putting function definitions in header files

Question

If you want to put function definitions in header files, it appears there are three different solutions:

1. mark the function as inline
2. mark the

Answer 1

You could consider wrapping the methods in a class instead of a namespace. Declare these methods as static and delete the constructor of the class to reinforce that this is not an object to be instantiated.

struct FooNamespace
{
    FooNamespace() = delete;

    static FooMethod1() {
        ...
    }
    static FooMethod2() {
        ...
    }

};

You get the same general behavior as it belonging to a namespace with only a single implementation.