Function Objects (Functors)

This lesson introduces function objects, or functors. This concept allows us to create objects that can be used as functions, including state management and parameter handling.

Ryan McCombe
Updated
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Questions & Answers

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Functors vs Lambda Expressions
When should I use a functor instead of a lambda expression in C++?
Non-Operator Overloads in Functors
Can a functor class contain non-operator overloads, and how do I call them?
Templated operator() in Functors
Can the operator() in a functor be a template function?
Functors and Inheritance
Can a derived class override the operator() of a base functor class?
Functor vs Function Performance
Is there a performance difference between using functors and regular functions?
Capturing this in Functors
Can a functor capture the this pointer, and what are the implications?