1 // (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
2 // (C) Copyright 2003-2007 Jonathan Turkanis
3 // Distributed under the Boost Software License, Version 1.0. (See accompanying
4 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
6 // See http://www.boost.org/libs/iostreams for documentation.
8 #ifndef BOOST_IOSTREAMS_STREAM_HPP_INCLUDED
9 #define BOOST_IOSTREAMS_STREAM_HPP_INCLUDED
15 #include <boost/iostreams/constants.hpp>
16 #include <boost/iostreams/detail/char_traits.hpp>
17 #include <boost/iostreams/detail/config/overload_resolution.hpp>
18 #include <boost/iostreams/detail/forward.hpp>
19 #include <boost/iostreams/detail/iostream.hpp> // standard streams.
20 #include <boost/iostreams/detail/select.hpp>
21 #include <boost/iostreams/stream_buffer.hpp>
22 #include <boost/mpl/and.hpp>
23 #include <boost/type_traits/is_convertible.hpp>
24 #include <boost/utility/base_from_member.hpp>
26 namespace boost { namespace iostreams { namespace detail {
28 template<typename Device, typename Tr>
29 struct stream_traits {
30 typedef typename char_type_of<Device>::type char_type;
31 typedef Tr traits_type;
32 typedef typename category_of<Device>::type mode;
34 iostreams::select< // Disambiguation required for Tru64.
36 is_convertible<mode, input>,
37 is_convertible<mode, output>
39 BOOST_IOSTREAMS_BASIC_IOSTREAM(char_type, traits_type),
40 is_convertible<mode, input>,
41 BOOST_IOSTREAMS_BASIC_ISTREAM(char_type, traits_type),
43 BOOST_IOSTREAMS_BASIC_OSTREAM(char_type, traits_type)
46 iostreams::select< // Disambiguation required for Tru64.
48 is_convertible<mode, input>,
49 is_convertible<mode, output>
52 is_convertible<mode, input>,
59 // By encapsulating initialization in a base, we can define the macro
60 // BOOST_IOSTREAMS_DEFINE_FORWARDING_FUNCTIONS to generate constructors
61 // without base member initializer lists.
62 template< typename Device,
64 BOOST_IOSTREAMS_CHAR_TRAITS(
65 BOOST_DEDUCED_TYPENAME char_type_of<Device>::type
69 BOOST_DEDUCED_TYPENAME char_type_of<Device>::type
71 typename Base = // VC6 Workaround.
72 BOOST_DEDUCED_TYPENAME
73 detail::stream_traits<Device, Tr>::stream_type >
75 : protected base_from_member< stream_buffer<Device, Tr, Alloc> >,
79 typedef base_from_member< stream_buffer<Device, Tr, Alloc> > pbase_type;
80 typedef typename stream_traits<Device, Tr>::stream_type stream_type;
82 using pbase_type::member; // Avoid warning about 'this' in initializer list.
84 stream_base() : pbase_type(), stream_type(&member) { }
87 } } } // End namespaces detail, iostreams, boost.
89 #ifdef BOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION
90 # include <boost/iostreams/detail/broken_overload_resolution/stream.hpp>
93 namespace boost { namespace iostreams {
96 // Template name: stream.
97 // Description: A iostream which reads from and writes to an instance of a
98 // designated device type.
99 // Template parameters:
100 // Device - A device type.
101 // Alloc - The allocator type.
103 template< typename Device,
105 BOOST_IOSTREAMS_CHAR_TRAITS(
106 BOOST_DEDUCED_TYPENAME char_type_of<Device>::type
110 BOOST_DEDUCED_TYPENAME char_type_of<Device>::type
112 struct stream : detail::stream_base<Device, Tr, Alloc> {
114 typedef typename char_type_of<Device>::type char_type;
116 : mode_of<Device>::type,
118 detail::stream_traits<Device, Tr>::stream_tag
120 BOOST_IOSTREAMS_STREAMBUF_TYPEDEFS(Tr)
123 detail::stream_traits<
125 >::stream_type stream_type;
128 BOOST_IOSTREAMS_FORWARD( stream, open_impl, Device,
129 BOOST_IOSTREAMS_PUSH_PARAMS,
130 BOOST_IOSTREAMS_PUSH_ARGS )
131 bool is_open() const { return this->member.is_open(); }
132 void close() { this->member.close(); }
133 bool auto_close() const { return this->member.auto_close(); }
134 void set_auto_close(bool close) { this->member.set_auto_close(close); }
135 bool strict_sync() { return this->member.strict_sync(); }
136 Device& operator*() { return *this->member; }
137 Device* operator->() { return &*this->member; }
138 Device* component() { return this->member.component(); }
140 void open_impl(const Device& dev BOOST_IOSTREAMS_PUSH_PARAMS()) // For forwarding.
143 this->member.open(dev BOOST_IOSTREAMS_PUSH_ARGS());
147 } } // End namespaces iostreams, boost.
149 #endif // #ifdef BOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION
151 #endif // #ifndef BOOST_IOSTREAMS_stream_HPP_INCLUDED