Darien Miller:

So i tried re-implementing my own string class using smart pointers just so I can practice integrating them into my daily use. Sadly, I've hit a wall, and I can't figure out why I'm unable to concatenate two "mystring" objects. Any suggestions? Also, if this type of program isn't the proper situation to use smart pointers in, I would also appreciate advice related to that as well.

#include 
#include 
#include 

using namespace std;

class mystring {
public:
    mystring() : word(make_unique('\0')), len(0) {}
    ~mystring() { cout     mystring(const char *message) : word(make_unique(strlen(message) + 1)), len(strlen(message)) {
        for (int i = 0; i     }
    mystring(const mystring &rhs) : word(make_unique(rhs.len)), len(rhs.len + 1) {
        for (int i = 0; i     }
    mystring &operator=(mystring &rhs) {
        if (this != &rhs) {
            char *temp = word.release();
            delete[] temp;
            word = make_unique(rhs.len + 1);
            len = rhs.len;
            for (int i = 0; i         }
        return *this;
    }
    mystring &operator=(const char *rhs) {
        char *temp = word.release();
        delete[] temp;
        word = make_unique(strlen(rhs)+ 1);
        len = strlen(rhs);
        for (int i = 0; i 
        return *this;
    }
    friend mystring operator+(const mystring& lhs, const mystring& rhs) {
        mystring Result;
        int lhsLength = lhs.len, rhsLength = rhs.len;

        Result.word = make_unique(lhsLength + rhsLength + 1);
        Result.len = lhsLength + rhsLength;
        for (int i = 0; i         for (int i = lhsLength; i 
        return Result;
    }
    friend ostream &operator        for (int i = 0; i         return os;
    }
private:
    int len;
    unique_ptr word;
};

int main()
{
    mystring word1 = "Darien", word2 = "Miller", word3;

    cout     word3 = word1 + word2;//error message: no binary '=' found
    cout     return 0;
}