161 lines
6.2 KiB
Plaintext
161 lines
6.2 KiB
Plaintext
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// Copyright (C) 2004 Arkadiy Vertleyb
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// Copyright (C) 2005 Peder Holt
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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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#ifndef BOOST_TYPEOF_TEMPLATE_ENCODING_HPP_INCLUDED
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#define BOOST_TYPEOF_TEMPLATE_ENCODING_HPP_INCLUDED
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#include <boost/preprocessor/cat.hpp>
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#include <boost/preprocessor/repetition/enum_trailing.hpp>
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#include <boost/preprocessor/control/iif.hpp>
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#include <boost/preprocessor/detail/is_unary.hpp>
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#include <boost/preprocessor/repetition/repeat.hpp>
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#include <boost/preprocessor/tuple/eat.hpp>
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#include <boost/preprocessor/seq/transform.hpp>
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#include <boost/preprocessor/seq/for_each_i.hpp>
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#include <boost/preprocessor/seq/cat.hpp>
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#include <boost/typeof/encode_decode.hpp>
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#include <boost/typeof/int_encoding.hpp>
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#include <boost/typeof/type_template_param.hpp>
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#include <boost/typeof/integral_template_param.hpp>
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#include <boost/typeof/template_template_param.hpp>
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#ifdef __BORLANDC__
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#define BOOST_TYPEOF_QUALIFY(P) self_t::P
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#else
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#define BOOST_TYPEOF_QUALIFY(P) P
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#endif
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// The template parameter description, entered by the user,
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// is converted into a polymorphic "object"
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// that is used to generate the code responsible for
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// encoding/decoding the parameter, etc.
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// make sure to cat the sequence first, and only then add the prefix.
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#define BOOST_TYPEOF_MAKE_OBJ(elem) BOOST_PP_CAT(\
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BOOST_TYPEOF_MAKE_OBJ,\
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BOOST_PP_SEQ_CAT((_) BOOST_TYPEOF_TO_SEQ(elem))\
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)
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#define BOOST_TYPEOF_TO_SEQ(tokens) BOOST_TYPEOF_ ## tokens ## _BOOST_TYPEOF
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// BOOST_TYPEOF_REGISTER_TEMPLATE
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#define BOOST_TYPEOF_REGISTER_TEMPLATE_EXPLICIT_ID(Name, Params, Id)\
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BOOST_TYPEOF_REGISTER_TEMPLATE_IMPL(\
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Name,\
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BOOST_TYPEOF_MAKE_OBJS(BOOST_TYPEOF_TOSEQ(Params)),\
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BOOST_PP_SEQ_SIZE(BOOST_TYPEOF_TOSEQ(Params)),\
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Id)
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#define BOOST_TYPEOF_REGISTER_TEMPLATE(Name, Params)\
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BOOST_TYPEOF_REGISTER_TEMPLATE_EXPLICIT_ID(Name, Params, BOOST_TYPEOF_UNIQUE_ID())
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#define BOOST_TYPEOF_OBJECT_MAKER(s, data, elem)\
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BOOST_TYPEOF_MAKE_OBJ(elem)
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#define BOOST_TYPEOF_MAKE_OBJS(Params)\
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BOOST_PP_SEQ_TRANSFORM(BOOST_TYPEOF_OBJECT_MAKER, ~, Params)
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// As suggested by Paul Mensonides:
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#define BOOST_TYPEOF_TOSEQ(x)\
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BOOST_PP_IIF(\
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BOOST_PP_IS_UNARY(x),\
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x BOOST_PP_TUPLE_EAT(3), BOOST_PP_REPEAT\
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)(x, BOOST_TYPEOF_TOSEQ_2, ~)
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#define BOOST_TYPEOF_TOSEQ_2(z, n, _) (class)
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// BOOST_TYPEOF_VIRTUAL
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#define BOOST_TYPEOF_CAT_4(a, b, c, d) BOOST_TYPEOF_CAT_4_I(a, b, c, d)
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#define BOOST_TYPEOF_CAT_4_I(a, b, c, d) a ## b ## c ## d
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#define BOOST_TYPEOF_VIRTUAL(Fun, Obj)\
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BOOST_TYPEOF_CAT_4(BOOST_TYPEOF_, BOOST_PP_SEQ_HEAD(Obj), _, Fun)
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// BOOST_TYPEOF_SEQ_ENUM[_TRAILING][_1]
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// Two versions provided due to reentrancy issue
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#define BOOST_TYPEOF_SEQ_EXPAND_ELEMENT(z,n,seq)\
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BOOST_PP_SEQ_ELEM(0,seq) (z,n,BOOST_PP_SEQ_ELEM(n,BOOST_PP_SEQ_ELEM(1,seq)))
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#define BOOST_TYPEOF_SEQ_ENUM(seq,macro)\
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BOOST_PP_ENUM(BOOST_PP_SEQ_SIZE(seq),BOOST_TYPEOF_SEQ_EXPAND_ELEMENT,(macro)(seq))
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#define BOOST_TYPEOF_SEQ_ENUM_TRAILING(seq,macro)\
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BOOST_PP_ENUM_TRAILING(BOOST_PP_SEQ_SIZE(seq),BOOST_TYPEOF_SEQ_EXPAND_ELEMENT,(macro)(seq))
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#define BOOST_TYPEOF_SEQ_EXPAND_ELEMENT_1(z,n,seq)\
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BOOST_PP_SEQ_ELEM(0,seq) (z,n,BOOST_PP_SEQ_ELEM(n,BOOST_PP_SEQ_ELEM(1,seq)))
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#define BOOST_TYPEOF_SEQ_ENUM_1(seq,macro)\
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BOOST_PP_ENUM(BOOST_PP_SEQ_SIZE(seq),BOOST_TYPEOF_SEQ_EXPAND_ELEMENT_1,(macro)(seq))
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#define BOOST_TYPEOF_SEQ_ENUM_TRAILING_1(seq,macro)\
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BOOST_PP_ENUM_TRAILING(BOOST_PP_SEQ_SIZE(seq),BOOST_TYPEOF_SEQ_EXPAND_ELEMENT_1,(macro)(seq))
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//
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#define BOOST_TYPEOF_PLACEHOLDER(z, n, elem)\
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BOOST_TYPEOF_VIRTUAL(PLACEHOLDER, elem)(elem)
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#define BOOST_TYPEOF_PLACEHOLDER_TYPES(z, n, elem)\
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BOOST_TYPEOF_VIRTUAL(PLACEHOLDER_TYPES, elem)(elem, n)
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#define BOOST_TYPEOF_REGISTER_TEMPLATE_ENCODE_PARAM(r, data, n, elem)\
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BOOST_TYPEOF_VIRTUAL(ENCODE, elem)(elem, n)
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#define BOOST_TYPEOF_REGISTER_TEMPLATE_DECODE_PARAM(r, data, n, elem)\
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BOOST_TYPEOF_VIRTUAL(DECODE, elem)(elem, n)
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#define BOOST_TYPEOF_REGISTER_TEMPLATE_PARAM_PAIR(z, n, elem) \
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BOOST_TYPEOF_VIRTUAL(EXPANDTYPE, elem)(elem) BOOST_PP_CAT(P, n)
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#define BOOST_TYPEOF_REGISTER_DEFAULT_TEMPLATE_TYPE(Name,Params,ID)\
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Name< BOOST_PP_ENUM_PARAMS(BOOST_PP_SEQ_SIZE(Params), P) >
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//Since we are creating an internal decode struct, we need to use different template names, T instead of P.
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#define BOOST_TYPEOF_REGISTER_DECODER_TYPE_PARAM_PAIR(z,n,elem) \
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BOOST_TYPEOF_VIRTUAL(EXPANDTYPE, elem)(elem) BOOST_PP_CAT(T, n)
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//Default template param decoding
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#define BOOST_TYPEOF_TYPEDEF_DECODED_TEMPLATE_TYPE(Name,Params)\
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typedef Name<BOOST_PP_ENUM_PARAMS(BOOST_PP_SEQ_SIZE(Params),BOOST_TYPEOF_QUALIFY(P))> type;
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//Branch the decoding
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#define BOOST_TYPEOF_TYPEDEF_DECODED_TYPE(Name,Params)\
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BOOST_PP_IF(BOOST_TYPEOF_HAS_TEMPLATES(Params),\
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BOOST_TYPEOF_TYPEDEF_DECODED_TEMPLATE_TEMPLATE_TYPE,\
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BOOST_TYPEOF_TYPEDEF_DECODED_TEMPLATE_TYPE)(Name,Params)
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#define BOOST_TYPEOF_REGISTER_TEMPLATE_IMPL(Name, Params, Size, ID)\
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BOOST_TYPEOF_BEGIN_ENCODE_NS\
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BOOST_TYPEOF_REGISTER_TEMPLATE_TEMPLATE_IMPL(Name, Params, ID)\
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template<class V\
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BOOST_TYPEOF_SEQ_ENUM_TRAILING(Params, BOOST_TYPEOF_REGISTER_TEMPLATE_PARAM_PAIR)\
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>\
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struct encode_type_impl<V, Name<BOOST_PP_ENUM_PARAMS(Size, P)> >\
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{\
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typedef typename boost::type_of::push_back<V, boost::mpl::size_t<ID> >::type V0;\
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BOOST_PP_SEQ_FOR_EACH_I(BOOST_TYPEOF_REGISTER_TEMPLATE_ENCODE_PARAM, ~, Params)\
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typedef BOOST_PP_CAT(V, Size) type;\
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};\
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template<class Iter>\
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struct decode_type_impl<boost::mpl::size_t<ID>, Iter>\
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{\
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typedef decode_type_impl<boost::mpl::size_t<ID>, Iter> self_t;\
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typedef boost::mpl::size_t<ID> self_id;\
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typedef Iter iter0;\
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BOOST_PP_SEQ_FOR_EACH_I(BOOST_TYPEOF_REGISTER_TEMPLATE_DECODE_PARAM, ~, Params)\
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BOOST_TYPEOF_TYPEDEF_DECODED_TYPE(Name, Params)\
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typedef BOOST_PP_CAT(iter, Size) iter;\
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};\
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BOOST_TYPEOF_END_ENCODE_NS
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#endif//BOOST_TYPEOF_TEMPLATE_ENCODING_HPP_INCLUDED
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