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diff --git a/host/lib/rfnoc/nocscript/parser.hpp b/host/lib/rfnoc/nocscript/parser.hpp
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+++ b/host/lib/rfnoc/nocscript/parser.hpp
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+//
+// Copyright 2015 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "expression.hpp"
+#include "function_table.hpp"
+#include <boost/shared_ptr.hpp>
+
+#ifndef INCLUDED_LIBUHD_RFNOC_NOCSCRIPT_PARSER_HPP
+#define INCLUDED_LIBUHD_RFNOC_NOCSCRIPT_PARSER_HPP
+
+namespace uhd { namespace rfnoc { namespace nocscript {
+
+class parser
+{
+  public:
+    typedef boost::shared_ptr<parser> sptr;
+
+    static sptr make(
+        function_table::sptr ftable,
+        expression_variable::type_getter_type var_type_getter,
+        expression_variable::value_getter_type var_value_getter
+    );
+
+    /*! The main parsing call: Turn a string of code into an expression tree.
+     *
+     * Evaluating the returned object will execute the code.
+     *
+     * \throws uhd::syntax_error if \p code contains syntax errors
+     */
+    virtual expression::sptr create_expr_tree(const std::string &code) = 0;
+};
+
+}}} /* namespace uhd::rfnoc::nocscript */
+
+#endif /* INCLUDED_LIBUHD_RFNOC_NOCSCRIPT_PARSER_HPP */
+// vim: sw=4 et: