boostorg/optional
1
0
Fork 1
mirror of https://github.com/boostorg/optional.git synced 2025-08-01 05:24:32 +02:00
Code Issues Packages Projects Releases Wiki Activity

Moved from "utility" to "detail" until a Fast Track Review formalizes it.

Browse Source 
[SVN r20983]
This commit is contained in:
Fernando Cacciola
2003-11-28 14:36:21 +00:00
parent 2a85470f49
commit d469aff043
3 changed files with 144 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

56
include/boost/detail/in_place_factory.hpp Normal file
View File

@@ -0,0 +1,56 @@
// Copyright (C) 2003, Fernando Luis Cacciola Carballal.
//
// Use, modification, and distribution is subject to the Boost Software
// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
// See http://www.boost.org/lib/optional for documentation.
//
// You are welcome to contact the author at:
// fernando_cacciola@hotmail.com
//
#ifndef BOOST_UTILITY_INPLACE_FACTORY_25AGO2003_HPP
#define BOOST_UTILITY_INPLACE_FACTORY_25AGO2003_HPP
#include <boost/detail/in_place_factory_prefix.hpp>
#include <boost/type.hpp>
namespace boost {
class InPlaceFactoryBase {} ;
#define BOOST_DEFINE_INPLACE_FACTORY_CLASS(z,n,_) \
template< BOOST_PP_ENUM_PARAMS(BOOST_PP_INC(n),class A) > \
class BOOST_PP_CAT(InPlaceFactory, BOOST_PP_INC(n) ) : public InPlaceFactoryBase \
{ \
public: \
\
BOOST_PP_CAT(InPlaceFactory, BOOST_PP_INC(n) ) ( BOOST_PP_ENUM_BINARY_PARAMS(BOOST_PP_INC(n),A,const& a) ) \
: \
BOOST_PP_ENUM( BOOST_PP_INC(n), BOOST_DEFINE_INPLACE_FACTORY_CLASS_MEMBER_INIT, _ ) \
{} \
\
template<class T> \
void apply ( void* address BOOST_APPEND_EXPLICIT_TEMPLATE_TYPE(T) ) const \
{ \
new ( address ) T ( BOOST_PP_ENUM_PARAMS( BOOST_PP_INC(n), m_a ) ) ; \
} \
\
BOOST_PP_REPEAT( BOOST_PP_INC(n), BOOST_DEFINE_INPLACE_FACTORY_CLASS_MEMBER_DECL, _) \
} ; \
\
template< BOOST_PP_ENUM_PARAMS(BOOST_PP_INC(n),class A) > \
BOOST_PP_CAT(InPlaceFactory, BOOST_PP_INC(n) ) < BOOST_PP_ENUM_PARAMS( BOOST_PP_INC(n), A ) > \
in_place ( BOOST_PP_ENUM_BINARY_PARAMS(BOOST_PP_INC(n),A, const& a) ) \
{ \
return BOOST_PP_CAT(InPlaceFactory, BOOST_PP_INC(n) ) < BOOST_PP_ENUM_PARAMS( BOOST_PP_INC(n), A ) > \
( BOOST_PP_ENUM_PARAMS( BOOST_PP_INC(n), a ) ) ; \
} ; \
BOOST_PP_REPEAT( BOOST_MAX_INPLACE_FACTORY_ARITY, BOOST_DEFINE_INPLACE_FACTORY_CLASS, BOOST_PP_EMPTY() )
} // namespace boost
#endif