1/* boost random/detail/seed.hpp header file
2 *
3 * Copyright Steven Watanabe 2009
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 * See http://www.boost.org for most recent version including documentation.
9 *
10 * $Id$
11 */
12
13#ifndef BOOST_RANDOM_DETAIL_SEED_HPP
14#define BOOST_RANDOM_DETAIL_SEED_HPP
15
16#include <boost/config.hpp>
17
18// Sun seems to have trouble with the use of SFINAE for the
19// templated constructor. So does Borland.
20#if !defined(BOOST_NO_SFINAE) && !defined(__SUNPRO_CC) && !defined(__BORLANDC__)
21
22#include <boost/utility/enable_if.hpp>
23#include <boost/type_traits/is_arithmetic.hpp>
24#include <boost/mpl/bool.hpp>
25
26namespace boost {
27namespace random {
28namespace detail {
29
30template<class T>
31struct disable_seed : boost::disable_if<boost::is_arithmetic<T> > {};
32
33template<class Engine, class T>
34struct disable_constructor : disable_seed<T> {};
35
36template<class Engine>
37struct disable_constructor<Engine, Engine> {};
38
39#define BOOST_RANDOM_DETAIL_GENERATOR_CONSTRUCTOR(Self, Generator, gen) \
40 template<class Generator> \
41 explicit Self(Generator& gen, typename ::boost::random::detail::disable_constructor<Self, Generator>::type* = 0)
42
43#define BOOST_RANDOM_DETAIL_GENERATOR_SEED(Self, Generator, gen) \
44 template<class Generator> \
45 void seed(Generator& gen, typename ::boost::random::detail::disable_seed<Generator>::type* = 0)
46
47#define BOOST_RANDOM_DETAIL_SEED_SEQ_CONSTRUCTOR(Self, SeedSeq, seq) \
48 template<class SeedSeq> \
49 explicit Self(SeedSeq& seq, typename ::boost::random::detail::disable_constructor<Self, SeedSeq>::type* = 0)
50
51#define BOOST_RANDOM_DETAIL_SEED_SEQ_SEED(Self, SeedSeq, seq) \
52 template<class SeedSeq> \
53 void seed(SeedSeq& seq, typename ::boost::random::detail::disable_seed<SeedSeq>::type* = 0)
54
55#define BOOST_RANDOM_DETAIL_ARITHMETIC_CONSTRUCTOR(Self, T, x) \
56 explicit Self(const T& x)
57
58#define BOOST_RANDOM_DETAIL_ARITHMETIC_SEED(Self, T, x) \
59 void seed(const T& x)
60}
61}
62}
63
64#else
65
66#include <boost/type_traits/is_arithmetic.hpp>
67#include <boost/mpl/bool.hpp>
68
69#define BOOST_RANDOM_DETAIL_GENERATOR_CONSTRUCTOR(Self, Generator, gen) \
70 Self(Self& other) { *this = other; } \
71 Self(const Self& other) { *this = other; } \
72 template<class Generator> \
73 explicit Self(Generator& gen) { \
74 boost_random_constructor_impl(gen, ::boost::is_arithmetic<Generator>());\
75 } \
76 template<class Generator> \
77 void boost_random_constructor_impl(Generator& gen, ::boost::mpl::false_)
78
79#define BOOST_RANDOM_DETAIL_GENERATOR_SEED(Self, Generator, gen) \
80 template<class Generator> \
81 void seed(Generator& gen) { \
82 boost_random_seed_impl(gen, ::boost::is_arithmetic<Generator>());\
83 }\
84 template<class Generator>\
85 void boost_random_seed_impl(Generator& gen, ::boost::mpl::false_)
86
87#define BOOST_RANDOM_DETAIL_SEED_SEQ_CONSTRUCTOR(Self, SeedSeq, seq) \
88 Self(Self& other) { *this = other; } \
89 Self(const Self& other) { *this = other; } \
90 template<class SeedSeq> \
91 explicit Self(SeedSeq& seq) { \
92 boost_random_constructor_impl(seq, ::boost::is_arithmetic<SeedSeq>());\
93 } \
94 template<class SeedSeq> \
95 void boost_random_constructor_impl(SeedSeq& seq, ::boost::mpl::false_)
96
97#define BOOST_RANDOM_DETAIL_SEED_SEQ_SEED(Self, SeedSeq, seq) \
98 template<class SeedSeq> \
99 void seed(SeedSeq& seq) { \
100 boost_random_seed_impl(seq, ::boost::is_arithmetic<SeedSeq>()); \
101 } \
102 template<class SeedSeq> \
103 void boost_random_seed_impl(SeedSeq& seq, ::boost::mpl::false_)
104
105#define BOOST_RANDOM_DETAIL_ARITHMETIC_CONSTRUCTOR(Self, T, x) \
106 explicit Self(const T& x) { boost_random_constructor_impl(x, ::boost::mpl::true_()); }\
107 void boost_random_constructor_impl(const T& x, ::boost::mpl::true_)
108
109#define BOOST_RANDOM_DETAIL_ARITHMETIC_SEED(Self, T, x) \
110 void seed(const T& x) { boost_random_seed_impl(x, ::boost::mpl::true_()); }\
111 void boost_random_seed_impl(const T& x, ::boost::mpl::true_)
112
113#endif
114
115#endif
116