Re: [boost] Re: Small thing: yes_type and no_type made public?

From: Paul Mensonides (pmenso57_at_[hidden])
Date: 2003-01-09 14:41:18

----- Original Message -----
From: "Terje Slettebø" <tslettebo_at_[hidden]>

> Looks good. What should we call it? size_descriptor, like here?

I'm not suggesting you do it exactly that way.  Rather, I'm just suggesting
that you don't use the pp-lib for something so trivially solved by the
template mechanism.  As Dave mentioned, the Python lib already has such a
thing--though, if I recall correctly, it is being used as a workaround for
certain compilers.  I personally don't even bother with the typedefs:

template<class T> struct is_class {
    private:
        template<class U> static char check(int U::*);
        template<class U> static char (& check(...))[2];
    public:
        static const bool value = sizeof(check<T>(0)) == 1;
};

template<class T> const bool is_class<T>::value;

Paul Mensonides