Re: [Boost-users] Compile error of data_time

From: Jeff Garland (jeff_at_[hidden])
Date: 2004-12-08 08:12:53

On Wed, 8 Dec 2004 14:56:5 +0800, zhengyi wrote
> boost-users:
> 	Here is a new user's letter for help:
> 
>     when i compile the whole boost(version_1_32_0), it show some 
> error of data_time.
> 
> the file greg_month.cpp failed. in the   lexical_cast.hpp£¬line 126
>             string_type s(boost::lexical_cast<string_type>("not-a-
> date-time"));
> 
> the compiler said :
> 	binary '>>' : no operator found which takes a right-hand operand of 
> type_put<Config,charT,OutputIterator>::string_type' (or there is no 
> acceptable conversion)
> 
>     When tracing down the error message, I found that 
> [[date_names_put::string_type]] actually means [[std::basic_string<charT>]]
> and in file lexical_cast.hpp line 146 -- 168 there are right 
> overload of operator>>. Why the compiler complain about can't find 
> the wellformed operator?

I believe this to be related to STLport and it's support for wchar_t somehow.
     My only real suggestion is to play with the configuration.  One thing you
can try is to set BOOST_NO_STD_WSTRING when you try to compile date-time. 
That will make sure that date-time doesn't try to use wchar_t.  A bit more
drastic would be to set BOOST_DATE_TIME_INCLUDE_LIMITED_HEADERS.  See
boost/date_time/compiler_config.hpp.  There you will see that under certain
conditions we set that

// workaround for errors associated with output for date classes 
// modifications and input streaming for time classes. 
// Compilers affected are:
// gcc295, msvc (neither with STLPort), any borland
// 
#if (((defined(__GNUC__) && (__GNUC__ < 3)) || \
      (defined(_MSC_VER) && (_MSC_VER <= 1200)) ) && \
      !defined(_STLP_OWN_IOSTREAMS) ) || \
       defined(__BORLANDC__)
#define BOOST_DATE_TIME_INCLUDE_LIMITED_HEADERS
#endif

It's possible there are times with STLPort that this needs to be set.

> My Compiler is msvc71 and STLport-5.0-0125 was installed with it's 
> own iostream.
> 
> the cmdline is 
> 
> bjam	"-sVC71_ROOT=D:\Program Files\Microsoft\Microsoft Visual Studio 
> .NET 2003\Vc7" 		"-sSTLPORT_PATH=D:\Program 
> Files\Programming_Tools\STLport-5.0-0125\stlport" 		"-sSTLPORT_5.0-
> 0125_PATH=D:\Program Files\Programming_Tools\STLport-5.0-0125" 		"-
> sSTLPORT_VERSIONS=5.0-0125" 		"-sTOOLS=vc-7_1-stlport" 		"-
> -prefix=D:\Program Files\Programming_Tools\Boost_1_32"  		install -
> -with-date_time 
> 
> this problem has killed so many brain cells of mine !

Sorry to hear that :-(

Jeff