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