always.cpp
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// Copyright Abel Sinkovics (abel@sinkovics.hu) 2010.
// 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/metaparse/always.hpp>
#include <boost/metaparse/digit.hpp>
#include <boost/metaparse/is_error.hpp>
#include <boost/metaparse/start.hpp>
#include <boost/metaparse/get_result.hpp>
#include "common.hpp"
#include <boost/mpl/apply_wrap.hpp>
#include <boost/mpl/assert.hpp>
#include "test_case.hpp"
BOOST_METAPARSE_TEST_CASE(always)
{
using boost::metaparse::get_result;
using boost::metaparse::always;
using boost::metaparse::digit;
using boost::metaparse::start;
using boost::metaparse::is_error;
using boost::mpl::equal_to;
using boost::mpl::apply_wrap2;
typedef always<digit, int13> always_digit_13;
// test_result
BOOST_MPL_ASSERT((
equal_to<
get_result<apply_wrap2<always_digit_13, str_1, start> >::type,
int13
>
));
// test_fail
BOOST_MPL_ASSERT((is_error<apply_wrap2<always_digit_13, str_a, start> >));
}