libs/spirit/test/qi/pass_container3.cpp

//  Copyright (c) 2001-2011 Hartmut Kaiser
// 
//  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)

// compilation test only

#include <boost/config/warning_disable.hpp>
#include <boost/detail/lightweight_test.hpp>

#include <string>
#include <vector>

#include <boost/spirit/include/qi.hpp>
#include <boost/fusion/include/adapt_struct.hpp>

#include <boost/variant.hpp>

#include "test.hpp"

using namespace spirit_test;

//////////////////////////////////////////////////////////////////////////////
struct ast; // Forward declaration

typedef boost::variant<
    double, char, int, std::string, boost::recursive_wrapper<ast>
> ast_element;

struct ast 
{
    int op; 
    std::vector<ast_element> children;
    ast() {} 
};

BOOST_FUSION_ADAPT_STRUCT(
    ast,
    (int, op)
    (std::vector<ast_element>, children)
)

///////////////////////////////////////////////////////////////////////////////
int main()
{
    namespace qi = boost::spirit::qi;

    {
        qi::rule<char const*, ast()> num_expr;
        num_expr = (*(qi::char_ >> num_expr))[ qi::_1 ];
    }

// doesn't currently work
//     {
//         qi::rule<char const*, std::string()> str = "abc";
//         qi::rule<char const*, std::string()> r = 
//             '"' >> *('\\' >> qi::char_ | str) >> "'";
// 
//         std::string s;
//         BOOST_TEST(test_attr("\"abc\\a\"", r, s) && s == "abca");
//     }

    return boost::report_errors();
}