1 // Copyright (C) 2017 Andrzej Krzemienski.
2 //
3 // Use, modification, and distribution is subject to the Boost Software
4 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
5 // http://www.boost.org/LICENSE_1_0.txt)
6 //
7 // See http://www.boost.org/lib/optional for documentation.
8 //
9 // You are welcome to contact the author at:
10 // akrzemi1@gmail.com
11
12 #include "boost/optional/optional.hpp"
13
14 #ifdef __BORLANDC__
15 #pragma hdrstop
16 #endif
17
18 #include "boost/core/lightweight_test.hpp"
19 #include "boost/core/lightweight_test_trait.hpp"
20 #include "boost/type_traits/is_base_of.hpp"
21 #include "boost/optional/detail/experimental_traits.hpp"
22
23 #ifndef BOOST_OPTIONAL_DETAIL_NO_DEFAULTED_MOVE_FUNCTIONS
24
25 struct PrivDefault
26 {
PrivDefaultPrivDefault27 private: PrivDefault() {}
28 };
29
30 struct CustDefault
31 {
CustDefaultCustDefault32 CustDefault() {}
33 };
34
35 struct CustomizedTrivial
36 {
CustomizedTrivialCustomizedTrivial37 CustomizedTrivial() {}
38 };
39
40 struct DeletedDefault
41 {
42 BOOST_DELETED_FUNCTION(DeletedDefault())
43 };
44
45 namespace boost { namespace optional_config {
46
47 template <> struct optional_uses_direct_storage_for<CustomizedTrivial> : boost::true_type {};
48
49 }}
50
51 struct CustDtor
52 {
~CustDtorCustDtor53 ~CustDtor() {}
54 };
55
56 struct NoDefault
57 {
NoDefaultNoDefault58 explicit NoDefault(int) {}
59 };
60
61 struct Empty {};
62
63 template <typename T, typename U>
64 struct Aggregate { T t; U u; };
65
66 struct CustAssign
67 {
operator =CustAssign68 CustAssign& operator=(CustAssign const&) { return *this; }
69 };
70
71 struct CustMove
72 {
CustMoveCustMove73 CustMove(CustMove &&) {}
74 };
75
test_type_traits()76 void test_type_traits()
77 {
78 // this only tests if type traits are implemented correctly
79 BOOST_TEST_TRAIT_TRUE(( boost::optional_config::optional_uses_direct_storage_for<int> ));
80 BOOST_TEST_TRAIT_TRUE(( boost::optional_config::optional_uses_direct_storage_for<double> ));
81
82 BOOST_TEST_TRAIT_TRUE(( boost::optional_config::optional_uses_direct_storage_for<CustomizedTrivial> ));
83
84 BOOST_TEST_TRAIT_FALSE(( boost::optional_config::optional_uses_direct_storage_for<PrivDefault> ));
85 BOOST_TEST_TRAIT_FALSE(( boost::optional_config::optional_uses_direct_storage_for<NoDefault> ));
86 BOOST_TEST_TRAIT_FALSE(( boost::optional_config::optional_uses_direct_storage_for<CustDefault> ));
87 BOOST_TEST_TRAIT_FALSE(( boost::optional_config::optional_uses_direct_storage_for<Aggregate<int, CustDefault> > ));
88
89 BOOST_TEST_TRAIT_FALSE(( boost::optional_config::optional_uses_direct_storage_for<CustDtor> ));
90 BOOST_TEST_TRAIT_FALSE(( boost::optional_config::optional_uses_direct_storage_for<CustAssign> ));
91 BOOST_TEST_TRAIT_FALSE(( boost::optional_config::optional_uses_direct_storage_for<CustMove> ));
92 BOOST_TEST_TRAIT_FALSE(( boost::optional_config::optional_uses_direct_storage_for<Aggregate<int, CustMove> > ));
93
94 BOOST_TEST_TRAIT_TRUE(( boost::optional_detail::is_type_trivially_copyable<int> ));
95 BOOST_TEST_TRAIT_TRUE(( boost::optional_detail::is_type_trivially_copyable<double> ));
96
97 BOOST_TEST_TRAIT_FALSE(( boost::optional_config::optional_uses_direct_storage_for<Empty> ));
98 BOOST_TEST_TRAIT_FALSE(( boost::optional_config::optional_uses_direct_storage_for<Aggregate<int, double> > ));
99 BOOST_TEST_TRAIT_FALSE(( boost::optional_config::optional_uses_direct_storage_for<Aggregate<Aggregate<Empty, int>, double> > ));
100 #ifndef BOOST_OPTIONAL_DETAIL_NO_SPEC_FOR_TRIVIAL_TYPES
101
102 BOOST_TEST_TRAIT_TRUE(( boost::optional_detail::is_type_trivially_copyable<Empty> ));
103 BOOST_TEST_TRAIT_TRUE(( boost::optional_detail::is_type_trivially_copyable<Aggregate<int, double> > ));
104 BOOST_TEST_TRAIT_TRUE(( boost::optional_detail::is_type_trivially_copyable<Aggregate<Aggregate<Empty, int>, double> > ));
105
106 #endif
107
108 BOOST_TEST_TRAIT_FALSE(( boost::optional_config::optional_uses_direct_storage_for<DeletedDefault> ));
109 BOOST_TEST_TRAIT_FALSE(( boost::optional_config::optional_uses_direct_storage_for<Aggregate<int, DeletedDefault> > ));
110
111 BOOST_TEST_TRAIT_FALSE(( boost::optional_detail::is_type_trivially_copyable<CustDtor> ));
112 BOOST_TEST_TRAIT_FALSE(( boost::optional_detail::is_type_trivially_copyable<CustAssign> ));
113 BOOST_TEST_TRAIT_FALSE(( boost::optional_detail::is_type_trivially_copyable<CustMove> ));
114 BOOST_TEST_TRAIT_FALSE(( boost::optional_detail::is_type_trivially_copyable<Aggregate<int, CustMove> > ));
115 }
116
test_trivial_copyability()117 void test_trivial_copyability()
118 {
119 BOOST_TEST_TRAIT_TRUE((boost::is_base_of<boost::optional_detail::tc_optional_base<int>, boost::optional<int> > ));
120 BOOST_TEST_TRAIT_TRUE((boost::is_base_of<boost::optional_detail::tc_optional_base<double>, boost::optional<double> > ));
121 BOOST_TEST_TRAIT_TRUE((boost::is_base_of<boost::optional_detail::tc_optional_base<CustomizedTrivial>, boost::optional<CustomizedTrivial> > ));
122 BOOST_TEST_TRAIT_FALSE((boost::is_base_of<boost::optional_detail::tc_optional_base<DeletedDefault>, boost::optional<DeletedDefault> > ));
123
124 #ifndef BOOST_OPTIONAL_DETAIL_NO_SPEC_FOR_TRIVIAL_TYPES
125 BOOST_TEST_TRAIT_TRUE(( boost::optional_detail::is_type_trivially_copyable<boost::optional<int> > ));
126 BOOST_TEST_TRAIT_TRUE(( boost::optional_detail::is_type_trivially_copyable<boost::optional<double> > ));
127 BOOST_TEST_TRAIT_TRUE(( boost::optional_detail::is_type_trivially_copyable<boost::optional<CustomizedTrivial> > ));
128
129 BOOST_TEST_TRAIT_FALSE(( boost::optional_detail::is_type_trivially_copyable<boost::optional<DeletedDefault> > ));
130 #endif
131
132 BOOST_TEST_TRAIT_FALSE(( boost::optional_detail::is_type_trivially_copyable<boost::optional<Empty> > ));
133 BOOST_TEST_TRAIT_FALSE(( boost::optional_detail::is_type_trivially_copyable<boost::optional<Aggregate<int, double> > > ));
134 BOOST_TEST_TRAIT_FALSE(( boost::optional_detail::is_type_trivially_copyable<boost::optional<Aggregate<Aggregate<Empty, int>, double> > > ));
135 }
136
137 #endif
138
main()139 int main()
140 {
141 #ifndef BOOST_OPTIONAL_DETAIL_NO_DEFAULTED_MOVE_FUNCTIONS
142 test_type_traits();
143 test_trivial_copyability();
144 #endif
145 return boost::report_errors();
146 }
147