1 | // Copyright Vladimir Prus 2002-2004. |
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2 | // Distributed under the Boost Software License, Version 1.0. |
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3 | // (See accompanying file LICENSE_1_0.txt |
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4 | // or copy at http://www.boost.org/LICENSE_1_0.txt) |
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5 | |
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6 | |
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7 | #include <boost/program_options.hpp> |
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8 | using namespace boost::program_options; |
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9 | |
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10 | #include <iostream> |
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11 | using namespace std; |
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12 | |
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13 | /* Auxiliary functions for checking input for validity. */ |
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14 | |
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15 | /* Function used to check that 'opt1' and 'opt2' are not specified |
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16 | at the same time. */ |
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17 | void conflicting_options(const variables_map& vm, |
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18 | const char* opt1, const char* opt2) |
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19 | { |
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20 | if (vm.count(opt1) && !vm[opt1].defaulted() |
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21 | && vm.count(opt2) && !vm[opt2].defaulted()) |
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22 | throw logic_error(string("Conflicting options '") |
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23 | + opt1 + "' and '" + opt2 + "'."); |
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24 | } |
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25 | |
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26 | /* Function used to check that of 'for_what' is specified, then |
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27 | 'required_option' is specified too. */ |
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28 | void option_dependency(const variables_map& vm, |
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29 | const char* for_what, const char* required_option) |
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30 | { |
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31 | if (vm.count(for_what) && !vm[for_what].defaulted()) |
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32 | if (vm.count(required_option) == 0 || vm[required_option].defaulted()) |
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33 | throw logic_error(string("Option '") + for_what |
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34 | + "' requires option '" + required_option + "'."); |
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35 | } |
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36 | |
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37 | int main(int argc, char* argv[]) |
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38 | { |
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39 | try { |
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40 | string ofile; |
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41 | string macrofile, libmakfile; |
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42 | bool t_given = false; |
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43 | bool b_given = false; |
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44 | string mainpackage; |
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45 | string depends = "deps_file"; |
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46 | string sources = "src_file"; |
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47 | string root = "."; |
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48 | |
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49 | options_description desc("Allowed options"); |
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50 | desc.add_options() |
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51 | // First parameter describes option name/short name |
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52 | // The second is parameter to option |
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53 | // The third is description |
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54 | ("help,h", "print usage message") |
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55 | ("output,o", value(&ofile), "pathname for output") |
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56 | ("macrofile,m", value(¯ofile), "full pathname of macro.h") |
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57 | ("two,t", bool_switch(&t_given), "preprocess both header and body") |
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58 | ("body,b", bool_switch(&b_given), "preprocess body in the header context") |
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59 | ("libmakfile,l", value(&libmakfile), |
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60 | "write include makefile for library") |
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61 | ("mainpackage,p", value(&mainpackage), |
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62 | "output dependency information") |
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63 | ("depends,d", value(&depends), |
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64 | "write dependencies to <pathname>") |
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65 | ("sources,s", value(&sources), "write source package list to <pathname>") |
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66 | ("root,r", value(&root), "treat <dirname> as project root directory") |
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67 | ; |
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68 | |
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69 | variables_map vm; |
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70 | store(parse_command_line(argc, argv, desc), vm); |
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71 | |
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72 | if (vm.count("help")) { |
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73 | cout << desc << "\n"; |
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74 | return 0; |
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75 | } |
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76 | |
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77 | conflicting_options(vm, "output", "two"); |
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78 | conflicting_options(vm, "output", "body"); |
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79 | conflicting_options(vm, "output", "mainpackage"); |
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80 | conflicting_options(vm, "two", "mainpackage"); |
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81 | conflicting_options(vm, "body", "mainpackage"); |
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82 | |
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83 | conflicting_options(vm, "two", "body"); |
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84 | conflicting_options(vm, "libmakfile", "mainpackage"); |
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85 | conflicting_options(vm, "libmakfile", "mainpackage"); |
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86 | |
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87 | option_dependency(vm, "depends", "mainpackage"); |
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88 | option_dependency(vm, "sources", "mainpackage"); |
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89 | option_dependency(vm, "root", "mainpackage"); |
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90 | |
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91 | cout << "two = " << vm["two"].as<bool>() << "\n"; |
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92 | } |
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93 | catch(exception& e) { |
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94 | cerr << e.what() << "\n"; |
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95 | } |
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96 | } |
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