1 //  (C) Copyright Gennadiy Rozental 2005-2014.
2 //  Distributed under the Boost Software License, Version 1.0.
3 //  (See accompanying file LICENSE_1_0.txt or copy at
4 //  http://www.boost.org/LICENSE_1_0.txt)
5 
6 //  See http://www.boost.org/libs/test for the library home page.
7 //
8 //  File        : $RCSfile$
9 //
10 //  Version     : $Revision$
11 //
12 //  Description : simple helpers for creating cusom output manipulators
13 // ***************************************************************************
14 
15 #ifndef BOOST_TEST_UTILS_TRIVIAL_SIGNLETON_HPP
16 #define BOOST_TEST_UTILS_TRIVIAL_SIGNLETON_HPP
17 
18 // Boost.Test
19 #include <boost/config.hpp>
20 #include <boost/detail/workaround.hpp>
21 
22 // Boost
23 #include <boost/test/detail/suppress_warnings.hpp>
24 
25 //____________________________________________________________________________//
26 
27 namespace boost {
28 namespace unit_test {
29 
30 // ************************************************************************** //
31 // **************                   singleton                  ************** //
32 // ************************************************************************** //
33 
34 template<typename Derived>
35 class singleton {
36 public:
instance()37     static Derived& instance() { static Derived the_inst; return the_inst; }
38 
39     BOOST_DELETED_FUNCTION(singleton(singleton const&))
40     BOOST_DELETED_FUNCTION(singleton& operator=(singleton const&))
41 
42 protected:
43     BOOST_DEFAULTED_FUNCTION(singleton(), {})
44     BOOST_DEFAULTED_FUNCTION(~singleton(), {})
45 };
46 
47 //____________________________________________________________________________//
48 
49 #define BOOST_TEST_SINGLETON_CONS( type )       \
50 friend class boost::unit_test::singleton<type>; \
51 type() {}                                       \
52 /**/
53 
54 #if BOOST_WORKAROUND(__DECCXX_VER, BOOST_TESTED_AT(60590042))
55 
56 #define BOOST_TEST_SINGLETON_INST( inst ) \
57 template class unit_test::singleton< BOOST_JOIN( inst, _t ) > ; \
58 namespace { BOOST_JOIN( inst, _t)& inst = BOOST_JOIN( inst, _t)::instance(); }
59 
60 #elif defined(__APPLE_CC__) && defined(__GNUC__) && __GNUC__ < 4
61 #define BOOST_TEST_SINGLETON_INST( inst ) \
62 static BOOST_JOIN( inst, _t)& inst = BOOST_JOIN (inst, _t)::instance();
63 
64 #else
65 
66 #define BOOST_TEST_SINGLETON_INST( inst ) \
67 namespace { BOOST_JOIN( inst, _t)& inst = BOOST_JOIN( inst, _t)::instance(); }
68 
69 #endif
70 
71 //____________________________________________________________________________//
72 
73 } // namespace unit_test
74 } // namespace boost
75 
76 
77 #include <boost/test/detail/enable_warnings.hpp>
78 
79 #endif // BOOST_TEST_UTILS_TRIVIAL_SIGNLETON_HPP
80