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1 | /* concepts.hpp |
2 | * | |
3 | * Copyright Steven Watanabe 2011 | |
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 | * $Id$ | |
9 | * | |
10 | */ | |
11 | ||
12 | #ifndef BOOST_RANDOM_TEST_CONCEPTS_HPP | |
13 | #define BOOST_RANDOM_TEST_CONCEPTS_HPP | |
14 | ||
15 | #include <boost/config.hpp> | |
16 | ||
17 | #ifdef BOOST_MSVC | |
18 | #pragma warning(push) | |
19 | #pragma warning(disable:4100) | |
20 | #endif | |
21 | ||
22 | #include <boost/concept_check.hpp> | |
23 | ||
24 | #ifdef BOOST_MSVC | |
25 | #pragma warning(pop) | |
26 | #endif | |
27 | ||
28 | #include <boost/concept_archetype.hpp> | |
29 | #include <boost/concept/requires.hpp> | |
30 | #include <boost/mpl/assert.hpp> | |
31 | #include <boost/type_traits/is_arithmetic.hpp> | |
32 | #include <boost/type_traits/is_integral.hpp> | |
33 | #include <boost/type_traits/is_same.hpp> | |
34 | #include <boost/cstdint.hpp> | |
35 | #include <boost/static_assert.hpp> | |
36 | #include <istream> | |
37 | #include <ostream> | |
38 | ||
39 | #ifdef BOOST_MSVC | |
40 | #pragma warning(push) | |
41 | #pragma warning(disable:4510) | |
42 | #pragma warning(disable:4610) | |
43 | #endif | |
44 | ||
45 | namespace boost { | |
46 | namespace random { | |
47 | namespace test { | |
48 | ||
49 | template<class Base = null_archetype<> > | |
50 | struct seed_seq_archetype : Base | |
51 | { | |
52 | template<class Iter> | |
53 | BOOST_CONCEPT_REQUIRES( | |
54 | ((Mutable_RandomAccessIterator<Iter>)) | |
55 | ((UnsignedInteger<typename Mutable_RandomAccessIterator<Iter>::value_type>)), | |
56 | (void)) | |
57 | generate(Iter, Iter) {} | |
58 | }; | |
59 | ||
60 | template<class R = unsigned, class Base = null_archetype<> > | |
61 | struct uniform_random_number_generator_archetype : Base | |
62 | { | |
63 | typedef R result_type; | |
64 | static R min BOOST_PREVENT_MACRO_SUBSTITUTION () { return 0; } | |
65 | static R max BOOST_PREVENT_MACRO_SUBSTITUTION () { return 0; } | |
66 | R operator()() { return 0; } | |
67 | }; | |
68 | ||
69 | template<class SSeq> | |
70 | struct SeedSeq | |
71 | { | |
72 | public: | |
73 | BOOST_CONCEPT_USAGE(SeedSeq) | |
74 | { | |
75 | q.generate(rb, re); | |
76 | } | |
77 | private: | |
78 | SSeq q; | |
79 | mutable_random_access_iterator_archetype<boost::uint32_t> rb, re; | |
80 | }; | |
81 | ||
82 | template<class T> | |
83 | struct Streamable | |
84 | { | |
85 | public: | |
86 | BOOST_CONCEPT_USAGE(Streamable) | |
87 | { | |
88 | os << x; | |
89 | is >> v; | |
90 | wos << x; | |
91 | wis >> v; | |
92 | } | |
93 | private: | |
94 | const T x; | |
95 | T v; | |
96 | ||
97 | std::istream is; | |
98 | std::ostream os; | |
99 | std::wistream wis; | |
100 | std::wostream wos; | |
101 | }; | |
102 | ||
103 | // Type deduction will fail unless the arguments have the same type. | |
104 | template <typename T> | |
105 | void same_type(T const&, T const&) {} | |
106 | ||
107 | template <class E> | |
108 | struct RandomNumberEngine : | |
109 | DefaultConstructible<E>, | |
110 | CopyConstructible<E>, | |
111 | Assignable<E>, | |
112 | EqualityComparable<E>, | |
113 | Streamable<E> | |
114 | { | |
115 | public: | |
116 | typedef typename E::result_type result_type; | |
117 | ||
118 | // relaxed from the standard | |
119 | BOOST_MPL_ASSERT((boost::is_arithmetic<result_type>)); | |
120 | ||
121 | // backwards compatibility check | |
122 | BOOST_STATIC_ASSERT(!E::has_fixed_range); | |
123 | ||
124 | // a generator can be used to seed another generator (extension) | |
125 | BOOST_CONCEPT_ASSERT((SeedSeq<E>)); | |
126 | ||
127 | BOOST_CONCEPT_USAGE(RandomNumberEngine) | |
128 | { | |
129 | same_type(e(), result_type()); | |
130 | same_type((E::min)(), result_type()); | |
131 | same_type((E::max)(), result_type()); | |
132 | ||
133 | (void)E(); | |
134 | (void)E(s); | |
135 | (void)E(q); | |
136 | ||
137 | e.seed(); | |
138 | e.seed(s); | |
139 | e.seed(q); | |
140 | ||
141 | e.discard(z); | |
142 | ||
143 | // extension | |
144 | (void)E(sb, se); | |
145 | e.seed(sb, se); | |
146 | } | |
147 | ||
148 | private: | |
149 | E e; | |
150 | E v; | |
151 | const E x; | |
152 | seed_seq_archetype<> q; | |
153 | typename detail::seed_type<result_type>::type s; | |
11fdf7f2 | 154 | uintmax_t z; |
7c673cae FG |
155 | |
156 | input_iterator_archetype<boost::uint32_t> sb, se; | |
157 | }; | |
158 | ||
159 | template<class D> | |
160 | struct RandomNumberDistribution : | |
161 | DefaultConstructible<D>, | |
162 | CopyConstructible<D>, | |
163 | Assignable<D>, | |
164 | EqualityComparable<D>, | |
165 | Streamable<D> | |
166 | { | |
167 | public: | |
168 | typedef typename D::result_type result_type; | |
169 | typedef typename D::param_type param_type; | |
170 | // backwards compatibility | |
171 | typedef typename D::input_type input_type; | |
172 | ||
173 | typedef param_type P; | |
174 | ||
175 | BOOST_CONCEPT_ASSERT((DefaultConstructible<P>)); | |
176 | BOOST_CONCEPT_ASSERT((CopyConstructible<P>)); | |
177 | BOOST_CONCEPT_ASSERT((Assignable<P>)); | |
178 | BOOST_CONCEPT_ASSERT((EqualityComparable<P>)); | |
179 | BOOST_CONCEPT_ASSERT((Streamable<P>)); | |
180 | ||
181 | BOOST_MPL_ASSERT((boost::is_same<typename P::distribution_type, D>)); | |
182 | ||
183 | BOOST_CONCEPT_USAGE(RandomNumberDistribution) | |
184 | { | |
185 | (void)D(p); | |
186 | d.reset(); | |
187 | same_type(x.param(), p); | |
188 | d.param(p); | |
189 | same_type(d(g), result_type()); | |
190 | same_type(d(g, p), result_type()); | |
191 | same_type((x.min)(), result_type()); | |
192 | same_type((x.max)(), result_type()); | |
193 | } | |
194 | ||
195 | private: | |
196 | D d; | |
197 | const D x; | |
198 | const P p; | |
199 | uniform_random_number_generator_archetype<> g; | |
200 | }; | |
201 | ||
202 | } | |
203 | } | |
204 | } | |
205 | ||
206 | #ifdef BOOST_MSVC | |
207 | #pragma warning(pop) | |
208 | #endif | |
209 | ||
210 | #endif |