233 lines
11 KiB
C++
233 lines
11 KiB
C++
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// Copyright David Abrahams, Daniel Wallin 2003.
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// Copyright Cromwell D. Enage 2017.
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_PARAMETER_MACROS_050412_HPP
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#define BOOST_PARAMETER_MACROS_050412_HPP
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#include <boost/parameter/config.hpp>
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#include <boost/preprocessor/repetition/enum_params.hpp>
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#if !defined(BOOST_NO_SFINAE) && \
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!BOOST_WORKAROUND(BOOST_BORLANDC, BOOST_TESTED_AT(0x592))
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#define BOOST_PARAMETER_MATCH_TYPE(n, param) \
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, typename param::match<BOOST_PP_ENUM_PARAMS(n, T)>::type kw = param()
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/**/
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#define BOOST_PARAMETER_MATCH_TYPE_Z(z, n, param) \
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, typename param::match<BOOST_PP_ENUM_PARAMS_Z(z, n, T)>::type kw = param()
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/**/
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#else // SFINAE disbled, or Borland workarounds needed.
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#define BOOST_PARAMETER_MATCH_TYPE(n, param) , param kw = param()
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/**/
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#define BOOST_PARAMETER_MATCH_TYPE_Z(z, n, param) , param kw = param()
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/**/
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#endif // SFINAE enabled, not Borland.
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#include <boost/preprocessor/control/if.hpp>
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#include <boost/preprocessor/repetition/enum_binary_params.hpp>
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#include <boost/preprocessor/tuple/elem.hpp>
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#include <boost/preprocessor/cat.hpp>
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#if defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING)
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#define BOOST_PARAMETER_FUN_0(z, n, params) \
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BOOST_PP_TUPLE_ELEM(3, 0, params) BOOST_PP_TUPLE_ELEM(3, 1, params)() \
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{ \
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return BOOST_PP_CAT( \
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BOOST_PP_TUPLE_ELEM(3, 1, params) \
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, _with_named_params \
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)(BOOST_PP_TUPLE_ELEM(3, 2, params)()()); \
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}
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/**/
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#include <utility>
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#define BOOST_PARAMETER_FUN_DECL_PARAM(z, n, p) \
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::std::forward<BOOST_PP_CAT(T, n)>(BOOST_PP_CAT(p, n))
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/**/
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#include <boost/preprocessor/repetition/enum.hpp>
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#define BOOST_PARAMETER_FUN_DEFN_1(z, n, params) \
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template <BOOST_PP_ENUM_PARAMS_Z(z, n, typename T)> \
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BOOST_PP_TUPLE_ELEM(3, 0, params) \
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BOOST_PP_TUPLE_ELEM(3, 1, params)( \
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BOOST_PP_ENUM_BINARY_PARAMS_Z(z, n, T, && p) \
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BOOST_PARAMETER_MATCH_TYPE_Z( \
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z, n, BOOST_PP_TUPLE_ELEM(3, 2, params) \
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) \
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) \
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{ \
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return BOOST_PP_CAT( \
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BOOST_PP_TUPLE_ELEM(3, 1, params) \
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, _with_named_params \
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)( \
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kw( \
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BOOST_PP_CAT(BOOST_PP_ENUM_, z)( \
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n, BOOST_PARAMETER_FUN_DECL_PARAM, p \
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) \
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) \
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); \
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}
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/**/
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#define BOOST_PARAMETER_FUN_DECL(z, n, params) \
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BOOST_PP_IF( \
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n \
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, BOOST_PARAMETER_FUN_DEFN_1 \
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, BOOST_PARAMETER_FUN_0 \
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)(z, n, params)
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/**/
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#else // !defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING)
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#define BOOST_PARAMETER_FUN_DEFN_0(z, n, params) \
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template <BOOST_PP_ENUM_PARAMS_Z(z, n, typename T)> \
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BOOST_PP_TUPLE_ELEM(3, 0, params) \
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BOOST_PP_TUPLE_ELEM(3, 1, params)( \
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BOOST_PP_ENUM_BINARY_PARAMS_Z(z, n, T, const& p) \
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BOOST_PARAMETER_MATCH_TYPE_Z( \
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z, n, BOOST_PP_TUPLE_ELEM(3, 2, params) \
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) \
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) \
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{ \
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return BOOST_PP_CAT( \
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BOOST_PP_TUPLE_ELEM(3, 1, params) \
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, _with_named_params \
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)(kw(BOOST_PP_ENUM_PARAMS_Z(z, n, p))); \
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}
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/**/
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#include <boost/preprocessor/seq/seq.hpp>
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#define BOOST_PARAMETER_FUN_0(z, n, seq) \
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BOOST_PP_TUPLE_ELEM(3, 0, BOOST_PP_SEQ_HEAD(BOOST_PP_SEQ_TAIL(seq))) \
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BOOST_PP_TUPLE_ELEM(3, 1, BOOST_PP_SEQ_HEAD(BOOST_PP_SEQ_TAIL(seq)))() \
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{ \
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return BOOST_PP_CAT( \
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BOOST_PP_TUPLE_ELEM( \
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3, 1, BOOST_PP_SEQ_HEAD(BOOST_PP_SEQ_TAIL(seq)) \
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) \
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, _with_named_params \
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)( \
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BOOST_PP_TUPLE_ELEM(3, 2, BOOST_PP_SEQ_HEAD(BOOST_PP_SEQ_TAIL(seq))) \
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()() \
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); \
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}
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/**/
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#include <boost/parameter/aux_/preprocessor/binary_seq_to_args.hpp>
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#include <boost/preprocessor/seq/size.hpp>
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#define BOOST_PARAMETER_FUN_DEFN_R(r, seq) \
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template < \
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BOOST_PP_ENUM_PARAMS( \
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BOOST_PP_SEQ_SIZE(BOOST_PP_SEQ_TAIL(seq)) \
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, typename T \
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) \
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> BOOST_PP_TUPLE_ELEM(3, 0, BOOST_PP_SEQ_HEAD(seq)) \
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BOOST_PP_TUPLE_ELEM(3, 1, BOOST_PP_SEQ_HEAD(seq))( \
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BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARGS( \
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BOOST_PP_SEQ_TAIL(seq), (T)(p) \
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) \
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BOOST_PARAMETER_MATCH_TYPE( \
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BOOST_PP_SEQ_SIZE(BOOST_PP_SEQ_TAIL(seq)) \
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, BOOST_PP_TUPLE_ELEM(3, 2, BOOST_PP_SEQ_HEAD(seq)) \
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) \
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) \
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{ \
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return BOOST_PP_CAT( \
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BOOST_PP_TUPLE_ELEM(3, 1, BOOST_PP_SEQ_HEAD(seq)) \
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, _with_named_params \
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)( \
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kw( \
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BOOST_PP_ENUM_PARAMS( \
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BOOST_PP_SEQ_SIZE(BOOST_PP_SEQ_TAIL(seq)), p \
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) \
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) \
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); \
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}
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/**/
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#include <boost/parameter/aux_/preprocessor/binary_seq_for_each.hpp>
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#include <boost/preprocessor/tuple/eat.hpp>
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#define BOOST_PARAMETER_FUN_DEFN_1(z, n, params) \
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BOOST_PP_IF( \
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n \
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, BOOST_PARAMETER_AUX_PP_BINARY_SEQ_FOR_EACH_Z \
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, BOOST_PARAMETER_FUN_0 \
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)(z, n, (BOOST_PARAMETER_FUN_DEFN_R)(params))
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/**/
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#include <boost/preprocessor/comparison/less.hpp>
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#define BOOST_PARAMETER_FUN_DECL(z, n, params) \
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BOOST_PP_CAT( \
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BOOST_PARAMETER_FUN_DEFN_ \
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, BOOST_PP_LESS( \
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n \
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, BOOST_PARAMETER_EXPONENTIAL_OVERLOAD_THRESHOLD_ARITY \
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) \
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)(z, n, params)
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/**/
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#endif // BOOST_PARAMETER_HAS_PERFECT_FORWARDING
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#include <boost/preprocessor/arithmetic/inc.hpp>
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#include <boost/preprocessor/repetition/repeat_from_to.hpp>
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// Generates:
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//
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// template <typename Params>
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// ret name ## _with_named_params(Params const&);
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//
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// template <typename T0>
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// ret name(
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// T0 && p0
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// , typename parameters::match<T0>::type kw = parameters()
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// )
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// {
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// return name ## _with_named_params(kw(p0));
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// }
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//
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// template <typename T0, ..., typename T ## N>
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// ret name(
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// T0 && p0, ..., TN && p ## N
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// , typename parameters::match<T0, ..., T ## N>::type kw = parameters()
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// )
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// {
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// return name ## _with_named_params(kw(p0, ..., p ## N));
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// }
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//
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// template <typename Params>
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// ret name ## _with_named_params(Params const&)
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//
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// lo and hi determine the min and max arities of the generated functions.
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#define BOOST_PARAMETER_MEMFUN(ret, name, lo, hi, parameters) \
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BOOST_PP_REPEAT_FROM_TO( \
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lo, BOOST_PP_INC(hi), BOOST_PARAMETER_FUN_DECL \
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, (ret, name, parameters) \
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) \
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template <typename Params> \
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ret BOOST_PP_CAT(name, _with_named_params)(Params const& p)
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/**/
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#define BOOST_PARAMETER_FUN(ret, name, lo, hi, parameters) \
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template <typename Params> \
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ret BOOST_PP_CAT(name, _with_named_params)(Params const& p); \
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BOOST_PARAMETER_MEMFUN(ret, name, lo, hi, parameters)
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/**/
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#endif // include guard
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