1// (C) Copyright Gennadiy Rozental 2001.
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
27namespace boost {
28namespace unit_test {
29
30// ************************************************************************** //
31// ************** singleton ************** //
32// ************************************************************************** //
33
34template<typename Derived>
35class singleton {
36public:
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
42protected:
43 BOOST_DEFAULTED_FUNCTION(singleton(), {})
44 BOOST_DEFAULTED_FUNCTION(~singleton(), {})
45};
46
47//____________________________________________________________________________//
48
49#define BOOST_TEST_SINGLETON_CONS( type ) \
50friend class boost::unit_test::singleton<type>; \
51type() {} \
52/**/
53
54#if BOOST_WORKAROUND(__DECCXX_VER, BOOST_TESTED_AT(60590042))
55
56#define BOOST_TEST_SINGLETON_INST( inst ) \
57template class unit_test::singleton< BOOST_JOIN( inst, _t ) > ; \
58namespace { 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 ) \
62static BOOST_JOIN( inst, _t)& inst = BOOST_JOIN (inst, _t)::instance();
63
64#else
65
66#define BOOST_TEST_SINGLETON_INST( inst ) \
67namespace { 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