What are some examples of lambda expressions in C++17?

What are some examples of lambda expressions in C++17?

C++17 introduced several enhancements to lambda expressions. For example, you can now use 'constexpr' with lambdas. Here's a simple example:

auto add = [](int a, int b) { return a + b; };
int result = add(5, 3); // result is 8

Would you like to see more complex examples?

Yes, can you show me an example with capture by value and reference?

Sure! Here's an example that demonstrates both capture by value and by reference:

int x = 10;
auto lambda = [x, &x]() {
    return x + 5;
};

x = 20;
int result = lambda(); // result is 15, captures x by value

In this case, the lambda captures 'x' by value, so it uses the original value of 10. Would you like to explore more features?

What about using lambdas with STL algorithms?

Great question! You can use lambdas with STL algorithms like 'std::sort'. Here's an example:

std::vector<int> vec = {5, 2, 8, 1};
std::sort(vec.begin(), vec.end(), [](int a, int b) { return a < b; });

This sorts the vector in ascending order using a lambda for comparison. Would you like to see more examples or details?