What are the differences between lambda expressions and function objects in C++?

What are the differences between lambda expressions and function objects in C++?

Lambda expressions are anonymous functions defined inline, while function objects are instances of classes with an overloaded operator().

Can you give me an example of a lambda expression?

Sure! Here's a simple example: auto add = [](int a, int b) { return a + b; }; This defines a lambda that adds two integers.

How do function objects compare in terms of performance?

Function objects can be more efficient in some cases because they can maintain state and be optimized by the compiler.

When should I use lambda expressions instead of function objects?

Use lambda expressions for short, simple functions that are used once or twice, and function objects for more complex or reusable logic.