Re: operator > Against Addresses Of Member Functions
On Sep 1, 8:14 am, Le Chaud Lapin <jaibudu...@gmail.com> 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:
template<void(X::*mem_fun)()>
void adapter(X* that)
{
(that->*mem_fun)();
}
int main()
{
return adapter<&X::f> < adapter<&X::g>;
}
--
Max
--
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