Thread: help with using partial_sum method with my own list

The error points to this in the standard libraries (with GCC)

Code:

*__result = __value;

and it means that the result of dereferencing your iterator (*__result) must be something that can be assigned to (used on the left side of the assignment operator).

However, your operator * is defined like this:

Code:

const T operator *() const { return current->value; }

It should return a reference (non-const - for completeness you'd need a separate const_iterator class that returns a const reference):

Code:

T& operator *() const { return current->value; }