Re: [Boost-users] Using SFINAE to detect presence of member function - Unreliable

Subject: Re: [Boost-users] Using SFINAE to detect presence of member function - Unreliable
From: Roman Perepelitsa (roman.perepelitsa_at_[hidden])
Date: 2009-02-02 04:56:30

2009/1/31 Naik, Roshan <roshan.naik_at_[hidden]>

>  > Maybe this one does what you need:
> >
> http://groups.google.com/group/comp.lang.c++.moderated/tree/browse_frm/thread/4f7c7a96f9afbe44/c95a7b4c645e449f#doc_e5fbc9305539f699
>
>
> Thanks Roman. It is kind of amazing!  Both has_member<> and
> is_call_possible<> are very interesting (even if a bit ugly).
>
>
>
> But is_call_possible doesn't seem to work for member functions that don't
> have any arguments.  I tried twiddling with the implementation a bit and no
> luck yet.
>

Sorry, I don't know how to make it work for functions without arguments.
Problem is that this program is invalid:
void foo() {}
void foo(...) {}

int main() {
  foo();  // Ambiguous.
}

Roman Perepelitsa.