Chapter 19
Implementing Traits
Templates enable us to parameterize classes and functions for various types. It could be tempting to introduce as many template parameters as possible to enable the customization of every aspect of a type or algorithm. In this way, our “templatized” components could be instantiated to meet the exact needs of client code. However, from a practical point of view, it is rarely desirable to introduce dozens of template parameters for maximal parameterization. Having to specify all the corresponding arguments in the client code is overly tedious, and each additional template parameter complicates the contract between the component and its client.
Fortunately, it turns out that most of the extra parameters we would introduce ...
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