Re: operator > Against Addresses Of Member Functions

Maxim Yegorushkin <>
Mon, 1 Sep 2008 04:58:53 CST
On Sep 1, 8:14 am, Le Chaud Lapin <> wrote:

Hi All,

What's the preferred method for ascertaining truth of

p1 > p2

when p1 and p2 are both pointers to potentially different member
functions of the same concrete class?

I could obviously do a memcmp (p1, p2, sizeof(p1)), but that might
lead to different ordering on different platforms, which, at present,
is not a problem for me, but still makes me uneasy.

One way to do this is to use regular functions as adapters and compare
the addresses of those adapters:

   struct X
       void f();
       void g();

   // adapters
   void f(X* that) { that->f(); }
   void g(X* that) { that->g(); }

   int main()
       return f > g;

A function template could be used as an adapter as well:

   void adapter(X* that)

   int main()
       return adapter<&X::f> < adapter<&X::g>;


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