Tag Archives: stating intentions

Concepts without Concepts

“Concept” can mean two things in the context of C++ generic libraries: Something informal: something we know about template parameters, and can tell to other human programmers, e.g. in documentation. A language feature. This post is about concepts in the … Continue reading

Posted in programming | Tagged , , , , | 10 Comments

Another polymorphism

In this post we will try to see by a practical example what Boost.Variant is for. You can sometimes see examples that use type variant<int, double, string>, but to me they are artificial: I never needed to use something that … Continue reading

Posted in programming | Tagged , , , , , | 20 Comments

More than you need

The classes you design can do more (in terms of allowed operations) than what you could figure out from just looking at their member function declarations. The C++ Standard defines a number of cases where certain expressions involving your type … Continue reading

Posted in programming | Tagged , , , , , | 14 Comments

Declaring the move constructor

Update. I have updated the post a bit, as it misled a number of people to think that you need to define the move constructor in a cpp file. This is not so. I have now also highlighted another important … Continue reading

Posted in programming | Tagged , , , | 11 Comments