Merge commit '4ebe6417a5fce5f0994fc0c31bebf732be96a07c' as 'boost'

boost/libs/program_options/src/positional_options.cpp

@@ -0,0 +1,53 @@
+// Copyright Vladimir Prus 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)
+
+#define BOOST_PROGRAM_OPTIONS_SOURCE
+#include <boost/program_options/config.hpp>
+
+#include <boost/program_options/positional_options.hpp>
+
+#include <boost/limits.hpp>
+
+#include <cassert>
+
+namespace boost { namespace program_options {
+
+    positional_options_description::positional_options_description()
+    {}
+
+    positional_options_description&
+    positional_options_description::add(const char* name, int max_count)
+    {
+        assert(max_count != -1 || m_trailing.empty());
+
+        if (max_count == -1)
+            m_trailing = name;
+        else {
+            m_names.resize(m_names.size() + max_count, name);
+        }
+        return *this;
+    }
+
+    unsigned
+    positional_options_description::max_total_count() const
+    {
+        return m_trailing.empty() ? 
+          static_cast<unsigned>(m_names.size()) : (std::numeric_limits<unsigned>::max)();
+    }
+    
+    const std::string& 
+    positional_options_description::name_for_position(unsigned position) const
+    {
+        assert(position < max_total_count());
+
+        if (position < m_names.size())
+            return m_names[position];
+        else
+            return m_trailing;
+    }
+
+
+}}
+