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#include "tclap/CmdLine.h"
#include <iterator>
using namespace TCLAP;
// Define a simple 3D vector type
struct Vect3D {
double v[3];
// operator= will be used to assign to the vector
Vect3D& operator=(const std::string &str)
{
std::istringstream iss(str);
if (!(iss >> v[0] >> v[1] >> v[2]))
throw TCLAP::ArgParseException(str + " is not a 3D vector");
return *this;
}
std::ostream& print(std::ostream &os) const
{
std::copy(v, v + 3, std::ostream_iterator<double>(os, " "));
return os;
}
};
// Create an ArgTraits for the 3D vector type that declares it to be
// of string like type
namespace TCLAP {
template<>
struct ArgTraits<Vect3D> {
typedef StringLike ValueCategory;
};
}
int main(int argc, char *argv[])
{
CmdLine cmd("Command description message", ' ', "0.9");
ValueArg<Vect3D> vec("v", "vect", "vector",
true, Vect3D(), "3D vector", cmd);
try {
cmd.parse(argc, argv);
} catch(std::exception &e) {
std::cout << e.what() << std::endl;
return EXIT_FAILURE;
}
vec.getValue().print(std::cout);
std::cout << std::endl;
}
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