Keyword argument support

[SVN r15534]

include/boost/python/args_fwd.hpp

@@ -0,0 +1,41 @@
+// Copyright David Abrahams 2002. Permission to copy, use,
+// modify, sell and distribute this software is granted provided this
+// copyright notice appears in all copies. This software is provided
+// "as is" without express or implied warranty, and with no claim as
+// to its suitability for any purpose.
+#ifndef ARGS_FWD_DWA2002927_HPP
+# define ARGS_FWD_DWA2002927_HPP
+
+# include <boost/config.hpp>
+# include <cstddef>
+# include <utility>
+
+namespace boost { namespace python { 
+
+namespace detail
+{
+  struct keyword;
+  template <std::size_t nkeywords = 0> struct keywords;
+  
+  typedef std::pair<keyword const*, keyword const*> keyword_range;
+  
+  template <>
+  struct keywords<0>
+  {
+      BOOST_STATIC_CONSTANT(std::size_t, size = 0);
+      static keyword_range range() { return keyword_range(); }
+  };
+
+  namespace error
+  {
+    template <int keywords, int function_args>
+    struct more_keywords_than_function_arguments
+    {
+        typedef char too_many_keywords[keywords > function_args ? -1 : 1];
+    };
+  }
+}
+
+}} // namespace boost::python
+
+#endif // ARGS_FWD_DWA2002927_HPP