Re: Destructor call of virtual base class - what happens with exception spec?

On Sep 14, 2:59 am, Vladimir Jovic <vladasp...@gmail.com> wrote:


I once saw something like the following nonignorable:

template<typename T>
class nonignorable {
    public:
        nonignorable(const T& t) : was_read(false), val(t) { }
        operator T() const { was_read = true; return val; }
        ~nonignorable() {
            if (!was_read)
                throw logic_error("you ignored me!");
         }
    private:
         bool was_read;
         T val;
};

The idea was to ensure that a function return value was used,
or explicitly ignored, e.g.:

nonignorable<int> somefunc()
{
    // do stuff
    return some_integer;
}