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114 lines
5.1 KiB
114 lines
5.1 KiB
// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
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// (C) Copyright 2003-2007 Jonathan Turkanis
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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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// See http://www.boost.org/libs/iostreams for documentation.
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#ifndef BOOST_IOSTREAMS_DETAIL_FORWARD_HPP_INCLUDED
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#define BOOST_IOSTREAMS_DETAIL_FORWARD_HPP_INCLUDED
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#if defined(_MSC_VER)
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# pragma once
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#endif
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#include <boost/config.hpp> // BOOST_MSVC, BOOST_NO_SFINAE
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#include <boost/detail/workaround.hpp>
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#include <boost/iostreams/detail/config/limits.hpp>
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#include <boost/iostreams/detail/push_params.hpp>
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#include <boost/preprocessor/arithmetic/dec.hpp>
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#include <boost/preprocessor/arithmetic/inc.hpp>
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#include <boost/preprocessor/punctuation/comma_if.hpp>
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#include <boost/preprocessor/repetition/enum_binary_params.hpp>
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#include <boost/preprocessor/repetition/enum_params.hpp>
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#include <boost/preprocessor/repetition/repeat_from_to.hpp>
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#include <boost/preprocessor/tuple/elem.hpp>
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#include <boost/type_traits/is_same.hpp>
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//------Macros for defining forwarding constructors and open overloads--------//
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//
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// Macro: BOOST_IOSTREAMS_FORWARD(class, impl, device, params, args)
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// Description: Defines constructors and overloads of 'open' which construct
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// a device using the specified argument list and pass it to the specified
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// helper function
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// class - The class name
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// impl - The helper function
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// device - The device type
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// params - The list of formal parameters trailing the device parameter in
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// the helper function's signature
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// params - The list of arguments passed to the helper function, following the
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// device argument
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//
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#define BOOST_IOSTREAMS_FORWARD(class, impl, device, params, args) \
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class(const device& t params()) \
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{ this->impl(::boost::iostreams::detail::wrap(t) args()); } \
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class(device& t params()) \
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{ this->impl(::boost::iostreams::detail::wrap(t) args()); } \
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class(const ::boost::reference_wrapper<device>& ref params()) \
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{ this->impl(ref args()); } \
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void open(const device& t params()) \
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{ this->impl(::boost::iostreams::detail::wrap(t) args()); } \
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void open(device& t params()) \
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{ this->impl(::boost::iostreams::detail::wrap(t) args()); } \
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void open(const ::boost::reference_wrapper<device>& ref params()) \
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{ this->impl(ref args()); } \
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BOOST_PP_REPEAT_FROM_TO( \
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1, BOOST_PP_INC(BOOST_IOSTREAMS_MAX_FORWARDING_ARITY), \
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BOOST_IOSTREAMS_FORWARDING_CTOR, (class, impl, device) \
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) \
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BOOST_PP_REPEAT_FROM_TO( \
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1, BOOST_PP_INC(BOOST_IOSTREAMS_MAX_FORWARDING_ARITY), \
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BOOST_IOSTREAMS_FORWARDING_FN, (class, impl, device) \
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) \
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/**/
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#define BOOST_IOSTREAMS_FORWARDING_CTOR(z, n, tuple) \
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template<BOOST_PP_ENUM_PARAMS_Z(z, n, typename U)> \
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BOOST_PP_TUPLE_ELEM(3, 0, tuple) \
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(BOOST_PP_ENUM_BINARY_PARAMS_Z(z, n, const U, &u) \
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BOOST_IOSTREAMS_DISABLE_IF_SAME(U0, BOOST_PP_TUPLE_ELEM(3, 2, tuple))) \
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{ this->BOOST_PP_TUPLE_ELEM(3, 1, tuple) \
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( BOOST_PP_TUPLE_ELEM(3, 2, tuple) \
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(BOOST_PP_ENUM_PARAMS_Z(z, n, u)) ); } \
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template< typename U100 BOOST_PP_COMMA_IF(BOOST_PP_DEC(n)) \
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BOOST_PP_ENUM_PARAMS_Z(z, BOOST_PP_DEC(n), typename U) > \
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BOOST_PP_TUPLE_ELEM(3, 0, tuple) \
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( U100& u100 BOOST_PP_COMMA_IF(BOOST_PP_DEC(n)) \
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BOOST_PP_ENUM_BINARY_PARAMS_Z(z, BOOST_PP_DEC(n), const U, &u) \
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BOOST_IOSTREAMS_DISABLE_IF_SAME(U100, BOOST_PP_TUPLE_ELEM(3, 2, tuple))) \
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{ this->BOOST_PP_TUPLE_ELEM(3, 1, tuple) \
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( BOOST_PP_TUPLE_ELEM(3, 2, tuple) \
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( u100 BOOST_PP_COMMA_IF(BOOST_PP_DEC(n)) \
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BOOST_PP_ENUM_PARAMS_Z(z, BOOST_PP_DEC(n), u)) ); } \
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/**/
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#define BOOST_IOSTREAMS_FORWARDING_FN(z, n, tuple) \
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template<BOOST_PP_ENUM_PARAMS_Z(z, n, typename U)> \
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void open(BOOST_PP_ENUM_BINARY_PARAMS_Z(z, n, const U, &u) \
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BOOST_IOSTREAMS_DISABLE_IF_SAME(U0, BOOST_PP_TUPLE_ELEM(3, 2, tuple))) \
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{ this->BOOST_PP_TUPLE_ELEM(3, 1, tuple) \
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( BOOST_PP_TUPLE_ELEM(3, 2, tuple) \
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(BOOST_PP_ENUM_PARAMS_Z(z, n, u)) ); } \
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template< typename U100 BOOST_PP_COMMA_IF(BOOST_PP_DEC(n)) \
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BOOST_PP_ENUM_PARAMS_Z(z, BOOST_PP_DEC(n), typename U) > \
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void open \
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( U100& u100 BOOST_PP_COMMA_IF(BOOST_PP_DEC(n)) \
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BOOST_PP_ENUM_BINARY_PARAMS_Z(z, BOOST_PP_DEC(n), const U, &u) \
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BOOST_IOSTREAMS_DISABLE_IF_SAME(U100, BOOST_PP_TUPLE_ELEM(3, 2, tuple))) \
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{ this->BOOST_PP_TUPLE_ELEM(3, 1, tuple) \
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( u100 BOOST_PP_COMMA_IF(BOOST_PP_DEC(n)) \
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BOOST_PP_ENUM_PARAMS_Z(z, BOOST_PP_DEC(n), u) ); } \
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/**/
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// Disable forwarding constructors if first parameter type is the same
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// as the device type
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#if !defined(BOOST_NO_SFINAE) && \
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!BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x592))
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# define BOOST_IOSTREAMS_DISABLE_IF_SAME(device, param) \
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, typename boost::disable_if< boost::is_same<device, param> >::type* = 0 \
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/**/
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#else
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# define BOOST_IOSTREAMS_DISABLE_IF_SAME(device, param)
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#endif
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#endif // #ifndef BOOST_IOSTREAMS_DETAIL_FORWARD_HPP_INCLUDED
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