1 | /* |
---|
2 | * Copyright (c) 2001-2003 Joel de Guzman |
---|
3 | * |
---|
4 | * Use, modification and distribution is subject to the Boost Software |
---|
5 | * License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
---|
6 | * http://www.boost.org/LICENSE_1_0.txt) |
---|
7 | */ |
---|
8 | #ifndef _BOOST_UBLAS_NUMERICTYPE_DEDUCTION_ |
---|
9 | #define _BOOST_UBLAS_NUMERICTYPE_DEDUCTION_ |
---|
10 | |
---|
11 | // See original in boost-sandbox/boost/utility/type_deduction.hpp for comments |
---|
12 | |
---|
13 | #include <boost/mpl/vector/vector20.hpp> |
---|
14 | #include <boost/mpl/at.hpp> |
---|
15 | #include <boost/mpl/or.hpp> |
---|
16 | #include <boost/mpl/identity.hpp> |
---|
17 | #include <boost/type_traits/remove_cv.hpp> |
---|
18 | #include <boost/type_traits/is_same.hpp> |
---|
19 | #include <boost/utility/enable_if.hpp> |
---|
20 | |
---|
21 | namespace boost { namespace numeric { namespace ublas { |
---|
22 | |
---|
23 | struct error_cant_deduce_type {}; |
---|
24 | |
---|
25 | namespace type_deduction_detail |
---|
26 | { |
---|
27 | typedef char(&bool_value_type)[1]; |
---|
28 | typedef char(&float_value_type)[2]; |
---|
29 | typedef char(&double_value_type)[3]; |
---|
30 | typedef char(&long_double_value_type)[4]; |
---|
31 | typedef char(&char_value_type)[5]; |
---|
32 | typedef char(&schar_value_type)[6]; |
---|
33 | typedef char(&uchar_value_type)[7]; |
---|
34 | typedef char(&short_value_type)[8]; |
---|
35 | typedef char(&ushort_value_type)[9]; |
---|
36 | typedef char(&int_value_type)[10]; |
---|
37 | typedef char(&uint_value_type)[11]; |
---|
38 | typedef char(&long_value_type)[12]; |
---|
39 | typedef char(&ulong_value_type)[13]; |
---|
40 | |
---|
41 | typedef char(&x_value_type)[14]; |
---|
42 | typedef char(&y_value_type)[15]; |
---|
43 | |
---|
44 | typedef char(&cant_deduce_type)[16]; |
---|
45 | |
---|
46 | template <typename T, typename PlainT = typename remove_cv<T>::type> |
---|
47 | struct is_basic |
---|
48 | : mpl::or_< |
---|
49 | typename mpl::or_< |
---|
50 | is_same<PlainT, bool> |
---|
51 | , is_same<PlainT, float> |
---|
52 | , is_same<PlainT, double> |
---|
53 | , is_same<PlainT, long double> |
---|
54 | > ::type, |
---|
55 | typename mpl::or_< |
---|
56 | is_same<PlainT, char> |
---|
57 | , is_same<PlainT, signed char> |
---|
58 | , is_same<PlainT, unsigned char> |
---|
59 | , is_same<PlainT, short> |
---|
60 | , is_same<PlainT, unsigned short> |
---|
61 | > ::type, |
---|
62 | typename mpl::or_< |
---|
63 | is_same<PlainT, int> |
---|
64 | , is_same<PlainT, unsigned int> |
---|
65 | , is_same<PlainT, long> |
---|
66 | , is_same<PlainT, unsigned long> |
---|
67 | > ::type |
---|
68 | > {}; |
---|
69 | |
---|
70 | struct asymmetric; |
---|
71 | |
---|
72 | template <typename X, typename Y> |
---|
73 | cant_deduce_type |
---|
74 | test(...); // The black hole !!! |
---|
75 | |
---|
76 | template <typename X, typename Y> |
---|
77 | bool_value_type |
---|
78 | test(bool const&); |
---|
79 | |
---|
80 | template <typename X, typename Y> |
---|
81 | float_value_type |
---|
82 | test(float const&); |
---|
83 | |
---|
84 | template <typename X, typename Y> |
---|
85 | double_value_type |
---|
86 | test(double const&); |
---|
87 | |
---|
88 | template <typename X, typename Y> |
---|
89 | long_double_value_type |
---|
90 | test(long double const&); |
---|
91 | |
---|
92 | template <typename X, typename Y> |
---|
93 | char_value_type |
---|
94 | test(char const&); |
---|
95 | |
---|
96 | template <typename X, typename Y> |
---|
97 | schar_value_type |
---|
98 | test(signed char const&); |
---|
99 | |
---|
100 | template <typename X, typename Y> |
---|
101 | uchar_value_type |
---|
102 | test(unsigned char const&); |
---|
103 | |
---|
104 | template <typename X, typename Y> |
---|
105 | short_value_type |
---|
106 | test(short const&); |
---|
107 | |
---|
108 | template <typename X, typename Y> |
---|
109 | ushort_value_type |
---|
110 | test(unsigned short const&); |
---|
111 | |
---|
112 | template <typename X, typename Y> |
---|
113 | int_value_type |
---|
114 | test(int const&); |
---|
115 | |
---|
116 | template <typename X, typename Y> |
---|
117 | uint_value_type |
---|
118 | test(unsigned int const&); |
---|
119 | |
---|
120 | template <typename X, typename Y> |
---|
121 | long_value_type |
---|
122 | test(long const&); |
---|
123 | |
---|
124 | template <typename X, typename Y> |
---|
125 | ulong_value_type |
---|
126 | test(unsigned long const&); |
---|
127 | |
---|
128 | template <typename X, typename Y> |
---|
129 | typename disable_if< |
---|
130 | is_basic<X>, x_value_type |
---|
131 | >::type |
---|
132 | test(X const&); |
---|
133 | |
---|
134 | template <typename X, typename Y> |
---|
135 | typename disable_if< |
---|
136 | mpl::or_< |
---|
137 | is_basic<Y> |
---|
138 | , is_same<Y, asymmetric> |
---|
139 | , is_same<const X, const Y> |
---|
140 | > |
---|
141 | , y_value_type |
---|
142 | >::type |
---|
143 | test(Y const&); |
---|
144 | |
---|
145 | template <typename X, typename Y> |
---|
146 | struct base_result_of |
---|
147 | { |
---|
148 | typedef typename remove_cv<X>::type x_type; |
---|
149 | typedef typename remove_cv<Y>::type y_type; |
---|
150 | |
---|
151 | typedef mpl::vector16< |
---|
152 | mpl::identity<bool> |
---|
153 | , mpl::identity<float> |
---|
154 | , mpl::identity<double> |
---|
155 | , mpl::identity<long double> |
---|
156 | , mpl::identity<char> |
---|
157 | , mpl::identity<signed char> |
---|
158 | , mpl::identity<unsigned char> |
---|
159 | , mpl::identity<short> |
---|
160 | , mpl::identity<unsigned short> |
---|
161 | , mpl::identity<int> |
---|
162 | , mpl::identity<unsigned int> |
---|
163 | , mpl::identity<long> |
---|
164 | , mpl::identity<unsigned long> |
---|
165 | , mpl::identity<x_type> |
---|
166 | , mpl::identity<y_type> |
---|
167 | , mpl::identity<error_cant_deduce_type> |
---|
168 | > |
---|
169 | types; |
---|
170 | }; |
---|
171 | |
---|
172 | }}} } // namespace boost::numeric::ublas ::type_deduction_detail |
---|
173 | |
---|
174 | #endif |
---|