First Class Functions

Learn about first-class functions in C++: a feature that lets you store functions in variables, pass them to other functions, and return them, opening up new design possibilities

Ryan McCombe
Updated
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Questions & Answers

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Returning Function Pointers from Functions
How can I return a function pointer from a function in C++? What are some use cases for doing this?
Capturing Local Variables in C++ Lambdas
How can I capture local variables from the enclosing scope when using lambdas in C++? What are the different capture modes and when should I use each?
Downcasting Function Pointers in C++
Is it possible to downcast a function pointer to a more specific function pointer type in C++? For example, casting a pointer-to-base to a pointer-to-derived. If so, how is it done and what are the risks?
Function Pointers and Virtual Functions
How do function pointers interact with virtual functions in C++? Can I take a pointer to a virtual function?
Understanding Complex Function Pointer Syntax
C++ function pointer syntax can get quite complex, especially with things like typedef and using directives. How can I decipher complex function pointer syntax?
Function Pointers and Static Member Functions
Can I take a function pointer to a static member function in C++? How is it different from taking a pointer to a non-static member function?