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1 | // Boost nil_generator.hpp header file ----------------------------------------------// |
2 | ||
3 | // Copyright 2010 Andy Tompkins. | |
4 | // Distributed under the Boost Software License, Version 1.0. (See | |
5 | // accompanying file LICENSE_1_0.txt or copy at | |
6 | // http://www.boost.org/LICENSE_1_0.txt) | |
7 | ||
8 | #ifndef BOOST_UUID_NIL_GENERATOR_HPP | |
9 | #define BOOST_UUID_NIL_GENERATOR_HPP | |
10 | ||
11 | #include <boost/uuid/uuid.hpp> | |
12 | ||
13 | namespace boost { | |
14 | namespace uuids { | |
15 | ||
16 | // generate a nil uuid | |
17 | struct nil_generator { | |
18 | typedef uuid result_type; | |
19 | ||
20 | uuid operator()() const { | |
21 | // initialize to all zeros | |
22 | uuid u = {{0}}; | |
23 | return u; | |
24 | } | |
25 | }; | |
26 | ||
27 | inline uuid nil_uuid() { | |
28 | return nil_generator()(); | |
29 | } | |
30 | ||
31 | }} // namespace boost::uuids | |
32 | ||
33 | #endif // BOOST_UUID_NIL_GENERATOR_HPP | |
34 |