diff options
author | Carlo Zancanaro <carlo@pc-4w14-0.cs.usyd.edu.au> | 2012-07-10 13:44:21 +1000 |
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committer | Carlo Zancanaro <carlo@pc-4w14-0.cs.usyd.edu.au> | 2012-07-10 13:44:21 +1000 |
commit | ef4a319984d22b88a9024ff523700d657621124d (patch) | |
tree | 2821db78ccd6ce61ca64ad6fc98ba825b060ca6a /lemon/demo/arg_parser_demo.cc | |
parent | d3f13fdd23e17a8f4bb4083c24fee331a28351eb (diff) |
Add the LEMON graph library source to the repo
I'll likely be using it, so this just makes it easier to get to from
elsewhere. If I end up not using it then I can just delete it.
Diffstat (limited to 'lemon/demo/arg_parser_demo.cc')
-rw-r--r-- | lemon/demo/arg_parser_demo.cc | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/lemon/demo/arg_parser_demo.cc b/lemon/demo/arg_parser_demo.cc new file mode 100644 index 0000000..1bafac0 --- /dev/null +++ b/lemon/demo/arg_parser_demo.cc @@ -0,0 +1,112 @@ +/* -*- mode: C++; indent-tabs-mode: nil; -*- + * + * This file is a part of LEMON, a generic C++ optimization library. + * + * Copyright (C) 2003-2010 + * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport + * (Egervary Research Group on Combinatorial Optimization, EGRES). + * + * Permission to use, modify and distribute this software is granted + * provided that this copyright notice appears in all copies. For + * precise terms see the accompanying LICENSE file. + * + * This software is provided "AS IS" with no warranty of any kind, + * express or implied, and with no claim as to its suitability for any + * purpose. + * + */ + +///\ingroup demos +///\file +///\brief Argument parser demo +/// +/// This example shows how the argument parser can be used. +/// +/// \include arg_parser_demo.cc + +#include <lemon/arg_parser.h> + +using namespace lemon; +int main(int argc, char **argv) +{ + // Initialize the argument parser + ArgParser ap(argc, argv); + int i; + std::string s; + double d = 1.0; + bool b, nh; + bool g1, g2, g3; + + // Add a mandatory integer option with storage reference + ap.refOption("n", "An integer input.", i, true); + // Add a double option with storage reference (the default value is 1.0) + ap.refOption("val", "A double input.", d); + // Add a double option without storage reference (the default value is 3.14) + ap.doubleOption("val2", "A double input.", 3.14); + // Set synonym for -val option + ap.synonym("vals", "val"); + // Add a string option + ap.refOption("name", "A string input.", s); + // Add bool options + ap.refOption("f", "A switch.", b) + .refOption("nohelp", "", nh) + .refOption("gra", "Choice A", g1) + .refOption("grb", "Choice B", g2) + .refOption("grc", "Choice C", g3); + // Bundle -gr* options into a group + ap.optionGroup("gr", "gra") + .optionGroup("gr", "grb") + .optionGroup("gr", "grc"); + // Set the group mandatory + ap.mandatoryGroup("gr"); + // Set the options of the group exclusive (only one option can be given) + ap.onlyOneGroup("gr"); + // Add non-parsed arguments (e.g. input files) + ap.other("infile", "The input file.") + .other("..."); + + // Throw an exception when problems occurs. The default behavior is to + // exit(1) on these cases, but this makes Valgrind falsely warn + // about memory leaks. + ap.throwOnProblems(); + + // Perform the parsing process + // (in case of any error it terminates the program) + // The try {} construct is necessary only if the ap.trowOnProblems() + // setting is in use. + try { + ap.parse(); + } catch (ArgParserException &) { return 1; } + + // Check each option if it has been given and print its value + std::cout << "Parameters of '" << ap.commandName() << "':\n"; + + std::cout << " Value of -n: " << i << std::endl; + if(ap.given("val")) std::cout << " Value of -val: " << d << std::endl; + if(ap.given("val2")) { + d = ap["val2"]; + std::cout << " Value of -val2: " << d << std::endl; + } + if(ap.given("name")) std::cout << " Value of -name: " << s << std::endl; + if(ap.given("f")) std::cout << " -f is given\n"; + if(ap.given("nohelp")) std::cout << " Value of -nohelp: " << nh << std::endl; + if(ap.given("gra")) std::cout << " -gra is given\n"; + if(ap.given("grb")) std::cout << " -grb is given\n"; + if(ap.given("grc")) std::cout << " -grc is given\n"; + + switch(ap.files().size()) { + case 0: + std::cout << " No file argument was given.\n"; + break; + case 1: + std::cout << " 1 file argument was given. It is:\n"; + break; + default: + std::cout << " " + << ap.files().size() << " file arguments were given. They are:\n"; + } + for(unsigned int i=0;i<ap.files().size();++i) + std::cout << " '" << ap.files()[i] << "'\n"; + + return 0; +} |