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cbefore_begin
Containers library
Node handle
operators (std::array)
operators (std::deque)
operators (std::forward_list)
operators (std::list)
operators (std::map)
operators (std::multimap)
operators (std::multiset)
operators (std::queue)
operators (std::set)
operators (std::stack)
operators (std::unordered_map)
operators (std::unordered_multimap)
operators (std::unordered_multiset)
operators (std::unordered_set)
operators (std::vector)
remove_if
remove_if
std::array
std::array::at
std::array::back
std::array::begin
std::array::cbegin
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std::array::crbegin
std::array::crend
std::array::data
std::array::empty
std::array::end
std::array::fill
std::array::front
std::array::max_size
std::array::operator[]
std::array::rbegin
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std::array::size
std::array::swap
std::deque
std::deque::assign
std::deque::at
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std::deque::begin
std::deque::cbegin
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std::deque::clear
std::deque::crbegin
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std::deque::deque
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std::deque::shrink_to_fit
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std::forward_list
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std::forward_list::begin
std::forward_list::cbegin
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std::forward_list::emplace_after
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std::forward_list::forward_list
std::forward_list::front
std::forward_list::get_allocator
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std::forward_list::max_size
std::forward_list::merge
std::forward_list::pop_front
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std::forward_list::remove
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std::forward_list::unique
std::get(std::array)
std::hash
std::list
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std::list::begin
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std::list::emplace_front
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std::list::erase
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std::list::insert
std::list::list
std::list::max_size
std::list::merge
std::list::pop_back
std::list::pop_front
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std::list::push_front
std::list::rbegin
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std::list::rend
std::list::resize
std::list::reverse
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std::list::unique
std::map
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std::map::extract
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std::map::key_comp
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std::map::max_size
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std::map::operator[]
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std::map::upper_bound
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std::multimap
std::multimap::begin
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std::multimap::emplace
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std::multimap::end
std::multimap::equal_range
std::multimap::erase
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std::multimap::find
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std::multimap::insert
std::multimap::key_comp
std::multimap::lower_bound
std::multimap::max_size
std::multimap::merge
std::multimap::multimap
std::multimap::rbegin
std::multimap::rend
std::multimap::size
std::multimap::swap
std::multimap::upper_bound
std::multimap::value_comp
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std::multiset
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std::multiset::max_size
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std::multiset::multiset
std::multiset::rbegin
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std::multiset::upper_bound
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std::priority_queue::priority_queue
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std::queue
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std::set
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std::stack
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std::stack::top
std::swap(std::array)
std::swap(std::deque)
std::swap(std::forward_list)
std::swap(std::list)
std::swap(std::map)
std::swap(std::multimap)
std::swap(std::multiset)
std::swap(std::priority_queue)
std::swap(std::queue)
std::swap(std::set)
std::swap(std::stack)
std::swap(std::unordered_map)
std::swap(std::unordered_multimap)
std::swap(std::unordered_multiset)
std::swap(std::unordered_set)
std::swap(std::vector)
std::tuple_element<std::array>
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std::unordered_map
std::unordered_map::at
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std::unordered_map::begin(int)
std::unordered_map::bucket
std::unordered_map::bucket_count
std::unordered_map::bucket_size
std::unordered_map::cbegin
std::unordered_map::cbegin
std::unordered_map::cend
std::unordered_map::cend
std::unordered_map::clear
std::unordered_map::count
std::unordered_map::emplace
std::unordered_map::emplace_hint
std::unordered_map::empty
std::unordered_map::end
std::unordered_map::end(int)
std::unordered_map::equal_range
std::unordered_map::erase
std::unordered_map::extract
std::unordered_map::find
std::unordered_map::get_allocator
std::unordered_map::hash_function
std::unordered_map::insert
std::unordered_map::insert_or_assign
std::unordered_map::key_eq
std::unordered_map::load_factor
std::unordered_map::max_bucket_count
std::unordered_map::max_load_factor
std::unordered_map::max_size
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std::unordered_map::operator[]
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std::unordered_map::unordered_map
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std::unordered_multimap::empty
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std::unordered_multimap::equal_range
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std::unordered_multimap::hash_function
std::unordered_multimap::insert
std::unordered_multimap::key_eq
std::unordered_multimap::load_factor
std::unordered_multimap::max_bucket_count
std::unordered_multimap::max_load_factor
std::unordered_multimap::max_size
std::unordered_multimap::merge
std::unordered_multimap::rehash
std::unordered_multimap::reserve
std::unordered_multimap::size
std::unordered_multimap::swap
std::unordered_multimap::unordered_multimap
std::unordered_multiset
std::unordered_multiset::begin
std::unordered_multiset::begin(int)
std::unordered_multiset::bucket
std::unordered_multiset::bucket_count
std::unordered_multiset::bucket_size
std::unordered_multiset::cbegin
std::unordered_multiset::cbegin
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std::unordered_multiset::cend
std::unordered_multiset::clear
std::unordered_multiset::count
std::unordered_multiset::emplace
std::unordered_multiset::emplace_hint
std::unordered_multiset::empty
std::unordered_multiset::end
std::unordered_multiset::end(int)
std::unordered_multiset::equal_range
std::unordered_multiset::erase
std::unordered_multiset::extract
std::unordered_multiset::find
std::unordered_multiset::get_allocator
std::unordered_multiset::hash_function
std::unordered_multiset::insert
std::unordered_multiset::key_eq
std::unordered_multiset::load_factor
std::unordered_multiset::max_bucket_count
std::unordered_multiset::max_load_factor
std::unordered_multiset::max_size
std::unordered_multiset::merge
std::unordered_multiset::rehash
std::unordered_multiset::reserve
std::unordered_multiset::size
std::unordered_multiset::swap
std::unordered_multiset::unordered_multiset
std::unordered_set
std::unordered_set::begin
std::unordered_set::begin(int)
std::unordered_set::bucket
std::unordered_set::bucket_count
std::unordered_set::bucket_size
std::unordered_set::cbegin
std::unordered_set::cbegin
std::unordered_set::cend
std::unordered_set::cend
std::unordered_set::clear
std::unordered_set::count
std::unordered_set::emplace
std::unordered_set::emplace_hint
std::unordered_set::empty
std::unordered_set::end
std::unordered_set::end(int)
std::unordered_set::equal_range
std::unordered_set::erase
std::unordered_set::extract
std::unordered_set::find
std::unordered_set::get_allocator
std::unordered_set::hash_function
std::unordered_set::insert
std::unordered_set::key_eq
std::unordered_set::load_factor
std::unordered_set::max_bucket_count
std::unordered_set::max_load_factor
std::unordered_set::max_size
std::unordered_set::merge
std::unordered_set::rehash
std::unordered_set::reserve
std::unordered_set::size
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std::unordered_set::unordered_set
std::uses_allocator<std::priority_queue>
std::uses_allocator<std::queue>
std::uses_allocator<std::stack>
std::vector
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std::vector::at
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std::vector::begin
std::vector::capacity
std::vector::cbegin
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std::vector::crend
std::vector::data
std::vector::emplace
std::vector::emplace_back
std::vector::empty
std::vector::end
std::vector::erase
std::vector::front
std::vector::get_allocator
std::vector::insert
std::vector::max_size
std::vector::operator[]
std::vector::pop_back
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std::vector::rbegin
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std::vector::resize
std::vector::shrink_to_fit
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std::vector::vector
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std::map::insert_or_assign

STD：：map：：插入[医]或[医]指派

template pair insert_or_assign(const key_type& k, M&& obj(1)(since C++17)
template <class M> pair<iterator, bool> insert_or_assign(key_type&& k, M&& obj(2)(since C++17)
template <class M> iterator insert_or_assign(const_iterator hint, const key_type& k, M&& obj(3)(since C++17)
template <class M> iterator insert_or_assign(const_iterator hint, key_type&& k, M&& obj(4)(since C++17)

1，3%29，如果密钥相当于k已存在于容器中，则分配std::forward<M>(obj)到mapped_type对应键k如果键不存在，则插入新值，就像插入，从value_type(k,std::forward<M>(obj))

2，4%29与%281，3%29相同，但映射值是从value_type(std::move(k),std::forward<M>(obj))

没有迭代器或引用无效。如果插入成功，则在节点句柄中保存时获得的元素的指针和引用无效，并且在提取该元素之前获得的指针和引用变得有效。%28自C++17%29。

参数

k-the key used both to look up and to insert if not found
hint-iterator to the position before which the new element will be inserted
args-arguments to forward to the constructor of the element

返回值

1，2%29 bool组分是true如果插入发生了false如果任务发生了。迭代器组件指向插入或更新的元素。

3，4%29指向插入或更新的元素的Iterator

复杂性

1，2%29与座落

3.4%29与座落[医]暗示

注记

insert_or_assign返回比operator[]并且不要求映射类型的默认可构造性。

例

另见

operator[]access specified element (public member function)
at (C++11)access specified element with bounds checking (public member function)
insertinserts elements or nodes (since C++17) (public member function)
emplace (C++11)constructs element in-place (public member function)

 © cppreference.com

在CreativeCommonsAttribution下授权-ShareAlike未移植许可v3.0。

http：//en.cppreference.com/w/cpp/容器/map/INSERT[医]或[医]指派

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