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// (C) Copyright Edward Diener 2011-2015
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// Use, modification and distribution are subject to the Boost Software License,
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// Version 1.0. (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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#if !defined(BOOST_VMD_ASSERT_IS_TUPLE_HPP)
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#define BOOST_VMD_ASSERT_IS_TUPLE_HPP
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#include <boost/vmd/detail/setup.hpp>
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#if BOOST_PP_VARIADICS
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/*
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The succeeding comments in this file are in doxygen format.
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*/
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/** \file
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*/
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/** \def BOOST_VMD_ASSERT_IS_TUPLE(sequence)
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\brief Asserts that the sequence is a Boost PP tuple.
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The macro checks that the sequence is a Boost PP tuple.
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If it is not a Boost PP tuple, it forces a compiler error.
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The macro normally checks for a Boost PP tuple only in
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debug mode. However an end-user can force the macro
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to check or not check by defining the macro
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BOOST_VMD_ASSERT_DATA to 1 or 0 respectively.
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sequence = a possible Boost PP tuple.
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@code
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returns = Normally the macro returns nothing.
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If the sequence is a Boost PP tuple, nothing is
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output.
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For VC++, because there is no sure way of forcing
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a compiler error from within a macro without producing
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output, if the sequence is not a Boost PP tuple the
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macro forces a compiler error by outputting invalid C++.
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For all other compilers a compiler error is forced
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without producing output if the sequence is not a
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Boost PP tuple.
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@endcode
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*/
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#if !BOOST_VMD_ASSERT_DATA
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#define BOOST_VMD_ASSERT_IS_TUPLE(sequence)
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#else
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#include <boost/vmd/assert.hpp>
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#include <boost/vmd/is_tuple.hpp>
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#define BOOST_VMD_ASSERT_IS_TUPLE(sequence) \
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BOOST_VMD_ASSERT \
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( \
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BOOST_VMD_IS_TUPLE(sequence), \
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BOOST_VMD_ASSERT_IS_TUPLE_ERROR \
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) \
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/**/
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#endif /* BOOST_VMD_ASSERT_DATA */
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#endif /* BOOST_PP_VARIADICS */
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#endif /* BOOST_VMD_ASSERT_IS_TUPLE_HPP */
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