1 #ifndef BOOST_EXTENDED_TYPE_INFO_NO_RTTI_HPP

     2 #define BOOST_EXTENDED_TYPE_INFO_NO_RTTI_HPP

     3 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8

     4 // MS compatible compilers support #pragma once

     5 #if defined(_MSC_VER) && (_MSC_VER >= 1020)

     6 # pragma once

     7 #endif

     8 

     9 // extended_type_info_no_rtti.hpp: implementation for version that depends

    10 // on runtime typing (rtti - typeid) but uses a user specified string

    11 // as the portable class identifier.

    12 

    13 // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com . 

    14 // Use, modification and distribution is subject to the Boost Software

    15 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at

    16 // http://www.boost.org/LICENSE_1_0.txt)

    17 

    18 //  See http://www.boost.org for updates, documentation, and revision history.

    19 #include <cassert>

    20 #include <boost/config.hpp>

    21 #include <boost/static_assert.hpp>

    22 #include <boost/type_traits/is_const.hpp>

    23 

    24 #include <boost/serialization/extended_type_info.hpp>

    25 #include <boost/mpl/bool.hpp>

    26 

    27 #include <boost/config/abi_prefix.hpp> // must be the last header

    28 #ifdef BOOST_MSVC

    29 #  pragma warning(push)

    30 #  pragma warning(disable : 4251 4231 4660 4275)

    31 #endif

    32 

    33 namespace boost {

    34 namespace serialization {

    35 namespace detail {

    36 ///////////////////////////////////////////////////////////////////////

    37 // define a special type_info that doesn't depend on rtti which is not

    38 // available in all situations.

    39 

    40 // common base class to share type_info_key.  This is used to 

    41 // identify the method used to keep track of the extended type

    42 class BOOST_SERIALIZATION_DECL(BOOST_PP_EMPTY()) extended_type_info_no_rtti_0 : 

    43     public extended_type_info

    44 {

    45     virtual bool

    46     less_than(const boost::serialization::extended_type_info &rhs) const ;

    47 protected:

    48     extended_type_info_no_rtti_0();

    49     // account for bogus gcc warning

    50     #if defined(__GNUC__)

    51     virtual

    52     #endif

    53     ~extended_type_info_no_rtti_0();

    54 public:

    55     struct is_polymorphic

    56     {

    57         typedef boost::mpl::bool_<true> type;

    58         BOOST_STATIC_CONSTANT(bool, value = is_polymorphic::type::value);

    59     };

    60 };

    61 

    62 template<class T>

    63 class extended_type_info_no_rtti_1 : 

    64     public extended_type_info_no_rtti_0

    65 {

    66 protected:

    67     extended_type_info_no_rtti_1(){}

    68 public:

    69     // note borland complains at making this destructor protected

    70     ~extended_type_info_no_rtti_1(){};

    71     static const boost::serialization::extended_type_info *

    72     get_derived_extended_type_info(const T & t){

    73         // find the type that corresponds to the most derived type.

    74         // this implementation doesn't depend on typeid() but assumes

    75         // that the specified type has a function of the following signature.

    76         // A common implemention of such a function is to define as a virtual

    77         // function. 

    78         const char * derived_key = t.get_key();

    79         assert(NULL != derived_key);

    80         return boost::serialization::extended_type_info::find(derived_key);

    81     }

    82     static boost::serialization::extended_type_info *

    83     get_instance(){

    84         static extended_type_info_no_rtti_1<T> instance;

    85         return & instance;

    86     }

    87     static void

    88     export_register(const char * key){

    89         boost::serialization::extended_type_info * eti;

    90         eti = get_instance();

    91         eti->key_register(key);  // initialize key and add to table

    92         eti->self_register();    // add type to type table

    93     }

    94 };

    95 } // namespace detail

    96 

    97 template<class T>

    98 class extended_type_info_no_rtti : 

    99     public detail::extended_type_info_no_rtti_1<const T>

   100 {

   101     // private constructor to inhibit any existence other than the 

   102     // static one

   103     extended_type_info_no_rtti(){}

   104     ~extended_type_info_no_rtti(){};

   105 };

   106 

   107 } // namespace serialization

   108 } // namespace boost

   109 

   110 ///////////////////////////////////////////////////////////////////////////////

   111 // If no other implementation has been designated as default, 

   112 // use this one.  To use this implementation as the default, specify it

   113 // before any of the other headers.

   114 

   115 #ifndef BOOST_SERIALIZATION_DEFAULT_TYPE_INFO

   116     #define BOOST_SERIALIZATION_DEFAULT_TYPE_INFO

   117     namespace boost {

   118     namespace serialization {

   119     template<class T>

   120     struct extended_type_info_impl {

   121         typedef BOOST_DEDUCED_TYPENAME 

   122             boost::serialization::extended_type_info_no_rtti<const T> type;

   123     };

   124     } // namespace serialization

   125     } // namespace boost

   126 #endif

   127 

   128 #ifdef BOOST_MSVC

   129 #pragma warning(pop)

   130 #endif

   131 #include <boost/config/abi_suffix.hpp> // pops abi_suffix.hpp pragmas

   132 

   133 #endif // BOOST_EXTENDED_TYPE_INFO_NO_RTTI_HPP