The const keyword used with the function declaration specifies that it is a const member function and it will not be able to change the data members of the object.

It is possible to loosen the "const function" restriction of not allowing the function to write to any variable of a class. To allow some of the variables to be writable even when the function is …

You can still call const member functions on non-constant objects. Also note that the const modifier is part of the member function signature, which means you can overload it with a non …

Making a member function means that it cannot call any non-const member functions it cannot change any member variables. it can be called by a const object (const objects can only call …

Jun 3, 2025 · The second const means that the member function promises not to mutate any member variables. Are there any redundancies? This is not the same question as e.g. …

If the member is static, the const member is an immutable value shared by all class instances. If the member is non-static, the const member is immutable, but may vary with every …

If you have specific class members that need to be modifiable in const member functions, you can declare them mutable. An example would be a member lock_guard that makes the class's …

Dec 15, 2013 · I think that you read the first question differently than me. The proposed definition was "it could only access constant members." A const member function can access non …

constexpr declares an object as fit for use in what the Standard calls constant expressions. But note that constexpr is not the only way to do this. When applied to functions the basic …

Aug 12, 2011 · A static member function does not have a this pointer (such a function is not called on a particular instance of a class), so const qualification of a static member function doesn't …