IMPLEMENT_DYNAMIC是实现“运行时类型识别”宏,与之相对应的是DECLARE_DYNAMIC(声明“运行时类型识别”宏)。也就是说你在.CPP文件中如果看见有IMPLEMENT_DYNAMIC,则在.H文件中必定有DECLARE_DYNAMIC的声明。 DECLARE_DYNAMIC/DEClARE_DYNAMIC是为了确定运行时对象属于哪一个类而定义的宏。 DEC
IMPLEMENT_DYNAMIC这个宏的作用是使得MFC框架能够在运行时创建你定义的MFC类的对象（因为你的MFC类不属于MFC框架，而MFC框架需要在运行时创建它们，如那些基于CDocument、CView等的派生类），而CRect属于MFC框架本身，可以直接创建实例。CkeyEdit是CEdit的子类，应该注意到；是否继承了CEdit累在类的定义里有没...
Generates the C++ code necessary for a dynamicCObject-derived class with run-time access to the class name and position within the hierarchy. Syntax IMPLEMENT_DYNAMIC( class_name , base_class_name ) Parameters class_name The actual name of the class. ...
#define IMPLEMENT_DYNAMIC(class_name, base_class_name) \ _IMPLEMENT_RUNTIMECLASS(class_name, base_class_name, 0XFFFF, NULL) class CObject { public: CObject() {} ~CObject() {} virtual CRuntimeClass* GetRuntimeClass() const; static CRuntimeClass classCObject; }; class CCmdTarget : pu...
1.2.1 DECLARE_DYNAMIC 说明: 1.声明CRuntimeClass的静态变量,变量名为 class+类名 2静态成员函数CRuntimeClass* GetRuntimeClass()const 来获取当前类CRuntimeClass静态成员的指针。 class CCmdTarget : public CObject { DECLARE_DYNAMIC(CCmdTarget)
C/Java/C#这些语言的转型比较必要且难以避免,也不太危险,但C++不同。 转型语法通常有三种不同的形式,如下 // C风格的转型操作 (T) expression // 将expression转型为T // 函数风格的转型操作 T(expression) // 以下为新式转型 const_cast<T>(expression) dynamic_cast<T> (expression) reinterpret_cast<T>...
classCMyDynCreateObj:publicCObject {intm_Num;public: DECLARE_DYNCREATE(CMyDynCreateObj) CMyDynCreateObj(intNum) { m_Num = Num; }private: CMyDynCreateObj() { m_Num =0; }// provide default constructor only for// dynamic creation};
#define RUNTIME_CLASS(class_name) ((CRuntimeClass*)&class_name::class##class_name) // no支持动态创建的宏 #define DECLARE_DYNAMIC(class_name) \ public: \ static const CRuntimeClass class##class_name; \ virtual CRuntimeClass* GetRuntimeClass() const; ...
China's COVID-19 response should put the people and their lives above everything else, practice the general strategy of "preventing both imported cases and domestic resurgences," and tenaciously pursue the policy of "dynamic zero-COVID," he said. ...
15 + #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS 16 + /* 17 + * Due to -fpatchable-function-entry=2, the compiler has placed two NOPs before 18 + * the regular function prologue. For an enabled callsite, ftrace_init_nop() and 19 + * ftrace_make_call() have patched those NOPs...