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 (at) 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 52 BOOST_APPEND_EXPLICIT_TEMPLATE_TYPE(T)) const 53 { 54 return new(address) T( BOOST_PP_ENUM_PARAMS(N, m_a) ); 55 } 56 57 template<class T> 58 void* apply(void* address, std::size_t n 59 BOOST_APPEND_EXPLICIT_TEMPLATE_TYPE(T)) const 60 { 61 for(char* next = address = this->BOOST_NESTED_TEMPLATE apply<T>(address); 62 !! --n;) 63 this->BOOST_NESTED_TEMPLATE apply<T>(next = next+sizeof(T)); 64 return address; 65 } 66 67 BOOST_PP_REPEAT(N, BOOST_DEFINE_INPLACE_FACTORY_CLASS_MEMBER_DECL, _) 68 }; 69 70 #if N > 0 71 template< BOOST_PP_ENUM_PARAMS(N, class A) > 72 inline BOOST_PP_CAT(in_place_factory,N)< BOOST_PP_ENUM_PARAMS(N, A) > 73 in_place( BOOST_PP_ENUM_BINARY_PARAMS(N, A, const& a) ) 74 { 75 return BOOST_PP_CAT(in_place_factory,N)< BOOST_PP_ENUM_PARAMS(N, A) > 76 ( BOOST_PP_ENUM_PARAMS(N, a) ); 77 } 78 #else 79 inline in_place_factory0 in_place() 80 { 81 return in_place_factory0(); 82 } 83 #endif 84 85 #undef N 86 #endif 87 #endif 88 89
