我最初认为这可能与unique_ptr只移动或std::set有const个键有关,但后来不清楚为什么其他块可以工作。 你一针见血。很难从错误中分辨出来,我也无法产生一些明显的错误消息,但简而言之,问题是std::set只允许我们访问const键,而std::unique_ptr需要一些non-const才能移动。 通过as_rvalue管道传输这个范围并不能解决...
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...
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...
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...
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 '