C++ named requirements: EmplaceConstructible (since C++11)
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Specifies that an object of the type can be constructed from a given set of arguments in uninitialized storage by a given allocator.
Requirements
The type T
is EmplaceConstructible into the Container
X
(whose value_type
is identical to T
) from the arguments args
A
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an allocator type |
m
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an lvalue of type A
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p
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the pointer of type T* prepared by the container
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args
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zero or more arguments |
where X::allocator_type
is identical to
std::allocator_traits
<A>
::
rebind_alloc
<T>
the following expression is well-formed:
std::allocator_traits<A>::construct(m, p, args);
If X
is not allocator-aware or is a std::basic_string specialization, the term is defined as if A
were std::allocator<T>, except that no allocator object needs to be created, and user-defined specializations of std::allocator
Notes
Although it is required that customized construct
is used when constructing elements of std::basic_string until C++23, all implementations only used the default mechanism. The requirement is corrected by P1072R10
See also
CopyInsertable | |
MoveInsertable |