std::deque<T,Allocator>::emplace_front

 

C++

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std::deque

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deque::deque

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deque::operator=

deque::assign

deque::assign_range (C++23)

deque::get_allocator

Element access

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Iterators

deque::begindeque::cbegin (C++11)

deque::enddeque::cend (C++11)

deque::rbegindeque::crbegin (C++11)

deque::renddeque::crend (C++11)

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Modifiers

deque::clear

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deque::insert_range (C++23)

deque::emplace

deque::erase

deque::push_front

deque::emplace_front (C++11)

deque::prepend_range (C++23)

deque::pop_front

deque::push_back

deque::emplace_back (C++11)

deque::append_range (C++23)

deque::pop_back

deque::resize

deque::swap

Non-member functions

std::swap

eraseerase_if (C++20)(C++20)

operator==operator!=operator<operator>operator<=operator>=operator<=> (until C++20)(until C++20)(until C++20)(until C++20)(until C++20)(C++20)

Deduction guides(C++17)

 

template< class... Args > void emplace_front( Args&&... args );		(since C++11) (until C++17)
template< class... Args > reference emplace_front( Args&&... args );		(since C++17)

Inserts a new element to the beginning of the container. The element is constructed through std::allocator_traits::construct, which typically uses placement-new to construct the element in-place at the location provided by the container. The arguments args... are forwarded to the constructor as std::forward<Args>(args)....

All iterators (including the end() iterator) are invalidated. No references are invalidated.

Parameters

args	-	arguments to forward to the constructor of the element
Type requirements
- T (the container's element type) must meet the requirements of EmplaceConstructible.

Return value

(none)	(until C++17)
A reference to the inserted element.	(since C++17)

Complexity

Constant.

Exceptions

If an exception is thrown for any reason, this function has no effect (strong exception safety guarantee).

See also

push_front

inserts an element to the beginning (public member function)