[Boost-users] compiler warnings using date_time library on VS.NET 2003

From: Sean Rohead (sean.rohead_at_[hidden])
Date: 2005-07-21 19:38:16

I am using VS.NET 2003 and have a simple program which merely includes the
Boost date_time library.  When compiling, I get 4 warning messages about
unsafe conversions.  Is there some compiler setting that I can change to get
rid of this warning?  Shouldn't I be able to include a Boost library without
getting warnings?

Thanks!

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
// main.cpp

#include "boost/date_time/posix_time/posix_time.hpp"

void main()
{
}

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

------ Build started: Project: boost, Configuration: Debug Win32 ------

Compiling...
main.cpp
c:\lib\boost_1_32_0\boost\date_time\posix_time\conversion.hpp(27) : warning
C4244: 'argument' : conversion from 'time_t' to 'long', possible loss of
data
c:\lib\boost_1_32_0\boost\date_time\time_system_counted.hpp(57) : warning
C4244: 'initializing' : conversion from
'boost::date_time::counted_time_rep<config>::int_type' to
'boost::date_time::gregorian_calendar_base<ymd_type_,date_int_type_>::date_int_type',
possible loss of data
        with
        [
            config=boost::posix_time::millisec_posix_time_system_config
        ]
        and
        [
            ymd_type_=boost::gregorian::greg_year_month_day,
            date_int_type_=boost::date_time::int_adapter<unsigned
long>::int_type
        ]
        c:\lib\boost_1_32_0\boost\date_time\time_system_counted.hpp(52) :
while compiling class-template member function
'boost::date_time::counted_time_rep<config>::date_type
boost::date_time::counted_time_rep<config>::date(void) const'
        with
        [
            config=boost::posix_time::millisec_posix_time_system_config
        ]
        c:\lib\boost_1_32_0\boost\date_time\time_system_counted.hpp(111) :
see reference to class template instantiation
'boost::date_time::counted_time_rep<config>' being compiled
        with
        [
            config=boost::posix_time::millisec_posix_time_system_config
        ]
        c:\lib\boost_1_32_0\boost\date_time\time.hpp(52) : see reference to
class template instantiation
'boost::date_time::counted_time_system<time_rep>' being compiled
        with
        [
            time_rep=boost::posix_time::int64_time_rep
        ]
        c:\lib\boost_1_32_0\boost\date_time\posix_time\ptime.hpp(32) : see
reference to class template instantiation
'boost::date_time::base_time<T,time_system>' being compiled
        with
        [
            T=boost::posix_time::ptime,
            time_system=boost::posix_time::posix_time_system
        ]
c:\lib\boost_1_32_0\boost\date_time\time_parsing.hpp(81) : warning C4267:
'initializing' : conversion from 'size_t' to 'int', possible loss of data
        c:\lib\boost_1_32_0\boost\date_time\posix_time\time_parsers.hpp(27)
: see reference to function template instantiation 'time_duration
boost::date_time::parse_delimited_time_duration<boost::posix_time::time_duration>(const
std::string &)' being compiled
        with
        [
            time_duration=boost::posix_time::time_duration
        ]
c:\lib\boost_1_32_0\boost\date_time\date_parsing.hpp(211) : warning C4244:
'argument' : conversion from 'std::allocator<_Ty>::value_type' to 'char',
possible loss of data
        with
        [
            _Ty=wchar_t
        ]
        c:\lib\boost_1_32_0\boost\date_time\date_parsing.hpp(253) : see
reference to function template instantiation 'date_type
boost::date_time::from_stream_type<date_type,std::basic_string<_Elem,_Traits,_Ax>::iterator>(iterator_type
&,iterator_type &,wchar_t)' being compiled
        with
        [
            date_type=boost::gregorian::date,
            _Elem=wchar_t,
            _Traits=std::char_traits<wchar_t>,
            _Ax=std::allocator<wchar_t>,
            iterator_type=std::basic_string<wchar_t,std::char_traits<wchar_t>,std::allocator<wchar_t>>::iterator
        ]
        c:\lib\boost_1_32_0\boost\date_time\gregorian\parsers.hpp(78) : see
reference to function template instantiation
'boost::date_time::period<point_rep,duration_rep>
boost::date_time::from_simple_string_type<boost::gregorian::date,wchar_t>(const
std::basic_string<_Elem,_Traits,_Ax> &)' being compiled
        with
        [
            point_rep=boost::gregorian::date,
            duration_rep=boost::gregorian::date_duration,
            _Elem=wchar_t,
            _Traits=std::char_traits<wchar_t>,
            _Ax=std::allocator<wchar_t>
        ]