// (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 */