std::map::emplace

 

C++

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概念

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正则表达式库 （C++11）

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容器库

array （C++11）

vector

deque

forward_list （C++11）

list

set

multiset

map

multimap

unordered_set （C++11）

unordered_multiset （C++11）

unordered_map （C++11）

unordered_multimap （C++11）

stack

queue

priority_queue

 

std::map

成员函数 Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

map::map

map::~map

map::operator=

map::get_allocator

元素的访问 Original: Element access The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

map::at

map::operator[]

迭代器 Original: Iterators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

map::begin map::cbegin （C++11）

map::end map::cend （C++11）

map::rbegin map::crbegin （C++11）

map::rend map::crend （C++11）

容量 Original: Capacity The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

map::empty

map::size

map::max_size

修饰符 Original: Modifiers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

map::clear

map::insert

map::emplace （C++11）

map::emplace_hint （C++11）

map::erase

map::swap

查找 Original: Lookup The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

map::count

map::find

map::equal_range

map::lower_bound

map::upper_bound

观察员 Original: Observers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

map::key_comp

map::value_comp

 

template< class... Args > std::pair<iterator,bool> emplace( Args&&... args );		（C++11 起）

一个新的元素插入到容器中。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 type (value_type, that is, std::pair<const Key, T>) is called with exactly the same arguments as supplied to the function, forwarded with std::forward<Args>(args)....

Original:

Inserts a new element to the container. The element is constructed in-place, i.e. no copy or move operations are performed. The constructor of the element type (value_type, that is, std::pair<const Key, T>) is called with exactly the same arguments as supplied to the function, forwarded with std::forward<Args>(args)....

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No iterators or references are invalidated.

参数

args

-

元素的构造函数的参数转发 Original: arguments to forward to the constructor of the element The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

返回值

returns a pair consisting of a bool denoting whether the insertion took place and an iterator to the inserted element.

复杂性

Logarithmic in the size of the container.

另请参阅

emplace_hint （C++11）	构建了一丝元素的地方使用 Original: constructs elements in-place using a hint The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共成员函数）
insert	插入元素 Original: inserts elements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共成员函数）