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1 | ///////////////////////////////////////////////////////////////////////////// |
2 | // | |
3 | // (C) Copyright Ion Gaztanaga 2006-2013 | |
4 | // | |
5 | // Distributed under the Boost Software License, Version 1.0. | |
6 | // (See accompanying file LICENSE_1_0.txt or copy at | |
7 | // http://www.boost.org/LICENSE_1_0.txt) | |
8 | // | |
9 | // See http://www.boost.org/libs/intrusive for documentation. | |
10 | // | |
11 | ///////////////////////////////////////////////////////////////////////////// | |
12 | ||
13 | #ifndef BOOST_INTRUSIVE_LINK_MODE_HPP | |
14 | #define BOOST_INTRUSIVE_LINK_MODE_HPP | |
15 | ||
16 | #if defined(BOOST_HAS_PRAGMA_ONCE) | |
17 | # pragma once | |
18 | #endif | |
19 | ||
20 | namespace boost { | |
21 | namespace intrusive { | |
22 | ||
23 | //!This enumeration defines the type of value_traits that can be defined | |
24 | //!for Boost.Intrusive containers | |
25 | enum link_mode_type{ | |
26 | //!If this linking policy is specified in a value_traits class | |
27 | //!as the link_mode, containers | |
28 | //!configured with such value_traits won't set the hooks | |
29 | //!of the erased values to a default state. Containers also won't | |
30 | //!check that the hooks of the new values are default initialized. | |
31 | normal_link, | |
32 | ||
33 | //!If this linking policy is specified in a value_traits class | |
34 | //!as the link_mode, containers | |
35 | //!configured with such value_traits will set the hooks | |
36 | //!of the erased values to a default state. Containers also will | |
37 | //!check that the hooks of the new values are default initialized. | |
38 | safe_link, | |
39 | ||
40 | //!Same as "safe_link" but the user type is an auto-unlink | |
41 | //!type, so the containers with constant-time size features won't be | |
42 | //!compatible with value_traits configured with this policy. | |
43 | //!Containers also know that the a value can be silently erased from | |
44 | //!the container without using any function provided by the containers. | |
45 | auto_unlink | |
46 | }; | |
47 | ||
48 | #ifndef BOOST_INTRUSIVE_DOXYGEN_INVOKED | |
49 | ||
50 | template <link_mode_type link_mode> | |
51 | struct is_safe_autounlink | |
52 | { | |
53 | static const bool value = | |
54 | (int)link_mode == (int)auto_unlink || | |
55 | (int)link_mode == (int)safe_link; | |
56 | }; | |
57 | ||
58 | #endif //BOOST_INTRUSIVE_DOXYGEN_INVOKED | |
59 | ||
60 | } //namespace intrusive | |
61 | } //namespace boost | |
62 | ||
63 | #endif //BOOST_INTRUSIVE_LINK_MODE_HPP |