Rob Stewart wrote:
Vladimir Prus wrote:
Usage: options_description [options] Allowed options: --help : produce help message --optimization arg (=10) : optimization level -I [ --include-path ] arg : include path --input-file arg : input file
The (=10) is meant to give default value. The only problem I've found is that we need to specify empty default value string for std::vector, which leads to code like this:
("second", value< vector<int > >()->default_value(vector<int>(1, 1), ""))
Ok, maybe we just need 'vector_value' function which will take care of default values.
The default value could simply be given as a string in that case: "(1,1)" or whatever. You could also use the OutputFormatters library when it is accepted into Boost. (In that case, you just wait for your automated solution.)
In the highly likely case when the default value of vector is empty vector, output formatters will provide not very nice result. I still think that ultimately we'd need 'vector_value', since ("second", vector_value<int>()) is a lot better than ("second", value< vector<int > >()->default_value(vector<int>(), "")) - Volodya