--- /dev/null
+// TR1 type_traits -*- C++ -*-
+
+// Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
+
+/** @file tr1_impl/type_traits
+* This is an internal header file, included by other library headers.
+* You should not attempt to use it directly.
+*/
+
+namespace std
+{
+_GLIBCXX_BEGIN_NAMESPACE_TR1
+
+ /**
+ * @defgroup metaprogramming Type Traits
+ * @ingroup utilities
+ *
+ * Compile time type transformation and information.
+ * @{
+ */
+
+ // For use in __is_convertible_simple.
+ struct __sfinae_types
+ {
+ typedef char __one;
+ typedef struct { char __arr[2]; } __two;
+ };
+
+#define _DEFINE_SPEC_0_HELPER \
+ template<>
+
+#define _DEFINE_SPEC_1_HELPER \
+ template<typename _Tp>
+
+#define _DEFINE_SPEC_2_HELPER \
+ template<typename _Tp, typename _Cp>
+
+#define _DEFINE_SPEC(_Order, _Trait, _Type, _Value) \
+ _DEFINE_SPEC_##_Order##_HELPER \
+ struct _Trait<_Type> \
+ : public integral_constant<bool, _Value> { };
+
+ // helper classes [4.3].
+
+ /// integral_constant
+ template<typename _Tp, _Tp __v>
+ struct integral_constant
+ {
+ static const _Tp value = __v;
+ typedef _Tp value_type;
+ typedef integral_constant<_Tp, __v> type;
+ };
+
+ /// typedef for true_type
+ typedef integral_constant<bool, true> true_type;
+
+ /// typedef for false_type
+ typedef integral_constant<bool, false> false_type;
+
+ template<typename _Tp, _Tp __v>
+ const _Tp integral_constant<_Tp, __v>::value;
+
+ /// remove_cv
+ template<typename>
+ struct remove_cv;
+
+ template<typename>
+ struct __is_void_helper
+ : public false_type { };
+ _DEFINE_SPEC(0, __is_void_helper, void, true)
+
+ // primary type categories [4.5.1].
+
+ /// is_void
+ template<typename _Tp>
+ struct is_void
+ : public integral_constant<bool, (__is_void_helper<typename
+ remove_cv<_Tp>::type>::value)>
+ { };
+
+ template<typename>
+ struct __is_integral_helper
+ : public false_type { };
+ _DEFINE_SPEC(0, __is_integral_helper, bool, true)
+ _DEFINE_SPEC(0, __is_integral_helper, char, true)
+ _DEFINE_SPEC(0, __is_integral_helper, signed char, true)
+ _DEFINE_SPEC(0, __is_integral_helper, unsigned char, true)
+#ifdef _GLIBCXX_USE_WCHAR_T
+ _DEFINE_SPEC(0, __is_integral_helper, wchar_t, true)
+#endif
+#ifdef _GLIBCXX_INCLUDE_AS_CXX0X
+ _DEFINE_SPEC(0, __is_integral_helper, char16_t, true)
+ _DEFINE_SPEC(0, __is_integral_helper, char32_t, true)
+#endif
+ _DEFINE_SPEC(0, __is_integral_helper, short, true)
+ _DEFINE_SPEC(0, __is_integral_helper, unsigned short, true)
+ _DEFINE_SPEC(0, __is_integral_helper, int, true)
+ _DEFINE_SPEC(0, __is_integral_helper, unsigned int, true)
+ _DEFINE_SPEC(0, __is_integral_helper, long, true)
+ _DEFINE_SPEC(0, __is_integral_helper, unsigned long, true)
+ _DEFINE_SPEC(0, __is_integral_helper, long long, true)
+ _DEFINE_SPEC(0, __is_integral_helper, unsigned long long, true)
+
+ /// is_integral
+ template<typename _Tp>
+ struct is_integral
+ : public integral_constant<bool, (__is_integral_helper<typename
+ remove_cv<_Tp>::type>::value)>
+ { };
+
+ template<typename>
+ struct __is_floating_point_helper
+ : public false_type { };
+ _DEFINE_SPEC(0, __is_floating_point_helper, float, true)
+ _DEFINE_SPEC(0, __is_floating_point_helper, double, true)
+ _DEFINE_SPEC(0, __is_floating_point_helper, long double, true)
+
+ /// is_floating_point
+ template<typename _Tp>
+ struct is_floating_point
+ : public integral_constant<bool, (__is_floating_point_helper<typename
+ remove_cv<_Tp>::type>::value)>
+ { };
+
+ /// is_array
+ template<typename>
+ struct is_array
+ : public false_type { };
+
+ template<typename _Tp, std::size_t _Size>
+ struct is_array<_Tp[_Size]>
+ : public true_type { };
+
+ template<typename _Tp>
+ struct is_array<_Tp[]>
+ : public true_type { };
+
+ template<typename>
+ struct __is_pointer_helper
+ : public false_type { };
+ _DEFINE_SPEC(1, __is_pointer_helper, _Tp*, true)
+
+ /// is_pointer
+ template<typename _Tp>
+ struct is_pointer
+ : public integral_constant<bool, (__is_pointer_helper<typename
+ remove_cv<_Tp>::type>::value)>
+ { };
+
+ /// is_reference
+ template<typename _Tp>
+ struct is_reference;
+
+ /// is_function
+ template<typename _Tp>
+ struct is_function;
+
+ template<typename>
+ struct __is_member_object_pointer_helper
+ : public false_type { };
+ _DEFINE_SPEC(2, __is_member_object_pointer_helper, _Tp _Cp::*,
+ !is_function<_Tp>::value)
+
+ /// is_member_object_pointer
+ template<typename _Tp>
+ struct is_member_object_pointer
+ : public integral_constant<bool, (__is_member_object_pointer_helper<
+ typename remove_cv<_Tp>::type>::value)>
+ { };
+
+ template<typename>
+ struct __is_member_function_pointer_helper
+ : public false_type { };
+ _DEFINE_SPEC(2, __is_member_function_pointer_helper, _Tp _Cp::*,
+ is_function<_Tp>::value)
+
+ /// is_member_function_pointer
+ template<typename _Tp>
+ struct is_member_function_pointer
+ : public integral_constant<bool, (__is_member_function_pointer_helper<
+ typename remove_cv<_Tp>::type>::value)>
+ { };
+
+ /// is_enum
+ template<typename _Tp>
+ struct is_enum
+ : public integral_constant<bool, __is_enum(_Tp)>
+ { };
+
+ /// is_union
+ template<typename _Tp>
+ struct is_union
+ : public integral_constant<bool, __is_union(_Tp)>
+ { };
+
+ /// is_class
+ template<typename _Tp>
+ struct is_class
+ : public integral_constant<bool, __is_class(_Tp)>
+ { };
+
+ /// is_function
+ template<typename>
+ struct is_function
+ : public false_type { };
+ template<typename _Res, typename... _ArgTypes>
+ struct is_function<_Res(_ArgTypes...)>
+ : public true_type { };
+ template<typename _Res, typename... _ArgTypes>
+ struct is_function<_Res(_ArgTypes......)>
+ : public true_type { };
+ template<typename _Res, typename... _ArgTypes>
+ struct is_function<_Res(_ArgTypes...) const>
+ : public true_type { };
+ template<typename _Res, typename... _ArgTypes>
+ struct is_function<_Res(_ArgTypes......) const>
+ : public true_type { };
+ template<typename _Res, typename... _ArgTypes>
+ struct is_function<_Res(_ArgTypes...) volatile>
+ : public true_type { };
+ template<typename _Res, typename... _ArgTypes>
+ struct is_function<_Res(_ArgTypes......) volatile>
+ : public true_type { };
+ template<typename _Res, typename... _ArgTypes>
+ struct is_function<_Res(_ArgTypes...) const volatile>
+ : public true_type { };
+ template<typename _Res, typename... _ArgTypes>
+ struct is_function<_Res(_ArgTypes......) const volatile>
+ : public true_type { };
+
+ // composite type traits [4.5.2].
+
+ /// is_arithmetic
+ template<typename _Tp>
+ struct is_arithmetic
+ : public integral_constant<bool, (is_integral<_Tp>::value
+ || is_floating_point<_Tp>::value)>
+ { };
+
+ /// is_fundamental
+ template<typename _Tp>
+ struct is_fundamental
+ : public integral_constant<bool, (is_arithmetic<_Tp>::value
+ || is_void<_Tp>::value)>
+ { };
+
+ /// is_object
+ template<typename _Tp>
+ struct is_object
+ : public integral_constant<bool, !(is_function<_Tp>::value
+ || is_reference<_Tp>::value
+ || is_void<_Tp>::value)>
+ { };
+
+ /// is_member_pointer
+ template<typename _Tp>
+ struct is_member_pointer;
+
+ /// is_scalar
+ template<typename _Tp>
+ struct is_scalar
+ : public integral_constant<bool, (is_arithmetic<_Tp>::value
+ || is_enum<_Tp>::value
+ || is_pointer<_Tp>::value
+ || is_member_pointer<_Tp>::value)>
+ { };
+
+ /// is_compound
+ template<typename _Tp>
+ struct is_compound
+ : public integral_constant<bool, !is_fundamental<_Tp>::value> { };
+
+ /// is_member_pointer
+ template<typename _Tp>
+ struct __is_member_pointer_helper
+ : public false_type { };
+ _DEFINE_SPEC(2, __is_member_pointer_helper, _Tp _Cp::*, true)
+
+ template<typename _Tp>
+ struct is_member_pointer
+ : public integral_constant<bool, (__is_member_pointer_helper<
+ typename remove_cv<_Tp>::type>::value)>
+ { };
+
+ // type properties [4.5.3].
+ /// is_const
+ template<typename>
+ struct is_const
+ : public false_type { };
+
+ template<typename _Tp>
+ struct is_const<_Tp const>
+ : public true_type { };
+
+ /// is_volatile
+ template<typename>
+ struct is_volatile
+ : public false_type { };
+
+ template<typename _Tp>
+ struct is_volatile<_Tp volatile>
+ : public true_type { };
+
+ /// is_empty
+ template<typename _Tp>
+ struct is_empty
+ : public integral_constant<bool, __is_empty(_Tp)>
+ { };
+
+ /// is_polymorphic
+ template<typename _Tp>
+ struct is_polymorphic
+ : public integral_constant<bool, __is_polymorphic(_Tp)>
+ { };
+
+ /// is_abstract
+ template<typename _Tp>
+ struct is_abstract
+ : public integral_constant<bool, __is_abstract(_Tp)>
+ { };
+
+ /// has_virtual_destructor
+ template<typename _Tp>
+ struct has_virtual_destructor
+ : public integral_constant<bool, __has_virtual_destructor(_Tp)>
+ { };
+
+ /// alignment_of
+ template<typename _Tp>
+ struct alignment_of
+ : public integral_constant<std::size_t, __alignof__(_Tp)> { };
+
+ /// rank
+ template<typename>
+ struct rank
+ : public integral_constant<std::size_t, 0> { };
+
+ template<typename _Tp, std::size_t _Size>
+ struct rank<_Tp[_Size]>
+ : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { };
+
+ template<typename _Tp>
+ struct rank<_Tp[]>
+ : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { };
+
+ /// extent
+ template<typename, unsigned _Uint = 0>
+ struct extent
+ : public integral_constant<std::size_t, 0> { };
+
+ template<typename _Tp, unsigned _Uint, std::size_t _Size>
+ struct extent<_Tp[_Size], _Uint>
+ : public integral_constant<std::size_t,
+ _Uint == 0 ? _Size : extent<_Tp,
+ _Uint - 1>::value>
+ { };
+
+ template<typename _Tp, unsigned _Uint>
+ struct extent<_Tp[], _Uint>
+ : public integral_constant<std::size_t,
+ _Uint == 0 ? 0 : extent<_Tp,
+ _Uint - 1>::value>
+ { };
+
+ // relationships between types [4.6].
+
+ /// is_same
+ template<typename, typename>
+ struct is_same
+ : public false_type { };
+
+ template<typename _Tp>
+ struct is_same<_Tp, _Tp>
+ : public true_type { };
+
+ // const-volatile modifications [4.7.1].
+
+ /// remove_const
+ template<typename _Tp>
+ struct remove_const
+ { typedef _Tp type; };
+
+ template<typename _Tp>
+ struct remove_const<_Tp const>
+ { typedef _Tp type; };
+
+ /// remove_volatile
+ template<typename _Tp>
+ struct remove_volatile
+ { typedef _Tp type; };
+
+ template<typename _Tp>
+ struct remove_volatile<_Tp volatile>
+ { typedef _Tp type; };
+
+ /// remove_cv
+ template<typename _Tp>
+ struct remove_cv
+ {
+ typedef typename
+ remove_const<typename remove_volatile<_Tp>::type>::type type;
+ };
+
+ /// add_const
+ template<typename _Tp>
+ struct add_const
+ { typedef _Tp const type; };
+
+ /// add_volatile
+ template<typename _Tp>
+ struct add_volatile
+ { typedef _Tp volatile type; };
+
+ /// add_cv
+ template<typename _Tp>
+ struct add_cv
+ {
+ typedef typename
+ add_const<typename add_volatile<_Tp>::type>::type type;
+ };
+
+ // array modifications [4.7.3].
+
+ /// remove_extent
+ template<typename _Tp>
+ struct remove_extent
+ { typedef _Tp type; };
+
+ template<typename _Tp, std::size_t _Size>
+ struct remove_extent<_Tp[_Size]>
+ { typedef _Tp type; };
+
+ template<typename _Tp>
+ struct remove_extent<_Tp[]>
+ { typedef _Tp type; };
+
+ /// remove_all_extents
+ template<typename _Tp>
+ struct remove_all_extents
+ { typedef _Tp type; };
+
+ template<typename _Tp, std::size_t _Size>
+ struct remove_all_extents<_Tp[_Size]>
+ { typedef typename remove_all_extents<_Tp>::type type; };
+
+ template<typename _Tp>
+ struct remove_all_extents<_Tp[]>
+ { typedef typename remove_all_extents<_Tp>::type type; };
+
+ // pointer modifications [4.7.4].
+
+ template<typename _Tp, typename>
+ struct __remove_pointer_helper
+ { typedef _Tp type; };
+
+ template<typename _Tp, typename _Up>
+ struct __remove_pointer_helper<_Tp, _Up*>
+ { typedef _Up type; };
+
+ /// remove_pointer
+ template<typename _Tp>
+ struct remove_pointer
+ : public __remove_pointer_helper<_Tp, typename remove_cv<_Tp>::type>
+ { };
+
+ template<typename>
+ struct remove_reference;
+
+ /// add_pointer
+ template<typename _Tp>
+ struct add_pointer
+ { typedef typename remove_reference<_Tp>::type* type; };
+
+#undef _DEFINE_SPEC_0_HELPER
+#undef _DEFINE_SPEC_1_HELPER
+#undef _DEFINE_SPEC_2_HELPER
+#undef _DEFINE_SPEC
+
+ // @} group metaprogramming
+_GLIBCXX_END_NAMESPACE_TR1
+}
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