61 lines
1.5 KiB
C++
61 lines
1.5 KiB
C++
// Copyright Abel Sinkovics (abel@sinkovics.hu) 2011.
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#include <boost/metaparse/look_ahead.hpp>
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#include <boost/metaparse/start.hpp>
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#include <boost/metaparse/get_result.hpp>
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#include <boost/metaparse/digit_val.hpp>
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#include <boost/metaparse/fail.hpp>
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#include <boost/metaparse/is_error.hpp>
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#include <boost/metaparse/get_remaining.hpp>
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#include "common.hpp"
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#include <boost/mpl/apply_wrap.hpp>
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#include <boost/mpl/equal_to.hpp>
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#include <boost/mpl/equal.hpp>
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#include <boost/mpl/assert.hpp>
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#include "test_case.hpp"
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BOOST_METAPARSE_TEST_CASE(look_ahead)
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{
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using boost::metaparse::get_result;
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using boost::metaparse::look_ahead;
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using boost::metaparse::digit_val;
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using boost::metaparse::start;
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using boost::metaparse::is_error;
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using boost::metaparse::fail;
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using boost::metaparse::get_remaining;
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using boost::mpl::equal_to;
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using boost::mpl::apply_wrap2;
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using boost::mpl::equal;
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// test_returns_result
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BOOST_MPL_ASSERT((
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equal_to<
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int1,
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get_result<apply_wrap2<look_ahead<digit_val>, str_1983, start> >::type
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>
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));
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// test_returns_error
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BOOST_MPL_ASSERT((
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is_error<apply_wrap2<look_ahead<fail<int13> >, str_1983, start> >
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));
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// test_doesnt_process_input
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BOOST_MPL_ASSERT((
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equal<
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str_1983,
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get_remaining<apply_wrap2<look_ahead<digit_val>, str_1983, start> >::type
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>
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));
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}
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