COIN-OR::LEMON - Graph Library

source: lemon-1.2/demo/arg_parser_demo.cc @ 877:141f9c0db4a3

Last change on this file since 877:141f9c0db4a3 was 877:141f9c0db4a3, checked in by Alpar Juttner <alpar@…>, 9 years ago

Unify the sources (#339)

File size: 3.6 KB
Line 
1/* -*- mode: C++; indent-tabs-mode: nil; -*-
2 *
3 * This file is a part of LEMON, a generic C++ optimization library.
4 *
5 * Copyright (C) 2003-2010
6 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
7 * (Egervary Research Group on Combinatorial Optimization, EGRES).
8 *
9 * Permission to use, modify and distribute this software is granted
10 * provided that this copyright notice appears in all copies. For
11 * precise terms see the accompanying LICENSE file.
12 *
13 * This software is provided "AS IS" with no warranty of any kind,
14 * express or implied, and with no claim as to its suitability for any
15 * purpose.
16 *
17 */
18
19///\ingroup demos
20///\file
21///\brief Argument parser demo
22///
23/// This example shows how the argument parser can be used.
24///
25/// \include arg_parser_demo.cc
26
27#include <lemon/arg_parser.h>
28
29using namespace lemon;
30int main(int argc, char **argv)
31{
32  // Initialize the argument parser
33  ArgParser ap(argc, argv);
34  int i;
35  std::string s;
36  double d = 1.0;
37  bool b, nh;
38  bool g1, g2, g3;
39
40  // Add a mandatory integer option with storage reference
41  ap.refOption("n", "An integer input.", i, true);
42  // Add a double option with storage reference (the default value is 1.0)
43  ap.refOption("val", "A double input.", d);
44  // Add a double option without storage reference (the default value is 3.14)
45  ap.doubleOption("val2", "A double input.", 3.14);
46  // Set synonym for -val option
47  ap.synonym("vals", "val");
48  // Add a string option
49  ap.refOption("name", "A string input.", s);
50  // Add bool options
51  ap.refOption("f", "A switch.", b)
52    .refOption("nohelp", "", nh)
53    .refOption("gra", "Choice A", g1)
54    .refOption("grb", "Choice B", g2)
55    .refOption("grc", "Choice C", g3);
56  // Bundle -gr* options into a group
57  ap.optionGroup("gr", "gra")
58    .optionGroup("gr", "grb")
59    .optionGroup("gr", "grc");
60  // Set the group mandatory
61  ap.mandatoryGroup("gr");
62  // Set the options of the group exclusive (only one option can be given)
63  ap.onlyOneGroup("gr");
64  // Add non-parsed arguments (e.g. input files)
65  ap.other("infile", "The input file.")
66    .other("...");
67
68  // Throw an exception when problems occurs. The default behavior is to
69  // exit(1) on these cases, but this makes Valgrind falsely warn
70  // about memory leaks.
71  ap.throwOnProblems();
72
73  // Perform the parsing process
74  // (in case of any error it terminates the program)
75  // The try {} construct is necessary only if the ap.trowOnProblems()
76  // setting is in use.
77  try {
78    ap.parse();
79  } catch (ArgParserException &) { return 1; }
80
81  // Check each option if it has been given and print its value
82  std::cout << "Parameters of '" << ap.commandName() << "':\n";
83
84  std::cout << "  Value of -n: " << i << std::endl;
85  if(ap.given("val")) std::cout << "  Value of -val: " << d << std::endl;
86  if(ap.given("val2")) {
87    d = ap["val2"];
88    std::cout << "  Value of -val2: " << d << std::endl;
89  }
90  if(ap.given("name")) std::cout << "  Value of -name: " << s << std::endl;
91  if(ap.given("f")) std::cout << "  -f is given\n";
92  if(ap.given("nohelp")) std::cout << "  Value of -nohelp: " << nh << std::endl;
93  if(ap.given("gra")) std::cout << "  -gra is given\n";
94  if(ap.given("grb")) std::cout << "  -grb is given\n";
95  if(ap.given("grc")) std::cout << "  -grc is given\n";
96
97  switch(ap.files().size()) {
98  case 0:
99    std::cout << "  No file argument was given.\n";
100    break;
101  case 1:
102    std::cout << "  1 file argument was given. It is:\n";
103    break;
104  default:
105    std::cout << "  "
106              << ap.files().size() << " file arguments were given. They are:\n";
107  }
108  for(unsigned int i=0;i<ap.files().size();++i)
109    std::cout << "    '" << ap.files()[i] << "'\n";
110
111  return 0;
112}
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