What are the limitations of C++ lambda expressions?

What are the limitations of C++ lambda expressions?

C++ lambda expressions have several limitations, such as not being able to capture by reference in certain contexts, and they cannot be used as default arguments.

Can you explain what capturing by reference means?

Capturing by reference means that the lambda can access variables from its surrounding scope by reference, allowing it to modify them. However, if the referenced variable goes out of scope, it can lead to undefined behavior.

Are there any performance issues with using lambdas?

In general, lambdas are efficient, but if they capture large objects by value, it can lead to performance overhead due to copying. It's best to capture only what you need.

Can lambdas be recursive?

Lambdas cannot directly call themselves recursively because they don't have a name. However, you can use std::function to achieve recursion.