4 * (c) 2008-2009 Alexander Warg <warg@os.inf.tu-dresden.de>,
5 * Torsten Frenzel <frenzel@os.inf.tu-dresden.de>
6 * economic rights: Technische Universität Dresden (Germany)
8 * This file is part of TUD:OS and distributed under the terms of the
9 * GNU General Public License 2.
10 * Please see the COPYING-GPL-2 file for details.
12 * As a special exception, you may use this file as part of a free software
13 * library without restriction. Specifically, if other files instantiate
14 * templates or use macros or inline functions from this file, or you compile
15 * this file and link it with other files to produce an executable, this
16 * file does not by itself cause the resulting executable to be covered by
17 * the GNU General Public License. This exception does not however
18 * invalidate any other reasons why the executable file might be covered by
19 * the GNU General Public License.
25 #pragma GCC system_header
27 #include "fiasco_defs.h"
31 template< typename T, T V >
32 struct integral_constant
34 static T const value = V;
36 typedef integral_constant<T, V> type;
39 typedef integral_constant<bool, true> true_type;
40 typedef integral_constant<bool, false> false_type;
42 template< typename T > struct remove_reference;
44 template< typename T > struct identity { typedef T type; };
46 template< typename T1, typename T2 > struct is_same;
48 template< typename T > struct remove_const;
50 template< typename T > struct remove_volatile;
52 template< typename T > struct remove_cv;
54 template< typename T > struct remove_pointer;
56 template< typename T > struct remove_extent;
58 template< typename T > struct remove_all_extents;
62 template< typename, typename >
63 struct is_same : false_type {};
65 template< typename T >
66 struct is_same<T, T> : true_type {};
68 template< typename T >
69 struct remove_reference { typedef T type; };
71 template< typename T >
72 struct remove_reference<T &> { typedef T type; };
74 template< typename T >
75 struct remove_reference<T &&> { typedef T type; };
78 template< typename T > struct remove_const { typedef T type; };
79 template< typename T > struct remove_const<T const> { typedef T type; };
81 template< typename T > struct remove_volatile { typedef T type; };
82 template< typename T > struct remove_volatile<T volatile> { typedef T type; };
84 template< typename T >
85 struct remove_cv { typedef typename remove_const<typename remove_volatile<T>::type>::type type; };
87 template< typename T, typename >
88 struct __remove_pointer_h { typedef T type; };
90 template< typename T, typename I >
91 struct __remove_pointer_h<T, I*> { typedef I type; };
93 template< typename T >
94 struct remove_pointer : __remove_pointer_h<T, typename remove_cv<T>::type> {};
97 template< typename T >
98 struct remove_extent { typedef T type; };
100 template< typename T >
101 struct remove_extent<T[]> { typedef T type; };
103 template< typename T, unsigned long N >
104 struct remove_extent<T[N]> { typedef T type; };
106 template< typename T >
107 struct remove_all_extents { typedef T type; };
109 template< typename T >
110 struct remove_all_extents<T[]> { typedef typename remove_all_extents<T>::type type; };
112 template< typename T, unsigned long N >
113 struct remove_all_extents<T[N]> { typedef typename remove_all_extents<T>::type type; };
115 template< typename T >
117 forward(typename cxx::remove_reference<T>::type &t)
118 { return static_cast<T &&>(t); }
120 template< typename T >
122 forward(typename cxx::remove_reference<T>::type &&t)
123 { return static_cast<T &&>(t); }
125 template< typename T >
126 inline typename cxx::remove_reference<T>::type &&
127 move(T &t) { return static_cast<typename cxx::remove_reference<T>::type &&>(t); }
129 template< bool, typename T = void >
132 template< typename T >
133 struct enable_if<true, T> { typedef T type; };
135 template< typename T >
136 struct is_const : false_type {};
138 template< typename T >
139 struct is_const<T const> : true_type {};
141 template< typename T >
142 struct is_volatile : false_type {};
144 template< typename T >
145 struct is_volatile<T volatile> : true_type {};
147 template< typename T >
148 struct is_pointer : false_type {};
150 template< typename T >
151 struct is_pointer<T *> : true_type {};
153 template< bool, typename, typename >
156 template< bool C, typename T_TRUE, typename T_FALSE >
157 struct conditional { typedef T_TRUE type; };
159 template< typename T_TRUE, typename T_FALSE >
160 struct conditional< false, T_TRUE, T_FALSE > { typedef T_FALSE type; };
163 struct is_enum : integral_constant<bool, __is_enum(T)> {};
166 template< typename T > struct is_integral : false_type {};
168 template<> struct is_integral<bool> : true_type {};
170 template<> struct is_integral<char> : true_type {};
171 template<> struct is_integral<signed char> : true_type {};
172 template<> struct is_integral<unsigned char> : true_type {};
173 template<> struct is_integral<short> : true_type {};
174 template<> struct is_integral<unsigned short> : true_type {};
175 template<> struct is_integral<int> : true_type {};
176 template<> struct is_integral<unsigned int> : true_type {};
177 template<> struct is_integral<long> : true_type {};
178 template<> struct is_integral<unsigned long> : true_type {};
179 template<> struct is_integral<long long> : true_type {};
180 template<> struct is_integral<unsigned long long> : true_type {};
182 template< typename T, bool = is_integral<T>::value || is_enum<T>::value >
183 struct __is_signed_helper : integral_constant<bool, static_cast<bool>(T(-1) < T(0))> {};
185 template< typename T >
186 struct __is_signed_helper<T, false> : integral_constant<bool, false> {};
188 template< typename T >
189 struct is_signed : __is_signed_helper<T> {};
193 struct is_array : false_type {};
195 template< typename T >
196 struct is_array<T[]> : true_type {};
198 template< typename T, unsigned long N >
199 struct is_array<T[N]> : true_type {};
202 template< int SIZE, bool SIGN = false, bool = true > struct int_type_for_size;
204 template<> struct int_type_for_size<sizeof(char), true, true>
205 { typedef signed char type; };
207 template<> struct int_type_for_size<sizeof(char), false, true>
208 { typedef unsigned char type; };
210 template<> struct int_type_for_size<sizeof(short), true, (sizeof(short) > sizeof(char))>
211 { typedef short type; };
213 template<> struct int_type_for_size<sizeof(short), false, (sizeof(short) > sizeof(char))>
214 { typedef unsigned short type; };
216 template<> struct int_type_for_size<sizeof(int), true, (sizeof(int) > sizeof(short))>
217 { typedef int type; };
219 template<> struct int_type_for_size<sizeof(int), false, (sizeof(int) > sizeof(short))>
220 { typedef unsigned int type; };
222 template<> struct int_type_for_size<sizeof(long), true, (sizeof(long) > sizeof(int))>
223 { typedef long type; };
225 template<> struct int_type_for_size<sizeof(long), false, (sizeof(long) > sizeof(int))>
226 { typedef unsigned long type; };
228 template<> struct int_type_for_size<sizeof(long long), true, (sizeof(long long) > sizeof(long))>
229 { typedef long long type; };
231 template<> struct int_type_for_size<sizeof(long long), false, (sizeof(long long) > sizeof(long))>
232 { typedef unsigned long long type; };
234 template< typename T, class Enable = void > struct underlying_type {};
236 template< typename T >
237 struct underlying_type<T, typename enable_if<is_enum<T>::value>::type >
239 typedef typename int_type_for_size<sizeof(T), is_signed<T>::value>::type type;
242 template< typename T > struct make_signed;
243 template<> struct make_signed<char> { typedef signed char type; };
244 template<> struct make_signed<unsigned char> { typedef signed char type; };
245 template<> struct make_signed<signed char> { typedef signed char type; };
246 template<> struct make_signed<unsigned int> { typedef signed int type; };
247 template<> struct make_signed<signed int> { typedef signed int type; };
248 template<> struct make_signed<unsigned long int> { typedef signed long int type; };
249 template<> struct make_signed<signed long int> { typedef signed long int type; };
250 template<> struct make_signed<unsigned long long int> { typedef signed long long int type; };
251 template<> struct make_signed<signed long long int> { typedef signed long long int type; };
253 template< typename T > struct make_unsigned;
254 template<> struct make_unsigned<char> { typedef unsigned char type; };
255 template<> struct make_unsigned<unsigned char> { typedef unsigned char type; };
256 template<> struct make_unsigned<signed char> { typedef unsigned char type; };
257 template<> struct make_unsigned<unsigned int> { typedef unsigned int type; };
258 template<> struct make_unsigned<signed int> { typedef unsigned int type; };
259 template<> struct make_unsigned<unsigned long int> { typedef unsigned long int type; };
260 template<> struct make_unsigned<signed long int> { typedef unsigned long int type; };
261 template<> struct make_unsigned<unsigned long long int> { typedef unsigned long long int type; };
262 template<> struct make_unsigned<signed long long int> { typedef unsigned long long int type; };
265 template<typename From, typename To>
266 struct is_convertible
269 struct _true { char x[2]; };
272 static _true _helper(To const *);
273 static _false _helper(...);
277 value = sizeof(_true) == sizeof(_helper(static_cast<From*>(0)))
281 typedef bool value_type;