How to declare a vector of unique_ptr's as class data member?

Question

I\'d like to have a vector of unique_ptr\'s as a member of a class I\'m making.

class Foo {
    [...]

private:
    vector> barList;
         


        

Answer 1

The problem here is that somewhere, your code is attempting to call the "copy-assignment" operator of Foo.

This causes the compiler to attempt to generate a copy-assignment operator which calls the copy-assignment operators of all the subobjects of Foo. Eventually, this leads to an attempt to copy a unique_ptr, an operation which is not possible.