define_options.cc

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#ifndef DOXYGEN_SHOULD_SKIP_THIS
 
// goptions
#include "goptions.h"
 
// c++
#include <iostream>
 
using namespace std;
 
// returns this example options
GOptions defineOptions() {
 
    GOptions goptions;
    string help;
 
    // command line switch
    goptions.defineSwitch("log", "a switch, this is just an example.");
 
    // runno: 12,
    help = "Example: -runno=12\n";
    goptions.defineOption(GVariable("runno", 1, "sets the run number"), help);
 
    // nthreads: 8
    help = "Maximum number of threads to use.\n";
    help += "If the number of cores available ncores is less then nthreads, use ncores instead.\n";
    help += "If not set, use all available threads. 0: use all threads\n";
    help += "Example: -nthreads=12  : . \n";
    goptions.defineOption(GVariable("nthreads", 0, "maximum number of threads to use"), help);
 
    vector <GVariable> gparticle = {
            {"name",         goptions::NODFLT, "particle name"},
            {"multiplicity", 1,                "number of particles per event"},
            {"p",            goptions::NODFLT, "momentum"},
            {"theta",        "0*degrees",      "polar angle"},
            {"delta_theta",  0,                "Particle polar angle range, centered on theta. Default: 0"},
 
    };
 
    help = "Example to add three particles, one electron and two protons, identical except spread in theta: \n \n";
    help += "-gparticle=\"[{pname: e-, multiplicity: 1, p: 2300, theta: 23.0}, {pname: proton, multiplicity: 2, p: 1200, theta: 14.0, delta_theta: 10}]\"\n";
    goptions.defineOption("gparticle", "define the generator particle(s)", gparticle, help);
 
    return goptions;
}
 
// Define options
int main(int argc, char *argv[]) {
 
    auto gopts = std::make_shared<GOptions>(argc, argv, defineOptions());
 
    cout << " > Nthreads: " << gopts->getScalarInt("nthreads") << endl;
 
    return EXIT_SUCCESS;
}
 
#endif