projects / ceph.git / blame
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|---|---|---|
| 7c673cae FG |
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 |