EQ2EMu/EQ2/source/depends/boost_1_72_0/libs/spirit/classic/example/fundamental/boiler_plate.cpp

/*=============================================================================
    Copyright (c) 2002-2003 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)
=============================================================================*/
///////////////////////////////////////////////////////////////////////////////
//
//  Boiler plate [ A template for writing your parser ]
//
//  [ JDG 9/17/2002 ]
//
///////////////////////////////////////////////////////////////////////////////
#include <boost/spirit/include/classic_core.hpp>
#include <iostream>
#include <string>

///////////////////////////////////////////////////////////////////////////////
using namespace std;
using namespace BOOST_SPIRIT_CLASSIC_NS;

///////////////////////////////////////////////////////////////////////////////
//
//  Semantic actions
//
///////////////////////////////////////////////////////////////////////////////
struct my_action
{
    template <typename IteratorT>
    void operator()(IteratorT first, IteratorT last) const
    {
        string s(first, last);
        cout << "\tMy Action got: " << s << endl;
    }
};

///////////////////////////////////////////////////////////////////////////////
//
//  My grammar
//
///////////////////////////////////////////////////////////////////////////////
struct my_grammar : public grammar<my_grammar>
{
    template <typename ScannerT>
    struct definition
    {
        definition(my_grammar const& self)
        {
            my_rule =
                *lexeme_d[(+graph_p)[my_action()]]
                ;
        }

        rule<ScannerT> my_rule;
        rule<ScannerT> const&
        start() const { return my_rule; }
    };
};

///////////////////////////////////////////////////////////////////////////////
//
//  Main program
//
///////////////////////////////////////////////////////////////////////////////
int
main()
{
    cout << "/////////////////////////////////////////////////////////\n\n";
    cout << "\t\t A boiler-plate parser...\n\n";
    cout << "/////////////////////////////////////////////////////////\n\n";
    cout << "Type anything or [q or Q] to quit\n\n";

    my_grammar g;

    string str;
    while (getline(cin, str))
    {
        if (str.empty() || str[0] == 'q' || str[0] == 'Q')
            break;

        if (parse(str.c_str(), g, space_p).full)
        {
            cout << "parsing succeeded\n";
        }
        else
        {
            cout << "parsing failed\n";
        }
    }

    cout << "Bye... :-) \n\n";
    return 0;
}