| // -*- C++ -*- |
| //===------------------------ type_traits ---------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP_TYPE_TRAITS |
| #define _LIBCPP_TYPE_TRAITS |
| |
| /* |
| type_traits synopsis |
| |
| namespace std |
| { |
| |
| // helper class: |
| template <class T, T v> struct integral_constant; |
| typedef integral_constant<bool, true> true_type; |
| typedef integral_constant<bool, false> false_type; |
| |
| // helper traits |
| template <bool, class T = void> struct enable_if; |
| template <bool, class T, class F> struct conditional; |
| |
| // Primary classification traits: |
| template <class T> struct is_void; |
| template <class T> struct is_integral; |
| template <class T> struct is_floating_point; |
| template <class T> struct is_array; |
| template <class T> struct is_pointer; |
| template <class T> struct is_lvalue_reference; |
| template <class T> struct is_rvalue_reference; |
| template <class T> struct is_reference; |
| template <class T> struct is_member_object_pointer; |
| template <class T> struct is_member_function_pointer; |
| template <class T> struct is_enum; |
| template <class T> struct is_union; |
| template <class T> struct is_class; |
| template <class T> struct is_function; |
| |
| // Secondary classification traits: |
| template <class T> struct is_reference; |
| template <class T> struct is_arithmetic; |
| template <class T> struct is_fundamental; |
| template <class T> struct is_member_pointer; |
| template <class T> struct is_scalar; |
| template <class T> struct is_object; |
| template <class T> struct is_compound; |
| |
| // Const-volatile properties and transformations: |
| template <class T> struct is_const; |
| template <class T> struct is_volatile; |
| template <class T> struct remove_const; |
| template <class T> struct remove_volatile; |
| template <class T> struct remove_cv; |
| template <class T> struct add_const; |
| template <class T> struct add_volatile; |
| template <class T> struct add_cv; |
| |
| // Reference transformations: |
| template <class T> struct remove_reference; |
| template <class T> struct add_lvalue_reference; |
| template <class T> struct add_rvalue_reference; |
| |
| // Pointer transformations: |
| template <class T> struct remove_pointer; |
| template <class T> struct add_pointer; |
| |
| // Integral properties: |
| template <class T> struct is_signed; |
| template <class T> struct is_unsigned; |
| template <class T> struct make_signed; |
| template <class T> struct make_unsigned; |
| |
| // Array properties and transformations: |
| template <class T> struct rank; |
| template <class T, unsigned I = 0> struct extent; |
| template <class T> struct remove_extent; |
| template <class T> struct remove_all_extents; |
| |
| // Member introspection: |
| template <class T> struct is_pod; |
| template <class T> struct is_trivial; |
| template <class T> struct is_trivially_copyable; |
| template <class T> struct is_standard_layout; |
| template <class T> struct is_literal_type; |
| template <class T> struct is_empty; |
| template <class T> struct is_polymorphic; |
| template <class T> struct is_abstract; |
| template <class T, class... Args> struct is_constructible; |
| template <class T, class... Args> struct is_nothrow_constructible; |
| template <class T> struct has_default_constructor; |
| template <class T> struct has_copy_constructor; |
| template <class T> struct has_move_constructor; |
| template <class T> struct has_copy_assign; |
| template <class T> struct has_move_assign; |
| template <class T> struct has_trivial_default_constructor |
| template <class T> struct has_trivial_copy_constructor; |
| template <class T> struct has_trivial_move_constructor; |
| template <class T> struct has_trivial_copy_assign; |
| template <class T> struct has_trivial_move_assign; |
| template <class T> struct has_trivial_destructor; |
| template <class T> struct has_nothrow_default_constructor; |
| template <class T> struct has_nothrow_copy_constructor; |
| template <class T> struct has_nothrow_move_constructor; |
| template <class T> struct has_nothrow_copy_assign; |
| template <class T> struct has_nothrow_move_assign; |
| template <class T> struct has_virtual_destructor; |
| |
| // Relationships between types: |
| template <class T, class U> struct is_same; |
| template <class Base, class Derived> struct is_base_of; |
| template <class From, class To> struct is_convertible; |
| template <class From, class To> struct is_explicitly_convertible; |
| template <class T> struct underlying_type; |
| |
| // Alignment properties and transformations: |
| template <class T> struct alignment_of; |
| template <size_t Len, size_t Align = most_stringent_alignment_requirement> |
| struct aligned_storage; |
| template <std::size_t Len, class... Types> struct aligned_union; |
| |
| template <class T> struct decay; |
| template <class... T> struct common_type; |
| template <class T> struct underlying_type; |
| template <class> class result_of; // undefined |
| template <class Fn, class... ArgTypes> class result_of<Fn(ArgTypes...)>; |
| |
| } // std |
| |
| */ |
| #include <__config> |
| #include <cstddef> |
| |
| #pragma GCC system_header |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| template <bool _B, class _If, class _Then> struct conditional {typedef _If type;}; |
| template <class _If, class _Then> struct conditional<false, _If, _Then> {typedef _Then type;}; |
| |
| template <bool, class _Tp = void> struct enable_if {}; |
| template <class _Tp> struct enable_if<true, _Tp> {typedef _Tp type;}; |
| |
| struct __two {char _[2];}; |
| |
| // helper class: |
| |
| template <class _Tp, _Tp __v> |
| struct integral_constant |
| { |
| static const _Tp value = __v; |
| typedef _Tp value_type; |
| typedef integral_constant type; |
| }; |
| |
| template <class _Tp, _Tp __v> |
| const _Tp integral_constant<_Tp, __v>::value; |
| |
| typedef integral_constant<bool, true> true_type; |
| typedef integral_constant<bool, false> false_type; |
| |
| // is_const |
| |
| template <class _Tp> struct is_const : public false_type {}; |
| template <class _Tp> struct is_const<_Tp const> : public true_type {}; |
| |
| // is_volatile |
| |
| template <class _Tp> struct is_volatile : public false_type {}; |
| template <class _Tp> struct is_volatile<_Tp volatile> : public true_type {}; |
| |
| // remove_const |
| |
| template <class _Tp> struct remove_const {typedef _Tp type;}; |
| template <class _Tp> struct remove_const<const _Tp> {typedef _Tp type;}; |
| |
| // remove_volatile |
| |
| template <class _Tp> struct remove_volatile {typedef _Tp type;}; |
| template <class _Tp> struct remove_volatile<volatile _Tp> {typedef _Tp type;}; |
| |
| // remove_cv |
| |
| template <class _Tp> struct remove_cv |
| {typedef typename remove_volatile<typename remove_const<_Tp>::type>::type type;}; |
| |
| // is_void |
| |
| template <class _Tp> struct __is_void : public false_type {}; |
| template <> struct __is_void<void> : public true_type {}; |
| |
| template <class _Tp> struct is_void : public __is_void<typename remove_cv<_Tp>::type> {}; |
| |
| // is_integral |
| |
| template <class _Tp> struct __is_integral : public false_type {}; |
| template <> struct __is_integral<bool> : public true_type {}; |
| template <> struct __is_integral<char> : public true_type {}; |
| template <> struct __is_integral<signed char> : public true_type {}; |
| template <> struct __is_integral<unsigned char> : public true_type {}; |
| template <> struct __is_integral<wchar_t> : public true_type {}; |
| #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS |
| template <> struct __is_integral<char16_t> : public true_type {}; |
| template <> struct __is_integral<char32_t> : public true_type {}; |
| #endif |
| template <> struct __is_integral<short> : public true_type {}; |
| template <> struct __is_integral<unsigned short> : public true_type {}; |
| template <> struct __is_integral<int> : public true_type {}; |
| template <> struct __is_integral<unsigned int> : public true_type {}; |
| template <> struct __is_integral<long> : public true_type {}; |
| template <> struct __is_integral<unsigned long> : public true_type {}; |
| template <> struct __is_integral<long long> : public true_type {}; |
| template <> struct __is_integral<unsigned long long> : public true_type {}; |
| |
| template <class _Tp> struct is_integral : public __is_integral<typename remove_cv<_Tp>::type> {}; |
| |
| // is_floating_point |
| |
| template <class _Tp> struct __is_floating_point : public false_type {}; |
| template <> struct __is_floating_point<float> : public true_type {}; |
| template <> struct __is_floating_point<double> : public true_type {}; |
| template <> struct __is_floating_point<long double> : public true_type {}; |
| |
| template <class _Tp> struct is_floating_point : public __is_floating_point<typename remove_cv<_Tp>::type> {}; |
| |
| // is_array |
| |
| template <class _Tp> struct is_array : public false_type {}; |
| template <class _Tp> struct is_array<_Tp[]> : public true_type {}; |
| template <class _Tp, size_t _Np> struct is_array<_Tp[_Np]> : public true_type {}; |
| |
| // is_pointer |
| |
| template <class _Tp> struct __is_pointer : public false_type {}; |
| template <class _Tp> struct __is_pointer<_Tp*> : public true_type {}; |
| |
| template <class _Tp> struct is_pointer : public __is_pointer<typename remove_cv<_Tp>::type> {}; |
| |
| // is_reference |
| |
| template <class _Tp> struct is_lvalue_reference : public false_type {}; |
| template <class _Tp> struct is_lvalue_reference<_Tp&> : public true_type {}; |
| |
| template <class _Tp> struct is_rvalue_reference : public false_type {}; |
| #ifdef _LIBCPP_MOVE |
| template <class _Tp> struct is_rvalue_reference<_Tp&&> : public true_type {}; |
| #endif |
| |
| template <class _Tp> struct is_reference : public false_type {}; |
| template <class _Tp> struct is_reference<_Tp&> : public true_type {}; |
| #ifdef _LIBCPP_MOVE |
| template <class _Tp> struct is_reference<_Tp&&> : public true_type {}; |
| #endif |
| |
| // is_union |
| |
| #if __GNUC__ >= 4 && __GNUC_MINOR__ >= 3 |
| |
| template <class _Tp> struct is_union : public integral_constant<bool, __is_union(_Tp)> {}; |
| |
| #else |
| |
| template <class _Tp> struct __libcpp_union : public false_type {}; |
| template <class _Tp> struct is_union : public __libcpp_union<typename remove_cv<_Tp>::type> {}; |
| |
| #endif |
| |
| // is_class |
| |
| namespace __is_class_imp |
| { |
| template <class _Tp> char __test(int _Tp::*); |
| template <class _Tp> __two __test(...); |
| } |
| |
| template <class _Tp> struct is_class |
| : public integral_constant<bool, sizeof(__is_class_imp::__test<_Tp>(0)) == 1 && !is_union<_Tp>::value> {}; |
| |
| // is_function |
| |
| namespace __is_function_imp |
| { |
| template <class _Tp> char __test(_Tp*); |
| template <class _Tp> __two __test(...); |
| template <class _Tp> _Tp& __source(); |
| } |
| |
| template <class _Tp, bool = is_class<_Tp>::value || |
| is_union<_Tp>::value || |
| is_void<_Tp>::value || |
| is_reference<_Tp>::value> |
| struct __is_function |
| : public integral_constant<bool, sizeof(__is_function_imp::__test<_Tp>(__is_function_imp::__source<_Tp>())) == 1> |
| {}; |
| template <class _Tp> struct __is_function<_Tp, true> : public false_type {}; |
| |
| template <class _Tp> struct is_function : public __is_function<_Tp> {}; |
| |
| // is_member_function_pointer |
| |
| template <class _Tp> struct __is_member_function_pointer : public false_type {}; |
| template <class _Tp, class _Up> struct __is_member_function_pointer<_Tp _Up::*> : public is_function<_Tp> {}; |
| |
| template <class _Tp> struct is_member_function_pointer |
| : public __is_member_function_pointer<typename remove_cv<_Tp>::type> {}; |
| |
| // is_member_pointer |
| |
| template <class _Tp> struct __is_member_pointer : public false_type {}; |
| template <class _Tp, class _Up> struct __is_member_pointer<_Tp _Up::*> : public true_type {}; |
| |
| template <class _Tp> struct is_member_pointer |
| : public __is_member_pointer<typename remove_cv<_Tp>::type> {}; |
| |
| // is_member_object_pointer |
| |
| template <class _Tp> struct is_member_object_pointer |
| : public integral_constant<bool, is_member_pointer<_Tp>::value && |
| !is_member_function_pointer<_Tp>::value> {}; |
| |
| // is_enum |
| |
| template <class _Tp> struct is_enum |
| : public integral_constant<bool, !is_void<_Tp>::value && |
| !is_integral<_Tp>::value && |
| !is_floating_point<_Tp>::value && |
| !is_array<_Tp>::value && |
| !is_pointer<_Tp>::value && |
| !is_reference<_Tp>::value && |
| !is_member_pointer<_Tp>::value && |
| !is_union<_Tp>::value && |
| !is_class<_Tp>::value && |
| !is_function<_Tp>::value > {}; |
| |
| // is_arithmetic |
| |
| template <class _Tp> struct is_arithmetic |
| : public integral_constant<bool, is_integral<_Tp>::value || |
| is_floating_point<_Tp>::value> {}; |
| |
| // is_fundamental |
| |
| template <class _Tp> struct is_fundamental |
| : public integral_constant<bool, is_void<_Tp>::value || |
| is_arithmetic<_Tp>::value> {}; |
| |
| // is_scalar |
| |
| template <class _Tp> struct is_scalar |
| : public integral_constant<bool, is_arithmetic<_Tp>::value || |
| is_member_pointer<_Tp>::value || |
| is_pointer<_Tp>::value || |
| is_enum<_Tp>::value > {}; |
| |
| // is_object |
| |
| template <class _Tp> struct is_object |
| : public integral_constant<bool, is_scalar<_Tp>::value || |
| is_array<_Tp>::value || |
| is_union<_Tp>::value || |
| is_class<_Tp>::value > {}; |
| |
| // is_compound |
| |
| template <class _Tp> struct is_compound : public integral_constant<bool, !is_fundamental<_Tp>::value> {}; |
| |
| // add_const |
| |
| template <class _Tp, bool = is_reference<_Tp>::value || |
| is_function<_Tp>::value || |
| is_const<_Tp>::value > |
| struct __add_const {typedef _Tp type;}; |
| |
| template <class _Tp> |
| struct __add_const<_Tp, false> {typedef const _Tp type;}; |
| |
| template <class _Tp> struct add_const {typedef typename __add_const<_Tp>::type type;}; |
| |
| // add_volatile |
| |
| template <class _Tp, bool = is_reference<_Tp>::value || |
| is_function<_Tp>::value || |
| is_volatile<_Tp>::value > |
| struct __add_volatile {typedef _Tp type;}; |
| |
| template <class _Tp> |
| struct __add_volatile<_Tp, false> {typedef volatile _Tp type;}; |
| |
| template <class _Tp> struct add_volatile {typedef typename __add_volatile<_Tp>::type type;}; |
| |
| // add_cv |
| |
| template <class _Tp> struct add_cv {typedef typename add_const<typename add_volatile<_Tp>::type>::type type;}; |
| |
| // remove_reference |
| |
| template <class _Tp> struct remove_reference {typedef _Tp type;}; |
| template <class _Tp> struct remove_reference<_Tp&> {typedef _Tp type;}; |
| #ifdef _LIBCPP_MOVE |
| template <class _Tp> struct remove_reference<_Tp&&> {typedef _Tp type;}; |
| #endif |
| |
| // add_lvalue_reference |
| |
| template <class _Tp> struct add_lvalue_reference {typedef _Tp& type;}; |
| template <class _Tp> struct add_lvalue_reference<_Tp&> {typedef _Tp& type;}; // for older compiler |
| template <> struct add_lvalue_reference<void> {typedef void type;}; |
| template <> struct add_lvalue_reference<const void> {typedef const void type;}; |
| template <> struct add_lvalue_reference<volatile void> {typedef volatile void type;}; |
| template <> struct add_lvalue_reference<const volatile void> {typedef const volatile void type;}; |
| |
| #ifdef _LIBCPP_MOVE |
| |
| template <class _Tp> struct add_rvalue_reference {typedef _Tp&& type;}; |
| template <> struct add_rvalue_reference<void> {typedef void type;}; |
| template <> struct add_rvalue_reference<const void> {typedef const void type;}; |
| template <> struct add_rvalue_reference<volatile void> {typedef volatile void type;}; |
| template <> struct add_rvalue_reference<const volatile void> {typedef const volatile void type;}; |
| |
| #endif |
| |
| // remove_pointer |
| |
| template <class _Tp> struct remove_pointer {typedef _Tp type;}; |
| template <class _Tp> struct remove_pointer<_Tp*> {typedef _Tp type;}; |
| template <class _Tp> struct remove_pointer<_Tp* const> {typedef _Tp type;}; |
| template <class _Tp> struct remove_pointer<_Tp* volatile> {typedef _Tp type;}; |
| template <class _Tp> struct remove_pointer<_Tp* const volatile> {typedef _Tp type;}; |
| |
| // add_pointer |
| |
| template <class _Tp> struct add_pointer {typedef typename remove_reference<_Tp>::type* type;}; |
| |
| // is_signed |
| |
| template <class _Tp, bool = is_integral<_Tp>::value> |
| struct ___is_signed : public integral_constant<bool, _Tp(-1) < _Tp(0)> {}; |
| |
| template <class _Tp> |
| struct ___is_signed<_Tp, false> : public true_type {}; // floating point |
| |
| template <class _Tp, bool = is_arithmetic<_Tp>::value> |
| struct __is_signed : public ___is_signed<_Tp> {}; |
| |
| template <class _Tp> struct __is_signed<_Tp, false> : public false_type {}; |
| |
| template <class _Tp> struct is_signed : public __is_signed<_Tp> {}; |
| |
| // is_unsigned |
| |
| template <class _Tp, bool = is_integral<_Tp>::value> |
| struct ___is_unsigned : public integral_constant<bool, _Tp(0) < _Tp(-1)> {}; |
| |
| template <class _Tp> |
| struct ___is_unsigned<_Tp, false> : public false_type {}; // floating point |
| |
| template <class _Tp, bool = is_arithmetic<_Tp>::value> |
| struct __is_unsigned : public ___is_unsigned<_Tp> {}; |
| |
| template <class _Tp> struct __is_unsigned<_Tp, false> : public false_type {}; |
| |
| template <class _Tp> struct is_unsigned : public __is_unsigned<_Tp> {}; |
| |
| // rank |
| |
| template <class _Tp> struct rank : public integral_constant<size_t, 0> {}; |
| template <class _Tp> struct rank<_Tp[]> : public integral_constant<size_t, rank<_Tp>::value + 1> {}; |
| template <class _Tp, size_t _Np> struct rank<_Tp[_Np]> : public integral_constant<size_t, rank<_Tp>::value + 1> {}; |
| |
| // extent |
| |
| template <class _Tp, unsigned _Ip = 0> struct extent : public integral_constant<size_t, 0> {}; |
| template <class _Tp> struct extent<_Tp[], 0> : public integral_constant<size_t, 0> {}; |
| template <class _Tp, unsigned _Ip> struct extent<_Tp[], _Ip> : public integral_constant<size_t, extent<_Tp, _Ip-1>::value> {}; |
| template <class _Tp, size_t _Np> struct extent<_Tp[_Np], 0> : public integral_constant<size_t, _Np> {}; |
| template <class _Tp, size_t _Np, unsigned _Ip> struct extent<_Tp[_Np], _Ip> : public integral_constant<size_t, extent<_Tp, _Ip-1>::value> {}; |
| |
| // remove_extent |
| |
| template <class _Tp> struct remove_extent {typedef _Tp type;}; |
| template <class _Tp> struct remove_extent<_Tp[]> {typedef _Tp type;}; |
| template <class _Tp, size_t _Np> struct remove_extent<_Tp[_Np]> {typedef _Tp type;}; |
| |
| // remove_all_extents |
| |
| template <class _Tp> struct remove_all_extents {typedef _Tp type;}; |
| template <class _Tp> struct remove_all_extents<_Tp[]> {typedef typename remove_all_extents<_Tp>::type type;}; |
| template <class _Tp, size_t _Np> struct remove_all_extents<_Tp[_Np]> {typedef typename remove_all_extents<_Tp>::type type;}; |
| |
| // is_same |
| |
| template <class _Tp, class _Up> struct is_same : public false_type {}; |
| template <class _Tp> struct is_same<_Tp, _Tp> : public true_type {}; |
| |
| // is_abstract |
| |
| namespace __is_abstract_imp |
| { |
| template <class _Tp> char __test(_Tp (*)[1]); |
| template <class _Tp> __two __test(...); |
| } |
| |
| template <class _Tp, bool = is_class<_Tp>::value> |
| struct __libcpp_abstract : public integral_constant<bool, sizeof(__is_abstract_imp::__test<_Tp>(0)) != 1> {}; |
| |
| template <class _Tp> struct __libcpp_abstract<_Tp, false> : public false_type {}; |
| |
| template <class _Tp> struct is_abstract : public __libcpp_abstract<_Tp> {}; |
| |
| // is_convertible |
| |
| namespace __is_convertible_imp |
| { |
| #ifdef _LIBCPP_MOVE |
| template <class _Tp> char __test(const volatile typename remove_reference<_Tp>::type&&); |
| #else |
| template <class _Tp> char __test(_Tp); |
| #endif |
| template <class _Tp> __two __test(...); |
| #ifdef _LIBCPP_MOVE |
| template <class _Tp> _Tp&& __source(); |
| #else |
| template <class _Tp> typename remove_reference<_Tp>::type& __source(); |
| #endif |
| |
| template <class _Tp, bool _IsArray = is_array<_Tp>::value, |
| bool _IsFunction = is_function<_Tp>::value, |
| bool _IsVoid = is_void<_Tp>::value> |
| struct __is_array_function_or_void {enum {value = 0};}; |
| template <class _Tp> struct __is_array_function_or_void<_Tp, true, false, false> {enum {value = 1};}; |
| template <class _Tp> struct __is_array_function_or_void<_Tp, false, true, false> {enum {value = 2};}; |
| template <class _Tp> struct __is_array_function_or_void<_Tp, false, false, true> {enum {value = 3};}; |
| } |
| |
| template <class _Tp, |
| unsigned = __is_convertible_imp::__is_array_function_or_void<typename remove_reference<_Tp>::type>::value> |
| struct __is_convertible_check |
| { |
| static const size_t __v = 0; |
| }; |
| |
| template <class _Tp> |
| struct __is_convertible_check<_Tp, 0> |
| { |
| static const size_t __v = sizeof(_Tp); |
| }; |
| |
| template <class _T1, class _T2, |
| unsigned _T1_is_array_function_or_void = __is_convertible_imp::__is_array_function_or_void<_T1>::value, |
| unsigned _T2_is_array_function_or_void = __is_convertible_imp::__is_array_function_or_void<_T2>::value> |
| struct __is_convertible |
| : public integral_constant<bool, |
| sizeof(__is_convertible_imp::__test<_T2>(__is_convertible_imp::__source<_T1>())) == 1 |
| > |
| {}; |
| |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 1, 0> : false_type {}; |
| |
| template <class _T1> struct __is_convertible<_T1, const _T1&, 1, 0> : true_type {}; |
| #ifdef _LIBCPP_MOVE |
| template <class _T1> struct __is_convertible<_T1, _T1&&, 1, 0> : true_type {}; |
| template <class _T1> struct __is_convertible<_T1, const _T1&&, 1, 0> : true_type {}; |
| template <class _T1> struct __is_convertible<_T1, volatile _T1&&, 1, 0> : true_type {}; |
| template <class _T1> struct __is_convertible<_T1, const volatile _T1&&, 1, 0> : true_type {}; |
| #endif |
| |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2*, 1, 0> |
| : public integral_constant<bool, __is_convertible<typename remove_all_extents<_T1>::type*, _T2*>::value> {}; |
| |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2* const, 1, 0> |
| : public integral_constant<bool, __is_convertible<typename remove_all_extents<_T1>::type*, _T2*const>::value> {}; |
| |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2* volatile, 1, 0> |
| : public integral_constant<bool, __is_convertible<typename remove_all_extents<_T1>::type*, _T2*volatile>::value> {}; |
| |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2* const volatile, 1, 0> |
| : public integral_constant<bool, __is_convertible<typename remove_all_extents<_T1>::type*, _T2*const volatile>::value> {}; |
| |
| |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 2, 0> : public false_type {}; |
| #ifdef _LIBCPP_MOVE |
| template <class _T1> struct __is_convertible<_T1, _T1&&, 2, 0> : public true_type {}; |
| #endif |
| template <class _T1> struct __is_convertible<_T1, _T1*, 2, 0> : public true_type {}; |
| template <class _T1> struct __is_convertible<_T1, _T1*const, 2, 0> : public true_type {}; |
| template <class _T1> struct __is_convertible<_T1, _T1*volatile, 2, 0> : public true_type {}; |
| template <class _T1> struct __is_convertible<_T1, _T1*const volatile, 2, 0> : public true_type {}; |
| |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 3, 0> : public false_type {}; |
| |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 0, 1> : public false_type {}; |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 1, 1> : public false_type {}; |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 2, 1> : public false_type {}; |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 3, 1> : public false_type {}; |
| |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 0, 2> : public false_type {}; |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 1, 2> : public false_type {}; |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 2, 2> : public false_type {}; |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 3, 2> : public false_type {}; |
| |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 0, 3> : public false_type {}; |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 1, 3> : public false_type {}; |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 2, 3> : public false_type {}; |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 3, 3> : public true_type {}; |
| |
| template <class _T1, class _T2> struct is_convertible : public __is_convertible<_T1, _T2> |
| { |
| static const size_t __complete_check1 = __is_convertible_check<_T1>::__v; |
| static const size_t __complete_check2 = __is_convertible_check<_T2>::__v; |
| }; |
| |
| // is_base_of |
| |
| // (C) Copyright Rani Sharoni 2003. |
| // Use, modification and distribution are subject to the Boost Software License, |
| // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
| // http://www.boost.org/LICENSE_1_0.txt). |
| // |
| // See http://www.boost.org/libs/type_traits for most recent version including documentation. |
| |
| template <class _Bp, class _Dp> |
| struct __is_base_of_tests |
| { |
| template <class _Tp> |
| static char __test(const volatile _Dp*, _Tp); |
| static __two __test(const volatile _Bp*, int); |
| }; |
| |
| template <class _Bp, class _Dp> |
| struct __is_base_of_imp |
| { |
| struct __host |
| { |
| operator const volatile _Bp*() const; |
| operator const volatile _Dp*(); |
| }; |
| |
| static const size_t __complete_check = sizeof(_Dp); |
| static const bool value = sizeof(__is_base_of_tests<_Bp, _Dp>::__test(__host(), 0)) == 1; |
| }; |
| |
| template <class _Bp, class _Dp, bool = is_class<_Bp>::value, |
| bool = is_class<_Dp>::value, |
| bool = is_same<_Bp, _Dp>::value> |
| struct __libcpp_base_of : public false_type {}; |
| |
| template <class _Bp, class _Dp> |
| struct __libcpp_base_of<_Bp, _Dp, true, true, true> : public true_type {}; |
| |
| template <class _Bp, class _Dp> |
| struct __libcpp_base_of<_Bp, _Dp, true, true, false> |
| : public integral_constant<bool, __is_base_of_imp<_Bp, _Dp>::value> {}; |
| |
| template <class _Bp, class _Dp> |
| struct is_base_of |
| : public __libcpp_base_of<typename remove_cv<_Bp>::type, typename remove_cv<_Dp>::type> |
| { |
| }; |
| |
| // is_empty |
| |
| template <class _Tp> |
| struct __is_empty1 |
| : public _Tp |
| { |
| double _; |
| }; |
| |
| struct __is_empty2 |
| { |
| double _; |
| }; |
| |
| template <class _Tp, bool = is_class<_Tp>::value> |
| struct __libcpp_empty : public integral_constant<bool, sizeof(__is_empty1<_Tp>) == sizeof(__is_empty2)> {}; |
| |
| template <class _Tp> struct __libcpp_empty<_Tp, false> : public false_type {}; |
| |
| template <class _Tp> struct is_empty : public __libcpp_empty<_Tp> {}; |
| |
| // is_polymorphic |
| |
| template <class _Tp> struct __is_polymorphic1 : public _Tp {}; |
| template <class _Tp> struct __is_polymorphic2 : public _Tp {virtual ~__is_polymorphic2() throw();}; |
| |
| template <class _Tp, bool = is_class<_Tp>::value> |
| struct __libcpp_polymorphic |
| : public integral_constant<bool, sizeof(__is_polymorphic1<_Tp>) == sizeof(__is_polymorphic2<_Tp>)> {}; |
| |
| template <class _Tp> struct __libcpp_polymorphic<_Tp, false> : public false_type {}; |
| |
| template <class _Tp> struct is_polymorphic : public __libcpp_polymorphic<_Tp> {}; |
| |
| // has_trivial_default_constructor |
| |
| template <class _Tp> struct __has_trivial_default_constructor : public integral_constant<bool, is_scalar<_Tp>::value> {}; |
| |
| template <class _Tp> struct has_trivial_default_constructor |
| : public __has_trivial_default_constructor<typename remove_all_extents<_Tp>::type> {}; |
| |
| // has_nothrow_default_constructor |
| |
| template <class _Tp> struct has_nothrow_default_constructor : public has_trivial_default_constructor<_Tp> {}; |
| |
| // has_trivial_copy_constructor |
| |
| template <class _Tp> struct __has_trivial_copy_constructor : public integral_constant<bool, is_scalar<_Tp>::value || |
| is_reference<_Tp>::value> {}; |
| |
| template <class _Tp> struct has_trivial_copy_constructor |
| : public __has_trivial_copy_constructor<typename remove_all_extents<_Tp>::type> {}; |
| |
| // has_nothrow_copy_constructor |
| |
| template <class _Tp> struct has_nothrow_copy_constructor : public has_trivial_copy_constructor<_Tp> {}; |
| |
| // has_nothrow_move_constructor |
| |
| template <class _Tp> struct has_nothrow_move_constructor : public has_nothrow_copy_constructor<_Tp> {}; |
| |
| // has_copy_constructor |
| |
| template <class _Tp> struct has_copy_constructor : public true_type {}; |
| |
| // has_trivial_copy_assign |
| |
| template <class _Tp> struct __libcpp_trivial_copy_assign : public integral_constant<bool, !is_const<_Tp>::value && |
| is_scalar<_Tp>::value> {}; |
| |
| template <class _Tp> struct has_trivial_copy_assign |
| : public __libcpp_trivial_copy_assign<typename remove_all_extents<_Tp>::type> {}; |
| |
| // has_nothrow_copy_assign |
| |
| template <class _Tp> struct has_nothrow_copy_assign: public has_trivial_copy_assign<_Tp> {}; |
| |
| // has_trivial_destructor |
| |
| template <class _Tp> struct __libcpp_trivial_destructor : public integral_constant<bool, is_scalar<_Tp>::value || |
| is_reference<_Tp>::value> {}; |
| |
| template <class _Tp> struct has_trivial_destructor |
| : public __libcpp_trivial_destructor<typename remove_all_extents<_Tp>::type> {}; |
| |
| // has_virtual_destructor |
| |
| template <class _Tp> struct has_virtual_destructor : public false_type {}; |
| |
| // is_pod |
| |
| template <class _Tp> struct is_pod : public integral_constant<bool, has_trivial_default_constructor<_Tp>::value && |
| has_trivial_copy_constructor<_Tp>::value && |
| has_trivial_copy_assign<_Tp>::value && |
| has_trivial_destructor<_Tp>::value> {}; |
| |
| // alignment_of |
| |
| template <class _Tp> struct __alignment_of {_Tp _;}; |
| |
| template <class _Tp> struct alignment_of |
| : public integral_constant<size_t, __alignof__(__alignment_of<typename remove_all_extents<_Tp>::type>)> {}; |
| |
| // aligned_storage |
| |
| template <class _Hp, class _Tp> |
| struct __type_list |
| { |
| typedef _Hp _Head; |
| typedef _Tp _Tail; |
| }; |
| |
| struct __nat {}; |
| |
| template <class _Tp> |
| struct __align_type |
| { |
| static const size_t value = alignment_of<_Tp>::value; |
| typedef _Tp type; |
| }; |
| |
| struct __struct_double {long double _;}; |
| struct __struct_double4 {double _[4];}; |
| |
| typedef |
| __type_list<__align_type<unsigned char>, |
| __type_list<__align_type<unsigned short>, |
| __type_list<__align_type<unsigned int>, |
| __type_list<__align_type<unsigned long>, |
| __type_list<__align_type<unsigned long long>, |
| __type_list<__align_type<double>, |
| __type_list<__align_type<long double>, |
| __type_list<__align_type<__struct_double>, |
| __type_list<__align_type<__struct_double4>, |
| __type_list<__align_type<int*>, |
| __nat |
| > > > > > > > > > > __all_types; |
| |
| template <class _TL, size_t _Align> struct __find_pod; |
| |
| template <class _Hp, size_t _Align> |
| struct __find_pod<__type_list<_Hp, __nat>, _Align> |
| { |
| typedef typename conditional< |
| _Align == _Hp::value, |
| typename _Hp::type, |
| void |
| >::type type; |
| }; |
| |
| template <class _Hp, class _Tp, size_t _Align> |
| struct __find_pod<__type_list<_Hp, _Tp>, _Align> |
| { |
| typedef typename conditional< |
| _Align == _Hp::value, |
| typename _Hp::type, |
| typename __find_pod<_Tp, _Align>::type |
| >::type type; |
| }; |
| |
| template <class _TL, size_t _Len> struct __find_max_align; |
| |
| template <class _Hp, size_t _Len> |
| struct __find_max_align<__type_list<_Hp, __nat>, _Len> : public integral_constant<size_t, _Hp::value> {}; |
| |
| template <size_t _Len, size_t _A1, size_t _A2> |
| struct __select_align |
| { |
| private: |
| static const size_t __min = _A2 < _A1 ? _A2 : _A1; |
| static const size_t __max = _A1 < _A2 ? _A2 : _A1; |
| public: |
| static const size_t value = _Len < __max ? __min : __max; |
| }; |
| |
| template <class _Hp, class _Tp, size_t _Len> |
| struct __find_max_align<__type_list<_Hp, _Tp>, _Len> |
| : public integral_constant<size_t, __select_align<_Len, _Hp::value, __find_max_align<_Tp, _Len>::value>::value> {}; |
| |
| template <size_t _Len, const size_t _Align = __find_max_align<__all_types, _Len>::value> |
| struct aligned_storage |
| { |
| typedef typename __find_pod<__all_types, _Align>::type _Aligner; |
| static_assert(!is_void<_Aligner>::value, ""); |
| union type |
| { |
| _Aligner __align; |
| unsigned char __data[_Len]; |
| }; |
| }; |
| |
| #define _CREATE_ALIGNED_STORAGE_SPECIALIZATION(n) \ |
| template <size_t _Len>\ |
| struct aligned_storage<_Len, n>\ |
| {\ |
| struct type\ |
| {\ |
| unsigned char _[_Len];\ |
| } __attribute__((__aligned__(n)));\ |
| } |
| |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x1); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x2); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x4); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x8); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x10); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x20); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x40); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x80); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x100); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x200); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x400); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x800); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x1000); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x2000); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x4000); |
| |
| #undef _CREATE_ALIGNED_STORAGE_SPECIALIZATION |
| |
| // __promote |
| |
| template <class _A1, class _A2 = void, class _A3 = void, |
| bool = (is_arithmetic<_A1>::value || is_void<_A1>::value) && |
| (is_arithmetic<_A2>::value || is_void<_A2>::value) && |
| (is_arithmetic<_A3>::value || is_void<_A3>::value)> |
| class __promote {}; |
| |
| |
| template <class _A1, class _A2, class _A3> |
| class __promote<_A1, _A2, _A3, true> |
| { |
| private: |
| typedef typename __promote<_A1>::type __type1; |
| typedef typename __promote<_A2>::type __type2; |
| typedef typename __promote<_A3>::type __type3; |
| public: |
| typedef __typeof__(__type1() + __type2() + __type3()) type; |
| }; |
| |
| template <class _A1, class _A2> |
| class __promote<_A1, _A2, void, true> |
| { |
| private: |
| typedef typename __promote<_A1>::type __type1; |
| typedef typename __promote<_A2>::type __type2; |
| public: |
| typedef __typeof__(__type1() + __type2()) type; |
| }; |
| |
| template <class _A1> |
| class __promote<_A1, void, void, true> |
| { |
| public: |
| typedef typename conditional<is_arithmetic<_A1>::value, |
| typename conditional<is_integral<_A1>::value, double, _A1>::type, |
| void |
| >::type type; |
| }; |
| |
| #ifdef _LIBCPP_STORE_AS_OPTIMIZATION |
| |
| // __transform |
| |
| template <class _Tp, size_t = sizeof(_Tp), bool = is_scalar<_Tp>::value> struct __transform {typedef _Tp type;}; |
| template <class _Tp> struct __transform<_Tp, 1, true> {typedef unsigned char type;}; |
| template <class _Tp> struct __transform<_Tp, 2, true> {typedef unsigned short type;}; |
| template <class _Tp> struct __transform<_Tp, 4, true> {typedef unsigned int type;}; |
| template <class _Tp> struct __transform<_Tp, 8, true> {typedef unsigned long long type;}; |
| |
| #endif // _LIBCPP_STORE_AS_OPTIMIZATION |
| |
| // make_signed / make_unsigned |
| |
| typedef |
| __type_list<signed char, |
| __type_list<signed short, |
| __type_list<signed int, |
| __type_list<signed long, |
| __type_list<signed long long, |
| __nat |
| > > > > > __signed_types; |
| |
| typedef |
| __type_list<unsigned char, |
| __type_list<unsigned short, |
| __type_list<unsigned int, |
| __type_list<unsigned long, |
| __type_list<unsigned long long, |
| __nat |
| > > > > > __unsigned_types; |
| |
| template <class _TypeList, size_t _Size, bool = _Size <= sizeof(typename _TypeList::_Head)> struct __find_first; |
| |
| template <class _Hp, class _Tp, size_t _Size> |
| struct __find_first<__type_list<_Hp, _Tp>, _Size, true> |
| { |
| typedef _Hp type; |
| }; |
| |
| template <class _Hp, class _Tp, size_t _Size> |
| struct __find_first<__type_list<_Hp, _Tp>, _Size, false> |
| { |
| typedef typename __find_first<_Tp, _Size>::type type; |
| }; |
| |
| template <class _Tp, class _Up, bool = is_const<typename remove_reference<_Tp>::type>::value, |
| bool = is_volatile<typename remove_reference<_Tp>::type>::value> |
| struct __apply_cv |
| { |
| typedef _Up type; |
| }; |
| |
| template <class _Tp, class _Up> |
| struct __apply_cv<_Tp, _Up, true, false> |
| { |
| typedef const _Up type; |
| }; |
| |
| template <class _Tp, class _Up> |
| struct __apply_cv<_Tp, _Up, false, true> |
| { |
| typedef volatile _Up type; |
| }; |
| |
| template <class _Tp, class _Up> |
| struct __apply_cv<_Tp, _Up, true, true> |
| { |
| typedef const volatile _Up type; |
| }; |
| |
| template <class _Tp, class _Up> |
| struct __apply_cv<_Tp&, _Up, false, false> |
| { |
| typedef _Up& type; |
| }; |
| |
| template <class _Tp, class _Up> |
| struct __apply_cv<_Tp&, _Up, true, false> |
| { |
| typedef const _Up& type; |
| }; |
| |
| template <class _Tp, class _Up> |
| struct __apply_cv<_Tp&, _Up, false, true> |
| { |
| typedef volatile _Up& type; |
| }; |
| |
| template <class _Tp, class _Up> |
| struct __apply_cv<_Tp&, _Up, true, true> |
| { |
| typedef const volatile _Up& type; |
| }; |
| |
| template <class _Tp, bool = is_integral<_Tp>::value || is_enum<_Tp>::value> |
| struct __make_signed {}; |
| |
| template <class _Tp> |
| struct __make_signed<_Tp, true> |
| { |
| typedef typename __find_first<__signed_types, sizeof(_Tp)>::type type; |
| }; |
| |
| template <> struct __make_signed<bool, true> {}; |
| template <> struct __make_signed< signed short, true> {typedef short type;}; |
| template <> struct __make_signed<unsigned short, true> {typedef short type;}; |
| template <> struct __make_signed< signed int, true> {typedef int type;}; |
| template <> struct __make_signed<unsigned int, true> {typedef int type;}; |
| template <> struct __make_signed< signed long, true> {typedef long type;}; |
| template <> struct __make_signed<unsigned long, true> {typedef long type;}; |
| template <> struct __make_signed< signed long long, true> {typedef long long type;}; |
| template <> struct __make_signed<unsigned long long, true> {typedef long long type;}; |
| |
| template <class _Tp> |
| struct make_signed |
| { |
| typedef typename __apply_cv<_Tp, typename __make_signed<typename remove_cv<_Tp>::type>::type>::type type; |
| }; |
| |
| template <class _Tp, bool = is_integral<_Tp>::value || is_enum<_Tp>::value> |
| struct __make_unsigned {}; |
| |
| template <class _Tp> |
| struct __make_unsigned<_Tp, true> |
| { |
| typedef typename __find_first<__unsigned_types, sizeof(_Tp)>::type type; |
| }; |
| |
| template <> struct __make_unsigned<bool, true> {}; |
| template <> struct __make_unsigned< signed short, true> {typedef unsigned short type;}; |
| template <> struct __make_unsigned<unsigned short, true> {typedef unsigned short type;}; |
| template <> struct __make_unsigned< signed int, true> {typedef unsigned int type;}; |
| template <> struct __make_unsigned<unsigned int, true> {typedef unsigned int type;}; |
| template <> struct __make_unsigned< signed long, true> {typedef unsigned long type;}; |
| template <> struct __make_unsigned<unsigned long, true> {typedef unsigned long type;}; |
| template <> struct __make_unsigned< signed long long, true> {typedef unsigned long long type;}; |
| template <> struct __make_unsigned<unsigned long long, true> {typedef unsigned long long type;}; |
| |
| template <class _Tp> |
| struct make_unsigned |
| { |
| typedef typename __apply_cv<_Tp, typename __make_unsigned<typename remove_cv<_Tp>::type>::type>::type type; |
| }; |
| |
| #ifdef _LIBCPP_HAS_NO_VARIADICS |
| |
| template <class _Tp, class _Up = void, class V = void> |
| struct common_type |
| { |
| public: |
| typedef typename common_type<typename common_type<_Tp, _Up>::type, V>::type type; |
| }; |
| |
| |
| template <class _Tp> |
| struct common_type<_Tp, void, void> |
| { |
| public: |
| typedef _Tp type; |
| }; |
| |
| template <class _Tp, class _Up> |
| struct common_type<_Tp, _Up, void> |
| { |
| private: |
| #ifdef _LIBCPP_MOVE |
| static _Tp&& __t(); |
| static _Up&& __u(); |
| #else |
| static _Tp __t(); |
| static _Up __u(); |
| static bool __f(); |
| #endif |
| public: |
| typedef __typeof__(__f() ? __t() : __u()) type; |
| }; |
| |
| #else |
| |
| template <class ..._Tp> struct common_type; |
| |
| template <class _Tp> |
| struct common_type<_Tp> |
| { |
| typedef _Tp type; |
| }; |
| |
| template <class _Tp, class _Up> |
| struct common_type<_Tp, _Up> |
| { |
| private: |
| static _Tp&& __t(); |
| static _Up&& __u(); |
| static bool __f(); |
| public: |
| typedef decltype(__f() ? __t() : __u()) type; |
| }; |
| |
| template <class _Tp, class _Up, class ..._Vp> |
| struct common_type<_Tp, _Up, _Vp...> |
| { |
| typedef typename common_type<typename common_type<_Tp, _Up>::type, _Vp...>::type type; |
| }; |
| |
| #endif |
| |
| // move |
| |
| #ifdef _LIBCPP_MOVE |
| |
| template <class _Tp> |
| inline _LIBCPP_INLINE_VISIBILITY |
| typename remove_reference<_Tp>::type&& |
| move(_Tp&& __t) {return __t;} |
| |
| template <class _Tp, class _Up, |
| class = typename _STD::enable_if< |
| is_lvalue_reference<_Tp>::value ? is_lvalue_reference<_Up>::value : true |
| >::type, |
| class = typename _STD::enable_if< |
| is_convertible<typename remove_reference<_Up>::type*, |
| typename remove_reference<_Tp>::type*>::value>::type> |
| inline _LIBCPP_INLINE_VISIBILITY |
| _Tp&& |
| forward(_Up&& __t) |
| { |
| return __t; // to quiet spurious warning |
| // return static_cast<_Tp&&>(__t); |
| } |
| |
| #else // _LIBCPP_MOVE |
| |
| template <class _Tp> |
| class __rv |
| { |
| typedef typename remove_reference<_Tp>::type _Trr; |
| _Trr& t_; |
| public: |
| _Trr* operator->() {return &t_;} |
| explicit __rv(_Trr& __t) : t_(__t) {} |
| }; |
| |
| template <class _Tp> |
| inline |
| typename enable_if |
| < |
| !is_convertible<_Tp, __rv<_Tp> >::value, |
| _Tp& |
| >::type |
| move(_Tp& __t) |
| { |
| return __t; |
| } |
| |
| template <class _Tp> |
| inline |
| typename enable_if |
| < |
| is_convertible<_Tp, __rv<_Tp> >::value, |
| _Tp |
| >::type |
| move(_Tp& __t) |
| { |
| return _Tp(__rv<_Tp>(__t)); |
| } |
| |
| template <class _Tp, class _Up> |
| inline |
| typename enable_if |
| < |
| !is_convertible<_Tp, __rv<_Tp> >::value, |
| typename add_lvalue_reference<_Tp>::type |
| >::type |
| forward(_Up& __t) |
| { |
| return __t; |
| } |
| |
| template <class _Tp, class _Up> |
| inline |
| typename enable_if |
| < |
| !is_convertible<_Tp, __rv<_Tp> >::value, |
| typename add_lvalue_reference<_Tp>::type |
| >::type |
| forward(const _Up& __t) |
| { |
| return __t; |
| } |
| |
| template <class _Tp, class _Up> |
| inline |
| typename enable_if |
| < |
| is_convertible<_Tp, __rv<_Tp> >::value, |
| _Tp |
| >::type |
| forward(_Up& __t) |
| { |
| return _Tp(__rv<_Tp>(__t)); |
| } |
| |
| template <class _Tp, class _Up> |
| inline |
| typename enable_if |
| < |
| is_convertible<_Tp, __rv<_Tp> >::value, |
| _Tp |
| >::type |
| forward(const _Up& __t) |
| { |
| return _Tp(__rv<_Tp>(__t)); |
| } |
| |
| #endif // _LIBCPP_MOVE |
| |
| #ifdef _LIBCPP_MOVE |
| |
| template <class _Tp> |
| typename add_rvalue_reference<_Tp>::type |
| declval(); |
| |
| #else |
| |
| template <class _Tp> |
| typename add_lvalue_reference<_Tp>::type |
| declval(); |
| |
| #endif |
| |
| template <class _Tp> |
| struct decay |
| { |
| private: |
| typedef typename remove_reference<_Tp>::type _Up; |
| public: |
| typedef typename conditional |
| < |
| is_array<_Up>::value, |
| typename remove_extent<_Up>::type*, |
| typename conditional |
| < |
| is_function<_Up>::value, |
| typename add_pointer<_Up>::type, |
| typename remove_cv<_Up>::type |
| >::type |
| >::type type; |
| }; |
| |
| // result_of |
| |
| template <class> class result_of; |
| |
| template <class _Fn, bool> |
| class __result_of |
| { |
| }; |
| |
| #ifndef _LIBCPP_HAS_NO_VARIADICS |
| |
| template <class _Fn, class ..._ArgTypes> |
| class __result_of<_Fn(_ArgTypes...), true> |
| { |
| public: |
| typedef decltype(declval<_Fn>()(declval<_ArgTypes>()...)) type; |
| }; |
| |
| template <class _Fn, class ..._ArgTypes> |
| class result_of<_Fn(_ArgTypes...)> |
| : public __result_of<_Fn(_ArgTypes...), |
| is_class<typename remove_reference<_Fn>::type>::value || |
| is_function<typename remove_pointer< |
| typename remove_reference<_Fn>::type |
| >::type |
| >::value |
| > |
| { |
| }; |
| |
| #else |
| |
| template <class _Fn> |
| class __result_of<_Fn(), true> |
| { |
| public: |
| typedef decltype(declval<_Fn>()()) type; |
| }; |
| |
| template <class _Fn, class _A0> |
| class __result_of<_Fn(_A0), true> |
| { |
| public: |
| typedef decltype(declval<_Fn>()(declval<_A0>())) type; |
| }; |
| |
| template <class _Fn, class _A0, class _A1> |
| class __result_of<_Fn(_A0, _A1), true> |
| { |
| public: |
| typedef decltype(declval<_Fn>()(declval<_A0>(), declval<_A1>())) type; |
| }; |
| |
| template <class _Fn, class _A0, class _A1, class _A2> |
| class __result_of<_Fn(_A0, _A1, _A2), true> |
| { |
| public: |
| typedef decltype(declval<_Fn>()(declval<_A0>(), declval<_A1>(), declval<_A2>())) type; |
| }; |
| |
| template <class _Fn> |
| class result_of<_Fn()> |
| : public __result_of<_Fn(), |
| is_class<typename remove_reference<_Fn>::type>::value || |
| is_function<typename remove_pointer< |
| typename remove_reference<_Fn>::type |
| >::type |
| >::value |
| > |
| { |
| }; |
| |
| template <class _Fn, class _A0> |
| class result_of<_Fn(_A0)> |
| : public __result_of<_Fn(_A0), |
| is_class<typename remove_reference<_Fn>::type>::value || |
| is_function<typename remove_pointer< |
| typename remove_reference<_Fn>::type |
| >::type |
| >::value |
| > |
| { |
| }; |
| |
| template <class _Fn, class _A0, class _A1> |
| class result_of<_Fn(_A0, _A1)> |
| : public __result_of<_Fn(_A0, _A1), |
| is_class<typename remove_reference<_Fn>::type>::value || |
| is_function<typename remove_pointer< |
| typename remove_reference<_Fn>::type |
| >::type |
| >::value |
| > |
| { |
| }; |
| |
| template <class _Fn, class _A0, class _A1, class _A2> |
| class result_of<_Fn(_A0, _A1, _A2)> |
| : public __result_of<_Fn(_A0, _A1, _A2), |
| is_class<typename remove_reference<_Fn>::type>::value || |
| is_function<typename remove_pointer< |
| typename remove_reference<_Fn>::type |
| >::type |
| >::value |
| > |
| { |
| }; |
| |
| #endif |
| |
| #ifndef _LIBCPP_HAS_NO_ADVANCED_SFINAE |
| |
| // template <class T, class... Args> struct is_constructible; |
| |
| // main is_constructible test |
| |
| template <class _Tp, class ..._Args> |
| decltype(_STD::move(_Tp(_STD::declval<_Args>()...)), true_type()) |
| __is_constructible_test(_Tp&&, _Args&& ...); |
| |
| struct __any |
| { |
| __any(...); |
| }; |
| |
| template <class ..._Args> |
| false_type |
| __is_constructible_test(__any, _Args&& ...); |
| |
| template <bool, class _Tp, class... _Args> |
| struct __is_constructible // false, _Tp is not a scalar |
| : public common_type |
| < |
| decltype(__is_constructible_test(declval<_Tp>(), declval<_Args>()...)) |
| >::type |
| {}; |
| |
| // function types are not constructible |
| |
| template <class _R, class... _A1, class... _A2> |
| struct __is_constructible<false, _R(_A1...), _A2...> |
| : public false_type |
| {}; |
| |
| // handle scalars and reference types |
| |
| // Scalars are default constructible, references are not |
| |
| template <class _Tp> |
| struct __is_constructible<true, _Tp> |
| : public is_scalar<_Tp> |
| {}; |
| |
| // Scalars and references are constructible from one arg if that arg is |
| // implicitly convertible to the scalar or reference. |
| |
| template <class _Tp> |
| struct __is_constructible_ref |
| { |
| true_type static __(_Tp); |
| false_type static __(...); |
| }; |
| |
| template <class _Tp, class _A0> |
| struct __is_constructible<true, _Tp, _A0> |
| : public common_type |
| < |
| decltype(__is_constructible_ref<_Tp>::__(declval<_A0>())) |
| >::type |
| {}; |
| |
| // Scalars and references are not constructible from multiple args. |
| |
| template <class _Tp, class _A0, class ..._Args> |
| struct __is_constructible<true, _Tp, _A0, _Args...> |
| : public false_type |
| {}; |
| |
| // Treat scalars and reference types separately |
| |
| template <bool, class _Tp, class... _Args> |
| struct __is_constructible_void_check |
| : public __is_constructible<is_scalar<_Tp>::value || is_reference<_Tp>::value, |
| _Tp, _Args...> |
| {}; |
| |
| // If any of T or Args is void, is_constructible should be false |
| |
| template <class _Tp, class... _Args> |
| struct __is_constructible_void_check<true, _Tp, _Args...> |
| : public false_type |
| {}; |
| |
| template <class ..._Args> struct __constains_void; |
| |
| template <> struct __constains_void<> : false_type {}; |
| |
| template <class _A0, class ..._Args> |
| struct __constains_void<_A0, _Args...> |
| { |
| static const bool value = is_void<_A0>::value || |
| __constains_void<_Args...>::value; |
| }; |
| |
| // is_constructible entry point |
| |
| template <class _Tp, class... _Args> |
| struct is_constructible |
| : public __is_constructible_void_check<__constains_void<_Tp, _Args...>::value, |
| _Tp, _Args...> |
| {}; |
| |
| // Array types are default constructible if their element type |
| // is default constructible |
| |
| template <class _A, size_t _N> |
| struct __is_constructible<false, _A[_N]> |
| : public is_constructible<typename remove_all_extents<_A>::type> |
| {}; |
| |
| // Otherwise array types are not constructible by this syntax |
| |
| template <class _A, size_t _N, class ..._Args> |
| struct __is_constructible<false, _A[_N], _Args...> |
| : public false_type |
| {}; |
| |
| // Incomplete array types are not constructible |
| |
| template <class _A, class ..._Args> |
| struct __is_constructible<false, _A[], _Args...> |
| : public false_type |
| {}; |
| |
| #endif |
| |
| template <class _Tp> struct __is_zero_default_constructible |
| : public integral_constant<bool, is_scalar<_Tp>::value || is_empty<_Tp>::value> {}; |
| |
| template <class _Tp> |
| inline _LIBCPP_INLINE_VISIBILITY |
| void |
| swap(_Tp& __x, _Tp& __y) |
| { |
| _Tp __t(_STD::move(__x)); |
| __x = _STD::move(__y); |
| __y = _STD::move(__t); |
| } |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP_TYPE_TRAITS |