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static_casting from Parent to Child??
- From: "ArbolOne" <ArbolOne at hotmail dot ca>
- To: "g++ help" <gcc-help at gcc dot gnu dot org>, "MinGW" <mingw-users at lists dot sourceforge dot net>
- Date: Mon, 1 Jun 2015 13:25:52 -0400
- Subject: static_casting from Parent to Child??
- Authentication-results: sourceware.org; auth=none
In the bellow sample I get an error saying : cannot convert from
'std::shared_ptr<Parent>' to 'Child'
class Parent : public std::exception{
private:
//....
public:
void Display(){std::cout << what() << std::endl;}
};
class Child : public Parent{
void Display(){MessageBox(0,TEXT("good",TEXT("Menu"),MB_OK |
MB_ICONERROR);}
};
class m_class1{
private:
std::shared_ptr<Parent> ex;
public:
m_class1(){ ex.reset(new Parent); }
void foo(){
//...
throw ex;
}
};
void main(){
auto ex = std::shared_ptr<Child>();
try{
auto mc = std::shared_ptr<m_class1>();
mc->foo();
/// bla bla
}catch(std::shared_ptr<Parent>& e){
ex = static_cast<Child>(e); // Error
//...
}
}
What can I do to remove this error