projects / ceph.git / blame
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|---|---|---|
| 7c673cae FG |
1 | .. Metafunctions/Concepts//Lambda Expression |30 |
| 2 | ||
| 3 | Lambda Expression | |
| 4 | ================= | |
| 5 | ||
| 6 | Description | |
| 7 | ----------- | |
| 8 | ||
| 9 | A |Lambda Expression| is a compile-time invocable entity in either of the following two | |
| 10 | forms: | |
| 11 | ||
| 12 | * |Metafunction Class| | |
| 13 | * |Placeholder Expression| | |
| 14 | ||
| 15 | Most of the MPL components accept either of those, and the concept | |
| 16 | gives us a consice way to describe these requirements. | |
| 17 | ||
| 18 | ||
| 19 | Expression requirements | |
| 20 | ----------------------- | |
| 21 | ||
| 22 | See corresponding |Metafunction Class| and |Placeholder Expression| specifications. | |
| 23 | ||
| 24 | ||
| 25 | Models | |
| 26 | ------ | |
| 27 | ||
| 28 | * |always| | |
| 29 | * |unpack_args| | |
| 30 | * ``plus<_, int_<2> >`` | |
| 31 | * ``if_< less<_1, int_<7> >, plus<_1,_2>, _1 >`` | |
| 32 | ||
| 33 | ||
| 34 | See also | |
| 35 | -------- | |
| 36 | ||
| 37 | |Metafunctions|, |Placeholders|, |apply|, |lambda| | |
| 38 | ||
| 39 | ||
| 40 |