std::destroy
From cppreference.com
| Defined in header <memory>
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| 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.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.
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-No increment, assignment, comparison, or indirection through valid instances of ForwardIt may throw exceptions.
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Return value
(none)
Complexity
Linear in the distance between first and last.
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
ExecutionPolicyis one of the three standard policies, std::terminate is called. For any otherExecutionPolicy, the behavior is implementation-defined. - If the algorithm fails to allocate memory, std::bad_alloc is thrown.
Possible implementation
template< class ForwardIt > void destroy( ForwardIt first, ForwardIt last ) { for (; first != last; ++first) std::destroy_at(std::addressof(*first)); } |
Example
| This section is incomplete Reason: no example |
See also
| (C++17) |
destroys a number of objects in a range (function template) |
| (C++17) |
destroys an object at a given address (function template) |