> boost/proto/matches.hpp:391:13: error: invalid use of incomplete type
> 'struct boost::proto::detail::uncvref<arity_caller::CanBeCalled<Plus2,
> mpl_::integral_c<int, 2> > >::type'
> Now look at how you've defined CanBeCalled:
> template<typename Fun, typename Int>
> struct CanBeCalled;
Thanks. I added another specialisation for mpl::integral_c<int, n> > and it
worked. But, now I'm wondering why on earth was that basically needed? I had
never touched mpl::integral_c in my code snippet. That should have been
generated by Proto then, right? And, in that case, may I please know why?
On the other hand, I'm wondering why GCC never nagged about the need for
mpl::integral_c<int, 1> when I wrote:
EW1<InpPool, GameState, AmmoMsg>() >> Plus1();
In other words, why is mpl::int_<n> used for the above line (when n == 1),
whereas mpl::integral_c<int, n> is used for the following one (when n == 2)?
(EW1<InpPool, GameState, AmmoMsg>() || EW1<InpPool, GameState, AmmoMsg>()) >>
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