forked from boostorg/fusion
119 lines
8.0 KiB
C++
119 lines
8.0 KiB
C++
/*=============================================================================
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Copyright (c) 2001-2009 Joel de Guzman
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Copyright (c) 2005-2006 Dan Marsden
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Copyright (c) 2010 Christopher Schmidt
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#ifndef BOOST_FUSION_ADAPTED_CLASS_DETAIL_ADAPT_BASE_HPP
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#define BOOST_FUSION_ADAPTED_CLASS_DETAIL_ADAPT_BASE_HPP
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#include <boost/preprocessor/control/if.hpp>
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#include <boost/preprocessor/seq/seq.hpp>
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#include <boost/preprocessor/seq/elem.hpp>
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#include <boost/mpl/if.hpp>
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#include <boost/type_traits/is_const.hpp>
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//cschmidt: Spirit relies on Fusion defining class_member_proxy in the
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//boost::fusion::extension namespace, with two nested types named lvalue and
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//rvalue.
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#define BOOST_FUSION_ADAPT_CLASS_GET_IDENTITY_TEMPLATE_IMPL(TEMPLATE_PARAMS_SEQ)\
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typename detail::get_identity< \
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lvalue \
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, BOOST_PP_SEQ_ELEM(1,TEMPLATE_PARAMS_SEQ) \
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>::type
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#define BOOST_FUSION_ADAPT_CLASS_GET_IDENTITY_NON_TEMPLATE_IMPL( \
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TEMPLATE_PARAMS_SEQ) \
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\
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lvalue
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#define BOOST_FUSION_ADAPT_CLASS_C_BASE(\
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TEMPLATE_PARAMS_SEQ,NAME_SEQ,I,ATTRIBUTE,ATTRIBUTE_TUPEL_SIZE) \
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\
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template< \
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BOOST_FUSION_ADAPT_STRUCT_UNPACK_TEMPLATE_PARAMS(TEMPLATE_PARAMS_SEQ) \
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> \
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struct class_member_proxy< \
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BOOST_FUSION_ADAPT_STRUCT_UNPACK_NAME(NAME_SEQ) \
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, I \
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> \
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{ \
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typedef BOOST_PP_TUPLE_ELEM(ATTRIBUTE_TUPEL_SIZE, 0, ATTRIBUTE) lvalue; \
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typedef BOOST_PP_TUPLE_ELEM(ATTRIBUTE_TUPEL_SIZE, 1, ATTRIBUTE) rvalue; \
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\
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class_member_proxy(BOOST_FUSION_ADAPT_STRUCT_UNPACK_NAME(NAME_SEQ)& o) \
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: obj(o) \
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{} \
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\
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template<class Arg> \
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class_member_proxy& \
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operator=(Arg const& val) \
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{ \
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BOOST_PP_TUPLE_ELEM(ATTRIBUTE_TUPEL_SIZE, 3, ATTRIBUTE); \
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return *this; \
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} \
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\
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operator lvalue() \
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{ \
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return BOOST_PP_TUPLE_ELEM(ATTRIBUTE_TUPEL_SIZE, 2, ATTRIBUTE); \
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} \
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\
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BOOST_FUSION_ADAPT_STRUCT_UNPACK_NAME(NAME_SEQ)& obj; \
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\
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private: \
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class_member_proxy& operator= (class_member_proxy const&); \
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}; \
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\
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template< \
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BOOST_FUSION_ADAPT_STRUCT_UNPACK_TEMPLATE_PARAMS(TEMPLATE_PARAMS_SEQ) \
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> \
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struct struct_member<BOOST_FUSION_ADAPT_STRUCT_UNPACK_NAME(NAME_SEQ), I> \
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{ \
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typedef BOOST_PP_TUPLE_ELEM(ATTRIBUTE_TUPEL_SIZE, 0, ATTRIBUTE) lvalue; \
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\
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typedef \
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BOOST_PP_IF( \
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BOOST_PP_SEQ_HEAD(TEMPLATE_PARAMS_SEQ), \
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BOOST_FUSION_ADAPT_CLASS_GET_IDENTITY_TEMPLATE_IMPL, \
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BOOST_FUSION_ADAPT_CLASS_GET_IDENTITY_NON_TEMPLATE_IMPL)( \
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TEMPLATE_PARAMS_SEQ) \
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type; \
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\
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template<typename Seq> \
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struct apply \
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{ \
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typedef \
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class_member_proxy< \
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BOOST_FUSION_ADAPT_STRUCT_UNPACK_NAME(NAME_SEQ) \
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, I \
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> \
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proxy; \
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\
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typedef typename \
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mpl::if_< \
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is_const<Seq> \
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, BOOST_PP_TUPLE_ELEM(ATTRIBUTE_TUPEL_SIZE, 1, ATTRIBUTE) \
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, proxy \
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>::type \
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type; \
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\
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static proxy \
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call(BOOST_FUSION_ADAPT_STRUCT_UNPACK_NAME(NAME_SEQ)& obj) \
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{ \
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return proxy(obj); \
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} \
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\
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static BOOST_PP_TUPLE_ELEM(ATTRIBUTE_TUPEL_SIZE, 1, ATTRIBUTE) \
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call(BOOST_FUSION_ADAPT_STRUCT_UNPACK_NAME(NAME_SEQ) const& obj) \
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{ \
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return BOOST_PP_TUPLE_ELEM(ATTRIBUTE_TUPEL_SIZE, 2, ATTRIBUTE); \
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} \
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}; \
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};
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#endif
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