id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
8991,A few implicit conversion compiler warnings,Jan Bouwer <JBouwer@…>,Antony Polukhin,"The following (trivial?) warnings were kindly highlighted by clang ^([#version version])^ - using diagnostic options as indicated in the [...].

File locations are in the format path:line:byte-column.
I based these on the 1.54.0 release, as svn rev. 85329 did not compile for me at the time.

*	boost/lexical_cast.hpp:1693:50
	**warning: implicit conversion changes signedness**: 'long' to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
	{{{
                end = begin + swprintf(begin, end-begin,
                              ~~~~~~~~        ~~~^~~~~~
}}}
	
*	boost/lexical_cast.hpp:1703:50
	**warning: implicit conversion changes signedness**: 'long' to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
	{{{
                end = begin + swprintf(begin, end-begin,
                              ~~~~~~~~        ~~~^~~~~~
}}}

*	boost/lexical_cast.hpp:1711:50
	**warning: implicit conversion changes signedness**: 'long' to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
	{{{
                end = begin + swprintf(begin, end-begin,
                              ~~~~~~~~        ~~~^~~~~~
}}}

*	boost/lexical_cast.hpp:791:68
	**warning: operand of ? changes signedness**: 'int' to 'unsigned int' & 'long' to 'unsigned long' [-Wsign-conversion]
	{{{
                value < 0 ? 0u - static_cast<result_type>(value) : value
                                                                   ^~~~~
}}}
	from:
	{{{
boost/lexical_cast.hpp:1627:52: note: in instantiation of function template specialization 'boost::detail::lcast_to_unsigned<int>' requested here
                start = lcast_put_unsigned<Traits>(lcast_to_unsigned(n), finish);
                                                   ^
boost/lexical_cast.hpp:1816:66: note: in instantiation of function template specialization 'boost::detail::lexical_stream_limited_src<char, std::__1::char_traits<char>, false>::shl_signed<int>' requested here
            bool operator<<(int n)                      { return shl_signed(n); }
                                                                 ^
}}}
	and
	{{{
boost/lexical_cast.hpp:1627:52: note: in instantiation of function template specialization 'boost::detail::lcast_to_unsigned<long>' requested here
                start = lcast_put_unsigned<Traits>(lcast_to_unsigned(n), finish);
                                                   ^
boost/lexical_cast.hpp:1817:66: note: in instantiation of function template specialization 'boost::detail::lexical_stream_limited_src<char, std::__1::char_traits<char>, false>::shl_signed<long>' requested here
            bool operator<<(long n)                     { return shl_signed(n); }
}}}

*	boost/lexical_cast.hpp:1962:30
	**warning: implicit conversion changes signedness**: 'utype' (aka 'unsigned int') to 'int' [-Wsign-conversion]
	{{{
                    output = out_tmp;
                           ~ ^~~~~~~
}}}
	{{{
boost/lexical_cast.hpp:2032:74: note: in instantiation of function template specialization 'boost::detail::lexical_stream_limited_src<char, std::__1::char_traits<char>, false>::shr_signed<int>' requested here
            bool operator>>(int& output)                        { return shr_signed(output); }
                                                                         ^
}}}


==== [=#version ""clang --version""]
{{{
Apple LLVM version 4.2 (clang-425.0.28) (based on LLVM 3.2svn)
Target: x86_64-apple-darwin12.4.0
Thread model: posix
}}}",Bugs,closed,Boost 1.69,lexical_cast,Boost 1.54.0,Cosmetic,fixed,,