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std::uses_allocator<std::tuple>

提供: cppreference.com
< cpp‎ | utility‎ | tuple

 
 
ユーティリティライブラリ
支援を入力します (basic types, RTTI, type traits)
動的なメモリ管理
エラー処理
プログラムユーティリティ
可変個引数関数
日付と時刻
関数オブジェクト
initializer_list(C++11)
bitset
hash(C++11)
関係演算子
Original:
Relational operators
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rel_ops::operator!=
rel_ops::operator>
rel_ops::operator<=
rel_ops::operator>=
ペアとタプル
Original:
Pairs and tuples
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pair
tuple(C++11)
piecewise_construct_t(C++11)
piecewise_construct(C++11)
フォワード、スワップ、および移動
Original:
Swap, forward and move
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swap
forward(C++11)
move(C++11)
move_if_noexcept(C++11)
declval(C++11)
 
std::tuple
メンバ関数
Original:
Member functions
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tuple::tuple
tuple::operator=
tuple::swap
非メンバ関数
Original:
Non-member functions
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make_tuple
tie
forward_as_tuple
None
operator=
operator!=
operator<
operator<=
operator>
operator>=
std::swap
get
ヘルパークラス
Original:
Helper classes
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tuple_size
tuple_element
uses_allocator
ignore
 
Defined in header <tuple>
template< class... Types, class Alloc >
struct uses_allocator< std::tuple<Types...>, Alloc > : std::true_type { };
(C++11およびそれ以降)
std::uses_allocatorのこの専門分野は、他のライブラリコンポーネントに通知し、そのタプルのサポート使用するアロケータ建設、それらが入れ子になったallocator_typeを持っていないにもかかわらず.
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.
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目次

Inherited from std::integral_constant

Member constants

value
[静的]
true
(パブリック静的メンバ定数)

Member functions

operator bool
boolにオブジェクトは、value返しに変換します
Original:
converts the object to bool, returns value
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(パブリックメンバ関数)

Member types

タイプ
Original:
Type
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Definition
value_type bool
type std::integral_constant<bool, value>

[編集]

// 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


[編集] も参照してください

チェックを指定した型が使用するアロケータ構築をサポートしている場合
Original:
checks if the specified type supports uses-allocator construction
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(クラステンプレート) [edit]