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- // 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";
- }
- }
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