epoc32/include/stdapis/boost/multi_index/member.hpp
branchSymbian2
changeset 2 2fe1408b6811
     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/epoc32/include/stdapis/boost/multi_index/member.hpp	Tue Mar 16 16:12:26 2010 +0000
     1.3 @@ -0,0 +1,269 @@
     1.4 +/* Copyright 2003-2006 Joaquín M López Muñoz.
     1.5 + * Distributed under the Boost Software License, Version 1.0.
     1.6 + * (See accompanying file LICENSE_1_0.txt or copy at
     1.7 + * http://www.boost.org/LICENSE_1_0.txt)
     1.8 + *
     1.9 + * See http://www.boost.org/libs/multi_index for library home page.
    1.10 + */
    1.11 +
    1.12 +#ifndef BOOST_MULTI_INDEX_MEMBER_HPP
    1.13 +#define BOOST_MULTI_INDEX_MEMBER_HPP
    1.14 +
    1.15 +#if defined(_MSC_VER)&&(_MSC_VER>=1200)
    1.16 +#pragma once
    1.17 +#endif
    1.18 +
    1.19 +#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
    1.20 +#include <boost/mpl/if.hpp>
    1.21 +#include <boost/type_traits/is_const.hpp>
    1.22 +#include <boost/utility/enable_if.hpp>
    1.23 +#include <cstddef>
    1.24 +
    1.25 +#if !defined(BOOST_NO_SFINAE)
    1.26 +#include <boost/type_traits/is_convertible.hpp>
    1.27 +#endif
    1.28 +
    1.29 +namespace boost{
    1.30 +
    1.31 +template<class T> class reference_wrapper; /* fwd decl. */
    1.32 +
    1.33 +namespace multi_index{
    1.34 +
    1.35 +namespace detail{
    1.36 +
    1.37 +/* member is a read/write key extractor for accessing a given
    1.38 + * member of a class.
    1.39 + * Additionally, member is overloaded to support referece_wrappers
    1.40 + * of T and "chained pointers" to T's. By chained pointer to T we mean
    1.41 + * a type P  such that, given a p of Type P
    1.42 + *   *...n...*x is convertible to T&, for some n>=1.
    1.43 + * Examples of chained pointers are raw and smart pointers, iterators and
    1.44 + * arbitrary combinations of these (vg. T** or auto_ptr<T*>.)
    1.45 + */
    1.46 +
    1.47 +/* NB. Some overloads of operator() have an extra dummy parameter int=0.
    1.48 + * This disambiguator serves several purposes:
    1.49 + *  - Without it, MSVC++ 6.0 incorrectly regards some overloads as
    1.50 + *    specializations of a previous member function template.
    1.51 + *  - MSVC++ 6.0/7.0 seem to incorrectly treat some different memfuns
    1.52 + *    as if they have the same signature.
    1.53 + *  - If remove_const is broken due to lack of PTS, int=0 avoids the
    1.54 + *    declaration of memfuns with identical signature.
    1.55 + */
    1.56 +
    1.57 +template<class Class,typename Type,Type Class::*PtrToMember>
    1.58 +struct const_member_base
    1.59 +{
    1.60 +  typedef Type result_type;
    1.61 +
    1.62 +  template<typename ChainedPtr>
    1.63 +
    1.64 +#if !defined(BOOST_NO_SFINAE)
    1.65 +  typename disable_if<
    1.66 +    is_convertible<const ChainedPtr&,const Class&>,Type&>::type
    1.67 +#else
    1.68 +  Type&
    1.69 +#endif
    1.70 +  
    1.71 +  operator()(const ChainedPtr& x)const
    1.72 +  {
    1.73 +    return operator()(*x);
    1.74 +  }
    1.75 +
    1.76 +  Type& operator()(const Class& x)const
    1.77 +  {
    1.78 +    return x.*PtrToMember;
    1.79 +  }
    1.80 +
    1.81 +  Type& operator()(const reference_wrapper<const Class>& x)const
    1.82 +  {
    1.83 +    return operator()(x.get());
    1.84 +  }
    1.85 +
    1.86 +  Type& operator()(const reference_wrapper<Class>& x,int=0)const
    1.87 +  { 
    1.88 +    return operator()(x.get());
    1.89 +  }
    1.90 +};
    1.91 +
    1.92 +template<class Class,typename Type,Type Class::*PtrToMember>
    1.93 +struct non_const_member_base
    1.94 +{
    1.95 +  typedef Type result_type;
    1.96 +
    1.97 +  template<typename ChainedPtr>
    1.98 +
    1.99 +#if !defined(BOOST_NO_SFINAE)
   1.100 +  typename disable_if<
   1.101 +    is_convertible<const ChainedPtr&,const Class&>,Type&>::type
   1.102 +#else
   1.103 +  Type&
   1.104 +#endif
   1.105 +
   1.106 +  operator()(const ChainedPtr& x)const
   1.107 +  {
   1.108 +    return operator()(*x);
   1.109 +  }
   1.110 +
   1.111 +  const Type& operator()(const Class& x,int=0)const
   1.112 +  {
   1.113 +    return x.*PtrToMember;
   1.114 +  }
   1.115 +
   1.116 +  Type& operator()(Class& x)const
   1.117 +  { 
   1.118 +    return x.*PtrToMember;
   1.119 +  }
   1.120 +
   1.121 +  const Type& operator()(const reference_wrapper<const Class>& x,int=0)const
   1.122 +  {
   1.123 +    return operator()(x.get());
   1.124 +  }
   1.125 +
   1.126 +  Type& operator()(const reference_wrapper<Class>& x)const
   1.127 +  { 
   1.128 +    return operator()(x.get());
   1.129 +  }
   1.130 +};
   1.131 +
   1.132 +} /* namespace multi_index::detail */
   1.133 +
   1.134 +template<class Class,typename Type,Type Class::*PtrToMember>
   1.135 +struct member:
   1.136 +  mpl::if_c<
   1.137 +    is_const<Type>::value,
   1.138 +    detail::const_member_base<Class,Type,PtrToMember>,
   1.139 +    detail::non_const_member_base<Class,Type,PtrToMember>
   1.140 +  >::type
   1.141 +{
   1.142 +};
   1.143 +
   1.144 +namespace detail{
   1.145 +
   1.146 +/* MSVC++ 6.0 does not support properly pointers to members as
   1.147 + * non-type template arguments, as reported in
   1.148 + *   http://support.microsoft.com/default.aspx?scid=kb;EN-US;249045
   1.149 + * A similar problem (though not identical) is shown by MSVC++ 7.0.
   1.150 + * We provide an alternative to member<> accepting offsets instead
   1.151 + * of pointers to members. This happens to work even for non-POD
   1.152 + * types (although the standard forbids use of offsetof on these),
   1.153 + * so it serves as a workaround in this compiler for all practical
   1.154 + * purposes.
   1.155 + * Surprisingly enough, other compilers, like Intel C++ 7.0/7.1 and
   1.156 + * Visual Age 6.0, have similar bugs. This replacement of member<>
   1.157 + * can be used for them too.
   1.158 + */
   1.159 +
   1.160 +template<class Class,typename Type,std::size_t OffsetOfMember>
   1.161 +struct const_member_offset_base
   1.162 +{
   1.163 +  typedef Type result_type;
   1.164 +
   1.165 +  template<typename ChainedPtr>
   1.166 +
   1.167 +#if !defined(BOOST_NO_SFINAE)
   1.168 +  typename disable_if<
   1.169 +    is_convertible<const ChainedPtr&,const Class&>,Type&>::type
   1.170 +#else
   1.171 +  Type&
   1.172 +#endif 
   1.173 +    
   1.174 +  operator()(const ChainedPtr& x)const
   1.175 +  {
   1.176 +    return operator()(*x);
   1.177 +  }
   1.178 +
   1.179 +  Type& operator()(const Class& x)const
   1.180 +  {
   1.181 +    return *static_cast<const Type*>(
   1.182 +      static_cast<const void*>(
   1.183 +        static_cast<const char*>(
   1.184 +          static_cast<const void *>(&x))+OffsetOfMember));
   1.185 +  }
   1.186 +
   1.187 +  Type& operator()(const reference_wrapper<const Class>& x)const
   1.188 +  {
   1.189 +    return operator()(x.get());
   1.190 +  }
   1.191 +
   1.192 +  Type& operator()(const reference_wrapper<Class>& x,int=0)const
   1.193 +  {
   1.194 +    return operator()(x.get());
   1.195 +  }
   1.196 +};
   1.197 +
   1.198 +template<class Class,typename Type,std::size_t OffsetOfMember>
   1.199 +struct non_const_member_offset_base
   1.200 +{
   1.201 +  typedef Type result_type;
   1.202 +
   1.203 +  template<typename ChainedPtr>
   1.204 +
   1.205 +#if !defined(BOOST_NO_SFINAE)
   1.206 +  typename disable_if<
   1.207 +    is_convertible<const ChainedPtr&,const Class&>,Type&>::type
   1.208 +#else
   1.209 +  Type&
   1.210 +#endif 
   1.211 +  
   1.212 +  operator()(const ChainedPtr& x)const
   1.213 +  {
   1.214 +    return operator()(*x);
   1.215 +  }
   1.216 +
   1.217 +  const Type& operator()(const Class& x,int=0)const
   1.218 +  {
   1.219 +    return *static_cast<const Type*>(
   1.220 +      static_cast<const void*>(
   1.221 +        static_cast<const char*>(
   1.222 +          static_cast<const void *>(&x))+OffsetOfMember));
   1.223 +  }
   1.224 +
   1.225 +  Type& operator()(Class& x)const
   1.226 +  { 
   1.227 +    return *static_cast<Type*>(
   1.228 +      static_cast<void*>(
   1.229 +        static_cast<char*>(static_cast<void *>(&x))+OffsetOfMember));
   1.230 +  }
   1.231 +
   1.232 +  const Type& operator()(const reference_wrapper<const Class>& x,int=0)const
   1.233 +  {
   1.234 +    return operator()(x.get());
   1.235 +  }
   1.236 +
   1.237 +  Type& operator()(const reference_wrapper<Class>& x)const
   1.238 +  {
   1.239 +    return operator()(x.get());
   1.240 +  }
   1.241 +};
   1.242 +
   1.243 +} /* namespace multi_index::detail */
   1.244 +
   1.245 +template<class Class,typename Type,std::size_t OffsetOfMember>
   1.246 +struct member_offset:
   1.247 +  mpl::if_c<
   1.248 +    is_const<Type>::value,
   1.249 +    detail::const_member_offset_base<Class,Type,OffsetOfMember>,
   1.250 +    detail::non_const_member_offset_base<Class,Type,OffsetOfMember>
   1.251 +  >::type
   1.252 +{
   1.253 +};
   1.254 +
   1.255 +/* BOOST_MULTI_INDEX_MEMBER resolves to member in the normal cases,
   1.256 + * and to member_offset as a workaround in those defective compilers for
   1.257 + * which BOOST_NO_POINTER_TO_MEMBER_TEMPLATE_PARAMETERS is defined.
   1.258 + */
   1.259 +
   1.260 +#if defined(BOOST_NO_POINTER_TO_MEMBER_TEMPLATE_PARAMETERS)
   1.261 +#define BOOST_MULTI_INDEX_MEMBER(Class,Type,MemberName) \
   1.262 +::boost::multi_index::member_offset< Class,Type,offsetof(Class,MemberName) >
   1.263 +#else
   1.264 +#define BOOST_MULTI_INDEX_MEMBER(Class,Type,MemberName) \
   1.265 +::boost::multi_index::member< Class,Type,&Class::MemberName >
   1.266 +#endif
   1.267 +
   1.268 +} /* namespace multi_index */
   1.269 +
   1.270 +} /* namespace boost */
   1.271 +
   1.272 +#endif