误，在C++17和20中使用自定义比较，完全按照14中的预期工作EN/usr/include/c++/10/bits/stl_tree.h:782:8:error:staticassertion failed:comparison object must be invocableasconst '
尝试将std::pair插入std::set时,需要确保std::pair的元素类型满足std::set的排序要求。std::set是一个有序集合容器,它根据元素的键值自动进行排序,并且不允许重复的元素。 std::pair是一个模板类,用于存储一对值,可以将其视为一个简单的结构体。std::pair的默认排序规则是按照第一个元素进行排序,如果第一...