std::is_destructible, std::is_trivially_destructible, std::is_nothrow_destructible

 

C++

Язык

Понятия (концепции)

Утилиты

Строки

Контейнеры

Алгоритмы

Итераторы

Работа с числами

Ввод / вывод

Локализация

Регулярные выражения (C++11)

Атомарные примитивы (C++11)

Потоки (C++11)

 

Утилиты библиотеки

Поддежка типов (базовые типы, RTTI, type traits)

Динамическое управление памятью

Обработка ошибок

Управление жизненным циклом программы

Функции с переменным числом аргументов

Дата и время

Функциональные объекты

initializer_list (C++11)

bitset

hash (C++11)

Реляционные операторы

rel_ops::operator!= rel_ops::operator> rel_ops::operator<= rel_ops::operator>=

Пары и кортежи

pair

tuple (C++11)

piecewise_construct_t (C++11)

piecewise_construct (C++11)

Обмен, передача и перемещение

swap

forward (C++11)

move (C++11)

move_if_noexcept (C++11)

declval (C++11)

 

Поддержка типов

Основные типы Original: Basic types The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Основные типы
Исправлены типы целых ширину (C++11)
ptrdiff_t size_t max_align_t (C++11)	nullptr_t (C++11) offsetof NULL
Числовые пределы Original: Numeric limits The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
numeric_limits
С числовым ограничивает интерфейс
Время тип информации Original: Runtime type information The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
type_info type_index (C++11)	bad_typeid bad_cast
Тип черты Original: Type traits The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Первичные категории типа Original: Primary type categories The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
is_void (C++11) is_array (C++11) is_pointer (C++11) is_enum (C++11) is_union (C++11) is_class (C++11) is_function (C++11)	is_object (C++11) is_scalar (C++11) is_compound (C++11) is_integral (C++11) is_floating_point (C++11) is_fundamental (C++11) is_arithmetic (C++11)
is_reference (C++11)
is_lvalue_reference (C++11)
is_rvalue_reference (C++11)
is_member_pointer (C++11)
is_member_object_pointer (C++11)
is_member_function_pointer (C++11)

Тип свойства Original: Type properties The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
is_const (C++11) is_volatile (C++11) is_pod (C++11) is_empty (C++11) is_polymorphic (C++11) is_abstract (C++11)	is_trivial (C++11) is_trivially_copyable (C++11) is_standard_layout (C++11) is_literal_type (C++11) is_signed (C++11) is_unsigned (C++11)

Поддерживаемые операции Original: Supported operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
is_constructible is_trivially_constructible is_nothrow_constructible (C++11) (C++11) (C++11)
is_default_constructible is_trivially_default_constructible is_nothrow_default_constructible (C++11) (C++11) (C++11)
is_copy_constructible is_trivially_copy_constructible is_nothrow_copy_constructible (C++11) (C++11) (C++11)
is_move_constructible is_trivially_move_constructible is_nothrow_move_constructible (C++11) (C++11) (C++11)
is_assignable is_trivially_assignable is_nothrow_assignable (C++11) (C++11) (C++11)
is_copy_assignable is_trivially_copy_assignable is_nothrow_copy_assignable (C++11) (C++11) (C++11)
is_move_assignable is_trivially_move_assignable is_nothrow_move_assignable (C++11) (C++11) (C++11)
is_destructible is_trivially_destructible is_nothrow_destructible (C++11) (C++11) (C++11)
has_virtual_destructor (C++11)
Отношения собственности и запросов Original: Relationships and property queries The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
is_same (C++11) is_base_of (C++11) is_convertible (C++11)	alignment_of (C++11) rank (C++11) extent (C++11)
Тип модификаций Original: Type modifications The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
remove_cv remove_const remove_volatile (C++11) (C++11) (C++11) add_cv add_const add_volatile (C++11) (C++11) (C++11) make_signed (C++11) make_unsigned (C++11)	remove_reference (C++11) add_lvalue_reference add_rvalue_reference (C++11) (C++11) remove_pointer (C++11) add_pointer (C++11) remove_extent (C++11) remove_all_extents (C++11)
Тип преобразования Original: Type transformations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
aligned_storage (C++11) aligned_union (C++11) decay (C++11) enable_if (C++11)	conditional (C++11) common_type (C++11) underlying_type (C++11) result_of (C++11)
Введите черта констант Original: Type trait constants The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
integral_constant (C++11)

 

Заголовочный файл <type_traits>
template< class T > struct is_destructible;	(1)	(начиная с C++11)
template< class T > struct is_trivially_destructible;	(2)	(начиная с C++11)
template< class T > struct is_nothrow_destructible;	(3)	(начиная с C++11)

1)

Если мнимая структура, содержащая членом объекта типа T имеет не удалил деструктор, обеспечивает постоянный член value равных true. Для любого другого типа, value является false.

Original:

If an imaginary struct containing a member object of type T has a non-deleted destructor, provides the member constant value equal true. For any other type, value is false.

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2)

же, как и 1), но деструктор не вызывается любой операции, которая не является тривиальной.

Original:

same as 1), but the destructor does not call any operation that is not trivial.

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3)

же, как и 1), но деструктор noexcept.

Original:

same as 1), but the destructor is noexcept.

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Унаследован от std::integral_constant

Member constants

value [static]	true если T is destructible, false иначе Original: true if T is destructible, false otherwise The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (public static константа-член)

Member functions

operator bool	преобразует объект в bool, возвращает value Original: converts the object to bool, returns value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (public функция-член)

Member types

Type Original: Type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.	Definition
value_type	bool
type	std::integral_constant<bool, value>

Notes

Поскольку C + + программа завершается, если деструктор вызывает исключение во время раскручивания стека (которые обычно не могут быть предсказаны), все практические деструкторы не являются метания, даже если они не объявлены noexcept. Все деструкторы найти в C + + библиотеки стандартных номера для метания.

Original:

Because the C++ program terminates if a destructor throws an exception during stack unwinding (which usually cannot be predicted), all practical destructors are non-throwing even if they are not declared noexcept. All destructors found in the C++ standard library are non-throwing.

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Пример

#include <iostream>
#include <string>
#include <type_traits>
struct Foo {
   std::string str;
   ~Foo() noexcept {};
};
struct Bar {
    ~Bar() = default;
};
int main() {
    std::cout << std::boolalpha
              << "std::string is destructible? "
              << std::is_destructible<std::string>::value << '\n'
              << "Foo is nothrow destructible? "
              << std::is_nothrow_destructible<Foo>::value << '\n'
              << "Bar is trivally destructible? "
              << std::is_trivially_destructible<Bar>::value << '\n';
}

Вывод:

std::string is destructible? true
Foo is nothrow destructible? true
Bar is trivally destructible? true

См. также

is_constructible is_trivially_constructible is_nothrow_constructible (C++11) (C++11) (C++11)	проверяет, является ли тип имеет конструктор для конкретных аргументов Original: checks if a type has a constructor for specific arguments The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (шаблон класса)
has_virtual_destructor (C++11)	проверяет, является ли тип имеет виртуальный деструктор Original: checks if a type has a virtual destructor The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (шаблон класса)