alpar@209: /* -*- mode: C++; indent-tabs-mode: nil; -*-
alpar@85:  *
alpar@209:  * This file is a part of LEMON, a generic C++ optimization library.
alpar@85:  *
alpar@440:  * Copyright (C) 2003-2009
alpar@85:  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
alpar@85:  * (Egervary Research Group on Combinatorial Optimization, EGRES).
alpar@85:  *
alpar@85:  * Permission to use, modify and distribute this software is granted
alpar@85:  * provided that this copyright notice appears in all copies. For
alpar@85:  * precise terms see the accompanying LICENSE file.
alpar@85:  *
alpar@85:  * This software is provided "AS IS" with no warranty of any kind,
alpar@85:  * express or implied, and with no claim as to its suitability for any
alpar@85:  * purpose.
alpar@85:  *
alpar@85:  */
alpar@85: 
alpar@85: ///\ingroup demos
alpar@85: ///\file
alpar@85: ///\brief Argument parser demo
alpar@85: ///
kpeter@88: /// This example shows how the argument parser can be used.
alpar@85: ///
kpeter@88: /// \include arg_parser_demo.cc
alpar@85: 
alpar@85: #include <lemon/arg_parser.h>
alpar@85: 
alpar@85: using namespace lemon;
ladanyi@311: int main(int argc, char **argv)
alpar@85: {
kpeter@204:   // Initialize the argument parser
kpeter@204:   ArgParser ap(argc, argv);
alpar@85:   int i;
alpar@85:   std::string s;
kpeter@204:   double d = 1.0;
kpeter@204:   bool b, nh;
kpeter@204:   bool g1, g2, g3;
kpeter@204: 
kpeter@204:   // Add a mandatory integer option with storage reference
kpeter@204:   ap.refOption("n", "An integer input.", i, true);
kpeter@204:   // Add a double option with storage reference (the default value is 1.0)
kpeter@204:   ap.refOption("val", "A double input.", d);
kpeter@204:   // Add a double option without storage reference (the default value is 3.14)
kpeter@204:   ap.doubleOption("val2", "A double input.", 3.14);
kpeter@204:   // Set synonym for -val option
kpeter@204:   ap.synonym("vals", "val");
kpeter@204:   // Add a string option
kpeter@204:   ap.refOption("name", "A string input.", s);
kpeter@204:   // Add bool options
kpeter@204:   ap.refOption("f", "A switch.", b)
kpeter@204:     .refOption("nohelp", "", nh)
kpeter@204:     .refOption("gra", "Choice A", g1)
kpeter@204:     .refOption("grb", "Choice B", g2)
kpeter@204:     .refOption("grc", "Choice C", g3);
kpeter@204:   // Bundle -gr* options into a group
kpeter@204:   ap.optionGroup("gr", "gra")
kpeter@204:     .optionGroup("gr", "grb")
kpeter@204:     .optionGroup("gr", "grc");
kpeter@204:   // Set the group mandatory
kpeter@204:   ap.mandatoryGroup("gr");
kpeter@204:   // Set the options of the group exclusive (only one option can be given)
kpeter@204:   ap.onlyOneGroup("gr");
kpeter@204:   // Add non-parsed arguments (e.g. input files)
kpeter@204:   ap.other("infile", "The input file.")
alpar@85:     .other("...");
alpar@209: 
alpar@842:   // Throw an exception when problems occurs. The default behavior is to
alpar@842:   // exit(1) on these cases, but this makes Valgrind falsely warn
alpar@842:   // about memory leaks.
alpar@842:   ap.throwOnProblems();
alpar@842:   
kpeter@204:   // Perform the parsing process
kpeter@204:   // (in case of any error it terminates the program)
alpar@842:   // The try {} construct is necessary only if the ap.trowOnProblems()
alpar@842:   // setting is in use.
alpar@842:   try {
alpar@842:     ap.parse();
alpar@842:   } catch (ArgParserException &) { return 1; }
alpar@85: 
kpeter@204:   // Check each option if it has been given and print its value
alpar@85:   std::cout << "Parameters of '" << ap.commandName() << "':\n";
alpar@85: 
kpeter@204:   std::cout << "  Value of -n: " << i << std::endl;
alpar@85:   if(ap.given("val")) std::cout << "  Value of -val: " << d << std::endl;
kpeter@204:   if(ap.given("val2")) {
kpeter@204:     d = ap["val2"];
kpeter@204:     std::cout << "  Value of -val2: " << d << std::endl;
kpeter@204:   }
alpar@85:   if(ap.given("name")) std::cout << "  Value of -name: " << s << std::endl;
alpar@85:   if(ap.given("f")) std::cout << "  -f is given\n";
kpeter@204:   if(ap.given("nohelp")) std::cout << "  Value of -nohelp: " << nh << std::endl;
kpeter@88:   if(ap.given("gra")) std::cout << "  -gra is given\n";
kpeter@88:   if(ap.given("grb")) std::cout << "  -grb is given\n";
kpeter@88:   if(ap.given("grc")) std::cout << "  -grc is given\n";
alpar@209: 
alpar@85:   switch(ap.files().size()) {
alpar@85:   case 0:
alpar@85:     std::cout << "  No file argument was given.\n";
alpar@85:     break;
alpar@85:   case 1:
alpar@85:     std::cout << "  1 file argument was given. It is:\n";
alpar@85:     break;
alpar@85:   default:
alpar@85:     std::cout << "  "
alpar@209:               << ap.files().size() << " file arguments were given. They are:\n";
alpar@85:   }
alpar@85:   for(unsigned int i=0;i<ap.files().size();++i)
alpar@85:     std::cout << "    '" << ap.files()[i] << "'\n";
alpar@209: 
kpeter@204:   return 0;
alpar@85: }