boost/type_traits/detail/bool_trait_def.hpp

   1
   2 // NO INCLUDE GUARDS, THE HEADER IS INTENDED FOR MULTIPLE INCLUSION
   3
   4 // Copyright Aleksey Gurtovoy 2002-2004
   5 //
   6 // Distributed under the Boost Software License, Version 1.0.
   7 // (See accompanying file LICENSE_1_0.txt or copy at
   8 // http://www.boost.org/LICENSE_1_0.txt)
   9
  10 // $Source$
  11 // $Date: 2006-07-12 07:10:22 -0400 (Wed, 12 Jul 2006) $
  12 // $Revision: 34511 $
  13
  14 #include <boost/type_traits/detail/template_arity_spec.hpp>
  15 #include <boost/type_traits/integral_constant.hpp>
  16 #include <boost/mpl/bool.hpp>
  17 #include <boost/mpl/aux_/lambda_support.hpp>
  18 #include <boost/config.hpp>
  19
  20 //
  21 // Unfortunately some libraries have started using this header without
  22 // cleaning up afterwards: so we'd better undef the macros just in case
  23 // they've been defined already....
  24 //
  25 #ifdef BOOST_TT_AUX_BOOL_TRAIT_VALUE_DECL
  26 #undef BOOST_TT_AUX_BOOL_TRAIT_VALUE_DECL
  27 #undef BOOST_TT_AUX_BOOL_C_BASE
  28 #undef BOOST_TT_AUX_BOOL_TRAIT_DEF1
  29 #undef BOOST_TT_AUX_BOOL_TRAIT_DEF2
  30 #undef BOOST_TT_AUX_BOOL_TRAIT_SPEC1
  31 #undef BOOST_TT_AUX_BOOL_TRAIT_SPEC2
  32 #undef BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1
  33 #undef BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC2
  34 #undef BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1
  35 #undef BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_2
  36 #undef BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC2_1
  37 #undef BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC2_2
  38 #undef BOOST_TT_AUX_BOOL_TRAIT_IMPL_PARTIAL_SPEC2_1
  39 #undef BOOST_TT_AUX_BOOL_TRAIT_CV_SPEC1
  40 #endif
  41
  42 #if defined(__SUNPRO_CC) && (__SUNPRO_CC < 0x570)
  43 #   define BOOST_TT_AUX_BOOL_TRAIT_VALUE_DECL(C) \
  44     typedef ::boost::integral_constant<bool,C> type; \
  45     enum { value = type::value }; \
  46     /**/
  47 #   define BOOST_TT_AUX_BOOL_C_BASE(C)
  48
  49 #elif defined(BOOST_MSVC) && BOOST_MSVC < 1300
  50
  51 #   define BOOST_TT_AUX_BOOL_TRAIT_VALUE_DECL(C) \
  52     typedef ::boost::integral_constant<bool,C> base_; \
  53     using base_::value; \
  54     /**/
  55
  56 #endif
  57
  58 #ifndef BOOST_TT_AUX_BOOL_TRAIT_VALUE_DECL
  59 #   define BOOST_TT_AUX_BOOL_TRAIT_VALUE_DECL(C) /**/
  60 #endif
  61
  62 #ifndef BOOST_TT_AUX_BOOL_C_BASE
  63 #   define BOOST_TT_AUX_BOOL_C_BASE(C) : ::boost::integral_constant<bool,C>
  64 #endif
  65
  66
  67 #define BOOST_TT_AUX_BOOL_TRAIT_DEF1(trait,T,C) \
  68 template< typename T > struct trait \
  69     BOOST_TT_AUX_BOOL_C_BASE(C) \
  70 { \
  71     BOOST_TT_AUX_BOOL_TRAIT_VALUE_DECL(C) \
  72     BOOST_MPL_AUX_LAMBDA_SUPPORT(1,trait,(T)) \
  73 }; \
  74 \
  75 BOOST_TT_AUX_TEMPLATE_ARITY_SPEC(1,trait) \
  76 /**/
  77
  78
  79 #define BOOST_TT_AUX_BOOL_TRAIT_DEF2(trait,T1,T2,C) \
  80 template< typename T1, typename T2 > struct trait \
  81     BOOST_TT_AUX_BOOL_C_BASE(C) \
  82 { \
  83     BOOST_TT_AUX_BOOL_TRAIT_VALUE_DECL(C) \
  84     BOOST_MPL_AUX_LAMBDA_SUPPORT(2,trait,(T1,T2)) \
  85 }; \
  86 \
  87 BOOST_TT_AUX_TEMPLATE_ARITY_SPEC(2,trait) \
  88 /**/
  89
  90 #define BOOST_TT_AUX_BOOL_TRAIT_SPEC1(trait,sp,C) \
  91 template<> struct trait< sp > \
  92     BOOST_TT_AUX_BOOL_C_BASE(C) \
  93 { \
  94     BOOST_TT_AUX_BOOL_TRAIT_VALUE_DECL(C) \
  95     BOOST_MPL_AUX_LAMBDA_SUPPORT_SPEC(1,trait,(sp)) \
  96 }; \
  97 /**/
  98
  99 #define BOOST_TT_AUX_BOOL_TRAIT_SPEC2(trait,sp1,sp2,C) \
 100 template<> struct trait< sp1,sp2 > \
 101     BOOST_TT_AUX_BOOL_C_BASE(C) \
 102 { \
 103     BOOST_TT_AUX_BOOL_TRAIT_VALUE_DECL(C) \
 104     BOOST_MPL_AUX_LAMBDA_SUPPORT_SPEC(2,trait,(sp1,sp2)) \
 105 }; \
 106 /**/
 107
 108 #define BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(trait,sp,C) \
 109 template<> struct trait##_impl< sp > \
 110 { \
 111     BOOST_STATIC_CONSTANT(bool, value = (C)); \
 112 }; \
 113 /**/
 114
 115 #define BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC2(trait,sp1,sp2,C) \
 116 template<> struct trait##_impl< sp1,sp2 > \
 117 { \
 118     BOOST_STATIC_CONSTANT(bool, value = (C)); \
 119 }; \
 120 /**/
 121
 122 #define BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(param,trait,sp,C) \
 123 template< param > struct trait< sp > \
 124     BOOST_TT_AUX_BOOL_C_BASE(C) \
 125 { \
 126     BOOST_TT_AUX_BOOL_TRAIT_VALUE_DECL(C) \
 127 }; \
 128 /**/
 129
 130 #define BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_2(param1,param2,trait,sp,C) \
 131 template< param1, param2 > struct trait< sp > \
 132     BOOST_TT_AUX_BOOL_C_BASE(C) \
 133 { \
 134     BOOST_TT_AUX_BOOL_TRAIT_VALUE_DECL(C) \
 135 }; \
 136 /**/
 137
 138 #define BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC2_1(param,trait,sp1,sp2,C) \
 139 template< param > struct trait< sp1,sp2 > \
 140     BOOST_TT_AUX_BOOL_C_BASE(C) \
 141 { \
 142     BOOST_TT_AUX_BOOL_TRAIT_VALUE_DECL(C) \
 143     BOOST_MPL_AUX_LAMBDA_SUPPORT_SPEC(2,trait,(sp1,sp2)) \
 144 }; \
 145 /**/
 146
 147 #define BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC2_2(param1,param2,trait,sp1,sp2,C) \
 148 template< param1, param2 > struct trait< sp1,sp2 > \
 149     BOOST_TT_AUX_BOOL_C_BASE(C) \
 150 { \
 151     BOOST_TT_AUX_BOOL_TRAIT_VALUE_DECL(C) \
 152 }; \
 153 /**/
 154
 155 #define BOOST_TT_AUX_BOOL_TRAIT_IMPL_PARTIAL_SPEC2_1(param,trait,sp1,sp2,C) \
 156 template< param > struct trait##_impl< sp1,sp2 > \
 157 { \
 158     BOOST_STATIC_CONSTANT(bool, value = (C)); \
 159 }; \
 160 /**/
 161
 162 #ifndef BOOST_NO_CV_SPECIALIZATIONS
 163 #   define BOOST_TT_AUX_BOOL_TRAIT_CV_SPEC1(trait,sp,value) \
 164     BOOST_TT_AUX_BOOL_TRAIT_SPEC1(trait,sp,value) \
 165     BOOST_TT_AUX_BOOL_TRAIT_SPEC1(trait,sp const,value) \
 166     BOOST_TT_AUX_BOOL_TRAIT_SPEC1(trait,sp volatile,value) \
 167     BOOST_TT_AUX_BOOL_TRAIT_SPEC1(trait,sp const volatile,value) \
 168     /**/
 169 #else
 170 #   define BOOST_TT_AUX_BOOL_TRAIT_CV_SPEC1(trait,sp,value) \
 171     BOOST_TT_AUX_BOOL_TRAIT_SPEC1(trait,sp,value) \
 172     /**/
 173 #endif