boost/utility/typed_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/lib/optional for documentation.
   9 //
  10 // You are welcome to contact the author at:
  11 //  fernando_cacciola@hotmail.com
  12 //
  13 #ifndef BOOST_UTILITY_TYPED_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 typed_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/typed_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_TYPED_INPLACE_FACTORY_04APR2007_HPP
  31 #else
  32 #define N BOOST_PP_ITERATION()
  33
  34 template< class T BOOST_PP_ENUM_TRAILING_PARAMS(N,class A) >
  35 class BOOST_PP_CAT(typed_in_place_factory,N)
  36   :
  37   public typed_in_place_factory_base
  38 {
  39 public:
  40
  41   typedef T value_type;
  42
  43   explicit BOOST_PP_CAT(typed_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   void* apply (void* address) const
  51   {
  52     return new(address) T( BOOST_PP_ENUM_PARAMS(N, m_a) );
  53   }
  54
  55   void* apply (void* address, std::size_t n) const
  56   {
  57     for(void* next = address = this->apply(address); !! --n;)
  58       this->apply(next = static_cast<char *>(next) + sizeof(T));
  59     return address;
  60   }
  61
  62   BOOST_PP_REPEAT(N, BOOST_DEFINE_INPLACE_FACTORY_CLASS_MEMBER_DECL, _)
  63 };
  64
  65 template< class T BOOST_PP_ENUM_TRAILING_PARAMS(N, class A) >
  66 inline BOOST_PP_CAT(typed_in_place_factory,N)<
  67     T BOOST_PP_ENUM_TRAILING_PARAMS(N, A) >
  68 in_place( BOOST_PP_ENUM_BINARY_PARAMS(N, A, const& a) )
  69 {
  70   return BOOST_PP_CAT(typed_in_place_factory,N)<
  71       T BOOST_PP_ENUM_TRAILING_PARAMS(N, A) >( BOOST_PP_ENUM_PARAMS(N, a) );
  72 }
  73
  74 #undef N
  75 #endif
  76 #endif
  77