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std::destroy

From cppreference.com
< cpp‎ | memory
 
 
 
Dynamic memory management
Uninitialized storage
(C++17)
(deprecated since c++17)
(deprecated since c++17)
(deprecated since c++17)
Garbage collection support
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(C++11)
(C++11)
C Library
Low level memory management
 
Defined in header <memory>
template< class ForwardIt >
void destroy( ForwardIt first, ForwardIt last );
(1) (since C++17)
template< class ExecutionPolicy, class ForwardIt >
void destroy( ExecutionPolicy&& policy, ForwardIt first, ForwardIt last );
(2) (since C++17)
1) Destroys the objects in the range [first, last), as if by
for (; first != last; ++first)
  std::destroy_at(std::addressof(*first));
2) Same as (1), but executed according to policy. This overload does not participate in overload resolution unless std::is_execution_policy_v<std::decay_t<ExecutionPolicy>> is true.

Contents

[edit] Parameters

first, last - the range of elements to destroy
policy - the execution policy to use. See execution policy for details.
Type requirements
-
ForwardIt must meet the requirements of ForwardIterator.
-
No increment, assignment, comparison, or indirection through valid instances of ForwardIt may throw exceptions.

[edit] Return value

(none)

[edit] Complexity

Linear in the distance between first and last.

[edit] Exceptions

The overload with a template parameter named ExecutionPolicy reports errors as follows:

  • If execution of a function invoked as part of the algorithm throws an exception and ExecutionPolicy is one of the three standard policies, std::terminate is called. For any other ExecutionPolicy, the behavior is implementation-defined.
  • If the algorithm fails to allocate memory, std::bad_alloc is thrown.

[edit] Possible implementation

template< class ForwardIt >
void destroy( ForwardIt first, ForwardIt last )
{
  for (; first != last; ++first)
    std::destroy_at(std::addressof(*first));
}

[edit] Example

[edit] See also

(C++17)
destroys a number of objects in a range
(function template) [edit]
destroys an object at a given address
(function template) [edit]