Hello, for some time now I've been trying to split a given string at whitespaces: "A B C" -> "A", "B", "C". I want to use boost/algorithm/string #include "boost/algorithm/string/split.hpp" #include "boost/algorithm/string/compare.hpp" std::vector<std::string> tokenize(const std::string& text ) { std::vector<std::string> tokens; boost::algorithm::split(tokens, text, boost::algorithm::is_equal(" ")); return tokens; } but compilation on gcc 4.9.0 / boost 1.55.0 just gives: test.cpp: In function 'std::vector<std::basic_string<char> > tokenize(const string&)': test.cpp:40:71: error: no matching function for call to 'boost::algorithm::is_equal::is_equal(const char [2])' boost::algorithm::split(tokens, text, boost::algorithm::is_equal(" ")); ^ test.cpp:40:71: note: candidates are: In file included from /usr/include/boost/algorithm/string/finder.hpp:24:0, from /usr/include/boost/algorithm/string/split.hpp:17, from test.cpp:7: /usr/include/boost/algorithm/string/compare.hpp:34:16: note: boost::algorithm::is_equal::is_equal() struct is_equal ^ /usr/include/boost/algorithm/string/compare.hpp:34:16: note: candidate expects 0 arguments, 1 provided /usr/include/boost/algorithm/string/compare.hpp:34:16: note: boost::algorithm::is_equal::is_equal(const boost::algorithm::is_equal&) /usr/include/boost/algorithm/string/compare.hpp:34:16: note: no known conversion for argument 1 from 'const char [2]' to 'const boost::algorithm::is_equal&' What is wrong there? Thanks, Florian