更新时间:2022-06-23 23:11:19
dynamic_cast
只适用于多态类型,即包含虚函数的类。
dynamic_cast
works only on polymorphic types, i.e. classes containing virtual functions.
在gcc中,您可以 dynamic_cast
到: void *
但不是来自:
In gcc you can dynamic_cast
to void*
but not from:
struct S
{
virtual ~S() {}
};
int main()
{
S* p = new S();
void* v = dynamic_cast<void*>(p);
S* p1 = dynamic_cast<S*>(v); // gives an error
}
成功解决from scipy.linalg import _fblas ImportError: DLL load failed: 找不到指定的模块。
Data source rejected establishment of connection, message from server: "Too many connections"
Type mismatch: cannot convert from Enumeration<String> to Enumeration<Object>
Type mismatch: cannot convert from Enumeration to Enumeration