What are initializer lists in C++?

What are initializer lists in C++?

Initializer lists in C++ are a way to initialize class members when an object is created, using a colon followed by the member initializations.

Can you give me an example of how to use them?

Sure! Here's a simple example:

class Point {
public:
    int x, y;
    Point(int xVal, int yVal) : x(xVal), y(yVal) {}
};

In this example, x and y are initialized using an initializer list.

What are the benefits of using initializer lists?

Using initializer lists can improve performance by directly initializing members rather than assigning values after the object is created. It also allows for the initialization of const members and references.

Are there any drawbacks to using them?

One drawback is that if you forget to initialize a member in the list, it will remain uninitialized, which can lead to undefined behavior. Additionally, the syntax can be less intuitive for beginners.