// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com) | |
// (C) Copyright 2003-2007 Jonathan Turkanis | |
// Distributed under the Boost Software License, Version 1.0. (See accompanying | |
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.) | |
// See http://www.boost.org/libs/iostreams for documentation. | |
#ifndef BOOST_IOSTREAMS_DETAIL_FORWARD_HPP_INCLUDED | |
#define BOOST_IOSTREAMS_DETAIL_FORWARD_HPP_INCLUDED | |
#if defined(_MSC_VER) && (_MSC_VER >= 1020) | |
# pragma once | |
#endif | |
#include <boost/config.hpp> // BOOST_MSVC, BOOST_NO_SFINAE | |
#include <boost/detail/workaround.hpp> | |
#include <boost/iostreams/detail/config/limits.hpp> | |
#include <boost/iostreams/detail/push_params.hpp> | |
#include <boost/preprocessor/arithmetic/dec.hpp> | |
#include <boost/preprocessor/arithmetic/inc.hpp> | |
#include <boost/preprocessor/punctuation/comma_if.hpp> | |
#include <boost/preprocessor/repetition/enum_binary_params.hpp> | |
#include <boost/preprocessor/repetition/enum_params.hpp> | |
#include <boost/preprocessor/repetition/repeat_from_to.hpp> | |
#include <boost/preprocessor/tuple/elem.hpp> | |
#include <boost/type_traits/is_same.hpp> | |
//------Macros for defining forwarding constructors and open overloads--------// | |
// | |
// Macro: BOOST_IOSTREAMS_FORWARD(class, impl, device, params, args) | |
// Description: Defines constructors and overloads of 'open' which construct | |
// a device using the specified argument list and pass it to the specified | |
// helper function | |
// class - The class name | |
// impl - The helper function | |
// device - The device type | |
// params - The list of formal parameters trailing the device parameter in | |
// the helper function's signature | |
// params - The list of arguments passed to the helper function, following the | |
// device argument | |
// | |
#define BOOST_IOSTREAMS_FORWARD(class, impl, device, params, args) \ | |
class(const device& t params()) \ | |
{ this->impl(::boost::iostreams::detail::wrap(t) args()); } \ | |
class(device& t params()) \ | |
{ this->impl(::boost::iostreams::detail::wrap(t) args()); } \ | |
class(const ::boost::reference_wrapper<device>& ref params()) \ | |
{ this->impl(ref args()); } \ | |
void open(const device& t params()) \ | |
{ this->impl(::boost::iostreams::detail::wrap(t) args()); } \ | |
void open(device& t params()) \ | |
{ this->impl(::boost::iostreams::detail::wrap(t) args()); } \ | |
void open(const ::boost::reference_wrapper<device>& ref params()) \ | |
{ this->impl(ref args()); } \ | |
BOOST_PP_REPEAT_FROM_TO( \ | |
1, BOOST_PP_INC(BOOST_IOSTREAMS_MAX_FORWARDING_ARITY), \ | |
BOOST_IOSTREAMS_FORWARDING_CTOR, (class, impl, device) \ | |
) \ | |
BOOST_PP_REPEAT_FROM_TO( \ | |
1, BOOST_PP_INC(BOOST_IOSTREAMS_MAX_FORWARDING_ARITY), \ | |
BOOST_IOSTREAMS_FORWARDING_FN, (class, impl, device) \ | |
) \ | |
/**/ | |
#if !BOOST_WORKAROUND(BOOST_MSVC, < 1300) | |
# define BOOST_IOSTREAMS_FORWARDING_CTOR_I(z, n, tuple) \ | |
template< typename U100 BOOST_PP_COMMA_IF(BOOST_PP_DEC(n)) \ | |
BOOST_PP_ENUM_PARAMS_Z(z, BOOST_PP_DEC(n), typename U) > \ | |
BOOST_PP_TUPLE_ELEM(3, 0, tuple) \ | |
( U100& u100 BOOST_PP_COMMA_IF(BOOST_PP_DEC(n)) \ | |
BOOST_PP_ENUM_BINARY_PARAMS_Z(z, BOOST_PP_DEC(n), const U, &u) \ | |
BOOST_IOSTREAMS_DISABLE_IF_SAME(U100, BOOST_PP_TUPLE_ELEM(3, 2, tuple))) \ | |
{ this->BOOST_PP_TUPLE_ELEM(3, 1, tuple) \ | |
( BOOST_PP_TUPLE_ELEM(3, 2, tuple) \ | |
( u100 BOOST_PP_COMMA_IF(BOOST_PP_DEC(n)) \ | |
BOOST_PP_ENUM_PARAMS_Z(z, BOOST_PP_DEC(n), u)) ); } \ | |
/**/ | |
# define BOOST_IOSTREAMS_FORWARDING_FN_I(z, n, tuple) \ | |
template< typename U100 BOOST_PP_COMMA_IF(BOOST_PP_DEC(n)) \ | |
BOOST_PP_ENUM_PARAMS_Z(z, BOOST_PP_DEC(n), typename U) > \ | |
void open \ | |
( U100& u100 BOOST_PP_COMMA_IF(BOOST_PP_DEC(n)) \ | |
BOOST_PP_ENUM_BINARY_PARAMS_Z(z, BOOST_PP_DEC(n), const U, &u) \ | |
BOOST_IOSTREAMS_DISABLE_IF_SAME(U100, BOOST_PP_TUPLE_ELEM(3, 2, tuple))) \ | |
{ this->BOOST_PP_TUPLE_ELEM(3, 1, tuple) \ | |
( u100 BOOST_PP_COMMA_IF(BOOST_PP_DEC(n)) \ | |
BOOST_PP_ENUM_PARAMS_Z(z, BOOST_PP_DEC(n), u) ); } \ | |
/**/ | |
#else | |
# define BOOST_IOSTREAMS_FORWARDING_CTOR_I(z, n, tuple) | |
# define BOOST_IOSTREAMS_FORWARDING_FN_I(z, n, tuple) | |
#endif | |
#define BOOST_IOSTREAMS_FORWARDING_CTOR(z, n, tuple) \ | |
template<BOOST_PP_ENUM_PARAMS_Z(z, n, typename U)> \ | |
BOOST_PP_TUPLE_ELEM(3, 0, tuple) \ | |
(BOOST_PP_ENUM_BINARY_PARAMS_Z(z, n, const U, &u) \ | |
BOOST_IOSTREAMS_DISABLE_IF_SAME(U0, BOOST_PP_TUPLE_ELEM(3, 2, tuple))) \ | |
{ this->BOOST_PP_TUPLE_ELEM(3, 1, tuple) \ | |
( BOOST_PP_TUPLE_ELEM(3, 2, tuple) \ | |
(BOOST_PP_ENUM_PARAMS_Z(z, n, u)) ); } \ | |
BOOST_IOSTREAMS_FORWARDING_CTOR_I(z, n, tuple) \ | |
/**/ | |
#define BOOST_IOSTREAMS_FORWARDING_FN(z, n, tuple) \ | |
template<BOOST_PP_ENUM_PARAMS_Z(z, n, typename U)> \ | |
void open(BOOST_PP_ENUM_BINARY_PARAMS_Z(z, n, const U, &u) \ | |
BOOST_IOSTREAMS_DISABLE_IF_SAME(U0, BOOST_PP_TUPLE_ELEM(3, 2, tuple))) \ | |
{ this->BOOST_PP_TUPLE_ELEM(3, 1, tuple) \ | |
( BOOST_PP_TUPLE_ELEM(3, 2, tuple) \ | |
(BOOST_PP_ENUM_PARAMS_Z(z, n, u)) ); } \ | |
BOOST_IOSTREAMS_FORWARDING_FN_I(z, n, tuple) \ | |
/**/ | |
// Disable forwarding constructors if first parameter type is the same | |
// as the device type | |
#if !defined(BOOST_NO_SFINAE) && \ | |
!BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x592)) | |
# define BOOST_IOSTREAMS_DISABLE_IF_SAME(device, param) \ | |
, typename boost::disable_if< boost::is_same<device, param> >::type* = 0 \ | |
/**/ | |
#else | |
# define BOOST_IOSTREAMS_DISABLE_IF_SAME(device, param) | |
#endif | |
#endif // #ifndef BOOST_IOSTREAMS_DETAIL_FORWARD_HPP_INCLUDED |