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Showing posts from March, 2012

Rvalue references in constructor: when less is more

I've seen a recurring mistake made by well-versed C++03 programmers when they set out to use rvalue references for the first time. In fact, as it turns out, better you are at C++03, easier it is to fall in the trap of rvalue reference anti-pattern I'm gonna talk about.

Consider the following C++03 class:

class Book { public: Book(const std::string & title, const std::vector<std::string> & authors, const std::string & pub, size_t pub_day const std::string & pub_month, size_t pub_year) : _title(title), _authors(authors), _publisher(pub), _pub_day(pub_day), _pub_month(pub_month), _pub_year(pub_year) {} // .... // .... private: std::string _title; std::vector<std::string> _authors; std::string _publisher; size_t _pub_day; std::string _pub_month; size_t _pub_year; };

The Book class above is as dull as it can be. Now lets C++11'fy it! C++11 g…