ceph/src/boost/boost/utility/in_place_factory.hpp

   1 // Copyright (C) 2003, Fernando Luis Cacciola Carballal.
   2 // Copyright (C) 2007, Tobias Schwinger.
   3 //
   4 // Use, modification, and distribution is subject to the Boost Software
   5 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   6 // http://www.boost.org/LICENSE_1_0.txt)
   7 //
   8 // See http://www.boost.org/libs/optional for documentation.
   9 //
  10 // You are welcome to contact the author at:
  11 //  fernando_cacciola@hotmail.com
  12 //
  13 #ifndef BOOST_UTILITY_INPLACE_FACTORY_04APR2007_HPP
  14 #ifndef BOOST_PP_IS_ITERATING
  15
  16 #include <boost/utility/detail/in_place_factory_prefix.hpp>
  17
  18 namespace boost {
  19
  20 class in_place_factory_base {} ;
  21
  22 #ifndef BOOST_UTILITY_DOCS
  23 #define  BOOST_PP_ITERATION_LIMITS (0, BOOST_MAX_INPLACE_FACTORY_ARITY)
  24 #define  BOOST_PP_FILENAME_1 <boost/utility/in_place_factory.hpp>
  25 #endif // BOOST_UTILITY_DOCS
  26
  27 #include BOOST_PP_ITERATE()
  28
  29 } // namespace boost
  30
  31 #include <boost/utility/detail/in_place_factory_suffix.hpp>
  32
  33 #ifndef BOOST_UTILITY_DOCS
  34 #define BOOST_UTILITY_INPLACE_FACTORY_04APR2007_HPP
  35 #endif
  36
  37 #else
  38 #define N BOOST_PP_ITERATION()
  39
  40 #if N
  41 template< BOOST_PP_ENUM_PARAMS(N, class A) >
  42 #endif
  43 class BOOST_PP_CAT(in_place_factory,N)
  44   :
  45   public in_place_factory_base
  46 {
  47 public:
  48
  49   explicit BOOST_PP_CAT(in_place_factory,N)
  50       ( BOOST_PP_ENUM_BINARY_PARAMS(N,A,const& a) )
  51 #if N > 0
  52     : BOOST_PP_ENUM(N, BOOST_DEFINE_INPLACE_FACTORY_CLASS_MEMBER_INIT, _)
  53 #endif
  54   {}
  55
  56   template<class T>
  57   void* apply(void* address) const
  58   {
  59     return new(address) T( BOOST_PP_ENUM_PARAMS(N, m_a) );
  60   }
  61
  62   template<class T>
  63   void* apply(void* address, std::size_t n) const
  64   {
  65     for(char* next = address = this->BOOST_NESTED_TEMPLATE apply<T>(address);
  66         !! --n;)
  67       this->BOOST_NESTED_TEMPLATE apply<T>(next = next+sizeof(T));
  68     return address;
  69   }
  70
  71   BOOST_PP_REPEAT(N, BOOST_DEFINE_INPLACE_FACTORY_CLASS_MEMBER_DECL, _)
  72 };
  73
  74 #if N > 0
  75 template< BOOST_PP_ENUM_PARAMS(N, class A) >
  76 inline BOOST_PP_CAT(in_place_factory,N)< BOOST_PP_ENUM_PARAMS(N, A) >
  77 in_place( BOOST_PP_ENUM_BINARY_PARAMS(N, A, const& a) )
  78 {
  79   return BOOST_PP_CAT(in_place_factory,N)< BOOST_PP_ENUM_PARAMS(N, A) >
  80       ( BOOST_PP_ENUM_PARAMS(N, a) );
  81 }
  82 #else
  83 inline in_place_factory0 in_place()
  84 {
  85   return in_place_factory0();
  86 }
  87 #endif
  88
  89 #undef N
  90 #endif
  91 #endif
  92