projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | .. Data Types/Numeric//bool_ |10 |
| 2 | ||
| 3 | bool\_ | |
| 4 | ====== | |
| 5 | ||
| 6 | Synopsis | |
| 7 | -------- | |
| 8 | ||
| 9 | .. parsed-literal:: | |
| 10 | ||
| 11 | template< | |
| 12 | bool C | |
| 13 | > | |
| 14 | struct bool\_ | |
| 15 | { | |
| 16 | // |unspecified| | |
| 17 | // ... | |
| 18 | }; | |
| 19 | ||
| 20 | typedef bool_<true> true\_; | |
| 21 | typedef bool_<false> false\_; | |
| 22 | ||
| 23 | ||
| 24 | Description | |
| 25 | ----------- | |
| 26 | ||
| 27 | A boolean |Integral Constant| wrapper. | |
| 28 | ||
| 29 | ||
| 30 | Header | |
| 31 | ------ | |
| 32 | ||
| 33 | .. parsed-literal:: | |
| 34 | ||
| 35 | #include <boost/mpl/bool.hpp> | |
| 36 | ||
| 37 | ||
| 38 | Model of | |
| 39 | -------- | |
| 40 | ||
| 41 | |Integral Constant| | |
| 42 | ||
| 43 | ||
| 44 | Parameters | |
| 45 | ---------- | |
| 46 | ||
| 47 | +---------------+-------------------------------+---------------------------+ | |
| 48 | | Parameter | Requirement | Description | | |
| 49 | +===============+===============================+===========================+ | |
| 50 | | ``C`` | A boolean integral constant | A value to wrap. | | |
| 51 | +---------------+-------------------------------+---------------------------+ | |
| 52 | ||
| 53 | Expression semantics | |
| 54 | -------------------- | |
| 55 | ||
| 56 | |Semantics disclaimer...| |Integral Constant|. | |
| 57 | ||
| 58 | For arbitrary integral constant ``c``: | |
| 59 | ||
| 60 | +-------------------+-----------------------------------------------------------+ | |
| 61 | | Expression | Semantics | | |
| 62 | +===================+===========================================================+ | |
| 63 | | ``bool_<c>`` | An |Integral Constant| ``x`` such that ``x::value == c`` | | |
| 64 | | | and ``x::value_type`` is identical to ``bool``. | | |
| 65 | +-------------------+-----------------------------------------------------------+ | |
| 66 | ||
| 67 | ||
| 68 | Example | |
| 69 | ------- | |
| 70 | ||
| 71 | .. parsed-literal:: | |
| 72 | ||
| 73 | BOOST_MPL_ASSERT(( is_same< bool_<true>::value_type, bool > )); | |
| 74 | BOOST_MPL_ASSERT(( is_same< bool_<true>, true\_ > )); } | |
| 75 | BOOST_MPL_ASSERT(( is_same< bool_<true>::type, bool_<true> > )); | |
| 76 | BOOST_MPL_ASSERT_RELATION( bool_<true>::value, ==, true ); | |
| 77 | assert( bool_<true>() == true ); | |
| 78 | ||
| 79 | ||
| 80 | See also | |
| 81 | -------- | |
| 82 | ||
| 83 | |Data Types|, |Integral Constant|, |int_|, |long_|, |integral_c| | |
| 84 | ||
| 85 | ||
| 86 | .. |true_| replace:: `true_`_ | |
| 87 | .. _`true_`: `bool_`_ | |
| 88 | ||
| 89 | .. |false_| replace:: `false_`_ | |
| 90 | .. _`false_`: `bool_`_ | |
| 91 | ||
| 92 | ||
| 93 |