Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

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libs/spirit/example/qi/calc6/calc6c.cpp

/*=============================================================================
    Copyright (c) 2001-2010 Joel de Guzman

    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 "calc6c.hpp"

// This is not really called. Its only purpose is to
// instantiate the constructor of the grammar.
void instantiate_statement()
{
    typedef std::string::const_iterator iterator_type;
    std::vector<int> code;
    statement<iterator_type> g(code);
}