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std::unordered_map::at

提供: cppreference.com

 
 
 
std::unordered_map
メンバ関数
Original:
Member functions
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unordered_map::unordered_map
unordered_map::~unordered_map
unordered_map::operator=
unordered_map::get_allocator
イテレータ
Original:
Iterators
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unordered_map::begin
unordered_map::cbegin
unordered_map::end
unordered_map::cend
容量
Original:
Capacity
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unordered_map::erase
unordered_map::size
unordered_map::max_size
修飾子
Original:
Modifiers
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unordered_map::clear
unordered_map::insert
unordered_map::emplace
unordered_map::emplace_hint
unordered_map::erase
unordered_map::swap
ルック
Original:
Lookup
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unordered_map::count
unordered_map::find
unordered_map::equal_range
バケットインターフェイス
Original:
Bucket interface
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unordered_map::begin2
unordered_map::end2
unordered_map::bucket_count
unordered_map::max_bucket_count
unordered_map::bucket_size
unordered_map::bucket
ハッシュポリシー
Original:
Hash policy
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unordered_map::load_factor
unordered_map::max_load_factor
unordered_map::rehash
unordered_map::reserve
オブザーバー
Original:
Observers
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unordered_map::hash_function
unordered_map::key_eq
 
T& at( const Key& key );
(1) (C++11およびそれ以降)
const T & at( const Key& key ) const;
(2) (C++11およびそれ以降)
keyにキーボードショートカットを持つ要素のマッピングされた値への参照を返します。そのような要素が存在しない場合は、タイプstd::out_of_rangeの例外がスローされます.
Original:
Returns a reference to the mapped value of the element with key equivalent to key. If no such element exists, an exception of type std::out_of_range is thrown.
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目次

[編集] パラメータ

key -
検索する要素のキー
Original:
the key of the element to find
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[編集] 値を返します

要求された要素のマッピングされた値への参照
Original:
Reference to the mapped value of the requested element
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[編集] 例外

std::out_of_rangeコンテナが指定key持つ要素を持っていない場合
Original:
std::out_of_range if the container does not have an element with the specified key
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[編集] 複雑

Average case: constant, worst case: linear in size.

[編集] も参照してください

指定された要素にアクセスします
Original:
access specified element
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(パブリックメンバ関数) [edit]