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#include <typeinfo>
#include <string>
#include <iostream>
namespace CommandLine
{
struct Parser
{
};
}
using std::string;
using std::cerr;
using std::endl;
using namespace CommandLine;
class Command
{
public:
enum Value
{
HELP,
VERSION,
DEFAULT
};
Command (Value v = Command::DEFAULT)
: v_ (v)
{
}
operator Value () const
{
return v_;
}
private:
Value v_;
};
int
version ();
int
help (int argc, char* argv[]);
int
main (int argc, char* argv[])
{
// Step 1: determine command
//
// * there is usually one command
// * command can be optional
// * command usually takes up one argument
//
CommandParser<Command> cp;
switch (cp.parse (argc, argv))
{
case Command::VERSION:
{
return version ();
}
case Command::HELP:
{
return help (argc, argv);
}
}
// Step 2: parse options
//
// * options are usually optional
// * options are usually position-independant
// * options usually do not repeat
// * options can take up more than one argument
//
OptionMap om;
CompositeParser op;
op.add (OptionParser<string> ("string", "--string", "-s"));
op.add (OptionParser<unsigned long> ("number", "--number", "-n"));
while (argc != 1 && !op.empty ())
{
om.insert (op.parse (argc, argv));
}
// Step 3: parse operands
//
// * operands usually position-dependant
// * operand usually take up one argument
//
OperandParser<string> odp;
string str = odp.parse (argc, argv);
unsigned long num = 0;
if (argc != 1)
{
OperandParser<unsigned long> op;
num = op.parse (argc, argv);
}
string s = om.count ("string") ? om["string"] : "default";
unsigned long l = om["number"];
// om.at ()
// om.get ()
// om.resolve ()
// om.option ()
// om.value ()
cerr << "opreation settings are:" << endl << endl
<< "option string : " << om.get<string> ("string", "default") << endl
<< "option number : " << om.get ("number", 10UL) << endl
<< "operand string : " << str << endl
<< "operand number : " << num << endl;
}
//
//
//
int
version ()
{
cerr << "foo 1.0" << endl;
return 0;
}
//
//
//
int
help (int argc, char* argv[])
{
Command subject;
if (argc != 1)
{
OperandParser<Command> op;
subject = op.parse (argc, argv);
}
switch (subject)
{
case Command::HELP:
{
cerr << "foo help [<command>]" << endl << endl
<< "\t If <command> is specified then print extended help" << endl
<< "\t information for specified command. Otherwise print" << endl
<< "\t general usage information." << endl;
break;
}
case Command::VERSION:
{
cerr << "foo version" << endl << endl
<< "\t Print version information." << endl;
break;
}
default:
{
cerr << "foo version" << endl
<< "foo help [<command>]" << endl
<< "foo [-s|--string <str>] [-n|--number <num>] <str> [<num>]"
<< endl;
break;
}
}
return 0;
}
//$Id$
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