boost/libs/spirit/test/x3/rule1.cpp

/*=============================================================================
    Copyright (c) 2001-2013 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)
=============================================================================*/

// this file deliberately contains non-ascii characters
// boostinspect:noascii

#include <boost/detail/lightweight_test.hpp>
#include <boost/spirit/home/x3.hpp>

#include <string>
#include <cstring>
#include <iostream>
#include "test.hpp"

int
main()
{
    using spirit_test::test_attr;
    using spirit_test::test;

    using namespace boost::spirit::x3::ascii;
    using boost::spirit::x3::rule;
    using boost::spirit::x3::int_;
    using boost::spirit::x3::lit;
    using boost::spirit::x3::unused_type;
    using boost::spirit::x3::phrase_parse;
    using boost::spirit::x3::skip_flag;

    { // basic tests

        auto a = lit('a');
        auto b = lit('b');
        auto c = lit('c');
        rule<class r> r;

        {
            auto start =
                r = *(a | b | c);

            BOOST_TEST(test("abcabcacb", start));
        }

        {
            auto start =
                r = (a | b) >> (r | b);

            BOOST_TEST(test("aaaabababaaabbb", start));
            BOOST_TEST(test("aaaabababaaabba", start, false));

            // ignore the skipper!
            BOOST_TEST(test("aaaabababaaabba", start, space, false));
        }
    }

    { // basic tests w/ skipper

        auto a = lit('a');
        auto b = lit('b');
        auto c = lit('c');
        rule<class r> r;

        {
            auto start =
                r = *(a | b | c);

            BOOST_TEST(test(" a b c a b c a c b ", start, space));
        }

        {
            auto start =
                r = (a | b) >> (r | b);

            BOOST_TEST(test(" a a a a b a b a b a a a b b b ", start, space));
            BOOST_TEST(test(" a a a a b a b a b a a a b b a ", start, space, false));
        }
    }

    { // basic tests w/ skipper but no final post-skip

        auto a = rule<class a>()
            = lit('a');

        auto b = rule<class b>()
            = lit('b');

        auto c = rule<class c>()
            = lit('c');

        {
            auto start = rule<class start>() = *(a | b) >> c;

            char const *s1 = " a b a a b b a c ... "
              , *const e1 = s1 + std::strlen(s1);
            BOOST_TEST(phrase_parse(s1, e1, start, space, skip_flag::dont_post_skip)
              && s1 == e1 - 5);

        }

        {
            rule<class start> start;

            auto p =
                start = (a | b) >> (start | c);
            {
                char const *s1 = " a a a a b a b a b a a a b b b c "
                  , *const e1 = s1 + std::strlen(s1);
                BOOST_TEST(phrase_parse(s1, e1, p, space, skip_flag::post_skip)
                  && s1 == e1);
            }
            {
                char const *s1 = " a a a a b a b a b a a a b b b c "
                  , *const e1 = s1 + std::strlen(s1);
                BOOST_TEST(phrase_parse(s1, e1, p, space, skip_flag::dont_post_skip)
                  && s1 == e1 - 1);
            }
        }
    }

    return boost::report_errors();
}