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

Revision 857, 1.6 KB checked in by igarcia, 19 years ago (diff)
Line 
1
2#ifndef BOOST_MPL_AUX_PUSH_FRONT_IMPL_HPP_INCLUDED
3#define BOOST_MPL_AUX_PUSH_FRONT_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_front_impl.hpp,v $
14// $Date: 2004/09/02 15:40:44 $
15// $Revision: 1.4 $
16
17#include <boost/mpl/push_front_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_front' implementation below
27
28template< typename Tag >
29struct push_front_impl
30{
31    template< typename Sequence, typename T > struct apply {};
32};
33
34template< typename Tag >
35struct has_push_front_impl
36{
37    template< typename Seq > struct apply
38#if !defined(BOOST_MPL_CFG_NO_NESTED_FORWARDING)
39        : aux::has_type< push_front<Seq,int> >
40    {
41#else
42    {
43        typedef aux::has_type< push_front<Seq,int> > type;
44        BOOST_STATIC_CONSTANT(bool, value =
45              (aux::has_type< push_front<Seq,int> >::value)
46            );
47#endif
48    };
49};
50
51BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC(2, push_front_impl)
52BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC(1, has_push_front_impl)
53
54}}
55
56#endif // BOOST_MPL_AUX_PUSH_FRONT_IMPL_HPP_INCLUDED
Note: See TracBrowser for help on using the repository browser.