c++ - Why can't I use the << operator with the value extracted from this variables_map? -


i'm familiarizing myself boost::program_options (and c++ in general). wrote function below, can't quite understand error i'm getting. here's code (note po alias boost::program_options).

int application(po::variables_map& vm) {     std::cout << &vm << std::endl;     std::cout << vm["infile"];      return success; }

the error i'm receiving second line in function body. reads: "no match ‘operator<<’ (operand types ‘std::ostream {aka std::basic_ostream<char>}’ , ‘const boost::program_options::variable_value’)"

what doing wrong?


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