[Boost-bugs] [Boost C++ Libraries] #7949: Level 4 Warnings with VS2005

Subject: [Boost-bugs] [Boost C++ Libraries] #7949: Level 4 Warnings with VS2005
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-01-29 12:46:15

#7949: Level 4 Warnings with VS2005
---------------------------------------------------------+------------------
 Reporter:  Peter Brockamp <p.brockamp@…>                |       Owner:  apolukhin   
     Type:  Bugs                                         |      Status:  new         
Milestone:  To Be Determined                             |   Component:  lexical_cast
  Version:  Boost 1.52.0                                 |    Severity:  Optimization
 Keywords:  warnings VS2005                              |  
---------------------------------------------------------+------------------
 Try to compile the following with /W4 under VS2005:

 {{{
 #include "boost/lexical_cast.hpp"
 #include "boost/date_time.hpp"
 }}}

 This will give you a bunch of warnings:

 {{{
 \boost\lexical_cast.hpp(732) : warning C4244: '+=' : conversion from 'int'
 to 'unsigned short', possible loss of data
 \boost\lexical_cast.hpp(1627) : see reference to function template
 instantiation 'bool boost::detail::lcast_ret_unsigned<Traits,Type,CharT>(T
 &,const CharT *const ,const CharT *)' being compiled
 \boost\lexical_cast.hpp(1751) : see reference to function template
 instantiation 'bool
 boost::detail::lexical_stream_limited_src<CharT,Traits,RequiresStringbuffer>::shr_unsigned<unsigned
 short>(Type &)' being compiled
 \boost\lexical_cast.hpp(1751) : while compiling class template member
 function 'bool
 boost::detail::lexical_stream_limited_src<CharT,Traits,RequiresStringbuffer>::operator
 >>(unsigned short &)'
 \boost\lexical_cast.hpp(2137) : see reference to class template
 instantiation
 'boost::detail::lexical_stream_limited_src<CharT,Traits,RequiresStringbuffer>'
 being compiled
 \boost\lexical_cast.hpp(2083) : while compiling class template member
 function 'unsigned short
 boost::detail::lexical_cast_do_cast<Target,Source>::lexical_cast_impl(const
 Source &)'
 \boost\lexical_cast.hpp(2300) : see reference to class template
 instantiation 'boost::detail::lexical_cast_do_cast<Target,Source>' being
 compiled
 \boost\date_time\date_parsing.hpp(138) : see reference to function
 template instantiation 'Target boost::lexical_cast<unsigned
 short,Type>(const Source &)' being compiled
 \boost\date_time\gregorian\parsers.hpp(30) : see reference to function
 template instantiation 'date_type
 boost::date_time::parse_date<boost::gregorian::date>(const std::string
 &,int)' being compiled
 \boost\lexical_cast.hpp(780) : warning C4244: '+=' : conversion from 'int'
 to 'unsigned short', possible loss of data
 }}}

 Attached a patch which silences these, as is done in other libraries.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/7949>
Boost C++ Libraries <http://www.boost.org/>
Boost provides free peer-reviewed portable C++ source libraries.