Complete Modern C++ - Callbacks Revisited - Function Pointers

The video revisits function pointers and introduces a sorting algorithm using function templates. It discusses the limitations of sorting in ascending order and handling C-style strings. The video then explains how to generalize comparisons using function pointers and predicates, allowing flexible sorting. It highlights the limitations of function pointers, such as lack of optimization and state management, and suggests using function objects as an alternative.

What is a limitation of the initial sorting algorithm discussed in the video?

• It cannot handle arrays of integers.

• It can only sort in descending order.

• It requires user input for sorting.

• It always sorts in ascending order.

How can sorting be customized using function pointers?

• By using a different sorting algorithm.

• By changing the array size.

• By modifying the array elements.

• By implementing a custom comparison function.

What is a predicate in the context of sorting algorithms?

• A function that sorts arrays in descending order.

• A function that modifies array elements.

• A function that returns a Boolean value.

• A function that returns a string value.

Why can't function pointers be optimized by the compiler?

• They require user input.

• They are invoked through their address.

• They are only used for global functions.

• They are too complex to analyze.

What is a disadvantage of using global functions with function pointers?

• They cannot maintain a state.

• They can have multiple states.

• They cannot be used in sorting algorithms.

• They are slower than local functions.

What alternative to function pointers is introduced for implementing callbacks?

• Inline functions

• Global variables

• Function objects

• Function templates

What will be discussed in the next video following this one?

• Advanced sorting algorithms

• Function objects

• Inline function optimization

• Global function states