hpx::uninitialized_value_construct, hpx::uninitialized_value_construct_n#

Defined in header hpx/algorithm.hpp.

See Public API for a list of names and headers that are part of the public HPX API.

namespace hpx

Functions

template<typename FwdIter>
void uninitialized_value_construct(FwdIter first, FwdIter last)#

Constructs objects of type typename iterator_traits<ForwardIt> ::value_type in the uninitialized storage designated by the range by value-initialization. If an exception is thrown during the initialization, the function has no effects.

Note

Complexity: Performs exactly last - first assignments.

Template Parameters

FwdIter – The type of the source iterators used (deduced). This iterator type must meet the requirements of a forward iterator.

Parameters

  • first – Refers to the beginning of the sequence of elements the algorithm will be applied to.

  • last – Refers to the end of the sequence of elements the algorithm will be applied to.

Returns

The uninitialized_value_construct algorithm returns nothing

template<typename ExPolicy, typename FwdIter>
hpx::parallel::util::detail::algorithm_result_t<ExPolicy> uninitialized_value_construct(ExPolicy &&policy, FwdIter first, FwdIter last)#

Constructs objects of type typename iterator_traits<ForwardIt> ::value_type in the uninitialized storage designated by the range by value-initialization. If an exception is thrown during the initialization, the function has no effects. Executed according to the policy.

The assignments in the parallel uninitialized_value_construct algorithm invoked with an execution policy object of type sequenced_policy execute in sequential order in the calling thread.

The assignments in the parallel uninitialized_value_construct algorithm invoked with an execution policy object of type parallel_policy or parallel_task_policy are permitted to execute in an unordered fashion in unspecified threads, and indeterminately sequenced within each thread.

Note

Complexity: Performs exactly last - first assignments.

Template Parameters

  • ExPolicy – The type of the execution policy to use (deduced). It describes the manner in which the execution of the algorithm may be parallelized and the manner in which it executes the assignments.

  • FwdIter – The type of the source iterators used (deduced). This iterator type must meet the requirements of a forward iterator.

Parameters

  • policy – The execution policy to use for the scheduling of the iterations.

  • first – Refers to the beginning of the sequence of elements the algorithm will be applied to.

  • last – Refers to the end of the sequence of elements the algorithm will be applied to.

Returns

The uninitialized_value_construct algorithm returns a hpx::future<void>, if the execution policy is of type sequenced_task_policy or parallel_task_policy and returns nothing otherwise.

template<typename FwdIter, typename Size>
FwdIter uninitialized_value_construct_n(FwdIter first, Size count)#

Constructs objects of type typename iterator_traits<ForwardIt> ::value_type in the uninitialized storage designated by the range [first, first + count) by value-initialization. If an exception is thrown during the initialization, the function has no effects.

Note

Complexity: Performs exactly count assignments, if count > 0, no assignments otherwise.

Template Parameters

  • FwdIter – The type of the source iterators used (deduced). This iterator type must meet the requirements of a forward iterator.

  • Size – The type of the argument specifying the number of elements to apply f to.

Parameters

  • first – Refers to the beginning of the sequence of elements the algorithm will be applied to.

  • count – Refers to the number of elements starting at first the algorithm will be applied to.

Returns

The uninitialized_value_construct_n algorithm returns a returns FwdIter. The uninitialized_value_construct_n algorithm returns the iterator to the element in the source range, one past the last element constructed.

template<typename ExPolicy, typename FwdIter, typename Size>
hpx::parallel::util::detail::algorithm_result_t<ExPolicy, FwdIter> uninitialized_value_construct_n(ExPolicy &&policy, FwdIter first, Size count)#

Constructs objects of type typename iterator_traits<ForwardIt> ::value_type in the uninitialized storage designated by the range [first, first + count) by value-initialization. If an exception is thrown during the initialization, the function has no effects.

The assignments in the parallel uninitialized_value_construct_n algorithm invoked with an execution policy object of type sequenced_policy execute in sequential order in the calling thread.

The assignments in the parallel uninitialized_value_construct_n algorithm invoked with an execution policy object of type parallel_policy or parallel_task_policy are permitted to execute in an unordered fashion in unspecified threads, and indeterminately sequenced within each thread.

Note

Complexity: Performs exactly count assignments, if count > 0, no assignments otherwise.

Template Parameters

  • ExPolicy – The type of the execution policy to use (deduced). It describes the manner in which the execution of the algorithm may be parallelized and the manner in which it executes the assignments.

  • FwdIter – The type of the source iterators used (deduced). This iterator type must meet the requirements of a forward iterator.

  • Size – The type of the argument specifying the number of elements to apply f to.

Parameters

  • policy – The execution policy to use for the scheduling of the iterations.

  • first – Refers to the beginning of the sequence of elements the algorithm will be applied to.

  • count – Refers to the number of elements starting at first the algorithm will be applied to.

Returns

The uninitialized_value_construct_n algorithm returns a hpx::future<FwdIter> if the execution policy is of type sequenced_task_policy or parallel_task_policy and returns FwdIter otherwise. The uninitialized_value_construct_n algorithm returns the iterator to the element in the source range, one past the last element constructed.