std::set::emplace_hint
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template <class... Args> iterator emplace_hint( const_iterator hint, Args&&... args ); |
(C++11 起) | |
插入一个新元素的容器,使用
hint
一个建议,其中的元素。该元件是构成在就地,即没有复制或移动操作进行。 The constructor of the element is called with exactly the same arguments as supplied to the function, forwarded with std::forward<Args>(args)....原文:
Inserts a new element to the container, using
hint
as a suggestion where the element should go. The element is constructed in-place, i.e. no copy or move operations are performed. The constructor of the element is called with exactly the same arguments as supplied to the function, forwarded with std::forward<Args>(args)....No iterators or references are invalidated.
目录 |
[编辑] 参数
hint | - | 迭代器,用于插入新的元素,作为一个建议
原文: iterator, used as a suggestion as to where to insert the new element |
args | - | 元素的构造函数的参数转发
原文: arguments to forward to the constructor of the element |
[编辑] 返回值
返回一个迭代器新插入的元素.
原文:
Returns an iterator to the newly inserted element.
If the insertion failed because the element already exists, returns an iterator to the already existing element with the equivalent key.
[编辑] 复杂性
Logarithmic in the size of the container in general, but amortized constant if the new element is inserted just before hint
.
[编辑] 另请参阅
(C++11) |
就地构造元素 (公共成员函数) |
插入元素 (公共成员函数) |