Ugly, not-to-be-pushed sucking in of all of Boost to get windows to work.
[dyninst.git] / external / boost / iostreams / detail / resolve.hpp
1 // (C) Copyright Jonathan Turkanis 2003.
2 // Distributed under the Boost Software License, Version 1.0. (See accompanying
3 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
4
5 // See http://www.boost.org/libs/iostreams for documentation.
6
7 #ifndef BOOST_IOSTREAMS_DETAIL_RESOLVE_HPP_INCLUDED
8 #define BOOST_IOSTREAMS_DETAIL_RESOLVE_HPP_INCLUDED
9
10 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
11 # pragma once
12 #endif              
13
14 #include <boost/config.hpp> // partial spec, put size_t in std.
15 #include <cstddef>          // std::size_t.
16 #include <boost/detail/is_incrementable.hpp>
17 #include <boost/detail/workaround.hpp>
18 #include <boost/iostreams/detail/adapter/mode_adapter.hpp>
19 #include <boost/iostreams/detail/adapter/output_iterator_adapter.hpp>
20 #include <boost/iostreams/detail/adapter/range_adapter.hpp>
21 #include <boost/iostreams/detail/config/gcc.hpp>
22 #include <boost/iostreams/detail/config/overload_resolution.hpp>
23 #include <boost/iostreams/detail/config/wide_streams.hpp>
24 #include <boost/iostreams/detail/enable_if_stream.hpp>
25 #include <boost/iostreams/detail/is_dereferenceable.hpp>
26 #include <boost/iostreams/detail/is_iterator_range.hpp>
27 #include <boost/iostreams/detail/select.hpp>
28 #include <boost/iostreams/detail/wrap_unwrap.hpp>
29 #include <boost/iostreams/device/array.hpp>
30 #include <boost/iostreams/traits.hpp>
31 #include <boost/mpl/and.hpp>
32 #include <boost/mpl/bool.hpp> // true_.
33 #include <boost/mpl/if.hpp>
34 #include <boost/range/iterator_range.hpp>
35 #include <boost/type_traits/is_array.hpp>
36
37 // Must come last.
38 #include <boost/iostreams/detail/config/disable_warnings.hpp> // VC7.1 C4224.
39
40 namespace boost { namespace iostreams { namespace detail {
41
42 //------------------Definition of resolve-------------------------------------//
43
44 #ifndef BOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION //-------------------------//
45
46 template<typename Mode, typename Ch, typename T>
47 struct resolve_traits {
48     typedef typename 
49             mpl::if_<
50                 boost::detail::is_incrementable<T>,
51                 output_iterator_adapter<Mode, Ch, T>,
52                 const T&
53             >::type type;
54 };
55
56 # ifndef BOOST_IOSTREAMS_NO_STREAM_TEMPLATES //-------------------------------//
57
58 template<typename Mode, typename Ch, typename T>
59 typename resolve_traits<Mode, Ch, T>::type
60 resolve( const T& t 
61          BOOST_IOSTREAMS_DISABLE_IF_STREAM(T)
62
63          // I suspect that the compilers which require this workaround may
64          // be correct, but I'm not sure why :(
65          #if BOOST_WORKAROUND(BOOST_INTEL_CXX_VERSION, BOOST_TESTED_AT(810)) ||\
66              BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3205)) || \
67              BOOST_WORKAROUND(BOOST_IOSTREAMS_GCC, BOOST_TESTED_AT(400)) \
68              /**/
69          , typename disable_if< is_iterator_range<T> >::type* = 0
70          #endif
71          )
72 {
73     typedef typename resolve_traits<Mode, Ch, T>::type return_type;
74     return return_type(t);
75 }
76
77 template<typename Mode, typename Ch, typename Tr>
78 mode_adapter< Mode, std::basic_streambuf<Ch, Tr> > 
79 resolve(std::basic_streambuf<Ch, Tr>& sb)
80 { return mode_adapter< Mode, std::basic_streambuf<Ch, Tr> >(wrap(sb)); }
81
82 template<typename Mode, typename Ch, typename Tr>
83 mode_adapter< Mode, std::basic_istream<Ch, Tr> > 
84 resolve(std::basic_istream<Ch, Tr>& is)
85 { return mode_adapter< Mode, std::basic_istream<Ch, Tr> >(wrap(is)); }
86
87 template<typename Mode, typename Ch, typename Tr>
88 mode_adapter< Mode, std::basic_ostream<Ch, Tr> > 
89 resolve(std::basic_ostream<Ch, Tr>& os)
90 { return mode_adapter< Mode, std::basic_ostream<Ch, Tr> >(wrap(os)); }
91
92 template<typename Mode, typename Ch, typename Tr>
93 mode_adapter< Mode, std::basic_iostream<Ch, Tr> > 
94 resolve(std::basic_iostream<Ch, Tr>& io)
95 { return mode_adapter< Mode, std::basic_iostream<Ch, Tr> >(wrap(io)); }
96
97 template<typename Mode, typename Ch, std::size_t N>
98 array_adapter<Mode, Ch> resolve(Ch (&array)[N])
99 { return array_adapter<Mode, Ch>(array); }
100
101 template<typename Mode, typename Ch, typename Iter>
102 range_adapter< Mode, boost::iterator_range<Iter> > 
103 resolve(const boost::iterator_range<Iter>& rng)
104 { return range_adapter< Mode, boost::iterator_range<Iter> >(rng); }
105
106 # else // # ifndef BOOST_IOSTREAMS_NO_STREAM_TEMPLATES //---------------------//
107
108 template<typename Mode, typename Ch, typename T>
109 typename resolve_traits<Mode, Ch, T>::type
110 resolve( const T& t 
111          BOOST_IOSTREAMS_DISABLE_IF_STREAM(T)
112          #if defined(__GNUC__)
113          , typename disable_if< is_iterator_range<T> >::type* = 0
114          #endif
115          )
116 {
117     typedef typename resolve_traits<Mode, Ch, T>::type return_type;
118     return return_type(t);
119 }
120
121 template<typename Mode, typename Ch>
122 mode_adapter<Mode, std::streambuf> 
123 resolve(std::streambuf& sb) 
124 { return mode_adapter<Mode, std::streambuf>(wrap(sb)); }
125
126 template<typename Mode, typename Ch>
127 mode_adapter<Mode, std::istream> 
128 resolve(std::istream& is)
129 { return mode_adapter<Mode, std::istream>(wrap(is)); }
130
131 template<typename Mode, typename Ch>
132 mode_adapter<Mode, std::ostream> 
133 resolve(std::ostream& os)
134 { return mode_adapter<Mode, std::ostream>(wrap(os)); }
135
136 template<typename Mode, typename Ch>
137 mode_adapter<Mode, std::iostream> 
138 resolve(std::iostream& io)
139 { return mode_adapter<Mode, std::iostream>(wrap(io)); }
140
141 template<typename Mode, typename Ch, std::size_t N>
142 array_adapter<Mode, Ch> resolve(Ch (&array)[N])
143 { return array_adapter<Mode, Ch>(array); }
144
145 template<typename Mode, typename Ch, typename Iter>
146 range_adapter< Mode, boost::iterator_range<Iter> > 
147 resolve(const boost::iterator_range<Iter>& rng)
148 { return range_adapter< Mode, boost::iterator_range<Iter> >(rng); }
149
150 # endif // # ifndef BOOST_IOSTREAMS_NO_STREAM_TEMPLATES //--------------------//
151 #else // #ifndef BOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION //----------------//
152
153 template<typename Mode, typename Ch, typename T>
154 struct resolve_traits {
155     // Note: test for is_iterator_range must come before test for output
156     // iterator.
157     typedef typename 
158             iostreams::select<  // Disambiguation for Tru64.
159                 is_std_io<T>,
160                 mode_adapter<Mode, T>,
161                 is_iterator_range<T>,
162                 range_adapter<Mode, T>,
163                 is_dereferenceable<T>,
164                 output_iterator_adapter<Mode, Ch, T>,
165                 is_array<T>,
166                 array_adapter<Mode, T>,
167                 else_,
168                 #if !BOOST_WORKAROUND(__BORLANDC__, < 0x600)
169                     const T&
170                 #else
171                     T
172                 #endif
173             >::type type;
174 };
175
176 template<typename Mode, typename Ch, typename T>
177 typename resolve_traits<Mode, Ch, T>::type 
178 resolve(const T& t, mpl::true_)
179 {   // Bad overload resolution.
180     typedef typename resolve_traits<Mode, Ch, T>::type return_type;
181     return return_type(wrap(const_cast<T&>(t)));
182 }
183
184 template<typename Mode, typename Ch, typename T>
185 typename resolve_traits<Mode, Ch, T>::type 
186 resolve(const T& t, mpl::false_)
187
188     typedef typename resolve_traits<Mode, Ch, T>::type return_type;
189     return return_type(t);
190 }
191
192 template<typename Mode, typename Ch, typename T>
193 typename resolve_traits<Mode, Ch, T>::type 
194 resolve(const T& t BOOST_IOSTREAMS_DISABLE_IF_STREAM(T))
195 { return resolve<Mode, Ch>(t, is_std_io<T>()); }
196
197 # if !BOOST_WORKAROUND(__BORLANDC__, < 0x600) && \
198      !BOOST_WORKAROUND(BOOST_MSVC, <= 1300) && \
199      !defined(__GNUC__) // ---------------------------------------------------//
200
201 template<typename Mode, typename Ch, typename T>
202 typename resolve_traits<Mode, Ch, T>::type 
203 resolve(T& t, mpl::true_)
204
205     typedef typename resolve_traits<Mode, Ch, T>::type return_type;
206     return return_type(wrap(t));
207 }
208
209 template<typename Mode, typename Ch, typename T>
210 typename resolve_traits<Mode, Ch, T>::type 
211 resolve(T& t, mpl::false_)
212
213     typedef typename resolve_traits<Mode, Ch, T>::type return_type;
214     return return_type(t);
215 }
216
217 template<typename Mode, typename Ch, typename T>
218 typename resolve_traits<Mode, Ch, T>::type 
219 resolve(T& t BOOST_IOSTREAMS_ENABLE_IF_STREAM(T))
220 { return resolve<Mode, Ch>(t, is_std_io<T>()); }
221
222 # endif // Borland 5.x, VC6-7.0 or GCC 2.9x //--------------------------------//
223 #endif // #ifndef BOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION //---------------//
224
225 } } } // End namespaces detail, iostreams, boost.
226
227 #include <boost/iostreams/detail/config/enable_warnings.hpp> // VC7.1 4224.
228
229 #endif // BOOST_IOSTREAMS_DETAIL_RESOLVE_HPP_INCLUDED