ceph/src/boost/libs/utility/include/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 #define  BOOST_PP_ITERATION_LIMITS (0, BOOST_MAX_INPLACE_FACTORY_ARITY)
  23 #define  BOOST_PP_FILENAME_1 <boost/utility/in_place_factory.hpp>
  24 #include BOOST_PP_ITERATE()
  25
  26 } // namespace boost
  27
  28 #include <boost/utility/detail/in_place_factory_suffix.hpp>
  29
  30 #define BOOST_UTILITY_INPLACE_FACTORY_04APR2007_HPP
  31 #else
  32 #define N BOOST_PP_ITERATION()
  33
  34 #if N
  35 template< BOOST_PP_ENUM_PARAMS(N, class A) >
  36 #endif
  37 class BOOST_PP_CAT(in_place_factory,N)
  38   :
  39   public in_place_factory_base
  40 {
  41 public:
  42
  43   explicit BOOST_PP_CAT(in_place_factory,N)
  44       ( BOOST_PP_ENUM_BINARY_PARAMS(N,A,const& a) )
  45 #if N > 0
  46     : BOOST_PP_ENUM(N, BOOST_DEFINE_INPLACE_FACTORY_CLASS_MEMBER_INIT, _)
  47 #endif
  48   {}
  49
  50   template<class T>
  51   void* apply(void* address) const
  52   {
  53     return new(address) T( BOOST_PP_ENUM_PARAMS(N, m_a) );
  54   }
  55
  56   template<class T>
  57   void* apply(void* address, std::size_t n) const
  58   {
  59     for(char* next = address = this->BOOST_NESTED_TEMPLATE apply<T>(address);
  60         !! --n;)
  61       this->BOOST_NESTED_TEMPLATE apply<T>(next = next+sizeof(T));
  62     return address;
  63   }
  64
  65   BOOST_PP_REPEAT(N, BOOST_DEFINE_INPLACE_FACTORY_CLASS_MEMBER_DECL, _)
  66 };
  67
  68 #if N > 0
  69 template< BOOST_PP_ENUM_PARAMS(N, class A) >
  70 inline BOOST_PP_CAT(in_place_factory,N)< BOOST_PP_ENUM_PARAMS(N, A) >
  71 in_place( BOOST_PP_ENUM_BINARY_PARAMS(N, A, const& a) )
  72 {
  73   return BOOST_PP_CAT(in_place_factory,N)< BOOST_PP_ENUM_PARAMS(N, A) >
  74       ( BOOST_PP_ENUM_PARAMS(N, a) );
  75 }
  76 #else
  77 inline in_place_factory0 in_place()
  78 {
  79   return in_place_factory0();
  80 }
  81 #endif
  82
  83 #undef N
  84 #endif
  85 #endif
  86