[Solved] Why this c++ code doesn’t compile? [closed]

Question

std::list<Tree<T>&>* children;

Standard containers can’t store reference types. From the rest of the code, it looks like this should store Tree<T> objects. (If you wanted to refer to objects that live somewhere else, you’d have to store pointers rather than references; but this doesn’t seem to be the case here).

You also have a duplicate default argument on both the declaration and definition of printTree, and a missing typename where you declare std::list<Tree<T>>::iterator i in printTree; it’s possible that your compiler will accept these errors though.

Accepted Answer

std::list<Tree<T>&>* children;

Standard containers can’t store reference types. From the rest of the code, it looks like this should store Tree<T> objects. (If you wanted to refer to objects that live somewhere else, you’d have to store pointers rather than references; but this doesn’t seem to be the case here).

You also have a duplicate default argument on both the declaration and definition of printTree, and a missing typename where you declare std::list<Tree<T>>::iterator i in printTree; it’s possible that your compiler will accept these errors though.