[boost] Re: Object Hierarchies using Interface Types with the BIL

From: Reece Dunn (msclrhd_at_[hidden])
Date: 2004-12-31 04:26:48

christopher diggins wrote:
> On the subject of GUI object hierarchies, I wanted to bring to 
> everyone's attention the Boost Interfaces Library (BIL) currently being 
> developed by Jonathan Turkanis which could be an excellent tool for 
> building a flexible and efficient GUI library. There is a brief 
> introduction to the library on the Boost wiki ( 
> http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl?Boost.Interfaces 
> )
> 
> The code for declaring the interfaces would look like this:
> 
> BOOST_IDL_BEGIN(ILabel)
>  BOOST_IDL_CONST_FN0(GetText, string)
>  BOOST_IDL_CONST_FN0(GetAlignment, align_T)
> BOOST_IDL_END(ILabel)

What I am trying to get working is:

15: BOOST_IDL_BEGIN(IUIObject)
16:    BOOST_IDL_FN4(move, void, g::metric, g::metric, g::metric, g::metric)
17:    BOOST_IDL_FN2(move, void, g::metric, g::metric)
18:    inline void move( g::point p )
19:    {
20:       move( p.x, p.y );
21:    }
22: BOOST_IDL_END(IUIObject)

with the latest CVS of Boost, but with msvc-8.0, I get:

phase1.cpp(16): error C2061: syntax error : identifier 
'BOOST_PP_TUPLE_ELEM_2_0'
phase1.cpp(16): see reference to class template instantiation 
'IUIObject_interface_impl_::generator_impl<Derived_,Flags_,Base_>::tracker_<boost::mpl::int_<N>,Dummy_>::type::interface_functions<XXX_>' 
being compiled
with
[
N=1
]

Any suggestions? Is there a version of the BIL that works with the CVS 
version (or 1.33) of Boost? And is the above valid, since this is the 
kind of thing I want?

Regards,
Reece