Boost C++ Libraries: Ticket #13188: VS2017 reports typecast error in two_bit_color_map.hpp https://svn.boost.org/trac10/ticket/13188 <p> line 61 of boost/graph/two_bit_color_map.hpp, final parameter causes an int32 to unsigned char type conversion warning. </p> <p> Maybe resolved by changing line 61 to: </p> <blockquote> <p> std::fill(data.get(), data.get() + (n + elements_per_char - 1) / elements_per_char, static_cast&lt;unsigned char&gt;(white_color)); </p> </blockquote> en-us Boost C++ Libraries /htdocs/site/boost.png https://svn.boost.org/trac10/ticket/13188 Trac 1.4.3