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.
| args | - | arguments to forward to the constructor of the element |
| Type requirements | ||
-T (the container's element type) must meet the requirements of EmplaceConstructible. |
||
| (none) | (until C++17) |
| A reference to the inserted element. | (since C++17) |
Constant.
If an exception is thrown, this function has no effect (strong exception guarantee).
| inserts an element to the beginning (public member function) |
© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
https://en.cppreference.com/w/cpp/container/deque/emplace_front