How deeply does 100 C++ Mistakes and How to Avoid Them cover run-time polymorphism?

Defines overriding and conceptual dispatch, then stops short of prescribing compiler-specific implementation details.

Run-time polymorphism

As explained in 100 C++ Mistakes and How to Avoid Them

Runtime polymorphism is the selection of an overridden operation according to an object's dynamic type during execution.

Run-time polymorphism lets related classes share an interface while each derived type supplies its own operation. A Shape can expose area while Circle provides the type-specific computation. section 8.9

The mistake is calling virtual functions from constructors or destructors. A Person, Student, and GradStudent hierarchy prints progressively more specific honorifics during construction, producing “Aimee,” “second year Aimee,” and “candidate Aimee” rather than one final dynamic result. Keep construction free of virtual calls; let the fully constructed object use polymorphic behavior afterward. section 8.9

How 100 C++ Mistakes and How to Avoid Them covers it

Cover of 100 C++ Mistakes and How to Avoid Them

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Related concepts

natural language interfaceimplemented by · A natural language interface enables interaction with a system through human-language text or speech.
trait objectimplemented by · A Rust trait object is a value accessed through a trait interface with its concrete implementing type hidden and methods dispatched dynamically.
polymorphismequivalent to · Polymorphism is a programming-language capability that lets a common interface or operation work with values of different types while allowing behavior to vary by type or implementation.

This explainer was generated by Manning's knowledge graph from the text of 100 C++ Mistakes and How to Avoid Them. The section links point to the parts of the book it draws on.