std::uses_allocator<std::tuple>
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| Заголовочный файл <tuple>
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| template< class... Types, class Alloc > struct uses_allocator< std::tuple<Types...>, Alloc > : std::true_type { }; |
(начиная с C++11) | |
Эта специализация std::uses_allocator сообщает другими компонентами библиотеки, что кортежи поддержку использует-распределитель строительства, даже если они не имеют вложенных
allocator_type.Original:
This specialization of std::uses_allocator informs other library components that tuples support uses-allocator construction, even though they do not have a nested
allocator_type.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Содержание |
Унаследован от std::integral_constant
Member constants
| value [static] |
true (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
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bool
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type
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std::integral_constant<bool, value> |
[править] Пример
// myalloc is a stateful Allocator with a single-argument constructor // that takes an int. It has no default constructor. typedef std::vector<int, myalloc<int>> innervector_t; typedef std::tuple<int, innervector_t> elem_t; typedef std::scoped_allocator_adaptor< myalloc<elem_t>, myalloc<int>> Alloc; Alloc a(1,2); std::vector<elem_t, Alloc> v(a); v.resize(1); // uses allocator #1 for elements of v std::get<1>(v[0]).resize(10); // uses allocator #2 for innervector_t
[править] См. также
| (C++11) |
проверяет, является ли указанный тип поддерживает использование-распределитель строительства Original: checks if the specified type supports uses-allocator construction The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (шаблон класса) |