http://duoduokou.com/cplusplus/17652751521747840881.html WebDec 28, 2024 · dynamic_pointer_cast. template

七十八、static_cast和dynamic_cast,static_poonter_cast …

WebMay 26, 2024 · dynamic_pointer_cast与dynamic_cast用法类似，当指针是智能指针时候，向下转换，用dynamic_Cast 则编译不能通过，此时需要使用dynamic_pointer_cast。 智能指针的用法可以参考上一篇博客。 WebFeb 17, 2024 · 订阅专栏. 一、static_cast和dynamic_cast区别：. 1、static_cast：向上转 … raymond larry taylor bessemer al

C++------static_cast和dynamic_cast详解 - CodeAntenna

WebIf dynamic_cast is used to convert to a reference type and the conversion is not possible, an exception of type bad_cast is thrown instead. dynamic_cast can also perform the other implicit casts allowed on pointers: casting null pointers between pointers types (even between unrelated classes), and casting any pointer of any type to a void ... Web可以用 dynamic_cast 执行安全的向下转型。 struct B { }; struct D : B { }; D d; B & br = d; static_cast< D &>( br); // 左值指代原初的 d 对象 3) 若 新类型 是右值引用类型，则 static_cast 将 泛左值、类纯右值或数组纯右值 (C++17 前)任何左值 (C++17 起) 表达式 的值转换为与该表达式指代相同对象，或指代其基类子对象（取决于 新类型 ）的 亡值 。 若 … WebDynamic Casts A pointer (or reference) to a class can actually point (refer) to any class derived from that class. Occasionally, it may be desirable to obtain a pointer to the fully derived class, or to some other subobject of the complete object. The dynamic cast provides this facility. raymond larry