Strong types for strong interfaces - Jonathan Boccara - Meeting C++ 2017
Strong types are such a powerful tool for bringing expressiveness into code. By using them we can precisely state our intentions about our C++ objects, both to compilers and to human beings reading our code.
This topic has been popular for years in the C++ community, notably with an implementation in Boost (strong typedef), and proposals for standards. Actually, std::chrono already intensively uses strong typing.
In this talk, you will see what strong types are, how they can make your code clearer, and whether or not you will incur a performance cost in your code by using them. We will see various usages of strong types, including units and named parameters. This will be based on a simple implementation of generic strong typing that I am proposing and that was already presented to many people.
But I want to take this topic further, by also showing practical aspects of strong types that do come up in real code, which includes:
Passing strong types by reference,
Strong typing over generic types, or otherwise unknown types like lambdas,
Inheriting functionalities from the underlying type,
Converting strong types to one another.
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