C++: Lambda Expressions vs Function Objects

What are the main 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 in C++?

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

When should I use lambda expressions instead of function objects?

Use lambda expressions for short, simple functions that are used once or in a limited scope. Function objects are better for reusable, complex logic.

Are there any performance differences between the two?

Generally, lambda expressions can be more efficient due to their inline nature, but the difference is often negligible. It depends on the context.