id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
12478,boost::atomic< char* > generates warning on fetch_add on gcc 4.8+,Matt Hauck <matthauck@…>,Andrey Semashev,"I have a `boost::atomic< char* >` object, on which I am calling `fetch_add` with `ptrdiff_t`, and apparently only on gcc 4.8+, I am getting the following warning:

{{{
In file included from /home/foo/packages/boost_1_61_0/include/boost/atomic/detail/atomic_template.hpp:25:0,
                 from /home/foo/packages/boost_1_61_0/include/boost/atomic/atomic.hpp:22,
                 from /home/foo/packages/boost_1_61_0/include/boost/atomic.hpp:12,
                 from /home/foo/code/ThingThatUsesAtomic.h:0,
/home/foo/packages/boost_1_61_0/include/boost/atomic/detail/bitwise_cast.hpp: In instantiation of ‘To boost::atomics::detail::bitwise_cast(const From&) [with To = char*; From = long unsigned int]’:
/home/foo/packages/boost_1_61_0/include/boost/atomic/detail/atomic_template.hpp:449:59:   required from ‘T* boost::atomics::detail::base_atomic<T*, void*>::fetch_add(boost::atomics::detail::base_atomic<T*, void*>::difference_type, boost::memory_order) volatile [with T = char; boost::atomics::detail::base_atomic<T*, void*>::value_type = char*; boost::atomics::detail::base_atomic<T*, void*>::difference_type = long int]’
[ actual code references redacted ... ]
/home/foo/packages/boost_1_61_0/include/boost/atomic/detail/bitwise_cast.hpp:41:5: warning: casting ‘char*’ to ‘char&’ does not dereference pointer
}}}",Bugs,closed,To Be Determined,atomic,Boost 1.61.0,Problem,fixed,,