| // Copyright Vladimir Prus 2002-2004. |
| // Distributed under the Boost Software License, Version 1.0. |
| // (See accompanying file LICENSE_1_0.txt |
| // or copy at http://www.boost.org/LICENSE_1_0.txt) |
| |
| |
| #include <boost/program_options.hpp> |
| using namespace boost::program_options; |
| |
| #include <iostream> |
| using namespace std; |
| |
| /* Auxiliary functions for checking input for validity. */ |
| |
| /* Function used to check that 'opt1' and 'opt2' are not specified |
| at the same time. */ |
| void conflicting_options(const variables_map& vm, |
| const char* opt1, const char* opt2) |
| { |
| if (vm.count(opt1) && !vm[opt1].defaulted() |
| && vm.count(opt2) && !vm[opt2].defaulted()) |
| throw logic_error(string("Conflicting options '") |
| + opt1 + "' and '" + opt2 + "'."); |
| } |
| |
| /* Function used to check that of 'for_what' is specified, then |
| 'required_option' is specified too. */ |
| void option_dependency(const variables_map& vm, |
| const char* for_what, const char* required_option) |
| { |
| if (vm.count(for_what) && !vm[for_what].defaulted()) |
| if (vm.count(required_option) == 0 || vm[required_option].defaulted()) |
| throw logic_error(string("Option '") + for_what |
| + "' requires option '" + required_option + "'."); |
| } |
| |
| int main(int argc, char* argv[]) |
| { |
| try { |
| string ofile; |
| string macrofile, libmakfile; |
| bool t_given = false; |
| bool b_given = false; |
| string mainpackage; |
| string depends = "deps_file"; |
| string sources = "src_file"; |
| string root = "."; |
| |
| options_description desc("Allowed options"); |
| desc.add_options() |
| // First parameter describes option name/short name |
| // The second is parameter to option |
| // The third is description |
| ("help,h", "print usage message") |
| ("output,o", value(&ofile), "pathname for output") |
| ("macrofile,m", value(¯ofile), "full pathname of macro.h") |
| ("two,t", bool_switch(&t_given), "preprocess both header and body") |
| ("body,b", bool_switch(&b_given), "preprocess body in the header context") |
| ("libmakfile,l", value(&libmakfile), |
| "write include makefile for library") |
| ("mainpackage,p", value(&mainpackage), |
| "output dependency information") |
| ("depends,d", value(&depends), |
| "write dependencies to <pathname>") |
| ("sources,s", value(&sources), "write source package list to <pathname>") |
| ("root,r", value(&root), "treat <dirname> as project root directory") |
| ; |
| |
| variables_map vm; |
| store(parse_command_line(argc, argv, desc), vm); |
| |
| if (vm.count("help")) { |
| cout << desc << "\n"; |
| return 0; |
| } |
| |
| conflicting_options(vm, "output", "two"); |
| conflicting_options(vm, "output", "body"); |
| conflicting_options(vm, "output", "mainpackage"); |
| conflicting_options(vm, "two", "mainpackage"); |
| conflicting_options(vm, "body", "mainpackage"); |
| |
| conflicting_options(vm, "two", "body"); |
| conflicting_options(vm, "libmakfile", "mainpackage"); |
| conflicting_options(vm, "libmakfile", "mainpackage"); |
| |
| option_dependency(vm, "depends", "mainpackage"); |
| option_dependency(vm, "sources", "mainpackage"); |
| option_dependency(vm, "root", "mainpackage"); |
| |
| cout << "two = " << vm["two"].as<bool>() << "\n"; |
| } |
| catch(exception& e) { |
| cerr << e.what() << "\n"; |
| } |
| } |