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C++ Libraries
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Coding Standards
This is an older version of Boost and was released in 2024. The current version is 1.90.0.
Append a constructed element in-place.
template<
class Arg>
value&
emplace_back(
Arg&& arg);
Appends a new element to the end of the container's list of elements. The
element is constructed using placement-new with the parameter std::forward<Arg>(arg).
If capacity()
< size() + 1,
a reallocation occurs first, and all iterators and references are invalidated.
Otherwise, only the iterators and references from the insertion point forward
are invalidated. All past-the-end iterators are also invalidated.
Amortized constant.
Strong guarantee. Calls to memory_resource::allocate
may throw.
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Name |
Description |
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The argument to forward to the |
A reference to the inserted element