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C++ named requirements: CopyInsertable (since C++11)

From cppreference.com
< cpp‎ | named req
 
C++
 
C++ named requirements
 

Specifies that an object of the type can be copy-constructed in-place by a given allocator.

[edit] Requirements

Given the following types, values and expressions:

Type Definition
T an object type
A an allocator type
X a container type satisfying all following conditions:
  • X::value_type is the same as T.
  • X::allocator_type is the same as std::allocator_traits<A>::rebind_alloc<T>.
Value Definition
m an lvalue of type A
p a pointer of type T*
Expression Definition
v an expression denoting an lvalue of type T / const T, or an rvalue of type const T
expr std::allocator_traits<A>::construct(m, p, v)

T is CopyInsertable into X if all following conditions are satisfied:

  • T is MoveInsertable into X.
  • expr is well-formed.
  • Evaluating expr does not change the value of v.
  • Right after the evaluation of expr, the value of v is equivalent to *p.

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