Re: [Boost-users] [1.33.0][date_time] Weird warning

From: Ben Hutchings (ben.hutchings_at_[hidden])
Date: 2005-08-17 09:24:59

Paul wrote:

>I got the following warning while compiling with (debian-testing) g++ 
>4.0.1-2
>
>I couldn't see the problem in the code?
>  
>
There may not be a problem. gcc/g++ 4.0 is more eager (too eager, in my 
opinion) to warn about problems in code paths for which its flow 
analysis can't determine reachability. If a code path is really 
unreachable but gcc doesn't think so, it should be possible to suppress 
such warnings by adding an assertion such as assert(!"This can't 
happen") (assuming that NDEBUG is not used).

>/usr/local/include/boost-1_33/boost/date_time/time_duration.hpp: In 
>function 'time_duration 
>boost::date_time::parse_undelimited_time_duration(const std::string&) 
>[with time_duration = boost::posix_time::time_duration]':
>/usr/local/include/boost-1_33/boost/date_time/time_duration.hpp:58: 
>warning: control may reach end of non-void function 'static typename 
>frac_sec_type::int_type 
>boost::date_time::time_resolution_traits<frac_sec_type, res, 
>resolution_adjust, frac_digits, v_type>::to_tick_count(v_type, v_type, 
>v_type, typename frac_sec_type::int_type) [with frac_sec_type = 
>boost::date_time::time_resolution_traits_adapted64_impl, 
>boost::date_time::time_resolutions res = micro, typename 
>frac_sec_type::int_type resolution_adjust = 1000000, short unsigned int 
>frac_digits = 6u, v_type = int32_t]' being inlined
>
You seem to have the wrong version of the Boost source. That function is 
in time_parsing.hpp, not time_duration.hpp, in version 1.33. You could 
install the libboost-date-time-dev package from sid instead of compiling 
it yourself.

Ben.