| .. Sequences/Intrinsic Metafunctions//sequence_tag |
| |
| sequence_tag |
| ============ |
| |
| Synopsis |
| -------- |
| |
| .. parsed-literal:: |
| |
| template< |
| typename X |
| > |
| struct sequence_tag |
| { |
| typedef |unspecified| type; |
| }; |
| |
| |
| |
| Description |
| ----------- |
| |
| ``sequence_tag`` is a |tag-metafunction| for all |tag dispatched| |
| `intrinsic sequence operations`__. |
| |
| __ `Intrinsic Metafunctions`_ |
| |
| |
| Header |
| ------ |
| |
| .. parsed-literal:: |
| |
| #include <boost/mpl/sequence_tag.hpp> |
| |
| |
| Parameters |
| ---------- |
| |
| +---------------+-------------------+-----------------------------------------------+ |
| | Parameter | Requirement | Description | |
| +===============+===================+===============================================+ |
| | ``X`` | Any type | A type to obtain a sequence tag for. | |
| +---------------+-------------------+-----------------------------------------------+ |
| |
| |
| Expression semantics |
| -------------------- |
| |
| For any arbitrary type ``x``: |
| |
| |
| .. parsed-literal:: |
| |
| typedef sequence_tag<x>::type tag; |
| |
| :Return type: |
| A type. |
| |
| :Semantics: |
| ``tag`` is an unspecified tag type for ``x``. |
| |
| |
| Complexity |
| ---------- |
| |
| Amortized constant time. |
| |
| |
| See also |
| -------- |
| |
| `Intrinsic Metafunctions`_, |Tag Dispatched Metafunction| |
| |
| |
| .. copyright:: Copyright © 2001-2009 Aleksey Gurtovoy and David Abrahams |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
