id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
6297	Warning under VC	Antony Polukhin	Douglas Gregor	"Warning text:[[BR]]
c:\test\boost\boost\numeric\conversion\detail\converter.hpp(166) : warning C4800: 'int' : forcing value to bool 'true' or 'false' (performance warning)
        c:\test\boost\boost\numeric\conversion\detail\converter.hpp(165) : while compiling class template member function 'boost::numeric::range_check_result boost::numeric::convdetail::GT_HiT<Traits>::apply(bool)'
        with
        [
            Traits=conv_traits
        ]
        c:\test\boost\boost\numeric\conversion\detail\converter.hpp(236) : see reference to class template instantiation 'boost::numeric::convdetail::GT_HiT<Traits>' being compiled
        with
        [
            Traits=conv_traits
        ]
        c:\test\boost\boost\numeric\conversion\detail\converter.hpp(288) : see reference to class template instantiation 'boost::numeric::convdetail::combine<PredA,PredB>' being compiled
        with
        [
            PredA=boost::numeric::convdetail::non_applicable,
            PredB=boost::numeric::convdetail::GT_HiT<conv_traits>
        ]
        c:\test\boost\boost\numeric\conversion\detail\converter.hpp(287) : while compiling class template member function 'boost::numeric::range_check_result boost::numeric::convdetail::generic_range_checker<Traits,IsNegOverflow,IsPosOverflow,OverflowHandler>::out_of_range(bool)'
        with
        [
            Traits=conv_traits,
            IsNegOverflow=boost::numeric::convdetail::non_applicable,
            IsPosOverflow=boost::numeric::convdetail::GT_HiT<conv_traits>,
            OverflowHandler=boost::numeric::numeric_cast_traits<int,bool>::overflow_policy
        ]
        c:\test\boost\boost\numeric\conversion\detail\converter.hpp(508) : see reference to class template instantiation 'boost::numeric::convdetail::generic_range_checker<Traits,IsNegOverflow,IsPosOverflow,OverflowHandler>' being compiled
        with
        [
            Traits=conv_traits,
            IsNegOverflow=boost::numeric::convdetail::non_applicable,
            IsPosOverflow=boost::numeric::convdetail::GT_HiT<conv_traits>,
            OverflowHandler=boost::numeric::numeric_cast_traits<int,bool>::overflow_policy
        ]
        c:\test\boost\boost\numeric\conversion\converter.hpp(35) : see reference to class template instantiation 'boost::numeric::convdetail::non_rounding_converter<Traits,RangeChecker,RawConverter>' being compiled
        with
        [
            Traits=conv_traits,
            RangeChecker=boost::numeric::convdetail::generic_range_checker<conv_traits,boost::numeric::convdetail::non_applicable,boost::numeric::convdetail::GT_HiT<conv_traits>,boost::numeric::numeric_cast_traits<int,bool>::overflow_policy>,
            RawConverter=boost::numeric::raw_converter<conv_traits>
        ]
        c:\test\boost\boost\numeric\conversion\cast.hpp(53) : see reference to class template instantiation 'boost::numeric::converter<T,S,Traits,OverflowHandler,Float2IntRounder,RawConverter,UserRangeChecker>' being compiled
        with
        [
            T=int,
            S=bool,
            Traits=conv_traits,
            OverflowHandler=boost::numeric::numeric_cast_traits<int,bool>::overflow_policy,
            Float2IntRounder=boost::numeric::Trunc<bool>,
            RawConverter=boost::numeric::raw_converter<conv_traits>,
            UserRangeChecker=boost::numeric::numeric_cast_traits<int,bool>::range_checking_policy
        ]

The code that may lead to warning is like this:
{{{
    int val = boost::numeric_cast<int>(true);
}}}

"	Feature Requests	new	To Be Determined	numeric	Boost 1.48.0	Cosmetic			antoshkka@…