QedTablesArgParser.H

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#ifndef QED_TABLES_ARG_PARSER_
#define QED_TABLES_ARG_PARSER_
 
#include <optional>
#include <string>
#include <tuple>
#include <unordered_map>
#include <utility>
#include <variant>
#include <vector>
 
namespace ArgParser
{
    /* Possible types of parameters of command line arguments (no argument, int, double, or std::string) */
    enum class ArgType { NoArg, Integer, Double, String };
 
    /* This type represents the type of a command line argument: if it exists it is either an int, a double, or a std::string */
    using ArgVal = std::optional<std::variant<int, double, std::string>>;
 
    /* The type of a possible command line argument */
    using Key = std::tuple<std::string, ArgType, std::string>;
 
    /* The type of the map of the parsed command line arguments */
    using ParsedArgs = std::unordered_map<std::string, ArgVal>;

    template <typename T>
    T GetVal(const ArgVal& arg_val)
    {
        return std::get<T>(*arg_val);
    }

    ParsedArgs ParseArgs (const std::vector<Key>& keys, const int argc, char const* const* argv);

    void PrintHelp (const std::vector<Key>& cmd_list);
};
 
 
#endif //QED_TABLES_ARG_PARSER_