所以从这个角度来想,上边例子使用reinterpret_cast从const int * 到FunctionPointer转换就变得合理了,因为它并没有去除const限定
一、C 风格(C-style)强制转型如下: (T) expression // cast expression to be of type T 函数风格(Function-style)强制转型使用这样的语法: T(expression) // cast expression to be of type T 这两种形式之间没有本质上的不同,它纯粹就是一个把括号放在哪的问题。我把这两种形式称为旧风格(old-style)...
This check determines whether: An array is mapped to a larger array through a pointer cast A function pointer points to a function with a valid prototype A global variable falls outside the range specified through the Global Assert mode.
这是因为static_cast计算了父子类指针转换的偏移量,并将之转换到正确的地址(c里面有m_a,m_b,转换为B*指针后指到m_b处),而reinterpret_cast却不会做这一层转换。 reinterpret_cast VS const_cast reinterpret_cast不能像const_cast那样去除const修饰符。 intmain() { typedefvoid(*FunctionPointer)(int);intv...
->i = v; // OK as long as the type object isn't const } }; int main(){ [[maybe_unused]] void (type::*pmf)(int) const = &type::f; // pointer to member function // const_cast<void(type::*)(int)>(pmf); // compile error: const_cast does // not work on function ...
I'm still think about some safe conversion of that pointers and wrote little code that make some conversions using void pointer and return void from function. then is static_cast conversion to needed format. I was think about that void, because it can handle anything, if you don't kn...
A pointer to a data object or to a function (but not a pointer to member) can be converted to any integer type large enough to contain it. (Typelongis always large enough to contain a pointer value on the architectures supported by the C++ compiler.) When converted back to the original...
A pointer to a data object or to a function (but not a pointer to member) can be converted to any integer type large enough to contain it. (Typelongis always large enough to contain a pointer value on the architectures supported by the C++ compiler.) When converted back to the original...
显示：warning: implicit declaration of function 'Example()'。警告原因：在你的.c文件中调用了函数Example()，可是你并没有把声明这个函数的相应的.h文件包含进来，有可能你在一个.c文件中定义了这个函数体，但并没有在.h中进行声明。解决方法：你可以在调用这种函数的.c文件的一开始处加上：...
一、C风格(C-style)强制转型如下: (T)expression//castexpressiontobeoftypeT 函数风格(Function-style)强制转型使用这样的语法: T(expression)//castexpressiontobeoftypeT 这两种形式之间没有本质上的不同,它纯粹就是一个把括号放在哪的问题。我把这两种形式称为旧风格(old-style)的强制转型。