100 lines
4.8 KiB
C++
100 lines
4.8 KiB
C++
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// Copyright David Abrahams, Daniel Wallin 2003. Use, modification and
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// distribution is subject to 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/preprocessor/tuple/elem.hpp>
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#include <boost/preprocessor/repetition/repeat_from_to.hpp>
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#include <boost/preprocessor/arithmetic/inc.hpp>
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#include <boost/preprocessor/logical/bool.hpp>
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#include <boost/preprocessor/punctuation/comma_if.hpp>
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#include <boost/preprocessor/control/expr_if.hpp>
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#include <boost/preprocessor/repetition/enum_params.hpp>
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#include <boost/preprocessor/repetition/enum_binary_params.hpp>
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#include <boost/preprocessor/cat.hpp>
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#include <boost/detail/workaround.hpp>
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#define BOOST_PARAMETER_FUN_TEMPLATE_HEAD1(n) \
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template<BOOST_PP_ENUM_PARAMS(n, class T)>
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#define BOOST_PARAMETER_FUN_TEMPLATE_HEAD0(n)
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#if ! defined(BOOST_NO_SFINAE) && ! BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x592))
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# define BOOST_PARAMETER_MATCH_TYPE(n, param) \
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BOOST_PP_EXPR_IF(n, typename) param::match \
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< \
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BOOST_PP_ENUM_PARAMS(n, T) \
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>::type
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#else
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# define BOOST_PARAMETER_MATCH_TYPE(n, param) param
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#endif
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#define BOOST_PARAMETER_FUN_DECL(z, n, params) \
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\
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BOOST_PP_CAT(BOOST_PARAMETER_FUN_TEMPLATE_HEAD, BOOST_PP_BOOL(n))(n) \
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\
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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(n, T, const& p) \
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BOOST_PP_COMMA_IF(n) \
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BOOST_PARAMETER_MATCH_TYPE(n,BOOST_PP_TUPLE_ELEM(3, 2, params)) \
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kw = BOOST_PP_TUPLE_ELEM(3, 2, params)() \
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) \
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{ \
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return BOOST_PP_CAT(BOOST_PP_TUPLE_ELEM(3, 1, params), _with_named_params)( \
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kw(BOOST_PP_ENUM_PARAMS(n, p)) \
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); \
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}
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// Generates:
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//
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// template<class Params>
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// ret name ## _with_named_params(Params const&);
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//
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// template<class T0>
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// ret name(T0 const& p0, typename parameters::match<T0>::type kw = parameters())
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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<class T0, ..., class TN>
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// ret name(T0 const& p0, ..., TN const& PN
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// , typename parameters::match<T0, ..., TN>::type kw = parameters())
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// {
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// return name ## _with_named_params(kw(p0, ..., pN));
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// }
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//
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// template<class Params>
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// ret name ## _with_named_params(Params const&)
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//
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// lo and hi determines the min and max arity of the generated functions.
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#define BOOST_PARAMETER_FUN(ret, name, lo, hi, parameters) \
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\
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template<class Params> \
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ret BOOST_PP_CAT(name, _with_named_params)(Params const& p); \
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\
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BOOST_PP_REPEAT_FROM_TO( \
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lo, BOOST_PP_INC(hi), BOOST_PARAMETER_FUN_DECL, (ret, name, parameters)) \
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\
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template<class Params> \
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ret BOOST_PP_CAT(name, _with_named_params)(Params const& p)
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#define BOOST_PARAMETER_MEMFUN(ret, name, lo, hi, parameters) \
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\
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BOOST_PP_REPEAT_FROM_TO( \
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lo, BOOST_PP_INC(hi), BOOST_PARAMETER_FUN_DECL, (ret, name, parameters)) \
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\
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template<class Params> \
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ret BOOST_PP_CAT(name, _with_named_params)(Params const& p)
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#endif // BOOST_PARAMETER_MACROS_050412_HPP
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