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

   1 .. Sequences/Intrinsic Metafunctions//sequence_tag
   2
   3 sequence_tag
   4 ============
   5
   6 Synopsis
   7 --------
   8
   9 .. parsed-literal::
  10
  11     template<
  12           typename X
  13         >
  14     struct sequence_tag
  15     {
  16         typedef |unspecified| type;
  17     };
  18
  19
  20
  21 Description
  22 -----------
  23
  24 ``sequence_tag`` is a |tag-metafunction| for all |tag dispatched|
  25 `intrinsic sequence operations`__.
  26
  27 __ `Intrinsic Metafunctions`_
  28
  29
  30 Header
  31 ------
  32
  33 .. parsed-literal::
  34
  35     #include <boost/mpl/sequence_tag.hpp>
  36
  37
  38 Parameters
  39 ----------
  40
  41 +---------------+-------------------+-----------------------------------------------+
  42 | Parameter     | Requirement       | Description                                   |
  43 +===============+===================+===============================================+
  44 | ``X``         | Any type          | A type to obtain a sequence tag for.          |
  45 +---------------+-------------------+-----------------------------------------------+
  46
  47
  48 Expression semantics
  49 --------------------
  50
  51 For any arbitrary type ``x``:
  52
  53
  54 .. parsed-literal::
  55
  56     typedef sequence_tag<x>::type tag;
  57
  58 :Return type:
  59     A type.
  60
  61 :Semantics:
  62     ``tag`` is an unspecified tag type for ``x``.
  63
  64
  65 Complexity
  66 ----------
  67
  68 Amortized constant time.
  69
  70
  71 See also
  72 --------
  73
  74 `Intrinsic Metafunctions`_, |Tag Dispatched Metafunction|
  75
  76
  77 .. copyright:: Copyright ©  2001-2009 Aleksey Gurtovoy and David Abrahams
  78    Distributed under the Boost Software License, Version 1.0. (See accompanying
  79    file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)