[Boost-users] [logging] Build errors under VS2005 Unicode

From: Allen Cronce (allenslists_at_[hidden])
Date: 2008-08-28 12:27:01

Hi all,

I'm using the boost logging library from the sandbox, in conjunction  
with boost 1.35.0. I'm seeing problems building basic sample code  
under Windows VS2005 in projects where UNICODE and _UNICODE is defined.

Here's an example line of problematic code:

                g_log_err()->writer().add_formatter( formatter::idx(), "[%] "  );

Here's the error generated:

--snip--
1>c:\sources\logutils.cpp(56) : error C2664: 'void  
boost 
::logging 
::writer 
::format_write 
< 
formatter_base 
,destination_base 
,lock_resource 
,apply_format_and_write 
,router_type 
,formatter_array 
,destination_array 
 >::add_formatter<boost::logging::formatter::idx_t<>>(formatter,const  
boost::logging::char_type *)' : cannot convert parameter 2 from 'const  
char [5]' to 'const boost::logging::char_type *'
1>        with
1>        [
1>             
formatter_base 
= 
boost 
::logging 
::formatter::base<boost::logging::default_,boost::logging::default_>,
1>             
destination_base 
= 
boost 
::logging 
::destination::base<boost::logging::default_,boost::logging::default_>,
1>             
lock_resource=boost::logging::lock_resource_finder::single_thread,
1>             
apply_format_and_write 
= 
boost 
::logging 
::format_and_write 
::simple<boost::logging::optimize::cache_string_one_str<>>,
1>             
router_type=boost::logging::msg_route::simple<boost::logging::formatter::base<boost::logging::default_,boost::logging::default_>,boost::logging::destination::base<boost::logging::default_,boost::logging::default_>,boost::logging::lock_resource_finder::single_thread>,
1>             
formatter_array 
= 
boost 
::logging 
::array 
::shared_ptr_holder 
< 
boost 
::logging 
::formatter 
::base 
< 
boost 
::logging 
::default_,boost::logging::default_>,boost::logging::threading::mutex>,
1>             
destination_array 
= 
boost 
::logging 
::array 
::shared_ptr_holder 
< 
boost 
::logging 
::destination 
::base 
< 
boost 
::logging 
::default_,boost::logging::default_>,boost::logging::threading::mutex>,
1>            formatter=boost::logging::formatter::idx_t<>
1>        ]
1>        Types pointed to are unrelated; conversion requires  
reinterpret_cast, C-style cast or function-style cast
1>c:\sources\logutils.cpp(58) : error C2440: '<function-style-cast>' :  
cannot convert from 'const char [19]' to  
'boost::logging::formatter::time'
1>        No constructor could take the source type, or constructor  
overload resolution was ambiguous
1>c:\sources\logutils.cpp(58) : error C2780: 'void  
boost 
::logging 
::writer 
::format_write 
< 
formatter_base 
,destination_base 
,lock_resource 
,apply_format_and_write 
,router_type 
,formatter_array,destination_array>::add_formatter(formatter,const  
boost::logging::char_type *)' : expects 2 arguments - 1 provided
1>        with
1>        [
1>             
formatter_base 
= 
boost 
::logging 
::formatter::base<boost::logging::default_,boost::logging::default_>,
1>             
destination_base 
= 
boost 
::logging 
::destination::base<boost::logging::default_,boost::logging::default_>,
1>             
lock_resource=boost::logging::lock_resource_finder::single_thread,
1>             
apply_format_and_write 
= 
boost 
::logging 
::format_and_write 
::simple<boost::logging::optimize::cache_string_one_str<>>,
1>             
router_type=boost::logging::msg_route::simple<boost::logging::formatter::base<boost::logging::default_,boost::logging::default_>,boost::logging::destination::base<boost::logging::default_,boost::logging::default_>,boost::logging::lock_resource_finder::single_thread>,
1>             
formatter_array 
= 
boost 
::logging 
::array 
::shared_ptr_holder 
< 
boost 
::logging 
::formatter 
::base 
< 
boost 
::logging 
::default_,boost::logging::default_>,boost::logging::threading::mutex>,
1>             
destination_array 
= 
boost 
::logging 
::array 
::shared_ptr_holder 
< 
boost 
::logging 
::destination 
::base 
< 
boost 
::logging 
::default_,boost::logging::default_>,boost::logging::threading::mutex>
1>        ]
1>        c:\sources\thirdpartylibs\installedwin32\individual\boost 
\include\boost\logging\detail\format_write_detail.hpp(232) : see  
declaration of  
'boost 
::logging 
::writer 
::format_write 
< 
formatter_base 
,destination_base 
,lock_resource 
,apply_format_and_write 
,router_type,formatter_array,destination_array>::add_formatter'
1>        with
1>        [
1>             
formatter_base 
= 
boost 
::logging 
::formatter::base<boost::logging::default_,boost::logging::default_>,
1>             
destination_base 
= 
boost 
::logging 
::destination::base<boost::logging::default_,boost::logging::default_>,
1>             
lock_resource=boost::logging::lock_resource_finder::single_thread,
1>             
apply_format_and_write 
= 
boost 
::logging 
::format_and_write 
::simple<boost::logging::optimize::cache_string_one_str<>>,
1>             
router_type=boost::logging::msg_route::simple<boost::logging::formatter::base<boost::logging::default_,boost::logging::default_>,boost::logging::destination::base<boost::logging::default_,boost::logging::default_>,boost::logging::lock_resource_finder::single_thread>,
1>             
formatter_array 
= 
boost 
::logging 
::array 
::shared_ptr_holder 
< 
boost 
::logging 
::formatter 
::base 
< 
boost 
::logging 
::default_,boost::logging::default_>,boost::logging::threading::mutex>,
1>             
destination_array 
= 
boost 
::logging 
::array 
::shared_ptr_holder 
< 
boost 
::logging 
::destination 
::base 
< 
boost 
::logging 
::default_,boost::logging::default_>,boost::logging::threading::mutex>
1>        ]
--snip--

According to the documentation, the library should automatically sense  
the UNICODE definition under Windows and do the right thing. But that  
doesn't seem to work right.

I played around with trying to get this to work, but found that I had  
to always pass non-wide strings to the various interfaces. Ultimately  
I gave up and disabled the logging of wide character strings by  
defining the following:

#define	BOOST_LOG_DONOT_USE_WCHAR_T

For my particular needs, logging 8 bit characters probably makes more  
sense anyway. But it's somewhat bothersome that the logging library  
did not work out of the box as documented.

Sorry in advance if I missed some other configuration or nuance needed  
to get the logging library to work under UNICODE.

Best,
--
Allen Cronce