1 files changed, 96 insertions, 0 deletions
diff --git a/src/boost/libs/program_options/example/real.cpp b/src/boost/libs/program_options/example/real.cpp
new file mode 100644
index 000000000..1c5d13221
--- /dev/null
+++ b/src/boost/libs/program_options/example/real.cpp
@@ -0,0 +1,96 @@
+// 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(&macrofile), "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";
+    }
+}