[boost] [chrono][ratio][boost_1_52_0_beta1] warning in user code

Subject: [boost] [chrono][ratio][boost_1_52_0_beta1] warning in user code
From: Jeff Flinn (Jeffrey.Flinn_at_[hidden])
Date: 2012-10-29 15:16:35

I've just downloaded boost_1_52_0_beta1 and get the warning below in my 
user code on VC11(I'm using thread which evidently brings in the above 
libs). I didn't see mention of this in trac. I'm moving forward from 
1.47 and from VC8 so I'm not sure if this is an indication of some 
project setting[s] of mine, or if it should be corrected in the lib?

Thanks, Jeff

6>D:\boost_1_52_0_beta1\boost/ratio/detail/overflow_helpers.hpp(136): 
warning C4293: '<<' : shift count negative or too big, undefined behavior
6> 
D:\boost_1_52_0_beta1\boost/ratio/detail/overflow_helpers.hpp(282) : see 
reference to class template instantiation 
'boost::ratio_detail::br_mul<X,Y>' being compiled
6>          with
6>          [
6>              X=0x01,
6>              Y=0x01
6>          ]
6>          D:\boost_1_52_0_beta1\boost/ratio/ratio.hpp(155) : see 
reference to class template instantiation 
'boost::ratio_detail::ratio_divide<R1,R2>' being compiled
6>          with
6>          [
6>              R1=boost::ratio<0x01,0x0989680>,
6>              R2=boost::ratio<0x01,0x03e8>
6>          ]
6>          D:\boost_1_52_0_beta1\boost/chrono/duration.hpp(305) : see 
reference to class template instantiation 'boost::ratio_divide<R1,R2>' 
being compiled
6>          with
6>          [
6>              R1=boost::ratio<0x01,0x0989680>,
6>              R2=boost::ratio<0x01,0x03e8>
6>          ]
6>          D:\boost_1_52_0_beta1\boost/chrono/duration.hpp(784) : see 
reference to class template instantiation 
'boost::chrono::detail::duration_cast<FromDuration,ToDuration>' being 
compiled
6>          with
6>          [
6> 
FromDuration=boost::chrono::duration<int_least64_t,boost::ratio<0x01,0x0989680>>,
6>              ToDuration=boost::chrono::milliseconds
6>          ]
6>          D:\boost_1_52_0_beta1\boost/chrono/ceil.hpp(27) : see 
reference to function template instantiation 
'boost::chrono::duration<Rep,Period> 
boost::chrono::duration_cast<To,int_least64_t,boost::ratio<N,D>>(const 
boost::chrono::duration<Rep,boost::ratio<N,D>> &)' being compiled
6>          with
6>          [
6>              Rep=int_least64_t,
6>              Period=boost::milli,
6>              To=boost::chrono::milliseconds,
6>              N=0x01,
6>              D=0x0989680
6>          ]
6> 
D:\boost_1_52_0_beta1\boost/thread/win32/basic_timed_mutex.hpp(199) : 
see reference to function template instantiation 'To 
boost::chrono::ceil<boost::chrono::milliseconds,int_least64_t,boost::ratio<N,D>>(const 
boost::chrono::duration<Rep,Period> &)' being compiled
6>          with
6>          [
6>              To=boost::chrono::milliseconds,
6>              N=0x01,
6>              D=0x0989680,
6>              Rep=int_least64_t,
6>              Period=boost::ratio<0x01,0x0989680>
6>          ]