Boost C++ Libraries: Ticket #4022: dynamic_bitset compiler issue

component changed; owner set

Steven Watanabe — Wed, 17 Mar 2010 04:06:32 GMT

owner set to Gennaro Prota
component None → dynamic_bitset

status changed; resolution set

anonymous — Wed, 17 Mar 2010 12:25:37 GMT

status new → closed
resolution → fixed

status changed; resolution deleted

anonymous — Wed, 17 Mar 2010 12:26:12 GMT

status closed → reopened
resolution fixed

Steven Watanabe — Sun, 21 Mar 2010 05:09:43 GMT

Of course, you have to use an unsigned type. With that the code does compile, although it emits a warning. The warning is harmless in this case, although it would be better to fix it as you suggest.

#include <boost/dynamic_bitset/dynamic_bitset.hpp>
int main() {
    boost::dynamic_bitset<unsigned long long> bitset_type;
    bitset_type.resize(10, false);
}

boost/dynamic_bitset/dynamic_bitset.hpp(673) : warning C4244: 'initializing' : conversion from 'unsigned __int64' to 'const boost::dynamic_bitset<Block>::size_type', possible loss of data
        with
        [
            Block=unsigned __int64
        ]
        boost/dynamic_bitset/dynamic_bitset.hpp(649) : while compiling class template member function 'void boost::dynamic_bitset<Block>::resize(boost::dynamic_bitset<Block>::size_type,bool)'
        with
        [
            Block=unsigned __int64
        ]
        .\scratch.cpp(4) : see reference to class template instantiation 'boost::dynamic_bitset<Block>' being compiled
        with
        [
            Block=unsigned __int64
        ]

status changed; resolution set

Steven Watanabe — Sun, 13 Jun 2010 04:37:01 GMT

status reopened → closed
resolution → fixed

(In [62898]) Use the correct variable type to save the result of count_extra_bits(). Fixes #4022.