CODEWITHSUNDEEP
c++constructoroverloading
Conor Egan
Conor Egan

Reputation: 469

Using overloaded >> operator inside class constructor to initialise it

I have overloaded the >> operator, making an object from a stream. I was wondering if I can use this in a contructor that takes in the same format as the stream but as a string. Could I use the >> operator in the constructor, or will I have to make code to split that line up differently?

For example:

Person::Person(std::string line)
{
    // this doesn't work
    this >> line;
}

std::istream &operator>>(std::istream &is, Person &p)
{
    char c1;

    std::string forename, surname;

    if (is >> forename >> c1 >> surname)
    {
        if (c1 == ',')
        {
            p.forename = forename;
            p.surname = surname;
        }
        else
        {
            is.clear(std::ios_base::failbit);
        }
    }

    return is;
}

An example input would be: Foo,Bar

Upvotes: 1

Views: 68

Answers (1)

3CxEZiVlQ
3CxEZiVlQ

Reputation: 38498

#include <sstream>
Person::Person(std::string line)
{
    std::stringstream ss(line);
    ss >> *this;
}

Upvotes: 4

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