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Jeff Thompsonf7d49942013-08-01 16:47:40 -07001
Jeff Thompson3d613fd2013-10-15 15:39:04 -07002#ifndef NDNBOOST_MPL_AUX_YES_NO_HPP_INCLUDED
3#define NDNBOOST_MPL_AUX_YES_NO_HPP_INCLUDED
Jeff Thompsonf7d49942013-08-01 16:47:40 -07004
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// $Id: yes_no.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
14// $Date: 2008-10-10 23:19:02 -0700 (Fri, 10 Oct 2008) $
15// $Revision: 49267 $
16
Jeff Thompson2277ce52013-08-01 17:34:11 -070017#include <ndnboost/mpl/aux_/nttp_decl.hpp>
18#include <ndnboost/mpl/aux_/config/arrays.hpp>
19#include <ndnboost/mpl/aux_/config/msvc.hpp>
20#include <ndnboost/mpl/aux_/config/workaround.hpp>
Jeff Thompsonf7d49942013-08-01 16:47:40 -070021
22
23namespace ndnboost { namespace mpl { namespace aux {
24
25typedef char (&no_tag)[1];
26typedef char (&yes_tag)[2];
27
28template< bool C_ > struct yes_no_tag
29{
30 typedef no_tag type;
31};
32
33template<> struct yes_no_tag<true>
34{
35 typedef yes_tag type;
36};
37
38
Jeff Thompson3d613fd2013-10-15 15:39:04 -070039template< NDNBOOST_MPL_AUX_NTTP_DECL(long, n) > struct weighted_tag
Jeff Thompsonf7d49942013-08-01 16:47:40 -070040{
Jeff Thompson3d613fd2013-10-15 15:39:04 -070041#if !NDNBOOST_WORKAROUND(NDNBOOST_MSVC, < 1300)
Jeff Thompsonf7d49942013-08-01 16:47:40 -070042 typedef char (&type)[n];
43#else
44 char buf[n];
45 typedef weighted_tag type;
46#endif
47};
48
Jeff Thompson3d613fd2013-10-15 15:39:04 -070049#if defined(NDNBOOST_MPL_CFG_NO_DEPENDENT_ARRAY_TYPES)
Jeff Thompsonf7d49942013-08-01 16:47:40 -070050template<> struct weighted_tag<0>
51{
52 typedef char (&type)[1];
53};
54#endif
55
56}}}
57
Jeff Thompson3d613fd2013-10-15 15:39:04 -070058#endif // NDNBOOST_MPL_AUX_YES_NO_HPP_INCLUDED