// C++11 <type_traits> -*- C++ -*-
-// Copyright (C) 2007-2015 Free Software Foundation, Inc.
+// Copyright (C) 2007-2019 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
#include <bits/c++config.h>
-#ifdef _GLIBCXX_USE_C99_STDINT_TR1
-# if defined (__UINT_LEAST16_TYPE__) && defined(__UINT_LEAST32_TYPE__)
-namespace std
-{
- typedef __UINT_LEAST16_TYPE__ uint_least16_t;
- typedef __UINT_LEAST32_TYPE__ uint_least32_t;
-}
-# else
-# include <cstdint>
-# endif
-#endif
-
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
static constexpr _Tp value = __v;
typedef _Tp value_type;
typedef integral_constant<_Tp, __v> type;
- constexpr operator value_type() const { return value; }
+ constexpr operator value_type() const noexcept { return value; }
#if __cplusplus > 201103L
#define __cpp_lib_integral_constant_callable 201304
- constexpr value_type operator()() const { return value; }
+ constexpr value_type operator()() const noexcept { return value; }
#endif
};
-
+
template<typename _Tp, _Tp __v>
constexpr _Tp integral_constant<_Tp, __v>::value;
template<bool __v>
using __bool_constant = integral_constant<bool, __v>;
+#if __cplusplus > 201402L
+# define __cpp_lib_bool_constant 201505
+ template<bool __v>
+ using bool_constant = integral_constant<bool, __v>;
+#endif
+
// Meta programming helper types.
template<bool, typename, typename>
struct conditional;
+ template <typename _Type>
+ struct __type_identity {
+ using type = _Type;
+ };
+
template<typename...>
struct __or_;
template<typename _Pp>
struct __not_
- : public integral_constant<bool, !_Pp::value>
+ : public __bool_constant<!bool(_Pp::value)>
+ { };
+
+#if __cplusplus >= 201703L
+
+ template<typename... _Bn>
+ inline constexpr bool __or_v = __or_<_Bn...>::value;
+ template<typename... _Bn>
+ inline constexpr bool __and_v = __and_<_Bn...>::value;
+
+#define __cpp_lib_logical_traits 201510
+
+ template<typename... _Bn>
+ struct conjunction
+ : __and_<_Bn...>
+ { };
+
+ template<typename... _Bn>
+ struct disjunction
+ : __or_<_Bn...>
{ };
+ template<typename _Pp>
+ struct negation
+ : __not_<_Pp>
+ { };
+
+ template<typename... _Bn>
+ inline constexpr bool conjunction_v = conjunction<_Bn...>::value;
+
+ template<typename... _Bn>
+ inline constexpr bool disjunction_v = disjunction<_Bn...>::value;
+
+ template<typename _Pp>
+ inline constexpr bool negation_v = negation<_Pp>::value;
+
+#endif // C++17
+
+ // Forward declarations
+ template<typename>
+ struct is_reference;
+ template<typename>
+ struct is_function;
+ template<typename>
+ struct is_void;
+ template<typename>
+ struct __is_array_unknown_bounds;
+
+ // Helper functions that return false_type for incomplete classes,
+ // incomplete unions and arrays of known bound from those.
+
+ template <typename _T, size_t = sizeof(_T)>
+ constexpr true_type __is_complete_or_unbounded(__type_identity<_T>)
+ { return {}; }
+
+ template <typename _TypeIdentity,
+ typename _NestedType = typename _TypeIdentity::type>
+ constexpr typename __or_<
+ is_reference<_NestedType>,
+ is_function<_NestedType>,
+ is_void<_NestedType>,
+ __is_array_unknown_bounds<_NestedType>
+ >::type __is_complete_or_unbounded(_TypeIdentity)
+ { return {}; }
+
// For several sfinae-friendly trait implementations we transport both the
// result information (as the member type) and the failure information (no
// member type). This is very similar to std::enable_if, but we cannot use
template<>
struct __is_integral_helper<bool>
: public true_type { };
-
+
template<>
struct __is_integral_helper<char>
: public true_type { };
: public true_type { };
#endif
+#ifdef _GLIBCXX_USE_CHAR8_T
+ template<>
+ struct __is_integral_helper<char8_t>
+ : public true_type { };
+#endif
+
template<>
struct __is_integral_helper<char16_t>
: public true_type { };
struct is_rvalue_reference<_Tp&&>
: public true_type { };
- template<typename>
- struct is_function;
-
template<typename>
struct __is_member_object_pointer_helper
: public false_type { };
template<typename _Tp, typename _Cp>
struct __is_member_object_pointer_helper<_Tp _Cp::*>
- : public integral_constant<bool, !is_function<_Tp>::value> { };
+ : public __not_<is_function<_Tp>>::type { };
/// is_member_object_pointer
template<typename _Tp>
template<typename _Tp, typename _Cp>
struct __is_member_function_pointer_helper<_Tp _Cp::*>
- : public integral_constant<bool, is_function<_Tp>::value> { };
+ : public is_function<_Tp>::type { };
/// is_member_function_pointer
template<typename _Tp>
struct is_function
: public false_type { };
- template<typename _Res, typename... _ArgTypes>
- struct is_function<_Res(_ArgTypes...)>
+ template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
+ struct is_function<_Res(_ArgTypes...) _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
- template<typename _Res, typename... _ArgTypes>
- struct is_function<_Res(_ArgTypes...) &>
+ template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
+ struct is_function<_Res(_ArgTypes...) & _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
- template<typename _Res, typename... _ArgTypes>
- struct is_function<_Res(_ArgTypes...) &&>
+ template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
+ struct is_function<_Res(_ArgTypes...) && _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
- template<typename _Res, typename... _ArgTypes>
- struct is_function<_Res(_ArgTypes......)>
+ template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
+ struct is_function<_Res(_ArgTypes......) _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
- template<typename _Res, typename... _ArgTypes>
- struct is_function<_Res(_ArgTypes......) &>
+ template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
+ struct is_function<_Res(_ArgTypes......) & _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
- template<typename _Res, typename... _ArgTypes>
- struct is_function<_Res(_ArgTypes......) &&>
+ template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
+ struct is_function<_Res(_ArgTypes......) && _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
- template<typename _Res, typename... _ArgTypes>
- struct is_function<_Res(_ArgTypes...) const>
+ template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
+ struct is_function<_Res(_ArgTypes...) const _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
- template<typename _Res, typename... _ArgTypes>
- struct is_function<_Res(_ArgTypes...) const &>
+ template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
+ struct is_function<_Res(_ArgTypes...) const & _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
- template<typename _Res, typename... _ArgTypes>
- struct is_function<_Res(_ArgTypes...) const &&>
+ template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
+ struct is_function<_Res(_ArgTypes...) const && _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
- template<typename _Res, typename... _ArgTypes>
- struct is_function<_Res(_ArgTypes......) const>
+ template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
+ struct is_function<_Res(_ArgTypes......) const _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
- template<typename _Res, typename... _ArgTypes>
- struct is_function<_Res(_ArgTypes......) const &>
+ template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
+ struct is_function<_Res(_ArgTypes......) const & _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
- template<typename _Res, typename... _ArgTypes>
- struct is_function<_Res(_ArgTypes......) const &&>
+ template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
+ struct is_function<_Res(_ArgTypes......) const && _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
- template<typename _Res, typename... _ArgTypes>
- struct is_function<_Res(_ArgTypes...) volatile>
+ template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
+ struct is_function<_Res(_ArgTypes...) volatile _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
- template<typename _Res, typename... _ArgTypes>
- struct is_function<_Res(_ArgTypes...) volatile &>
+ template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
+ struct is_function<_Res(_ArgTypes...) volatile & _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
- template<typename _Res, typename... _ArgTypes>
- struct is_function<_Res(_ArgTypes...) volatile &&>
+ template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
+ struct is_function<_Res(_ArgTypes...) volatile && _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
- template<typename _Res, typename... _ArgTypes>
- struct is_function<_Res(_ArgTypes......) volatile>
+ template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
+ struct is_function<_Res(_ArgTypes......) volatile _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
- template<typename _Res, typename... _ArgTypes>
- struct is_function<_Res(_ArgTypes......) volatile &>
+ template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
+ struct is_function<_Res(_ArgTypes......) volatile & _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
- template<typename _Res, typename... _ArgTypes>
- struct is_function<_Res(_ArgTypes......) volatile &&>
+ template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
+ struct is_function<_Res(_ArgTypes......) volatile && _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
- template<typename _Res, typename... _ArgTypes>
- struct is_function<_Res(_ArgTypes...) const volatile>
+ template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
+ struct is_function<_Res(_ArgTypes...) const volatile _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
- template<typename _Res, typename... _ArgTypes>
- struct is_function<_Res(_ArgTypes...) const volatile &>
+ template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
+ struct is_function<_Res(_ArgTypes...) const volatile & _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
- template<typename _Res, typename... _ArgTypes>
- struct is_function<_Res(_ArgTypes...) const volatile &&>
+ template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
+ struct is_function<_Res(_ArgTypes...) const volatile && _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
- template<typename _Res, typename... _ArgTypes>
- struct is_function<_Res(_ArgTypes......) const volatile>
+ template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
+ struct is_function<_Res(_ArgTypes......) const volatile _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
- template<typename _Res, typename... _ArgTypes>
- struct is_function<_Res(_ArgTypes......) const volatile &>
+ template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
+ struct is_function<_Res(_ArgTypes......) const volatile & _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
- template<typename _Res, typename... _ArgTypes>
- struct is_function<_Res(_ArgTypes......) const volatile &&>
+ template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
+ struct is_function<_Res(_ArgTypes......) const volatile && _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
#define __cpp_lib_is_null_pointer 201309
/// is_compound
template<typename _Tp>
struct is_compound
- : public integral_constant<bool, !is_fundamental<_Tp>::value> { };
+ : public __not_<is_fundamental<_Tp>>::type { };
template<typename _Tp>
struct __is_member_pointer_helper
: public __or_<is_object<_Tp>, is_reference<_Tp>>::type
{ };
- template<typename _Res, typename... _Args>
- struct __is_referenceable<_Res(_Args...)>
+ template<typename _Res, typename... _Args _GLIBCXX_NOEXCEPT_PARM>
+ struct __is_referenceable<_Res(_Args...) _GLIBCXX_NOEXCEPT_QUAL>
: public true_type
{ };
- template<typename _Res, typename... _Args>
- struct __is_referenceable<_Res(_Args......)>
+ template<typename _Res, typename... _Args _GLIBCXX_NOEXCEPT_PARM>
+ struct __is_referenceable<_Res(_Args......) _GLIBCXX_NOEXCEPT_QUAL>
: public true_type
{ };
template<typename _Tp>
struct is_const<_Tp const>
: public true_type { };
-
+
/// is_volatile
template<typename>
struct is_volatile
template<typename _Tp>
struct is_trivial
: public integral_constant<bool, __is_trivial(_Tp)>
- { };
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
// is_trivially_copyable
template<typename _Tp>
struct is_trivially_copyable
: public integral_constant<bool, __is_trivially_copyable(_Tp)>
- { };
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
/// is_standard_layout
template<typename _Tp>
struct is_standard_layout
: public integral_constant<bool, __is_standard_layout(_Tp)>
- { };
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
/// is_pod
// Could use is_standard_layout && is_trivial instead of the builtin.
template<typename _Tp>
struct is_pod
: public integral_constant<bool, __is_pod(_Tp)>
- { };
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
/// is_literal_type
template<typename _Tp>
struct is_literal_type
: public integral_constant<bool, __is_literal_type(_Tp)>
- { };
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
/// is_empty
template<typename _Tp>
/// is_unsigned
template<typename _Tp>
struct is_unsigned
- : public __and_<is_arithmetic<_Tp>, __not_<is_signed<_Tp>>>::type
+ : public __and_<is_arithmetic<_Tp>, __not_<is_signed<_Tp>>>
{ };
// Destructible and constructible type properties.
- template<typename>
- struct add_rvalue_reference;
-
/**
* @brief Utility to simplify expressions used in unevaluated operands
* @ingroup utilities
*/
+
+ template<typename _Tp, typename _Up = _Tp&&>
+ _Up
+ __declval(int);
+
+ template<typename _Tp>
+ _Tp
+ __declval(long);
+
template<typename _Tp>
- typename add_rvalue_reference<_Tp>::type declval() noexcept;
+ auto declval() noexcept -> decltype(__declval<_Tp>(0));
template<typename, unsigned = 0>
struct extent;
template<typename _Tp>
struct __is_array_unknown_bounds
- : public __and_<is_array<_Tp>, __not_<extent<_Tp>>>::type
+ : public __and_<is_array<_Tp>, __not_<extent<_Tp>>>
{ };
-
+
// In N3290 is_destructible does not say anything about function
// types and abstract types, see LWG 2049. This implementation
// describes function types as non-destructible and all complete
template<typename _Tp>
struct is_destructible
: public __is_destructible_safe<_Tp>::type
- { };
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
// is_nothrow_destructible requires that is_destructible is
// satisfied as well. We realize that by mimicing the
struct __do_is_nt_destructible_impl
{
template<typename _Tp>
- static integral_constant<bool, noexcept(declval<_Tp&>().~_Tp())>
- __test(int);
+ static __bool_constant<noexcept(declval<_Tp&>().~_Tp())>
+ __test(int);
template<typename>
static false_type __test(...);
template<typename _Tp>
struct is_nothrow_destructible
: public __is_nt_destructible_safe<_Tp>::type
- { };
-
- struct __do_is_default_constructible_impl
- {
- template<typename _Tp, typename = decltype(_Tp())>
- static true_type __test(int);
-
- template<typename>
- static false_type __test(...);
- };
-
- template<typename _Tp>
- struct __is_default_constructible_impl
- : public __do_is_default_constructible_impl
- {
- typedef decltype(__test<_Tp>(0)) type;
- };
-
- template<typename _Tp>
- struct __is_default_constructible_atom
- : public __and_<__not_<is_void<_Tp>>,
- __is_default_constructible_impl<_Tp>>::type
- { };
-
- template<typename _Tp, bool = is_array<_Tp>::value>
- struct __is_default_constructible_safe;
-
- // The following technique is a workaround for a current core language
- // restriction, which does not allow for array types to occur in
- // functional casts of the form T(). Complete arrays can be default-
- // constructed, if the element type is default-constructible, but
- // arrays with unknown bounds are not.
- template<typename _Tp>
- struct __is_default_constructible_safe<_Tp, true>
- : public __and_<__is_array_known_bounds<_Tp>,
- __is_default_constructible_atom<typename
- remove_all_extents<_Tp>::type>>::type
- { };
-
- template<typename _Tp>
- struct __is_default_constructible_safe<_Tp, false>
- : public __is_default_constructible_atom<_Tp>::type
- { };
-
- /// is_default_constructible
- template<typename _Tp>
- struct is_default_constructible
- : public __is_default_constructible_safe<_Tp>::type
- { };
-
-
- // Implementation of is_constructible.
-
- // The hardest part of this trait is the binary direct-initialization
- // case, because we hit into a functional cast of the form T(arg).
- // This implementation uses different strategies depending on the
- // target type to reduce the test overhead as much as possible:
- //
- // a) For a reference target type, we use a static_cast expression
- // modulo its extra cases.
- //
- // b) For a non-reference target type we use a ::new expression.
- struct __do_is_static_castable_impl
- {
- template<typename _From, typename _To, typename
- = decltype(static_cast<_To>(declval<_From>()))>
- static true_type __test(int);
-
- template<typename, typename>
- static false_type __test(...);
- };
-
- template<typename _From, typename _To>
- struct __is_static_castable_impl
- : public __do_is_static_castable_impl
- {
- typedef decltype(__test<_From, _To>(0)) type;
- };
-
- template<typename _From, typename _To>
- struct __is_static_castable_safe
- : public __is_static_castable_impl<_From, _To>::type
- { };
-
- // __is_static_castable
- template<typename _From, typename _To>
- struct __is_static_castable
- : public integral_constant<bool, (__is_static_castable_safe<
- _From, _To>::value)>
- { };
-
- // Implementation for non-reference types. To meet the proper
- // variable definition semantics, we also need to test for
- // is_destructible in this case.
- // This form should be simplified by a single expression:
- // ::delete ::new _Tp(declval<_Arg>()), see c++/51222.
- struct __do_is_direct_constructible_impl
- {
- template<typename _Tp, typename _Arg, typename
- = decltype(::new _Tp(declval<_Arg>()))>
- static true_type __test(int);
-
- template<typename, typename>
- static false_type __test(...);
- };
-
- template<typename _Tp, typename _Arg>
- struct __is_direct_constructible_impl
- : public __do_is_direct_constructible_impl
- {
- typedef decltype(__test<_Tp, _Arg>(0)) type;
- };
-
- template<typename _Tp, typename _Arg>
- struct __is_direct_constructible_new_safe
- : public __and_<is_destructible<_Tp>,
- __is_direct_constructible_impl<_Tp, _Arg>>::type
- { };
-
- template<typename, typename>
- struct is_same;
-
- template<typename, typename>
- struct is_base_of;
-
- template<typename>
- struct remove_reference;
-
- template<typename _From, typename _To, bool
- = __not_<__or_<is_void<_From>,
- is_function<_From>>>::value>
- struct __is_base_to_derived_ref;
-
- // Detect whether we have a downcast situation during
- // reference binding.
- template<typename _From, typename _To>
- struct __is_base_to_derived_ref<_From, _To, true>
- {
- typedef typename remove_cv<typename remove_reference<_From
- >::type>::type __src_t;
- typedef typename remove_cv<typename remove_reference<_To
- >::type>::type __dst_t;
- typedef __and_<__not_<is_same<__src_t, __dst_t>>,
- is_base_of<__src_t, __dst_t>> type;
- static constexpr bool value = type::value;
- };
-
- template<typename _From, typename _To>
- struct __is_base_to_derived_ref<_From, _To, false>
- : public false_type
- { };
-
- template<typename _From, typename _To, bool
- = __and_<is_lvalue_reference<_From>,
- is_rvalue_reference<_To>>::value>
- struct __is_lvalue_to_rvalue_ref;
-
- // Detect whether we have an lvalue of non-function type
- // bound to a reference-compatible rvalue-reference.
- template<typename _From, typename _To>
- struct __is_lvalue_to_rvalue_ref<_From, _To, true>
{
- typedef typename remove_cv<typename remove_reference<
- _From>::type>::type __src_t;
- typedef typename remove_cv<typename remove_reference<
- _To>::type>::type __dst_t;
- typedef __and_<__not_<is_function<__src_t>>,
- __or_<is_same<__src_t, __dst_t>,
- is_base_of<__dst_t, __src_t>>> type;
- static constexpr bool value = type::value;
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
};
- template<typename _From, typename _To>
- struct __is_lvalue_to_rvalue_ref<_From, _To, false>
- : public false_type
- { };
-
- // Here we handle direct-initialization to a reference type as
- // equivalent to a static_cast modulo overshooting conversions.
- // These are restricted to the following conversions:
- // a) A base class value to a derived class reference
- // b) An lvalue to an rvalue-reference of reference-compatible
- // types that are not functions
- template<typename _Tp, typename _Arg>
- struct __is_direct_constructible_ref_cast
- : public __and_<__is_static_castable<_Arg, _Tp>,
- __not_<__or_<__is_base_to_derived_ref<_Arg, _Tp>,
- __is_lvalue_to_rvalue_ref<_Arg, _Tp>
- >>>::type
- { };
-
- template<typename _Tp, typename _Arg>
- struct __is_direct_constructible_new
- : public conditional<is_reference<_Tp>::value,
- __is_direct_constructible_ref_cast<_Tp, _Arg>,
- __is_direct_constructible_new_safe<_Tp, _Arg>
- >::type
- { };
-
- template<typename _Tp, typename _Arg>
- struct __is_direct_constructible
- : public __is_direct_constructible_new<_Tp, _Arg>::type
+ template<typename _Tp, typename... _Args>
+ struct __is_constructible_impl
+ : public __bool_constant<__is_constructible(_Tp, _Args...)>
{ };
- // Since default-construction and binary direct-initialization have
- // been handled separately, the implementation of the remaining
- // n-ary construction cases is rather straightforward. We can use
- // here a functional cast, because array types are excluded anyway
- // and this form is never interpreted as a C cast.
- struct __do_is_nary_constructible_impl
- {
- template<typename _Tp, typename... _Args, typename
- = decltype(_Tp(declval<_Args>()...))>
- static true_type __test(int);
-
- template<typename, typename...>
- static false_type __test(...);
- };
-
+ /// is_constructible
template<typename _Tp, typename... _Args>
- struct __is_nary_constructible_impl
- : public __do_is_nary_constructible_impl
+ struct is_constructible
+ : public __is_constructible_impl<_Tp, _Args...>
{
- typedef decltype(__test<_Tp, _Args...>(0)) type;
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
};
- template<typename _Tp, typename... _Args>
- struct __is_nary_constructible
- : public __is_nary_constructible_impl<_Tp, _Args...>::type
+ /// is_default_constructible
+ template<typename _Tp>
+ struct is_default_constructible
+ : public __is_constructible_impl<_Tp>::type
{
- static_assert(sizeof...(_Args) > 1,
- "Only useful for > 1 arguments");
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
};
- template<typename _Tp, typename... _Args>
- struct __is_constructible_impl
- : public __is_nary_constructible<_Tp, _Args...>
- { };
-
- template<typename _Tp, typename _Arg>
- struct __is_constructible_impl<_Tp, _Arg>
- : public __is_direct_constructible<_Tp, _Arg>
- { };
-
- template<typename _Tp>
- struct __is_constructible_impl<_Tp>
- : public is_default_constructible<_Tp>
- { };
-
- /// is_constructible
- template<typename _Tp, typename... _Args>
- struct is_constructible
- : public __is_constructible_impl<_Tp, _Args...>::type
- { };
-
template<typename _Tp, bool = __is_referenceable<_Tp>::value>
struct __is_copy_constructible_impl;
template<typename _Tp>
struct __is_copy_constructible_impl<_Tp, true>
- : public is_constructible<_Tp, const _Tp&>
+ : public __is_constructible_impl<_Tp, const _Tp&>
{ };
/// is_copy_constructible
template<typename _Tp>
struct is_copy_constructible
: public __is_copy_constructible_impl<_Tp>
- { };
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
template<typename _Tp, bool = __is_referenceable<_Tp>::value>
struct __is_move_constructible_impl;
template<typename _Tp>
struct __is_move_constructible_impl<_Tp, true>
- : public is_constructible<_Tp, _Tp&&>
+ : public __is_constructible_impl<_Tp, _Tp&&>
{ };
/// is_move_constructible
template<typename _Tp>
struct is_move_constructible
: public __is_move_constructible_impl<_Tp>
- { };
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
template<typename _Tp>
struct __is_nt_default_constructible_atom
struct __is_nt_default_constructible_impl<_Tp, true>
: public __and_<__is_array_known_bounds<_Tp>,
__is_nt_default_constructible_atom<typename
- remove_all_extents<_Tp>::type>>::type
+ remove_all_extents<_Tp>::type>>
{ };
template<typename _Tp>
: public __is_nt_default_constructible_atom<_Tp>
{ };
+ template<typename _Tp>
+ using __is_nothrow_default_constructible_impl
+ = __and_<__is_constructible_impl<_Tp>,
+ __is_nt_default_constructible_impl<_Tp>>;
+
/// is_nothrow_default_constructible
template<typename _Tp>
struct is_nothrow_default_constructible
- : public __and_<is_default_constructible<_Tp>,
- __is_nt_default_constructible_impl<_Tp>>::type
- { };
+ : public __is_nothrow_default_constructible_impl<_Tp>::type
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
template<typename _Tp, typename... _Args>
struct __is_nt_constructible_impl
template<typename _Tp>
struct __is_nt_constructible_impl<_Tp>
- : public is_nothrow_default_constructible<_Tp>
+ : public __is_nothrow_default_constructible_impl<_Tp>
+ { };
+
+ template<typename _Tp, typename... _Args>
+ struct __is_nothrow_constructible_impl
+ : public __and_<__is_constructible_impl<_Tp, _Args...>,
+ __is_nt_constructible_impl<_Tp, _Args...>>
{ };
/// is_nothrow_constructible
template<typename _Tp, typename... _Args>
struct is_nothrow_constructible
- : public __and_<is_constructible<_Tp, _Args...>,
- __is_nt_constructible_impl<_Tp, _Args...>>::type
- { };
+ : public __is_nothrow_constructible_impl<_Tp, _Args...>::type
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
template<typename _Tp, bool = __is_referenceable<_Tp>::value>
struct __is_nothrow_copy_constructible_impl;
template<typename _Tp>
struct __is_nothrow_copy_constructible_impl<_Tp, true>
- : public is_nothrow_constructible<_Tp, const _Tp&>
+ : public __is_nothrow_constructible_impl<_Tp, const _Tp&>
{ };
/// is_nothrow_copy_constructible
template<typename _Tp>
struct is_nothrow_copy_constructible
- : public __is_nothrow_copy_constructible_impl<_Tp>
- { };
+ : public __is_nothrow_copy_constructible_impl<_Tp>::type
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
template<typename _Tp, bool = __is_referenceable<_Tp>::value>
struct __is_nothrow_move_constructible_impl;
template<typename _Tp>
struct __is_nothrow_move_constructible_impl<_Tp, true>
- : public is_nothrow_constructible<_Tp, _Tp&&>
+ : public __is_nothrow_constructible_impl<_Tp, _Tp&&>
{ };
/// is_nothrow_move_constructible
template<typename _Tp>
struct is_nothrow_move_constructible
- : public __is_nothrow_move_constructible_impl<_Tp>
- { };
-
- template<typename _Tp, typename _Up>
- class __is_assignable_helper
+ : public __is_nothrow_move_constructible_impl<_Tp>::type
{
- template<typename _Tp1, typename _Up1,
- typename = decltype(declval<_Tp1>() = declval<_Up1>())>
- static true_type
- __test(int);
-
- template<typename, typename>
- static false_type
- __test(...);
-
- public:
- typedef decltype(__test<_Tp, _Up>(0)) type;
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
};
/// is_assignable
template<typename _Tp, typename _Up>
struct is_assignable
- : public __is_assignable_helper<_Tp, _Up>::type
- { };
+ : public __bool_constant<__is_assignable(_Tp, _Up)>
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
template<typename _Tp, bool = __is_referenceable<_Tp>::value>
struct __is_copy_assignable_impl;
template<typename _Tp>
struct __is_copy_assignable_impl<_Tp, true>
- : public is_assignable<_Tp&, const _Tp&>
+ : public __bool_constant<__is_assignable(_Tp&, const _Tp&)>
{ };
/// is_copy_assignable
template<typename _Tp>
struct is_copy_assignable
- : public __is_copy_assignable_impl<_Tp>
- { };
+ : public __is_copy_assignable_impl<_Tp>::type
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
template<typename _Tp, bool = __is_referenceable<_Tp>::value>
struct __is_move_assignable_impl;
template<typename _Tp>
struct __is_move_assignable_impl<_Tp, true>
- : public is_assignable<_Tp&, _Tp&&>
+ : public __bool_constant<__is_assignable(_Tp&, _Tp&&)>
{ };
/// is_move_assignable
template<typename _Tp>
struct is_move_assignable
- : public __is_move_assignable_impl<_Tp>
- { };
+ : public __is_move_assignable_impl<_Tp>::type
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
template<typename _Tp, typename _Up>
struct __is_nt_assignable_impl
: public integral_constant<bool, noexcept(declval<_Tp>() = declval<_Up>())>
{ };
+ template<typename _Tp, typename _Up>
+ struct __is_nothrow_assignable_impl
+ : public __and_<__bool_constant<__is_assignable(_Tp, _Up)>,
+ __is_nt_assignable_impl<_Tp, _Up>>
+ { };
+
/// is_nothrow_assignable
template<typename _Tp, typename _Up>
struct is_nothrow_assignable
- : public __and_<is_assignable<_Tp, _Up>,
- __is_nt_assignable_impl<_Tp, _Up>>::type
- { };
+ : public __is_nothrow_assignable_impl<_Tp, _Up>
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
template<typename _Tp, bool = __is_referenceable<_Tp>::value>
struct __is_nt_copy_assignable_impl;
template<typename _Tp>
struct __is_nt_copy_assignable_impl<_Tp, true>
- : public is_nothrow_assignable<_Tp&, const _Tp&>
+ : public __is_nothrow_assignable_impl<_Tp&, const _Tp&>
{ };
/// is_nothrow_copy_assignable
template<typename _Tp>
struct is_nothrow_copy_assignable
: public __is_nt_copy_assignable_impl<_Tp>
- { };
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
template<typename _Tp, bool = __is_referenceable<_Tp>::value>
struct __is_nt_move_assignable_impl;
template<typename _Tp>
struct __is_nt_move_assignable_impl<_Tp, true>
- : public is_nothrow_assignable<_Tp&, _Tp&&>
+ : public __is_nothrow_assignable_impl<_Tp&, _Tp&&>
{ };
/// is_nothrow_move_assignable
template<typename _Tp>
struct is_nothrow_move_assignable
: public __is_nt_move_assignable_impl<_Tp>
- { };
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
/// is_trivially_constructible
template<typename _Tp, typename... _Args>
struct is_trivially_constructible
- : public __and_<is_constructible<_Tp, _Args...>, integral_constant<bool,
- __is_trivially_constructible(_Tp, _Args...)>>::type
- { };
-
+ : public __bool_constant<__is_trivially_constructible(_Tp, _Args...)>
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
+
/// is_trivially_default_constructible
template<typename _Tp>
struct is_trivially_default_constructible
- : public is_trivially_constructible<_Tp>::type
- { };
+ : public __bool_constant<__is_trivially_constructible(_Tp)>
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
+
+ struct __do_is_implicitly_default_constructible_impl
+ {
+ template <typename _Tp>
+ static void __helper(const _Tp&);
+
+ template <typename _Tp>
+ static true_type __test(const _Tp&,
+ decltype(__helper<const _Tp&>({}))* = 0);
+
+ static false_type __test(...);
+ };
- /// is_trivially_copy_constructible
template<typename _Tp>
- struct is_trivially_copy_constructible
- : public __and_<is_copy_constructible<_Tp>,
+ struct __is_implicitly_default_constructible_impl
+ : public __do_is_implicitly_default_constructible_impl
+ {
+ typedef decltype(__test(declval<_Tp>())) type;
+ };
+
+ template<typename _Tp>
+ struct __is_implicitly_default_constructible_safe
+ : public __is_implicitly_default_constructible_impl<_Tp>::type
+ { };
+
+ template <typename _Tp>
+ struct __is_implicitly_default_constructible
+ : public __and_<__is_constructible_impl<_Tp>,
+ __is_implicitly_default_constructible_safe<_Tp>>
+ { };
+
+ template<typename _Tp, bool = __is_referenceable<_Tp>::value>
+ struct __is_trivially_copy_constructible_impl;
+
+ template<typename _Tp>
+ struct __is_trivially_copy_constructible_impl<_Tp, false>
+ : public false_type { };
+
+ template<typename _Tp>
+ struct __is_trivially_copy_constructible_impl<_Tp, true>
+ : public __and_<__is_copy_constructible_impl<_Tp>,
integral_constant<bool,
- __is_trivially_constructible(_Tp, const _Tp&)>>::type
+ __is_trivially_constructible(_Tp, const _Tp&)>>
{ };
-
- /// is_trivially_move_constructible
+
+ /// is_trivially_copy_constructible
template<typename _Tp>
- struct is_trivially_move_constructible
- : public __and_<is_move_constructible<_Tp>,
+ struct is_trivially_copy_constructible
+ : public __is_trivially_copy_constructible_impl<_Tp>
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
+
+ template<typename _Tp, bool = __is_referenceable<_Tp>::value>
+ struct __is_trivially_move_constructible_impl;
+
+ template<typename _Tp>
+ struct __is_trivially_move_constructible_impl<_Tp, false>
+ : public false_type { };
+
+ template<typename _Tp>
+ struct __is_trivially_move_constructible_impl<_Tp, true>
+ : public __and_<__is_move_constructible_impl<_Tp>,
integral_constant<bool,
- __is_trivially_constructible(_Tp, _Tp&&)>>::type
+ __is_trivially_constructible(_Tp, _Tp&&)>>
{ };
+ /// is_trivially_move_constructible
+ template<typename _Tp>
+ struct is_trivially_move_constructible
+ : public __is_trivially_move_constructible_impl<_Tp>
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
+
/// is_trivially_assignable
template<typename _Tp, typename _Up>
struct is_trivially_assignable
- : public __and_<is_assignable<_Tp, _Up>,
- integral_constant<bool,
- __is_trivially_assignable(_Tp, _Up)>>::type
+ : public __bool_constant<__is_trivially_assignable(_Tp, _Up)>
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
+
+ template<typename _Tp, bool = __is_referenceable<_Tp>::value>
+ struct __is_trivially_copy_assignable_impl;
+
+ template<typename _Tp>
+ struct __is_trivially_copy_assignable_impl<_Tp, false>
+ : public false_type { };
+
+ template<typename _Tp>
+ struct __is_trivially_copy_assignable_impl<_Tp, true>
+ : public __bool_constant<__is_trivially_assignable(_Tp&, const _Tp&)>
{ };
/// is_trivially_copy_assignable
template<typename _Tp>
struct is_trivially_copy_assignable
- : public __and_<is_copy_assignable<_Tp>,
- integral_constant<bool,
- __is_trivially_assignable(_Tp&, const _Tp&)>>::type
- { };
+ : public __is_trivially_copy_assignable_impl<_Tp>
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
- /// is_trivially_move_assignable
- template<typename _Tp>
- struct is_trivially_move_assignable
- : public __and_<is_move_assignable<_Tp>,
- integral_constant<bool,
- __is_trivially_assignable(_Tp&, _Tp&&)>>::type
- { };
+ template<typename _Tp, bool = __is_referenceable<_Tp>::value>
+ struct __is_trivially_move_assignable_impl;
- /// is_trivially_destructible
template<typename _Tp>
- struct is_trivially_destructible
- : public __and_<is_destructible<_Tp>, integral_constant<bool,
- __has_trivial_destructor(_Tp)>>::type
- { };
+ struct __is_trivially_move_assignable_impl<_Tp, false>
+ : public false_type { };
- /// has_trivial_default_constructor (temporary legacy)
template<typename _Tp>
- struct has_trivial_default_constructor
- : public integral_constant<bool, __has_trivial_constructor(_Tp)>
+ struct __is_trivially_move_assignable_impl<_Tp, true>
+ : public __bool_constant<__is_trivially_assignable(_Tp&, _Tp&&)>
{ };
- /// has_trivial_copy_constructor (temporary legacy)
+ /// is_trivially_move_assignable
template<typename _Tp>
- struct has_trivial_copy_constructor
- : public integral_constant<bool, __has_trivial_copy(_Tp)>
- { };
+ struct is_trivially_move_assignable
+ : public __is_trivially_move_assignable_impl<_Tp>
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
- /// has_trivial_copy_assign (temporary legacy)
+ /// is_trivially_destructible
template<typename _Tp>
- struct has_trivial_copy_assign
- : public integral_constant<bool, __has_trivial_assign(_Tp)>
- { };
+ struct is_trivially_destructible
+ : public __and_<__is_destructible_safe<_Tp>,
+ __bool_constant<__has_trivial_destructor(_Tp)>>
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
+
/// has_virtual_destructor
template<typename _Tp>
struct has_virtual_destructor
: public integral_constant<bool, __has_virtual_destructor(_Tp)>
- { };
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
+
-
// type property queries.
/// alignment_of
template<typename _Tp>
struct alignment_of
- : public integral_constant<std::size_t, __alignof__(_Tp)> { };
-
+ : public integral_constant<std::size_t, alignof(_Tp)>
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
+
/// 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, unsigned _Uint>
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,
bool = __or_<is_void<_From>, is_function<_To>,
is_array<_To>>::value>
struct __is_convertible_helper
- { typedef typename is_void<_To>::type type; };
+ {
+ typedef typename is_void<_To>::type type;
+ };
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wctor-dtor-privacy"
template<typename _From, typename _To>
class __is_convertible_helper<_From, _To, false>
{
- template<typename _To1>
- static void __test_aux(_To1);
+ template<typename _To1>
+ static void __test_aux(_To1) noexcept;
template<typename _From1, typename _To1,
typename = decltype(__test_aux<_To1>(std::declval<_From1>()))>
public:
typedef decltype(__test<_From, _To>(0)) type;
};
-
+#pragma GCC diagnostic pop
/// is_convertible
template<typename _From, typename _To>
: public __is_convertible_helper<_From, _To>::type
{ };
+ template<typename _From, typename _To,
+ bool = __or_<is_void<_From>, is_function<_To>,
+ is_array<_To>>::value>
+ struct __is_nt_convertible_helper
+ : is_void<_To>
+ { };
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wctor-dtor-privacy"
+ template<typename _From, typename _To>
+ class __is_nt_convertible_helper<_From, _To, false>
+ {
+ template<typename _To1>
+ static void __test_aux(_To1) noexcept;
+
+ template<typename _From1, typename _To1>
+ static
+ __bool_constant<noexcept(__test_aux<_To1>(std::declval<_From1>()))>
+ __test(int);
+
+ template<typename, typename>
+ static false_type
+ __test(...);
+
+ public:
+ using type = decltype(__test<_From, _To>(0));
+ };
+#pragma GCC diagnostic pop
+
+ // is_nothrow_convertible for C++11
+ template<typename _From, typename _To>
+ struct __is_nothrow_convertible
+ : public __is_nt_convertible_helper<_From, _To>::type
+ { };
+
+#if __cplusplus > 201703L
+ /// is_nothrow_convertible
+ template<typename _From, typename _To>
+ struct is_nothrow_convertible
+ : public __is_nt_convertible_helper<_From, _To>::type
+ { };
+
+ /// is_nothrow_convertible_v
+ template<typename _From, typename _To>
+ inline constexpr bool is_nothrow_convertible_v
+ = is_nothrow_convertible<_From, _To>::value;
+#endif // C++2a
// Const-volatile modifications.
template<typename _Tp>
struct remove_const<_Tp const>
{ typedef _Tp type; };
-
+
/// remove_volatile
template<typename _Tp>
struct remove_volatile
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 __cv_selector<_Unqualified, _IsConst, _IsVol> __match;
public:
- typedef typename __match::__type __type;
+ typedef typename __match::__type __type;
};
// Utility for finding the unsigned versions of signed integral types.
struct __make_unsigned<long long>
{ typedef unsigned long long __type; };
-#if defined(_GLIBCXX_USE_WCHAR_T) && !defined(__WCHAR_UNSIGNED__)
- template<>
- struct __make_unsigned<wchar_t> : __make_unsigned<__WCHAR_TYPE__>
- { };
-#endif
-
#if defined(__GLIBCXX_TYPE_INT_N_0)
template<>
struct __make_unsigned<__GLIBCXX_TYPE_INT_N_0>
#endif
// Select between integral and enum: not possible to be both.
- template<typename _Tp,
+ template<typename _Tp,
bool _IsInt = is_integral<_Tp>::value,
bool _IsEnum = is_enum<_Tp>::value>
class __make_unsigned_selector;
template<typename _Tp>
class __make_unsigned_selector<_Tp, true, false>
{
- typedef __make_unsigned<typename remove_cv<_Tp>::type> __unsignedt;
- typedef typename __unsignedt::__type __unsigned_type;
- typedef __match_cv_qualifiers<_Tp, __unsigned_type> __cv_unsigned;
+ using __unsigned_type
+ = typename __make_unsigned<typename remove_cv<_Tp>::type>::__type;
public:
- typedef typename __cv_unsigned::__type __type;
+ using __type
+ = typename __match_cv_qualifiers<_Tp, __unsigned_type>::__type;
};
+ class __make_unsigned_selector_base
+ {
+ protected:
+ template<typename...> struct _List { };
+
+ template<typename _Tp, typename... _Up>
+ struct _List<_Tp, _Up...> : _List<_Up...>
+ { static constexpr size_t __size = sizeof(_Tp); };
+
+ template<size_t _Sz, typename _Tp, bool = (_Sz <= _Tp::__size)>
+ struct __select;
+
+ template<size_t _Sz, typename _Uint, typename... _UInts>
+ struct __select<_Sz, _List<_Uint, _UInts...>, true>
+ { using __type = _Uint; };
+
+ template<size_t _Sz, typename _Uint, typename... _UInts>
+ struct __select<_Sz, _List<_Uint, _UInts...>, false>
+ : __select<_Sz, _List<_UInts...>>
+ { };
+ };
+
+ // Choose unsigned integer type with the smallest rank and same size as _Tp
template<typename _Tp>
class __make_unsigned_selector<_Tp, false, true>
+ : __make_unsigned_selector_base
{
// With -fshort-enums, an enum may be as small as a char.
- typedef unsigned char __smallest;
- static const bool __b0 = sizeof(_Tp) <= sizeof(__smallest);
- static const bool __b1 = sizeof(_Tp) <= sizeof(unsigned short);
- static const bool __b2 = sizeof(_Tp) <= sizeof(unsigned int);
- typedef conditional<__b2, unsigned int, unsigned long> __cond2;
- typedef typename __cond2::type __cond2_type;
- typedef conditional<__b1, unsigned short, __cond2_type> __cond1;
- typedef typename __cond1::type __cond1_type;
+ using _UInts = _List<unsigned char, unsigned short, unsigned int,
+ unsigned long, unsigned long long>;
+
+ using __unsigned_type = typename __select<sizeof(_Tp), _UInts>::__type;
public:
- typedef typename conditional<__b0, __smallest, __cond1_type>::type __type;
+ using __type
+ = typename __match_cv_qualifiers<_Tp, __unsigned_type>::__type;
+ };
+
+ // wchar_t, char8_t, char16_t and char32_t are integral types but are
+ // neither signed integer types nor unsigned integer types, so must be
+ // transformed to the unsigned integer type with the smallest rank.
+ // Use the partial specialization for enumeration types to do that.
+#if defined(_GLIBCXX_USE_WCHAR_T)
+ template<>
+ struct __make_unsigned<wchar_t>
+ {
+ using __type
+ = typename __make_unsigned_selector<wchar_t, false, true>::__type;
+ };
+#endif
+
+#ifdef _GLIBCXX_USE_CHAR8_T
+ template<>
+ struct __make_unsigned<char8_t>
+ {
+ using __type
+ = typename __make_unsigned_selector<char8_t, false, true>::__type;
+ };
+#endif
+
+ template<>
+ struct __make_unsigned<char16_t>
+ {
+ using __type
+ = typename __make_unsigned_selector<char16_t, false, true>::__type;
+ };
+
+ template<>
+ struct __make_unsigned<char32_t>
+ {
+ using __type
+ = typename __make_unsigned_selector<char32_t, false, true>::__type;
};
// Given an integral/enum type, return the corresponding unsigned
// Primary template.
/// make_unsigned
template<typename _Tp>
- struct make_unsigned
+ struct make_unsigned
{ typedef typename __make_unsigned_selector<_Tp>::__type type; };
// Integral, but don't define.
struct __make_signed<unsigned long long>
{ typedef signed long long __type; };
-#if defined(_GLIBCXX_USE_WCHAR_T) && defined(__WCHAR_UNSIGNED__)
- template<>
- struct __make_signed<wchar_t> : __make_signed<__WCHAR_TYPE__>
- { };
-#endif
-
-#ifdef _GLIBCXX_USE_C99_STDINT_TR1
- template<>
- struct __make_signed<char16_t> : __make_signed<uint_least16_t>
- { };
- template<>
- struct __make_signed<char32_t> : __make_signed<uint_least32_t>
- { };
-#endif
-
#if defined(__GLIBCXX_TYPE_INT_N_0)
template<>
struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_0>
#endif
// Select between integral and enum: not possible to be both.
- template<typename _Tp,
+ template<typename _Tp,
bool _IsInt = is_integral<_Tp>::value,
bool _IsEnum = is_enum<_Tp>::value>
class __make_signed_selector;
template<typename _Tp>
class __make_signed_selector<_Tp, true, false>
{
- typedef __make_signed<typename remove_cv<_Tp>::type> __signedt;
- typedef typename __signedt::__type __signed_type;
- typedef __match_cv_qualifiers<_Tp, __signed_type> __cv_signed;
+ using __signed_type
+ = typename __make_signed<typename remove_cv<_Tp>::type>::__type;
public:
- typedef typename __cv_signed::__type __type;
+ using __type
+ = typename __match_cv_qualifiers<_Tp, __signed_type>::__type;
};
+ // Choose signed integer type with the smallest rank and same size as _Tp
template<typename _Tp>
class __make_signed_selector<_Tp, false, true>
{
- // With -fshort-enums, an enum may be as small as a char.
- typedef signed char __smallest;
- static const bool __b0 = sizeof(_Tp) <= sizeof(__smallest);
- static const bool __b1 = sizeof(_Tp) <= sizeof(signed short);
- static const bool __b2 = sizeof(_Tp) <= sizeof(signed int);
- typedef conditional<__b2, signed int, signed long> __cond2;
- typedef typename __cond2::type __cond2_type;
- typedef conditional<__b1, signed short, __cond2_type> __cond1;
- typedef typename __cond1::type __cond1_type;
+ typedef typename __make_unsigned_selector<_Tp>::__type __unsigned_type;
public:
- typedef typename conditional<__b0, __smallest, __cond1_type>::type __type;
+ typedef typename __make_signed_selector<__unsigned_type>::__type __type;
+ };
+
+ // wchar_t, char16_t and char32_t are integral types but are neither
+ // signed integer types nor unsigned integer types, so must be
+ // transformed to the signed integer type with the smallest rank.
+ // Use the partial specialization for enumeration types to do that.
+#if defined(_GLIBCXX_USE_WCHAR_T)
+ template<>
+ struct __make_signed<wchar_t>
+ {
+ using __type
+ = typename __make_signed_selector<wchar_t, false, true>::__type;
+ };
+#endif
+
+#if defined(_GLIBCXX_USE_CHAR8_T)
+ template<>
+ struct __make_signed<char8_t>
+ {
+ using __type
+ = typename __make_signed_selector<char8_t, false, true>::__type;
+ };
+#endif
+
+ template<>
+ struct __make_signed<char16_t>
+ {
+ using __type
+ = typename __make_signed_selector<char16_t, false, true>::__type;
+ };
+
+ template<>
+ struct __make_signed<char32_t>
+ {
+ using __type
+ = typename __make_signed_selector<char32_t, false, true>::__type;
};
// Given an integral/enum type, return the corresponding signed
// Primary template.
/// make_signed
template<typename _Tp>
- struct make_signed
+ struct make_signed
{ typedef typename __make_signed_selector<_Tp>::__type type; };
// Integral, but don't define.
{ typedef typename remove_reference<_Tp>::type* type; };
template<typename _Tp>
- struct add_pointer
+ struct add_pointer
: public __add_pointer_helper<_Tp>
{ };
template<std::size_t _Len>
struct __aligned_storage_msa
- {
+ {
union __type
{
unsigned char __data[_Len];
- struct __attribute__((__aligned__)) { } __align;
+ struct __attribute__((__aligned__)) { } __align;
};
};
template<std::size_t _Len, std::size_t _Align =
__alignof__(typename __aligned_storage_msa<_Len>::__type)>
struct aligned_storage
- {
+ {
union type
{
unsigned char __data[_Len];
- struct __attribute__((__aligned__((_Align)))) { } __align;
+ struct __attribute__((__aligned__((_Align)))) { } __align;
};
};
// Decay trait for arrays and functions, used for perfect forwarding
// in make_pair, make_tuple, etc.
- template<typename _Up,
+ template<typename _Up,
bool _IsArray = is_array<_Up>::value,
- bool _IsFunction = is_function<_Up>::value>
+ bool _IsFunction = is_function<_Up>::value>
struct __decay_selector;
// NB: DR 705.
- template<typename _Up>
+ template<typename _Up>
struct __decay_selector<_Up, false, false>
{ typedef typename remove_cv<_Up>::type __type; };
- template<typename _Up>
+ template<typename _Up>
struct __decay_selector<_Up, true, false>
{ typedef typename remove_extent<_Up>::type* __type; };
- template<typename _Up>
+ template<typename _Up>
struct __decay_selector<_Up, false, true>
{ typedef typename add_pointer<_Up>::type __type; };
/// decay
- template<typename _Tp>
- class decay
- {
+ template<typename _Tp>
+ class decay
+ {
typedef typename remove_reference<_Tp>::type __remove_type;
public:
// Primary template.
/// Define a member typedef @c type only if a boolean constant is true.
template<bool, typename _Tp = void>
- struct enable_if
+ struct enable_if
{ };
// Partial specialization for true.
struct conditional<false, _Iftrue, _Iffalse>
{ typedef _Iffalse type; };
+ // __void_t (std::void_t for C++11)
+ template<typename...> using __void_t = void;
+
/// common_type
template<typename... _Tp>
struct common_type;
struct __do_common_type_impl
{
template<typename _Tp, typename _Up>
- static __success_type<typename decay<decltype
- (true ? std::declval<_Tp>()
- : std::declval<_Up>())>::type> _S_test(int);
+ using __cond_t
+ = decltype(true ? std::declval<_Tp>() : std::declval<_Up>());
+
+ template<typename _Tp, typename _Up>
+ static __success_type<typename decay<__cond_t<_Tp, _Up>>::type>
+ _S_test(int);
template<typename, typename>
- static __failure_type _S_test(...);
+ static __failure_type
+ _S_test(...);
};
- template<typename _Tp, typename _Up>
- struct __common_type_impl
- : private __do_common_type_impl
- {
- typedef decltype(_S_test<_Tp, _Up>(0)) type;
- };
-
- struct __do_member_type_wrapper
- {
- template<typename _Tp>
- static __success_type<typename _Tp::type> _S_test(int);
+ // If sizeof...(T) is zero, there shall be no member type.
+ template<>
+ struct common_type<>
+ { };
- template<typename>
- static __failure_type _S_test(...);
- };
+ // If sizeof...(T) is one, the same type, if any, as common_type_t<T0, T0>.
+ template<typename _Tp0>
+ struct common_type<_Tp0>
+ : public common_type<_Tp0, _Tp0>
+ { };
- template<typename _Tp>
- struct __member_type_wrapper
- : private __do_member_type_wrapper
+ // If sizeof...(T) is two, ...
+ template<typename _Tp1, typename _Tp2,
+ typename _Dp1 = typename decay<_Tp1>::type,
+ typename _Dp2 = typename decay<_Tp2>::type>
+ struct __common_type_impl
{
- typedef decltype(_S_test<_Tp>(0)) type;
+ // If is_same_v<T1, D1> is false or is_same_v<T2, D2> is false,
+ // let C denote the same type, if any, as common_type_t<D1, D2>.
+ using type = common_type<_Dp1, _Dp2>;
};
- template<typename _CTp, typename... _Args>
- struct __expanded_common_type_wrapper
+ template<typename _Tp1, typename _Tp2>
+ struct __common_type_impl<_Tp1, _Tp2, _Tp1, _Tp2>
+ : private __do_common_type_impl
{
- typedef common_type<typename _CTp::type, _Args...> type;
+ // Otherwise, if decay_t<decltype(false ? declval<D1>() : declval<D2>())>
+ // denotes a valid type, let C denote that type.
+ using type = decltype(_S_test<_Tp1, _Tp2>(0));
};
- template<typename... _Args>
- struct __expanded_common_type_wrapper<__failure_type, _Args...>
- { typedef __failure_type type; };
+ // If sizeof...(T) is two, ...
+ template<typename _Tp1, typename _Tp2>
+ struct common_type<_Tp1, _Tp2>
+ : public __common_type_impl<_Tp1, _Tp2>::type
+ { };
+
+ template<typename...>
+ struct __common_type_pack
+ { };
- template<typename _Tp>
- struct common_type<_Tp>
- { typedef typename decay<_Tp>::type type; };
+ template<typename, typename, typename = void>
+ struct __common_type_fold;
- template<typename _Tp, typename _Up>
- struct common_type<_Tp, _Up>
- : public __common_type_impl<_Tp, _Up>::type
+ // If sizeof...(T) is greater than two, ...
+ template<typename _Tp1, typename _Tp2, typename... _Rp>
+ struct common_type<_Tp1, _Tp2, _Rp...>
+ : public __common_type_fold<common_type<_Tp1, _Tp2>,
+ __common_type_pack<_Rp...>>
+ { };
+
+ // Let C denote the same type, if any, as common_type_t<T1, T2>.
+ // If there is such a type C, type shall denote the same type, if any,
+ // as common_type_t<C, R...>.
+ template<typename _CTp, typename... _Rp>
+ struct __common_type_fold<_CTp, __common_type_pack<_Rp...>,
+ __void_t<typename _CTp::type>>
+ : public common_type<typename _CTp::type, _Rp...>
{ };
- template<typename _Tp, typename _Up, typename... _Vp>
- struct common_type<_Tp, _Up, _Vp...>
- : public __expanded_common_type_wrapper<typename __member_type_wrapper<
- common_type<_Tp, _Up>>::type, _Vp...>::type
+ // Otherwise, there shall be no member type.
+ template<typename _CTp, typename _Rp>
+ struct __common_type_fold<_CTp, _Rp, void>
+ { };
+
+ template<typename _Tp, bool = is_enum<_Tp>::value>
+ struct __underlying_type_impl
+ {
+ using type = __underlying_type(_Tp);
+ };
+
+ template<typename _Tp>
+ struct __underlying_type_impl<_Tp, false>
{ };
/// The underlying type of an enum.
template<typename _Tp>
struct underlying_type
- {
- typedef __underlying_type(_Tp) type;
- };
+ : public __underlying_type_impl<_Tp>
+ { };
template<typename _Tp>
struct __declval_protector
{
static const bool __stop = false;
- static typename add_rvalue_reference<_Tp>::type __delegate();
};
template<typename _Tp>
- inline typename add_rvalue_reference<_Tp>::type
- declval() noexcept
+ auto declval() noexcept -> decltype(__declval<_Tp>(0))
{
static_assert(__declval_protector<_Tp>::__stop,
"declval() must not be used!");
- return __declval_protector<_Tp>::__delegate();
+ return __declval<_Tp>(0);
}
+ // __remove_cvref_t (std::remove_cvref_t for C++11).
+ template<typename _Tp>
+ using __remove_cvref_t
+ = typename remove_cv<typename remove_reference<_Tp>::type>::type;
+
/// result_of
template<typename _Signature>
class result_of;
#define __cpp_lib_result_of_sfinae 201210
+ struct __invoke_memfun_ref { };
+ struct __invoke_memfun_deref { };
+ struct __invoke_memobj_ref { };
+ struct __invoke_memobj_deref { };
+ struct __invoke_other { };
+
+ // Associate a tag type with a specialization of __success_type.
+ template<typename _Tp, typename _Tag>
+ struct __result_of_success : __success_type<_Tp>
+ { using __invoke_type = _Tag; };
+
// [func.require] paragraph 1 bullet 1:
struct __result_of_memfun_ref_impl
{
template<typename _Fp, typename _Tp1, typename... _Args>
- static __success_type<decltype(
+ static __result_of_success<decltype(
(std::declval<_Tp1>().*std::declval<_Fp>())(std::declval<_Args>()...)
- )> _S_test(int);
+ ), __invoke_memfun_ref> _S_test(int);
template<typename...>
static __failure_type _S_test(...);
struct __result_of_memfun_deref_impl
{
template<typename _Fp, typename _Tp1, typename... _Args>
- static __success_type<decltype(
+ static __result_of_success<decltype(
((*std::declval<_Tp1>()).*std::declval<_Fp>())(std::declval<_Args>()...)
- )> _S_test(int);
+ ), __invoke_memfun_deref> _S_test(int);
template<typename...>
static __failure_type _S_test(...);
struct __result_of_memobj_ref_impl
{
template<typename _Fp, typename _Tp1>
- static __success_type<decltype(
+ static __result_of_success<decltype(
std::declval<_Tp1>().*std::declval<_Fp>()
- )> _S_test(int);
+ ), __invoke_memobj_ref> _S_test(int);
template<typename, typename>
static __failure_type _S_test(...);
struct __result_of_memobj_deref_impl
{
template<typename _Fp, typename _Tp1>
- static __success_type<decltype(
+ static __result_of_success<decltype(
(*std::declval<_Tp1>()).*std::declval<_Fp>()
- )> _S_test(int);
+ ), __invoke_memobj_deref> _S_test(int);
template<typename, typename>
static __failure_type _S_test(...);
template<typename _Res, typename _Class, typename _Arg>
struct __result_of_memobj<_Res _Class::*, _Arg>
{
- typedef typename remove_cv<typename remove_reference<
- _Arg>::type>::type _Argval;
+ typedef __remove_cvref_t<_Arg> _Argval;
typedef _Res _Class::* _MemPtr;
typedef typename conditional<__or_<is_same<_Argval, _Class>,
is_base_of<_Class, _Argval>>::value,
template<typename _Res, typename _Class, typename _Arg, typename... _Args>
struct __result_of_memfun<_Res _Class::*, _Arg, _Args...>
{
- typedef typename remove_cv<typename remove_reference<
- _Arg>::type>::type _Argval;
+ typedef typename remove_reference<_Arg>::type _Argval;
typedef _Res _Class::* _MemPtr;
- typedef typename conditional<__or_<is_same<_Argval, _Class>,
- is_base_of<_Class, _Argval>>::value,
+ typedef typename conditional<is_base_of<_Class, _Argval>::value,
__result_of_memfun_ref<_MemPtr, _Arg, _Args...>,
__result_of_memfun_deref<_MemPtr, _Arg, _Args...>
>::type::type type;
};
+ // _GLIBCXX_RESOLVE_LIB_DEFECTS
+ // 2219. INVOKE-ing a pointer to member with a reference_wrapper
+ // as the object expression
+
+ // Used by result_of, invoke etc. to unwrap a reference_wrapper.
+ template<typename _Tp, typename _Up = __remove_cvref_t<_Tp>>
+ struct __inv_unwrap
+ {
+ using type = _Tp;
+ };
+
+ template<typename _Tp, typename _Up>
+ struct __inv_unwrap<_Tp, reference_wrapper<_Up>>
+ {
+ using type = _Up&;
+ };
+
template<bool, bool, typename _Functor, typename... _ArgTypes>
struct __result_of_impl
{
template<typename _MemPtr, typename _Arg>
struct __result_of_impl<true, false, _MemPtr, _Arg>
- : public __result_of_memobj<typename decay<_MemPtr>::type, _Arg>
+ : public __result_of_memobj<typename decay<_MemPtr>::type,
+ typename __inv_unwrap<_Arg>::type>
{ };
template<typename _MemPtr, typename _Arg, typename... _Args>
struct __result_of_impl<false, true, _MemPtr, _Arg, _Args...>
- : public __result_of_memfun<typename decay<_MemPtr>::type, _Arg, _Args...>
+ : public __result_of_memfun<typename decay<_MemPtr>::type,
+ typename __inv_unwrap<_Arg>::type, _Args...>
{ };
// [func.require] paragraph 1 bullet 5:
struct __result_of_other_impl
{
template<typename _Fn, typename... _Args>
- static __success_type<decltype(
+ static __result_of_success<decltype(
std::declval<_Fn>()(std::declval<_Args>()...)
- )> _S_test(int);
+ ), __invoke_other> _S_test(int);
template<typename...>
static __failure_type _S_test(...);
typedef decltype(_S_test<_Functor, _ArgTypes...>(0)) type;
};
+ // __invoke_result (std::invoke_result for C++11)
template<typename _Functor, typename... _ArgTypes>
- struct result_of<_Functor(_ArgTypes...)>
+ struct __invoke_result
: public __result_of_impl<
is_member_object_pointer<
typename remove_reference<_Functor>::type
is_member_function_pointer<
typename remove_reference<_Functor>::type
>::value,
- _Functor, _ArgTypes...
+ _Functor, _ArgTypes...
>::type
{ };
-#if __cplusplus > 201103L
+ template<typename _Functor, typename... _ArgTypes>
+ struct result_of<_Functor(_ArgTypes...)>
+ : public __invoke_result<_Functor, _ArgTypes...>
+ { };
+
+#if __cplusplus >= 201402L
/// Alias template for aligned_storage
template<size_t _Len, size_t _Align =
__alignof__(typename __aligned_storage_msa<_Len>::__type)>
/// Alias template for result_of
template<typename _Tp>
using result_of_t = typename result_of<_Tp>::type;
+#endif // C++14
+
+ // __enable_if_t (std::enable_if_t for C++11)
+ template<bool _Cond, typename _Tp = void>
+ using __enable_if_t = typename enable_if<_Cond, _Tp>::type;
+
+#if __cplusplus >= 201703L || !defined(__STRICT_ANSI__) // c++17 or gnu++11
+#define __cpp_lib_void_t 201411
+ /// A metafunction that always yields void, used for detecting valid types.
+ template<typename...> using void_t = void;
#endif
- template<typename...> using __void_t = void;
+ /// Implementation of the detection idiom (negative case).
+ template<typename _Default, typename _AlwaysVoid,
+ template<typename...> class _Op, typename... _Args>
+ struct __detector
+ {
+ using value_t = false_type;
+ using type = _Default;
+ };
+
+ /// Implementation of the detection idiom (positive case).
+ template<typename _Default, template<typename...> class _Op,
+ typename... _Args>
+ struct __detector<_Default, __void_t<_Op<_Args...>>, _Op, _Args...>
+ {
+ using value_t = true_type;
+ using type = _Op<_Args...>;
+ };
+
+ // Detect whether _Op<_Args...> is a valid type, use _Default if not.
+ template<typename _Default, template<typename...> class _Op,
+ typename... _Args>
+ using __detected_or = __detector<_Default, void, _Op, _Args...>;
+
+ // _Op<_Args...> if that is a valid type, otherwise _Default.
+ template<typename _Default, template<typename...> class _Op,
+ typename... _Args>
+ using __detected_or_t
+ = typename __detected_or<_Default, _Op, _Args...>::type;
/// @} group metaprogramming
: true_type \
{ };
+ template <typename _Tp>
+ struct __is_swappable;
+
+ template <typename _Tp>
+ struct __is_nothrow_swappable;
+
+ template<typename... _Elements>
+ class tuple;
+
+ template<typename>
+ struct __is_tuple_like_impl : false_type
+ { };
+
+ template<typename... _Tps>
+ struct __is_tuple_like_impl<tuple<_Tps...>> : true_type
+ { };
+
+ // Internal type trait that allows us to sfinae-protect tuple_cat.
+ template<typename _Tp>
+ struct __is_tuple_like
+ : public __is_tuple_like_impl<__remove_cvref_t<_Tp>>::type
+ { };
+
+ template<typename _Tp>
+ inline
+ typename enable_if<__and_<__not_<__is_tuple_like<_Tp>>,
+ is_move_constructible<_Tp>,
+ is_move_assignable<_Tp>>::value>::type
+ swap(_Tp&, _Tp&)
+ noexcept(__and_<is_nothrow_move_constructible<_Tp>,
+ is_nothrow_move_assignable<_Tp>>::value);
+
+ template<typename _Tp, size_t _Nm>
+ inline
+ typename enable_if<__is_swappable<_Tp>::value>::type
+ swap(_Tp (&__a)[_Nm], _Tp (&__b)[_Nm])
+ noexcept(__is_nothrow_swappable<_Tp>::value);
+
+ namespace __swappable_details {
+ using std::swap;
+
+ struct __do_is_swappable_impl
+ {
+ template<typename _Tp, typename
+ = decltype(swap(std::declval<_Tp&>(), std::declval<_Tp&>()))>
+ static true_type __test(int);
+
+ template<typename>
+ static false_type __test(...);
+ };
+
+ struct __do_is_nothrow_swappable_impl
+ {
+ template<typename _Tp>
+ static __bool_constant<
+ noexcept(swap(std::declval<_Tp&>(), std::declval<_Tp&>()))
+ > __test(int);
+
+ template<typename>
+ static false_type __test(...);
+ };
+
+ } // namespace __swappable_details
+
+ template<typename _Tp>
+ struct __is_swappable_impl
+ : public __swappable_details::__do_is_swappable_impl
+ {
+ typedef decltype(__test<_Tp>(0)) type;
+ };
+
+ template<typename _Tp>
+ struct __is_nothrow_swappable_impl
+ : public __swappable_details::__do_is_nothrow_swappable_impl
+ {
+ typedef decltype(__test<_Tp>(0)) type;
+ };
+
+ template<typename _Tp>
+ struct __is_swappable
+ : public __is_swappable_impl<_Tp>::type
+ { };
+
+ template<typename _Tp>
+ struct __is_nothrow_swappable
+ : public __is_nothrow_swappable_impl<_Tp>::type
+ { };
+
+#if __cplusplus > 201402L || !defined(__STRICT_ANSI__) // c++1z or gnu++11
+#define __cpp_lib_is_swappable 201603
+ /// Metafunctions used for detecting swappable types: p0185r1
+
+ /// is_swappable
+ template<typename _Tp>
+ struct is_swappable
+ : public __is_swappable_impl<_Tp>::type
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
+
+ /// is_nothrow_swappable
+ template<typename _Tp>
+ struct is_nothrow_swappable
+ : public __is_nothrow_swappable_impl<_Tp>::type
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
+
+#if __cplusplus >= 201402L
+ /// is_swappable_v
+ template<typename _Tp>
+ _GLIBCXX17_INLINE constexpr bool is_swappable_v =
+ is_swappable<_Tp>::value;
+
+ /// is_nothrow_swappable_v
+ template<typename _Tp>
+ _GLIBCXX17_INLINE constexpr bool is_nothrow_swappable_v =
+ is_nothrow_swappable<_Tp>::value;
+#endif // __cplusplus >= 201402L
+
+ namespace __swappable_with_details {
+ using std::swap;
+
+ struct __do_is_swappable_with_impl
+ {
+ template<typename _Tp, typename _Up, typename
+ = decltype(swap(std::declval<_Tp>(), std::declval<_Up>())),
+ typename
+ = decltype(swap(std::declval<_Up>(), std::declval<_Tp>()))>
+ static true_type __test(int);
+
+ template<typename, typename>
+ static false_type __test(...);
+ };
+
+ struct __do_is_nothrow_swappable_with_impl
+ {
+ template<typename _Tp, typename _Up>
+ static __bool_constant<
+ noexcept(swap(std::declval<_Tp>(), std::declval<_Up>()))
+ &&
+ noexcept(swap(std::declval<_Up>(), std::declval<_Tp>()))
+ > __test(int);
+
+ template<typename, typename>
+ static false_type __test(...);
+ };
+
+ } // namespace __swappable_with_details
+
+ template<typename _Tp, typename _Up>
+ struct __is_swappable_with_impl
+ : public __swappable_with_details::__do_is_swappable_with_impl
+ {
+ typedef decltype(__test<_Tp, _Up>(0)) type;
+ };
+
+ // Optimization for the homogenous lvalue case, not required:
+ template<typename _Tp>
+ struct __is_swappable_with_impl<_Tp&, _Tp&>
+ : public __swappable_details::__do_is_swappable_impl
+ {
+ typedef decltype(__test<_Tp&>(0)) type;
+ };
+
+ template<typename _Tp, typename _Up>
+ struct __is_nothrow_swappable_with_impl
+ : public __swappable_with_details::__do_is_nothrow_swappable_with_impl
+ {
+ typedef decltype(__test<_Tp, _Up>(0)) type;
+ };
+
+ // Optimization for the homogenous lvalue case, not required:
+ template<typename _Tp>
+ struct __is_nothrow_swappable_with_impl<_Tp&, _Tp&>
+ : public __swappable_details::__do_is_nothrow_swappable_impl
+ {
+ typedef decltype(__test<_Tp&>(0)) type;
+ };
+
+ /// is_swappable_with
+ template<typename _Tp, typename _Up>
+ struct is_swappable_with
+ : public __is_swappable_with_impl<_Tp, _Up>::type
+ { };
+
+ /// is_nothrow_swappable_with
+ template<typename _Tp, typename _Up>
+ struct is_nothrow_swappable_with
+ : public __is_nothrow_swappable_with_impl<_Tp, _Up>::type
+ { };
+
+#if __cplusplus >= 201402L
+ /// is_swappable_with_v
+ template<typename _Tp, typename _Up>
+ _GLIBCXX17_INLINE constexpr bool is_swappable_with_v =
+ is_swappable_with<_Tp, _Up>::value;
+
+ /// is_nothrow_swappable_with_v
+ template<typename _Tp, typename _Up>
+ _GLIBCXX17_INLINE constexpr bool is_nothrow_swappable_with_v =
+ is_nothrow_swappable_with<_Tp, _Up>::value;
+#endif // __cplusplus >= 201402L
+
+#endif// c++1z or gnu++11
+
+ // __is_invocable (std::is_invocable for C++11)
+
+ template<typename _Result, typename _Ret, typename = void>
+ struct __is_invocable_impl : false_type { };
+
+ template<typename _Result, typename _Ret>
+ struct __is_invocable_impl<_Result, _Ret, __void_t<typename _Result::type>>
+ : __or_<is_void<_Ret>, is_convertible<typename _Result::type, _Ret>>::type
+ { };
+
+ template<typename _Fn, typename... _ArgTypes>
+ struct __is_invocable
+ : __is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, void>::type
+ { };
+
+ template<typename _Fn, typename _Tp, typename... _Args>
+ constexpr bool __call_is_nt(__invoke_memfun_ref)
+ {
+ using _Up = typename __inv_unwrap<_Tp>::type;
+ return noexcept((std::declval<_Up>().*std::declval<_Fn>())(
+ std::declval<_Args>()...));
+ }
+
+ template<typename _Fn, typename _Tp, typename... _Args>
+ constexpr bool __call_is_nt(__invoke_memfun_deref)
+ {
+ return noexcept(((*std::declval<_Tp>()).*std::declval<_Fn>())(
+ std::declval<_Args>()...));
+ }
+
+ template<typename _Fn, typename _Tp>
+ constexpr bool __call_is_nt(__invoke_memobj_ref)
+ {
+ using _Up = typename __inv_unwrap<_Tp>::type;
+ return noexcept(std::declval<_Up>().*std::declval<_Fn>());
+ }
+
+ template<typename _Fn, typename _Tp>
+ constexpr bool __call_is_nt(__invoke_memobj_deref)
+ {
+ return noexcept((*std::declval<_Tp>()).*std::declval<_Fn>());
+ }
+
+ template<typename _Fn, typename... _Args>
+ constexpr bool __call_is_nt(__invoke_other)
+ {
+ return noexcept(std::declval<_Fn>()(std::declval<_Args>()...));
+ }
+
+ template<typename _Result, typename _Fn, typename... _Args>
+ struct __call_is_nothrow
+ : __bool_constant<
+ std::__call_is_nt<_Fn, _Args...>(typename _Result::__invoke_type{})
+ >
+ { };
+
+ template<typename _Fn, typename... _Args>
+ using __call_is_nothrow_
+ = __call_is_nothrow<__invoke_result<_Fn, _Args...>, _Fn, _Args...>;
+
+ // __is_nothrow_invocable (std::is_nothrow_invocable for C++11)
+ template<typename _Fn, typename... _Args>
+ struct __is_nothrow_invocable
+ : __and_<__is_invocable<_Fn, _Args...>,
+ __call_is_nothrow_<_Fn, _Args...>>::type
+ { };
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wctor-dtor-privacy"
+ struct __nonesuchbase {};
+ struct __nonesuch : private __nonesuchbase {
+ ~__nonesuch() = delete;
+ __nonesuch(__nonesuch const&) = delete;
+ void operator=(__nonesuch const&) = delete;
+ };
+#pragma GCC diagnostic pop
+
+#if __cplusplus >= 201703L
+# define __cpp_lib_is_invocable 201703
+
+ /// std::invoke_result
+ template<typename _Functor, typename... _ArgTypes>
+ struct invoke_result
+ : public __invoke_result<_Functor, _ArgTypes...>
+ { };
+
+ /// std::invoke_result_t
+ template<typename _Fn, typename... _Args>
+ using invoke_result_t = typename invoke_result<_Fn, _Args...>::type;
+
+ /// std::is_invocable
+ template<typename _Fn, typename... _ArgTypes>
+ struct is_invocable
+ : __is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, void>::type
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Fn>{}),
+ "_Fn must be a complete class or an unbounded array");
+ };
+
+ /// std::is_invocable_r
+ template<typename _Ret, typename _Fn, typename... _ArgTypes>
+ struct is_invocable_r
+ : __is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, _Ret>::type
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Fn>{}),
+ "_Fn must be a complete class or an unbounded array");
+ };
+
+ /// std::is_nothrow_invocable
+ template<typename _Fn, typename... _ArgTypes>
+ struct is_nothrow_invocable
+ : __and_<__is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, void>,
+ __call_is_nothrow_<_Fn, _ArgTypes...>>::type
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Fn>{}),
+ "_Fn must be a complete class or an unbounded array");
+ };
+
+ template<typename _Result, typename _Ret, typename = void>
+ struct __is_nt_invocable_impl : false_type { };
+
+ template<typename _Result, typename _Ret>
+ struct __is_nt_invocable_impl<_Result, _Ret,
+ __void_t<typename _Result::type>>
+ : __or_<is_void<_Ret>,
+ __is_nothrow_convertible<typename _Result::type, _Ret>>
+ { };
+
+ /// std::is_nothrow_invocable_r
+ template<typename _Ret, typename _Fn, typename... _ArgTypes>
+ struct is_nothrow_invocable_r
+ : __and_<__is_nt_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, _Ret>,
+ __call_is_nothrow_<_Fn, _ArgTypes...>>::type
+ { };
+
+ /// std::is_invocable_v
+ template<typename _Fn, typename... _Args>
+ inline constexpr bool is_invocable_v = is_invocable<_Fn, _Args...>::value;
+
+ /// std::is_nothrow_invocable_v
+ template<typename _Fn, typename... _Args>
+ inline constexpr bool is_nothrow_invocable_v
+ = is_nothrow_invocable<_Fn, _Args...>::value;
+
+ /// std::is_invocable_r_v
+ template<typename _Ret, typename _Fn, typename... _Args>
+ inline constexpr bool is_invocable_r_v
+ = is_invocable_r<_Ret, _Fn, _Args...>::value;
+
+ /// std::is_nothrow_invocable_r_v
+ template<typename _Ret, typename _Fn, typename... _Args>
+ inline constexpr bool is_nothrow_invocable_r_v
+ = is_nothrow_invocable_r<_Ret, _Fn, _Args...>::value;
+#endif // C++17
+
+#if __cplusplus >= 201703L
+# define __cpp_lib_type_trait_variable_templates 201510L
+template <typename _Tp>
+ inline constexpr bool is_void_v = is_void<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_null_pointer_v = is_null_pointer<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_integral_v = is_integral<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_floating_point_v = is_floating_point<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_array_v = is_array<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_pointer_v = is_pointer<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_lvalue_reference_v =
+ is_lvalue_reference<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_rvalue_reference_v =
+ is_rvalue_reference<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_member_object_pointer_v =
+ is_member_object_pointer<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_member_function_pointer_v =
+ is_member_function_pointer<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_enum_v = is_enum<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_union_v = is_union<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_class_v = is_class<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_function_v = is_function<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_reference_v = is_reference<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_arithmetic_v = is_arithmetic<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_fundamental_v = is_fundamental<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_object_v = is_object<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_scalar_v = is_scalar<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_compound_v = is_compound<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_member_pointer_v = is_member_pointer<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_const_v = is_const<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_volatile_v = is_volatile<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_trivial_v = is_trivial<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_trivially_copyable_v =
+ is_trivially_copyable<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_standard_layout_v = is_standard_layout<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_pod_v = is_pod<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_literal_type_v = is_literal_type<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_empty_v = is_empty<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_polymorphic_v = is_polymorphic<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_abstract_v = is_abstract<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_final_v = is_final<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_signed_v = is_signed<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_unsigned_v = is_unsigned<_Tp>::value;
+template <typename _Tp, typename... _Args>
+ inline constexpr bool is_constructible_v =
+ is_constructible<_Tp, _Args...>::value;
+template <typename _Tp>
+ inline constexpr bool is_default_constructible_v =
+ is_default_constructible<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_copy_constructible_v =
+ is_copy_constructible<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_move_constructible_v =
+ is_move_constructible<_Tp>::value;
+template <typename _Tp, typename _Up>
+ inline constexpr bool is_assignable_v = is_assignable<_Tp, _Up>::value;
+template <typename _Tp>
+ inline constexpr bool is_copy_assignable_v = is_copy_assignable<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_move_assignable_v = is_move_assignable<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_destructible_v = is_destructible<_Tp>::value;
+template <typename _Tp, typename... _Args>
+ inline constexpr bool is_trivially_constructible_v =
+ is_trivially_constructible<_Tp, _Args...>::value;
+template <typename _Tp>
+ inline constexpr bool is_trivially_default_constructible_v =
+ is_trivially_default_constructible<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_trivially_copy_constructible_v =
+ is_trivially_copy_constructible<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_trivially_move_constructible_v =
+ is_trivially_move_constructible<_Tp>::value;
+template <typename _Tp, typename _Up>
+ inline constexpr bool is_trivially_assignable_v =
+ is_trivially_assignable<_Tp, _Up>::value;
+template <typename _Tp>
+ inline constexpr bool is_trivially_copy_assignable_v =
+ is_trivially_copy_assignable<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_trivially_move_assignable_v =
+ is_trivially_move_assignable<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_trivially_destructible_v =
+ is_trivially_destructible<_Tp>::value;
+template <typename _Tp, typename... _Args>
+ inline constexpr bool is_nothrow_constructible_v =
+ is_nothrow_constructible<_Tp, _Args...>::value;
+template <typename _Tp>
+ inline constexpr bool is_nothrow_default_constructible_v =
+ is_nothrow_default_constructible<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_nothrow_copy_constructible_v =
+ is_nothrow_copy_constructible<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_nothrow_move_constructible_v =
+ is_nothrow_move_constructible<_Tp>::value;
+template <typename _Tp, typename _Up>
+ inline constexpr bool is_nothrow_assignable_v =
+ is_nothrow_assignable<_Tp, _Up>::value;
+template <typename _Tp>
+ inline constexpr bool is_nothrow_copy_assignable_v =
+ is_nothrow_copy_assignable<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_nothrow_move_assignable_v =
+ is_nothrow_move_assignable<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool is_nothrow_destructible_v =
+ is_nothrow_destructible<_Tp>::value;
+template <typename _Tp>
+ inline constexpr bool has_virtual_destructor_v =
+ has_virtual_destructor<_Tp>::value;
+template <typename _Tp>
+ inline constexpr size_t alignment_of_v = alignment_of<_Tp>::value;
+template <typename _Tp>
+ inline constexpr size_t rank_v = rank<_Tp>::value;
+template <typename _Tp, unsigned _Idx = 0>
+ inline constexpr size_t extent_v = extent<_Tp, _Idx>::value;
+template <typename _Tp, typename _Up>
+ inline constexpr bool is_same_v = is_same<_Tp, _Up>::value;
+template <typename _Base, typename _Derived>
+ inline constexpr bool is_base_of_v = is_base_of<_Base, _Derived>::value;
+template <typename _From, typename _To>
+ inline constexpr bool is_convertible_v = is_convertible<_From, _To>::value;
+
+#ifdef _GLIBCXX_HAVE_BUILTIN_HAS_UNIQ_OBJ_REP
+# define __cpp_lib_has_unique_object_representations 201606
+ /// has_unique_object_representations
+ template<typename _Tp>
+ struct has_unique_object_representations
+ : bool_constant<__has_unique_object_representations(
+ remove_cv_t<remove_all_extents_t<_Tp>>
+ )>
+ {
+ static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
+ "template argument must be a complete class or an unbounded array");
+ };
+
+ template<typename _Tp>
+ inline constexpr bool has_unique_object_representations_v
+ = has_unique_object_representations<_Tp>::value;
+#endif
+
+#ifdef _GLIBCXX_HAVE_BUILTIN_IS_AGGREGATE
+# define __cpp_lib_is_aggregate 201703
+ /// is_aggregate
+ template<typename _Tp>
+ struct is_aggregate
+ : bool_constant<__is_aggregate(remove_cv_t<_Tp>)>
+ { };
+
+ /// is_aggregate_v
+ template<typename _Tp>
+ inline constexpr bool is_aggregate_v = is_aggregate<_Tp>::value;
+#endif
+#endif // C++17
+
+#if __cplusplus > 201703L
+ /// Byte order
+ enum class endian
+ {
+ little = __ORDER_LITTLE_ENDIAN__,
+ big = __ORDER_BIG_ENDIAN__,
+ native = __BYTE_ORDER__
+ };
+
+ /// Remove references and cv-qualifiers.
+ template<typename _Tp>
+ struct remove_cvref
+ {
+ using type = __remove_cvref_t<_Tp>;
+ };
+
+ template<typename _Tp>
+ using remove_cvref_t = __remove_cvref_t<_Tp>;
+
+ /// Identity metafunction.
+ template<typename _Tp>
+ struct type_identity { using type = _Tp; };
+
+ template<typename _Tp>
+ using type_identity_t = typename type_identity<_Tp>::type;
+
+ /// Unwrap a reference_wrapper
+ template<typename _Tp>
+ struct unwrap_reference { using type = _Tp; };
+
+ template<typename _Tp>
+ struct unwrap_reference<reference_wrapper<_Tp>> { using type = _Tp&; };
+
+ template<typename _Tp>
+ using unwrap_reference_t = typename unwrap_reference<_Tp>::type;
+
+ /// Decay type and if it's a reference_wrapper, unwrap it
+ template<typename _Tp>
+ struct unwrap_ref_decay { using type = unwrap_reference_t<decay_t<_Tp>>; };
+
+ template<typename _Tp>
+ using unwrap_ref_decay_t = typename unwrap_ref_decay<_Tp>::type;
+
+#define __cpp_lib_bounded_array_traits 201902L
+
+ /// True for a type that is an array of known bound.
+ template<typename _Tp>
+ struct is_bounded_array
+ : public __is_array_known_bounds<_Tp>
+ { };
+
+ /// True for a type that is an array of unknown bound.
+ template<typename _Tp>
+ struct is_unbounded_array
+ : public __is_array_unknown_bounds<_Tp>
+ { };
+
+ template<typename _Tp>
+ inline constexpr bool is_bounded_array_v
+ = is_bounded_array<_Tp>::value;
+
+ template<typename _Tp>
+ inline constexpr bool is_unbounded_array_v
+ = is_unbounded_array<_Tp>::value;
+
+#ifdef _GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED
+
+#define __cpp_lib_is_constant_evaluated 201811L
+
+ constexpr inline bool
+ is_constant_evaluated() noexcept
+ { return __builtin_is_constant_evaluated(); }
+#endif
+
+#endif // C++2a
+
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
projects / thirdparty / gcc.git / blobdiff