source: downloads/boost_1_34_1/libs/spirit/test/exception_tests.cpp @ 33

/*=============================================================================
    Copyright (c) 1998-2003 Joel de Guzman
    http://spirit.sourceforge.net/

    Use, modification and distribution is subject to 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 <boost/spirit/core.hpp>
#include <boost/spirit/error_handling/exceptions.hpp>
#include <iostream>
#include <boost/detail/lightweight_test.hpp>

using namespace std;
using namespace boost::spirit;

struct handler
{
    template <typename ScannerT, typename ErrorT>
    error_status<>
    operator()(ScannerT const& /*scan*/, ErrorT const& /*error*/) const
    {
        cout << "exception caught...Test concluded successfully" << endl;
        return error_status<>(error_status<>::fail);
    }
};

int
main()
{
    cout << "/////////////////////////////////////////////////////////\n\n";
    cout << "\t\tExceptions Test...\n\n";
    cout << "/////////////////////////////////////////////////////////\n\n";

    assertion<int>  expect(0);
    guard<int>      my_guard;

    bool r =
        parse("abcx",
            my_guard(ch_p('a') >> 'b' >> 'c' >> expect( ch_p('d') ))
            [
                handler()
            ]
        ).full;

    BOOST_TEST(!r);
    return boost::report_errors();
}