Re: [boost] any_function (callback) library

From: Peter Dimov (pdimov_at_[hidden])
Date: 2001-04-10 05:27:17

From: "Doug Gregor" <gregod_at_[hidden]>

> > static const int args = count_used_args<T1, T2, T3, T4, T5, T6>::value;
> > BOOST_STATIC_CONSTANT(int, oneh = one_hundred_if_void_fake<R>::value);
> > typedef typename _get_function_obj_invoker<args + oneh>::
> >
> > fixes the problem. (Likewise in get_function_invoker.)
>
> It appears to be a problem with the older EDG-based compilers, because
> MIPSpro 7.3 is broken in the same way. Looks like I'll need more #ifdefs,
> because the above fix will likely break Borland C++ (grrr).

You're right, it does break bcc32. However declaring the constants as enum's
works.

  enum { args = count_used_args<T1, T2, T3, T4, T5, T6>::value };
  enum { oneh = one_hundred_if_void_fake<R>::value };

Seems like the enum 'hack' is here to stay. [VC 7.0 can handle static
const's.]

--
Peter Dimov
Multi Media Ltd.