Re: Status of stream.h?

Tue, 07 Jun 2005 08:38:09 -0700

Okay, I can see it. The problem is that the "ArbitraryType" template in the bottom of stream.h isn't expanded to std::string. I attempted a quick std::basic_string operator<< template and ended up having conflicts in other code due to having multiple template expansions and the compiler could not choose between them.
If you can add your own operator<< for std::string to stream.h until we can find a general implementation. 

The suggestion to do:

LOG4CXX_DEBUG(logger, "i = " << i);

is log4cxx-0.9.7 specific and is going away.


On Jun 7, 2005, at 3:14 AM, Paul Butcher wrote:



On Tuesday 07 June 2005 01:40, Curt Arnold wrote:



Hard to troubleshoot without that error message.  Could you at least
tell me what compiler and platform that you are encountering the
problem on?





Sorry, Curt - the same as in my earlier message: g++ (GCC) 3.3.4  
(pre 3.3.5

20040809) running on SUSE Linux 9.2. Here's a small test program which
reproduces the problem:

------------------------------------------------------
#include <log4cxx/stream.h>
#include <log4cxx/basicconfigurator.h>

#include <string>

int main()
{
  log4cxx::BasicConfigurator::configure();
  log4cxx::LoggerPtr logger = log4cxx::Logger::getRootLogger();

  log4cxx::logstream logstream(logger, log4cxx::Level::DEBUG);
  logstream << "test" << LOG4CXX_ENDMSG;

  std::string foo = "foo";
  logstream << foo;

  return 0;
}
------------------------------------------------------

And here is the full error message:

------------------------------------------------------
log4cxx/stream.h: In function `log4cxx::logstream&

   operator<<(log4cxx::logstream&, const ArbitraryType&) [with  
ArbitraryType =

   std::string]':
logtest.cpp:15:   instantiated from here
log4cxx/stream.h:212: error: no match for 'operator<<' in '
   (+lhs)->log4cxx::logstream::getStream() << rhs'
/usr/include/g++/bits/ostream.tcc:63: error: candidates are:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,
   _Traits>::operator<<(std::basic_ostream<_CharT,

   _Traits>&(*)(std::basic_ostream<_CharT, _Traits>&)) [with _CharT  
= wchar_t,

   _Traits = std::char_traits<wchar_t>]
/usr/include/g++/bits/ostream.tcc:74: error:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,
   _Traits>::operator<<(std::basic_ios<_CharT,

   _Traits>&(*)(std::basic_ios<_CharT, _Traits>&)) [with _CharT =  
wchar_t,

   _Traits = std::char_traits<wchar_t>]
/usr/include/g++/bits/ostream.tcc:86: error:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,

   _Traits>::operator<<(std::ios_base&(*)(std::ios_base&)) [with  
_CharT =

   wchar_t, _Traits = std::char_traits<wchar_t>]
/usr/include/g++/bits/ostream.tcc:122: error:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,
   _Traits>::operator<<(long int) [with _CharT = wchar_t, _Traits =
   std::char_traits<wchar_t>]
/usr/include/g++/bits/ostream.tcc:156: error:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,

   _Traits>::operator<<(long unsigned int) [with _CharT = wchar_t,  
_Traits =

   std::char_traits<wchar_t>]
/usr/include/g++/bits/ostream.tcc:98: error:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,
   _Traits>::operator<<(bool) [with _CharT = wchar_t, _Traits =
   std::char_traits<wchar_t>]
/usr/include/g++/ostream:178: error:
std::basic_ostream<_CharT,

   _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(short  
int) [with

   _CharT = wchar_t, _Traits = std::char_traits<wchar_t>]
/usr/include/g++/ostream:189: error:
std::basic_ostream<_CharT,

   _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(short  
unsigned

   int) [with _CharT = wchar_t, _Traits = std::char_traits<wchar_t>]
/usr/include/g++/ostream:193: error:
std::basic_ostream<_CharT,

   _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(int)  
[with _CharT

   = wchar_t, _Traits = std::char_traits<wchar_t>]
/usr/include/g++/ostream:204: error:
std::basic_ostream<_CharT,

   _Traits>& std::basic_ostream<_CharT, _Traits>::operator<< 
(unsigned int)

   [with _CharT = wchar_t, _Traits = std::char_traits<wchar_t>]
/usr/include/g++/bits/ostream.tcc:181: error:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,

   _Traits>::operator<<(long long int) [with _CharT = wchar_t,  
_Traits =

   std::char_traits<wchar_t>]
/usr/include/g++/bits/ostream.tcc:216: error:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,

   _Traits>::operator<<(long long unsigned int) [with _CharT =  
wchar_t,

_Traits
   = std::char_traits<wchar_t>]
/usr/include/g++/bits/ostream.tcc:241: error:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,
   _Traits>::operator<<(double) [with _CharT = wchar_t, _Traits =
   std::char_traits<wchar_t>]
/usr/include/g++/ostream:219: error:
std::basic_ostream<_CharT,

   _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(float)  
[with

   _CharT = wchar_t, _Traits = std::char_traits<wchar_t>]
/usr/include/g++/bits/ostream.tcc:265: error:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,
   _Traits>::operator<<(long double) [with _CharT = wchar_t, _Traits =
   std::char_traits<wchar_t>]
/usr/include/g++/bits/ostream.tcc:289: error:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,
   _Traits>::operator<<(const void*) [with _CharT = wchar_t, _Traits =
   std::char_traits<wchar_t>]
/usr/include/g++/bits/ostream.tcc:313: error:
   std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT,

   _Traits>::operator<<(std::basic_streambuf<_CharT, _Traits>*)  
[with _CharT =

   wchar_t, _Traits = std::char_traits<wchar_t>]
log4cxx/stream.h:153: error:                 log4cxx::logstream&
   operator<<(log4cxx::logstream&, const char*)
log4cxx/stream.h:173: error:                 log4cxx::logstream&
   operator<<(log4cxx::logstream&, const log4cxx::spi::LocationInfo&)
log4cxx/stream.h:181: error:                 log4cxx::logstream&
   operator<<(log4cxx::logstream&, const log4cxx::spi::LocationFlush&)
log4cxx/stream.h:188: error:                 log4cxx::logstream&
   operator<<(log4cxx::logstream&, const log4cxx::LevelPtr&)
log4cxx/stream.h:196: error:                 log4cxx::logstream&
   operator<<(log4cxx::logstream&, std::ios_base&(*)(std::ios_base&))
log4cxx/stream.h:210: error:                 log4cxx::logstream&

   operator<<(log4cxx::logstream&, const ArbitraryType&) [with  
ArbitraryType =

   std::string]
/usr/include/g++/bits/ostream.tcc:572: error:
   std::basic_ostream<_CharT, _Traits>&

   std::operator<<(std::basic_ostream<_CharT, _Traits>&, const  
char*) [with

   _CharT = wchar_t, _Traits = std::char_traits<wchar_t>]
/usr/include/g++/ostream:436: error:
std::basic_ostream<_CharT,

   _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&,  
char) [with

   _CharT = wchar_t, _Traits = std::char_traits<wchar_t>]
------------------------------------------------------

paul.butcher->msgCount++

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