ceph/src/boost/libs/mpl/doc/src/refmanual/LIMIT_MAP_SIZE.rst

   1 .. Macros/Configuration//BOOST_MPL_LIMIT_MAP_SIZE |60
   2
   3 BOOST_MPL_LIMIT_MAP_SIZE
   4 ========================
   5
   6 Synopsis
   7 --------
   8
   9 .. parsed-literal::
  10
  11     #if !defined(BOOST_MPL_LIMIT_MAP_SIZE)
  12     #   define BOOST_MPL_LIMIT_MAP_SIZE \\
  13             |idic| \\
  14     /\*\*/
  15     #endif
  16
  17
  18 Description
  19 -----------
  20
  21 ``BOOST_MPL_LIMIT_MAP_SIZE`` is an overridable configuration macro regulating
  22 the maximum arity of the ``map``\ 's `variadic form`__. In this
  23 implementation of the library, ``BOOST_MPL_LIMIT_MAP_SIZE`` has a default value
  24 of 20. To override the default limit, define ``BOOST_MPL_LIMIT_MAP_SIZE`` to
  25 the desired maximum arity rounded up to the nearest multiple of ten before
  26 including any library header. |preprocessed headers disclaimer|
  27
  28 __ `Variadic Sequence`_
  29
  30
  31 Example
  32 -------
  33
  34 .. parsed-literal::
  35
  36     #define BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS
  37     #define BOOST_MPL_LIMIT_MAP_SIZE 10
  38     ``#``\ include <boost/mpl/map.hpp>
  39     ``#``\ include <boost/mpl/pair.hpp>
  40     ``#``\ include <boost/mpl/int.hpp>
  41
  42     using namespace boost::mpl;
  43
  44     template< int i > struct ints : pair< int_<i>,int_<i> > {};
  45
  46     typedef map< ints<1> > m_1;
  47     typedef map< ints<1>, ints<2>, ints<3>, ints<4>, ints<5>
  48         ints<6>, ints<7>, ints<8>, ints<9>, ints<10> > m_10;
  49
  50     // typedef map< ints<1>, ints<2>, ints<3>, ints<4>, ints<5>
  51     //     ints<6>, ints<7>, ints<8>, ints<9>, ints<10>, ints<11> > m_11; // error!
  52
  53
  54 See also
  55 --------
  56
  57 |Configuration|, |BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS|, |BOOST_MPL_LIMIT_SET_SIZE|
  58
  59
  60 .. copyright:: Copyright ©  2001-2009 Aleksey Gurtovoy and David Abrahams
  61    Distributed under the Boost Software License, Version 1.0. (See accompanying
  62    file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)