std::forward_list<T,Allocator>::emplace_front
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< cpp | container | forward list
| 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)....
No iterators or 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, this function has no effect (strong exception guarantee).
See also
| (C++11) |
inserts an element to the beginning (public member function) |