Function lexical_cast

examples/custom_parse.cpp:26–29

the lexical cast operator should be in the same namespace as the type for ADL to work properly

// the lexical cast operator should be in the same namespace as the type for ADL to work properly
bool lexical_cast(const std::string &input, Values<double> & /*v*/) {
    std::cout << "called correct lexical_cast function ! val: " << input << '\n';
    return true;
}

DoubleValues doubles;
void argparse(CLI::Option_group *group) { group->add_option("--dv", doubles)->default_str("0"); }