Added boost header

test/external/boost/msm/msm_grammar.hpp

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+// Copyright 2008 Christophe Henry
+// henry UNDERSCORE christophe AT hotmail DOT com
+// This is an extended version of the state machine available in the boost::mpl library
+// Distributed under the same license as the original.
+// Copyright for the original version:
+// Copyright 2005 David Abrahams and Aleksey Gurtovoy. 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)
+
+#ifndef BOOST_MSM_GRAMMAR_H
+#define BOOST_MSM_GRAMMAR_H
+
+#include <boost/msm/common.hpp>
+
+
+namespace boost { namespace msm
+{
+// base grammar for all of msm's proto-based grammars
+struct basic_grammar : proto::_
+{};
+
+// Forward-declare an expression wrapper
+template<typename Expr>
+struct msm_terminal;
+
+struct msm_domain
+    : proto::domain< proto::generator<msm_terminal>, basic_grammar >
+{};
+
+template<typename Expr>
+struct msm_terminal
+    : proto::extends<Expr, msm_terminal<Expr>, msm_domain>
+{
+    typedef
+        proto::extends<Expr, msm_terminal<Expr>, msm_domain>
+        base_type;
+    // Needs a constructor
+    msm_terminal(Expr const &e = Expr())
+        : base_type(e)
+    {}
+};
+
+} } // boost::msm
+#endif //BOOST_MSM_GRAMMAR_H
+