boost_optional 0.1.0

Boost C++ library boost_optional packaged using Zanbil
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152

// Copyright (C) 2017 Andrzej Krzemienski.
//
// Use, modification, and distribution is subject to the Boost Software
// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
// See http://www.boost.org/lib/optional for documentation.
//
// You are welcome to contact the author at:
//  akrzemi1@gmail.com

#include "boost/optional/optional.hpp"

#ifdef BOOST_BORLANDC
#pragma hdrstop
#endif

#include "boost/core/lightweight_test.hpp"
#include "boost/core/lightweight_test_trait.hpp"
#include "boost/type_traits/is_base_of.hpp"
#include "boost/optional/detail/experimental_traits.hpp"

#ifndef BOOST_OPTIONAL_DETAIL_NO_DEFAULTED_MOVE_FUNCTIONS

struct PrivDefault
{
  private: PrivDefault() {}
};

struct CustDefault
{
  CustDefault() {}
};

struct CustomizedTrivial
{
  CustomizedTrivial() {}
};

struct DeletedDefault
{
  BOOST_DELETED_FUNCTION(DeletedDefault())
};

namespace boost { namespace optional_config {

template <> struct optional_uses_direct_storage_for<CustomizedTrivial> : boost::true_type {};

}}

struct CustDtor
{
  ~CustDtor() {}
};

struct NoDefault
{
  explicit NoDefault(int) {}
};

struct Empty {};

template <typename T, typename U>
struct Aggregate { T t; U u; };

struct CustAssign
{
  CustAssign& operator=(CustAssign const&) { return *this; }
};

struct CustMove
{
  CustMove(CustMove &&) {}
};

void test_type_traits()
{
  // this only tests if type traits are implemented correctly
  BOOST_TEST_TRAIT_TRUE(( boost::optional_config::optional_uses_direct_storage_for<int> ));
  BOOST_TEST_TRAIT_TRUE(( boost::optional_config::optional_uses_direct_storage_for<double> ));

  BOOST_TEST_TRAIT_TRUE(( boost::optional_config::optional_uses_direct_storage_for<CustomizedTrivial> ));

  BOOST_TEST_TRAIT_FALSE(( boost::optional_config::optional_uses_direct_storage_for<PrivDefault> ));
  BOOST_TEST_TRAIT_FALSE(( boost::optional_config::optional_uses_direct_storage_for<NoDefault> ));
  BOOST_TEST_TRAIT_FALSE(( boost::optional_config::optional_uses_direct_storage_for<CustDefault> ));
  BOOST_TEST_TRAIT_FALSE(( boost::optional_config::optional_uses_direct_storage_for<Aggregate<int, CustDefault> > ));

  BOOST_TEST_TRAIT_FALSE(( boost::optional_config::optional_uses_direct_storage_for<CustDtor> ));
  BOOST_TEST_TRAIT_FALSE(( boost::optional_config::optional_uses_direct_storage_for<CustAssign> ));
  BOOST_TEST_TRAIT_FALSE(( boost::optional_config::optional_uses_direct_storage_for<CustMove> ));
  BOOST_TEST_TRAIT_FALSE(( boost::optional_config::optional_uses_direct_storage_for<Aggregate<int, CustMove> > ));

  BOOST_TEST_TRAIT_TRUE(( boost::optional_detail::is_trivially_semiregular<int> ));
  BOOST_TEST_TRAIT_TRUE(( boost::optional_detail::is_trivially_semiregular<double> ));


#ifndef BOOST_OPTIONAL_DETAIL_NO_SPEC_FOR_TRIVIAL_TYPES
  BOOST_TEST_TRAIT_TRUE(( boost::optional_config::optional_uses_direct_storage_for<Empty> ));
  BOOST_TEST_TRAIT_TRUE(( boost::optional_config::optional_uses_direct_storage_for<Aggregate<int, double> > ));
  BOOST_TEST_TRAIT_TRUE(( boost::optional_config::optional_uses_direct_storage_for<Aggregate<Aggregate<Empty, int>, double> > ));

  BOOST_TEST_TRAIT_TRUE(( boost::optional_detail::is_trivially_semiregular<Empty> ));
  BOOST_TEST_TRAIT_TRUE(( boost::optional_detail::is_trivially_semiregular<Aggregate<int, double> > ));
  BOOST_TEST_TRAIT_TRUE(( boost::optional_detail::is_trivially_semiregular<Aggregate<Aggregate<Empty, int>, double> > ));

  BOOST_TEST_TRAIT_TRUE(( boost::optional_detail::is_trivially_semiregular<PrivDefault> ));
  BOOST_TEST_TRAIT_TRUE(( boost::optional_detail::is_trivially_semiregular<NoDefault> ));
  BOOST_TEST_TRAIT_TRUE(( boost::optional_detail::is_trivially_semiregular<CustDefault> ));
  BOOST_TEST_TRAIT_TRUE(( boost::optional_detail::is_trivially_semiregular<Aggregate<int, CustDefault> > ));
  BOOST_TEST_TRAIT_TRUE(( boost::optional_detail::is_trivially_semiregular<DeletedDefault> ));
  BOOST_TEST_TRAIT_TRUE(( boost::optional_detail::is_trivially_semiregular<Aggregate<int, DeletedDefault> > ));
#endif

  BOOST_TEST_TRAIT_FALSE(( boost::optional_config::optional_uses_direct_storage_for<DeletedDefault> ));
  BOOST_TEST_TRAIT_FALSE(( boost::optional_config::optional_uses_direct_storage_for<Aggregate<int, DeletedDefault> > ));

  BOOST_TEST_TRAIT_FALSE(( boost::optional_detail::is_trivially_semiregular<CustDtor> ));
  BOOST_TEST_TRAIT_FALSE(( boost::optional_detail::is_trivially_semiregular<CustAssign> ));
  BOOST_TEST_TRAIT_FALSE(( boost::optional_detail::is_trivially_semiregular<CustMove> ));
  BOOST_TEST_TRAIT_FALSE(( boost::optional_detail::is_trivially_semiregular<Aggregate<int, CustMove> > ));
}

void test_trivial_copyability()
{
  BOOST_TEST_TRAIT_TRUE((boost::is_base_of<boost::optional_detail::tc_optional_base<int>, boost::optional<int> > ));
  BOOST_TEST_TRAIT_TRUE((boost::is_base_of<boost::optional_detail::tc_optional_base<double>, boost::optional<double> > ));
  BOOST_TEST_TRAIT_TRUE((boost::is_base_of<boost::optional_detail::tc_optional_base<CustomizedTrivial>, boost::optional<CustomizedTrivial> > ));
  BOOST_TEST_TRAIT_FALSE((boost::is_base_of<boost::optional_detail::tc_optional_base<DeletedDefault>, boost::optional<DeletedDefault> > ));

#ifndef BOOST_OPTIONAL_DETAIL_NO_SPEC_FOR_TRIVIAL_TYPES
  BOOST_TEST_TRAIT_TRUE(( boost::optional_detail::is_trivially_semiregular<boost::optional<int> > ));
  BOOST_TEST_TRAIT_TRUE(( boost::optional_detail::is_trivially_semiregular<boost::optional<double> > ));
  BOOST_TEST_TRAIT_TRUE(( boost::optional_detail::is_trivially_semiregular<boost::optional<CustomizedTrivial> > ));
  BOOST_TEST_TRAIT_TRUE(( boost::optional_detail::is_trivially_semiregular<boost::optional<Empty> > ));
  BOOST_TEST_TRAIT_TRUE(( boost::optional_detail::is_trivially_semiregular<boost::optional<Aggregate<int, double> > > ));
  BOOST_TEST_TRAIT_TRUE(( boost::optional_detail::is_trivially_semiregular<boost::optional<Aggregate<Aggregate<Empty, int>, double> > > ));

  BOOST_TEST_TRAIT_FALSE(( boost::optional_detail::is_trivially_semiregular<boost::optional<DeletedDefault> > ));
#endif
}

#endif

int main()
{
#ifndef BOOST_OPTIONAL_DETAIL_NO_DEFAULTED_MOVE_FUNCTIONS
  test_type_traits();
  test_trivial_copyability();
#endif
  return boost::report_errors();
}