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

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operator==operator<=> (C++20)
swap(std::deque)
erase(std::deque)erase_if(std::deque) (C++20)(C++20)

operator!=operator<operator>operator<=operator>=

(until C++20)(until C++20)(until C++20)(until C++20)(until C++20)

Deduction guides(C++17)

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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) (constexpr since C++26)

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

All iterators (including theend() iterator) are invalidated. No references are invalidated.

[edit]Parameters

args	-	arguments to forward to the constructor of the element
Type requirements
- If`T` is notEmplaceConstructible into`deque` fromargs..., the behavior is undefined.