What are some examples of lambda capture in C++?

Can you explain lambda capture in C++ with some examples?

Sure! Lambda capture allows you to use variables from the surrounding scope in a lambda function. For example, if you have a variable x, you can capture it by value or by reference.

Could you show me a code example of capturing by value?

Absolutely! Here's a simple example:

int x = 10;
auto lambda = [x]() { return x + 5; };
std::cout << lambda(); // Outputs 15

In this case, x is captured by value.

What about capturing by reference?

Here's how you can capture by reference:

int x = 10;
auto lambda = [&x]() { x += 5; };
lambda();
std::cout << x; // Outputs 15

Here, x is modified because it's captured by reference.

Thanks! Are there any limitations to lambda capture?

Yes, one limitation is that you cannot capture variables that are out of scope. Also, if you capture by reference, you need to ensure the referenced variable remains valid.