What are some examples of C++ lambda functions?

Can you give me some examples of C++ lambda functions?

Sure! A lambda function in C++ is an anonymous function that can be defined in-line. For example:

auto add = [](int a, int b) { return a + b; };

This creates a lambda that adds two integers.

What about using lambda functions with STL algorithms?

Great question! You can use lambda functions with STL algorithms like std::sort. For example:

std::vector<int> vec = {1, 5, 3, 4, 2};
std::sort(vec.begin(), vec.end(), [](int a, int b) { return a < b; });

This sorts the vector in ascending order.

Can you explain capturing variables in lambda functions?

Absolutely! You can capture variables by value or by reference. For example:

int x = 10;
auto lambda = [x](int y) { return x + y; };

This captures x by value. If you want to capture it by reference, use &x.

Are there any limitations to using lambda functions?

Yes, lambda functions cannot have default arguments, and they cannot be recursive unless you use a std::function to define them. Also, they must be defined in the scope where they are used.