third_party/boost/spirit/test/x3/lexeme.cpp

/*=============================================================================
    Copyright (c) 2001-2015 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 <boost/detail/lightweight_test.hpp>
#include <boost/spirit/home/x3.hpp>

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

int
main()
{
    using spirit_test::test;
    using boost::spirit::x3::ascii::space;
    using boost::spirit::x3::ascii::space_type;
    using boost::spirit::x3::ascii::digit;
    using boost::spirit::x3::lexeme;
    using boost::spirit::x3::rule;

    BOOST_SPIRIT_ASSERT_CONSTEXPR_CTORS(lexeme['x']);

    {
        BOOST_TEST((test(" 1 2 3 4 5", +digit, space)));
        BOOST_TEST((!test(" 1 2 3 4 5", lexeme[+digit], space)));
        BOOST_TEST((test(" 12345", lexeme[+digit], space)));
        BOOST_TEST((test(" 12345  ", lexeme[+digit], space, false)));

        // lexeme collapsing
        BOOST_TEST((!test(" 1 2 3 4 5", lexeme[lexeme[+digit]], space)));
        BOOST_TEST((test(" 12345", lexeme[lexeme[+digit]], space)));
        BOOST_TEST((test(" 12345  ", lexeme[lexeme[+digit]], space, false)));

        auto r = +digit;
        auto rr = lexeme[r];

        BOOST_TEST((!test(" 1 2 3 4 5", rr, space)));
        BOOST_TEST((test(" 12345", rr, space)));
    }

    return boost::report_errors();
}