projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | .. Metafunctions/Miscellaneous//max |90 |
| 2 | ||
| 3 | max | |
| 4 | === | |
| 5 | ||
| 6 | Synopsis | |
| 7 | -------- | |
| 8 | ||
| 9 | .. parsed-literal:: | |
| 10 | ||
| 11 | template< | |
| 12 | typename N1 | |
| 13 | , typename N2 | |
| 14 | > | |
| 15 | struct max | |
| 16 | { | |
| 17 | typedef |unspecified| type; | |
| 18 | }; | |
| 19 | ||
| 20 | ||
| 21 | ||
| 22 | Description | |
| 23 | ----------- | |
| 24 | ||
| 25 | Returns the larger of its two arguments. | |
| 26 | ||
| 27 | ||
| 28 | Header | |
| 29 | ------ | |
| 30 | ||
| 31 | .. parsed-literal:: | |
| 32 | ||
| 33 | #include <boost/mpl/min_max.hpp> | |
| 34 | ||
| 35 | ||
| 36 | Model of | |
| 37 | -------- | |
| 38 | ||
| 39 | |Metafunction| | |
| 40 | ||
| 41 | ||
| 42 | Parameters | |
| 43 | ---------- | |
| 44 | ||
| 45 | +---------------+-------------------+-------------------------------------------+ | |
| 46 | | Parameter | Requirement | Description | | |
| 47 | +===============+===================+===========================================+ | |
| 48 | | ``N1``, ``N2``| Any type | Types to compare. | | |
| 49 | +---------------+-------------------+-------------------------------------------+ | |
| 50 | ||
| 51 | ||
| 52 | Expression semantics | |
| 53 | -------------------- | |
| 54 | ||
| 55 | For arbitrary types ``x`` and ``y``: | |
| 56 | ||
| 57 | ||
| 58 | .. parsed-literal:: | |
| 59 | ||
| 60 | typedef max<x,y>::type r; | |
| 61 | ||
| 62 | ||
| 63 | :Return type: | |
| 64 | A type. | |
| 65 | ||
| 66 | :Precondition: | |
| 67 | ``less<x,y>::value`` is a well-formed integral constant expression. | |
| 68 | ||
| 69 | :Semantics: | |
| 70 | Equivalent to | |
| 71 | ||
| 72 | .. parsed-literal:: | |
| 73 | ||
| 74 | typedef if_< less<x,y>,y,x >::type r; | |
| 75 | ||
| 76 | ||
| 77 | ||
| 78 | Complexity | |
| 79 | ---------- | |
| 80 | ||
| 81 | Constant time. | |
| 82 | ||
| 83 | ||
| 84 | Example | |
| 85 | ------- | |
| 86 | ||
| 87 | .. parsed-literal:: | |
| 88 | ||
| 89 | typedef fold< | |
| 90 | vector_c<int,1,7,0,-2,5,-1> | |
| 91 | , int_<10> | |
| 92 | , max<_1,_2> | |
| 93 | >::type r; | |
| 94 | ||
| 95 | BOOST_MPL_ASSERT(( is_same< r, int_<10> > )); | |
| 96 | ||
| 97 | ||
| 98 | See also | |
| 99 | -------- | |
| 100 | ||
| 101 | |Metafunctions|, |Comparison|, |min|, |less|, |max_element| | |
| 102 | ||
| 103 | ||
| 104 |