The expressionreinterpret_cast<T>(v)changes the interpretation of the value of the expressionv. It can be used to convert between pointer and integer types, between unrelated pointer types, between pointer-to-member types, and between pointer-to-function types. Usage of thereinterpret_castoperator...
Clang supports indirect call Control-Flow Integrity (CFI) sanitizers (e.g. -fsanitize=cfi-icall), which enforce an exact type match between a function pointer and the target function. Unfortunately, Clang doesn't provide diagnostics that would help developers avoid function type casts that lead...
When casting between pointers (either object or function), if the original value is a null pointer value of its type, the result is the correct null pointer value for the target type. In any case (both when executing an implicit conversion and in the same-type cast), ifexpressionandtype-...
(p1==&i);// pointer to function to another and backvoid(*fp1)()=reinterpret_cast<void(*)()>(f);// fp1(); undefined behaviorint(*fp2)()=reinterpret_cast<int(*)()>(fp1);std::cout<<std::dec<<fp2()<<'\n';// safe// type aliasing through pointerchar*p2=reinterpret_cast<char...
4)null pointer value may be converted to the null pointer value ofnew_type As with all cast expressions, the result is: an lvalue ifnew_typeis an lvalue reference type or an rvalue reference to function type; an xvalue ifnew_typeis an rvalue reference to object type; ...
The type of expression must be a pointer if type-id is a pointer, or an l-value if type-id is a reference.See static_cast for an explanation of the difference between static and dynamic casting conversions, and when it's appropriate to use each....
指针类型(Pointer Types) 指针转换有点复杂,我们将在本文的剩余部分使用下面的类: classCBaseX {public:intx; CBaseX() { x = 10; }voidfoo() { printf("CBaseX::foo() x=%d/n", x); } };classCBaseY {public:inty;int* py; CBaseY() { y = 20; py = &y; }voidbar() { printf("CBa...
指针类型(Pointer Types) 指针转换有点复杂,我们将在本文的剩余部分使用下面的类: classCBaseX{public:intx;CBaseX(){x=10;}voidfoo(){printf("CBaseX::foo() x=%d/n",x);}};classCBaseY{public:inty;int*py;CBaseY(){y=20;py=&y;}voidbar(){printf("CBaseY::bar() y=%d, *py=%d/n",y...
IPreferredRuntimeTypeConcept::QueryInterface 方法 IPreferredRuntimeTypeConcept::Release 方法 IRawEnumerator 接口 IStringDisplayableConcept 接口 KnownCompiler 枚举 LanguageKind 枚举 LocalKind 枚举 位置结构 LocationKind 枚举 ModelObjectKind 枚举 PointerKind 枚举 ...
Type testing with thetypeofoperator Use thetypeofoperator to check if the run-time type of the expression result exactly matches a given type. The following example demonstrates the difference between type checking done with thetypeofoperator and theisoperator: ...