source: NonGTP/Boost/boost/mpl/aux_/push_back_impl.hpp @ 857

Revision 857, 1.6 KB checked in by igarcia, 19 years ago (diff)
Line 
1
2#ifndef BOOST_MPL_AUX_PUSH_BACK_IMPL_HPP_INCLUDED
3#define BOOST_MPL_AUX_PUSH_BACK_IMPL_HPP_INCLUDED
4
5// Copyright Aleksey Gurtovoy 2000-2004
6//
7// Distributed under the Boost Software License, Version 1.0.
8// (See accompanying file LICENSE_1_0.txt or copy at
9// http://www.boost.org/LICENSE_1_0.txt)
10//
11// See http://www.boost.org/libs/mpl for documentation.
12
13// $Source: /cvsroot/boost/boost/boost/mpl/aux_/push_back_impl.hpp,v $
14// $Date: 2004/09/02 15:40:44 $
15// $Revision: 1.4 $
16
17#include <boost/mpl/push_back_fwd.hpp>
18#include <boost/mpl/aux_/has_type.hpp>
19#include <boost/mpl/aux_/traits_lambda_spec.hpp>
20#include <boost/mpl/aux_/config/forwarding.hpp>
21#include <boost/mpl/aux_/config/static_constant.hpp>
22
23namespace boost { namespace mpl {
24
25// agurt 05/feb/04: no default implementation; the stub definition is needed
26// to enable the default 'has_push_back' implementation below
27template< typename Tag >
28struct push_back_impl
29{
30    template< typename Sequence, typename T > struct apply {};
31};
32
33template< typename Tag >
34struct has_push_back_impl
35{
36    template< typename Seq > struct apply
37#if !defined(BOOST_MPL_CFG_NO_NESTED_FORWARDING)
38        : aux::has_type< push_back<Seq,int> >
39    {
40#else
41    {
42        typedef aux::has_type< push_back<Seq,int> > type;
43        BOOST_STATIC_CONSTANT(bool, value =
44              (aux::has_type< push_back<Seq,int> >::value)
45            );
46#endif
47    };
48};
49
50BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC(2, push_back_impl)
51BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC(1, has_push_back_impl)
52
53}}
54
55#endif // BOOST_MPL_AUX_PUSH_BACK_IMPL_HPP_INCLUDED
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