forked from boostorg/mpl
45 lines
1.2 KiB
C++
45 lines
1.2 KiB
C++
//-----------------------------------------------------------------------------
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// boost mpl/test/is_placeholder.cpp source file
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// See http://www.boost.org for updates, documentation, and revision history.
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//-----------------------------------------------------------------------------
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//
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// Copyright (c) 2000-02
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// Aleksey Gurtovoy
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// 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/mpl/is_placeholder.hpp"
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#include "boost/mpl/placeholders.hpp"
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#include "boost/preprocessor/repeat.hpp"
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#include "boost/preprocessor/inc.hpp"
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#include "boost/preprocessor/cat.hpp"
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#include "boost/static_assert.hpp"
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using namespace boost::mpl;
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struct UDT;
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#define AUX_IS_PLACEHOLDER_TEST(unused1, n, unused2) \
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{ BOOST_STATIC_ASSERT(is_placeholder< \
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BOOST_PP_CAT(_,BOOST_PP_INC(n)) \
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>::value); } \
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/**/
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int main()
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{
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BOOST_STATIC_ASSERT(!is_placeholder<int>::value);
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BOOST_STATIC_ASSERT(!is_placeholder<UDT>::value);
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BOOST_STATIC_ASSERT(is_placeholder<_>::value);
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BOOST_PP_REPEAT(
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BOOST_MPL_METAFUNCTION_MAX_ARITY
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, AUX_IS_PLACEHOLDER_TEST
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, unused
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)
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return 0;
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}
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