id summary reporter owner description type status milestone component version severity resolution keywords cc 11616 Spirit unsigned to signed int comparison Duncan Paterson Joel de Guzman "The following code generates warnings in with gcc (-Wall) and MSVC. The warnings reference signed to unsigned int comparison. {{{#!c++ std::vector values; std::string line = ""111.2, 222.0, 333.3, 444.6, 555.5""; bool r = phrase_parse(line.begin(), line.end(), (float_ % "","") ,space, values); }}} The warnings can be silenced by changing the problem variables from size_t to int as shown in the attached patch although I'm not sure this is an ideal solution." Bugs closed To Be Determined spirit Boost 1.59.0 Cosmetic fixed