src/boost/libs/metaparse/test/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> >));
}