Function add_option

tests/ComplexTypeTest.cpp:15–33

using cx = std::complex<double>;

CLI::Option *
add_option(CLI::App &app, std::string name, cx &variable, std::string description = "", bool defaulted = false) {
    CLI::callback_t fun = [&variable](CLI::results_t res) {
        double x = 0, y = 0;
        bool worked = CLI::detail::lexical_cast(res[0], x) && CLI::detail::lexical_cast(res[1], y);
        if(worked)
            variable = cx(x, y);
        return worked;
    };

    CLI::Option *opt = app.add_option(name, fun, description, defaulted);
    opt->type_name("COMPLEX")->type_size(2);
    if(defaulted) {
        std::stringstream out;
        out << variable;
        opt->default_str(out.str());
    }
    return opt;
}

TEST_CASE_METHOD(TApp, "AddingComplexParser", "[complex]") {