What are some tips for ensuring const correctness in C++?

What are some tips for ensuring const correctness in C++?

To ensure const correctness in C++, always use 'const' for variables that should not change after initialization. This includes function parameters and return types when applicable.

Can you give an example of a function that uses const correctly?

Sure! Here's an example:

int getValue(const int* ptr) {
    return *ptr;
}

In this function, the pointer to an integer is marked as const, ensuring that the function does not modify the value it points to.

What about member functions in classes?

Good question! For member functions, you can declare them as 'const' to indicate they do not modify the object's state. For example:

class MyClass {
public:
    int getValue() const {
        return value;
    }
private:
    int value;
};

Are there any tools to help with const correctness?

Yes, tools like Clang-Tidy can help identify const correctness issues in your code. They provide automated checks and suggestions.