ceph/src/boost/boost/vmd/assert_is_tuple.hpp

   1
   2 //  (C) Copyright Edward Diener 2011-2015
   3 //  Use, modification and distribution are subject to the Boost Software License,
   4 //  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   5 //  http://www.boost.org/LICENSE_1_0.txt).
   6
   7 #if !defined(BOOST_VMD_ASSERT_IS_TUPLE_HPP)
   8 #define BOOST_VMD_ASSERT_IS_TUPLE_HPP
   9
  10 #include <boost/vmd/detail/setup.hpp>
  11
  12 #if BOOST_PP_VARIADICS
  13
  14 /*
  15
  16   The succeeding comments in this file are in doxygen format.
  17
  18 */
  19
  20 /** \file
  21 */
  22
  23 /** \def BOOST_VMD_ASSERT_IS_TUPLE(sequence)
  24
  25     \brief Asserts that the sequence is a Boost PP tuple.
  26
  27     The macro checks that the sequence is a Boost PP tuple.
  28     If it is not a Boost PP tuple, it forces a compiler error.
  29
  30     The macro normally checks for a Boost PP tuple only in
  31     debug mode. However an end-user can force the macro
  32     to check or not check by defining the macro
  33     BOOST_VMD_ASSERT_DATA to 1 or 0 respectively.
  34
  35     sequence = a possible Boost PP tuple.
  36
  37     returns  = Normally the macro returns nothing.
  38
  39                If the sequence is a Boost PP tuple, nothing is
  40                output.
  41
  42                For VC++, because there is no sure way of forcing
  43                a compiler error from within a macro without producing
  44                output, if the sequence is not a Boost PP tuple the
  45                macro forces a compiler error by outputting invalid C++.
  46
  47                For all other compilers a compiler error is forced
  48                without producing output if the sequence is not a
  49                Boost PP tuple.
  50
  51 */
  52
  53 #if !BOOST_VMD_ASSERT_DATA
  54
  55 #define BOOST_VMD_ASSERT_IS_TUPLE(sequence)
  56
  57 #else
  58
  59 #include <boost/vmd/assert.hpp>
  60 #include <boost/vmd/is_tuple.hpp>
  61
  62 #define BOOST_VMD_ASSERT_IS_TUPLE(sequence) \
  63    BOOST_VMD_ASSERT \
  64      ( \
  65      BOOST_VMD_IS_TUPLE(sequence), \
  66      BOOST_VMD_ASSERT_IS_TUPLE_ERROR \
  67      ) \
  68 /**/
  69
  70 #endif /* BOOST_VMD_ASSERT_DATA */
  71
  72 #endif /* BOOST_PP_VARIADICS */
  73 #endif /* BOOST_VMD_ASSERT_IS_TUPLE_HPP */