I want to implement the explicit type conversion between two distance-related classes. I need to overload the ()
as a prefix to use it like:
class1=(class2)class2_object;
Look at user-defined conversion .
Example:
struct Y {};
struct X {
operator Y() const { return ...; }
};
int main() {
X x;
Y y1 = static_cast<Y>(x); // uses conversion operator
Y y2 = (Y)x; // also possible, but don't use C-style casts in C++!
Y y3 = x; // even this is possible...
}
With C++11 you can use the keyword explicit
to avoid accidental implicit casting (ie Y y3 = x;
):
explicit operator Y() const { return ...; }
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.