May 2017
Intermediate to advanced
590 pages
17h 18m
English
Content preview from Modern C++ Programming Cookbook
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Separating interfaces and implementations with the non-virtual interface idiom
Virtual functions provide customization points for a class, by allowing derived classes to modify implementations from a base class. When a derived class object is handled through a pointer or a reference to a base class, calls to overridden virtual functions end up invoking the overridden implementation from the derived class. On the over hand, a customization is an implementation detail, and a good design separates interfaces from implementation. The non-virtual interface idiom, proposed by Herb Sutter in an article about virtuality in C/C++ Users Journal, promotes the separation of concerns of interfaces and implementations by making (public) interfaces non-virtual ...
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