4 * This file is part of LyX, the document processor.
5 * Licence details can be found in the file COPYING.
7 * \author Lars Gullik Bjønnes
9 * Full author contact details are available in file CREDITS.
12 #ifndef DEBUG_STREAM_HPP
13 #define DEBUG_STREAM_HPP
17 #include <boost/version.hpp>
22 #if BOOST_VERSION < 103300
23 # include <boost/test/detail/nullstream.hpp>
25 # include <boost/test/utils/nullstream.hpp>
29 # define TEMPORARY_DEBUG_MACRO DEBUG
47 static bool match(type a, type b) {
48 return (b <= a || (b == ANY && a > NONE));
52 #ifdef TEMPORARY_DEBUG_MACRO
53 # define DEBUG TEMPORARY_DEBUG_MACRO
54 # undef TEMPORARY_DEBUG_MACRO
58 template <class dtrait,
60 class traits = std::char_traits<charT> >
61 class basic_debugstream : public std::basic_ostream<charT, traits> {
64 typedef typename debug::type Type;
67 : std::basic_ostream<charT, traits>(0), dt(debug::NONE),
68 realbuf_(0), enabled_(true)
71 /// Constructor, sets the debug level to t.
72 explicit basic_debugstream(std::basic_streambuf<charT, traits> * buf)
73 : std::basic_ostream<charT, traits>(buf), dt(debug::NONE),
74 realbuf_(0), enabled_(true)
77 /// Sets the debug level to t.
82 /// Returns the current debug level.
87 /// Returns true if t is part of the current debug level.
88 bool debugging(Type t = debug::ANY) const
90 if (debug::match(dt, t)) return true;
94 /** Returns the no-op stream if t is not part of the
95 current debug level otherwise the real debug stream
97 Use: dbgstream[Debug::INFO] << "Info!\n";
99 std::basic_ostream<charT, traits> & operator[](Type t) {
100 if (debug::match(dt, t))
104 /// Disable the stream completely
108 realbuf_ = this->rdbuf();
109 rdbuf(nullstream.rdbuf());
113 /// Enable the stream after a possible call of disable()
117 this->rdbuf(realbuf_);
122 /// The current debug level
124 /// The no-op stream.
125 boost::basic_onullstream<charT, traits> nullstream;
126 /// The buffer of the real stream
127 std::streambuf * realbuf_;
128 /// Is the stream enabled?
132 typedef basic_debugstream<debug_trait> debugstream;