使用shared_ptr<void>代替void*可以解决声明周期管理的问题。shared_ptr有足够的类型信息以了解如何正确销毁它指向的对象。 structday{ // ...things... std::shared_ptr<void> user_data; }; structmonth{ std::vector<day> days; std::shared_ptr<void> user_dat
Member microcai commented Oct 14, 2024 一个不注意,没发现 local_ 的类型不是 std::any . 修正 concept 检查。microcai requested a review from Jackarain October 14, 2024 15:25 promsietype 的 local_ 类型是 std::shared_ptr<std::any>, 修正之 313f4bd microcai force-pushed the fix_is_awa...
llvm::cl::opt不可复制。 复制构造器和复制赋值运算符都标记为delete。 std::any要求在构造和分配中该类型是可复制的。 您可以使用std::unique_ptr>或std::shared_ptr>,甚至可以使用std::reference_wrapper,这取决于您希望如何处理对象的生存期。 ~阅读全文~人机检测~...
std::shared_ptr<void> user_data; }; sinceshared_ptrsquirrels away enough type info to know how to properly destroy the object it points at. A client could create ashared_ptr<Foo>, and the deleter would continue to work just fine after converting toshared_ptr<void>for storage in the cal...
std::unique_ptr不能用作std::any,因为后者要求值类型是可复制构造的,而std::unique_ptr不是。根据您描述的使用情形:直接的解决方案是使用std::shared_ptr,它是可复制构造的。然而,在这种情况下,std::any就不是必需的了。所有的std::shared_ptr示例总是可以转换成std::shared_ptr<void>。删除器是类型擦除...
std::shared_ptr<void> user_data; }; struct month { std::vector<day> days; std::shared_ptr<void> user_data; }; sinceshared_ptrsquirrels away enough type info to know how to properly destroy the object it points at. A client could create ashared_ptr<Foo>, and the deleter would cont...
std::future<T> add_waiter( std::future<T> f, std::size_t i, std::shared_ptr<many_waiter_t> waiter ) { return std::async([f = std::move(f), waiter, i]{ auto r = f.get(); waiter.set(i); return r; }); } 消费一系列未来 fs,我们可以生成新的未来 f2s 还有一个服务员,...
It contains a small object optimization for objects with a size of up to 2 words (such asint,floatandstd::shared_ptr). Storing those objects in the container will not trigger a dynamic allocation. For a easy to understand documentation, seecppreference, except our namespace islinb. ...
std::shared_ptr::operator-> std::shared_ptr::operator<< std::shared_ptr::operators std::shared_ptr::operators (>=) std::shared_ptr::operator[] std::shared_ptr::owner_before std::shared_ptr::reset std::shared_ptr::shared_ptr std::shared_ptr::swap std::shared_ptr::unique std::sh...
问将std::list<boost::any>作为参数传递给函数ENstd::any 是 c++17 标准新提供的类，作用是存储任意...