hpx::equal#

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 ExPolicy, typename FwdIter1, typename FwdIter2, typename Pred = detail::equal_to>
util::detail::algorithm_result_t<ExPolicy, bool> equal(ExPolicy &&policy, FwdIter1 first1, FwdIter1 last1, FwdIter2 first2, FwdIter2 last2, Pred &&op = Pred())#

Returns true if the range [first1, last1) is equal to the range [first2, last2), and false otherwise. Executed according to the policy.

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

The comparison operations in the parallel equal 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: O(min(last1 - first1, last2 - first2)) applications of the predicate op.

Note

The two ranges are considered equal if, for every iterator i in the range [first1,last1), *i equals *(first2 + (i - first1)). This overload of equal uses operator== to determine if two elements are equal.

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.

  • FwdIter1 – The type of the source iterators used for the first range (deduced). This iterator type must meet the requirements of an forward iterator.

  • FwdIter2 – The type of the source iterators used for the second range (deduced). This iterator type must meet the requirements of an forward iterator.

  • Pred – The type of an optional function/function object to use. Unlike its sequential form, the parallel overload of equal requires Pred to meet the requirements of CopyConstructible. This defaults to std::equal_to<>

Parameters

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

  • first1 – Refers to the beginning of the sequence of elements of the first range the algorithm will be applied to.

  • last1 – Refers to the end of the sequence of elements of the first range the algorithm will be applied to.

  • first2 – Refers to the beginning of the sequence of elements of the second range the algorithm will be applied to.

  • last2 – Refers to the end of the sequence of elements of the second range the algorithm will be applied to.

  • op – The binary predicate which returns true if the elements should be treated as equal. The signature of the predicate function should be equivalent to the following: 

    bool pred(const Type1 &a, const Type2 &b);
    The signature does not need to have const &, but the function must not modify the objects passed to it. The types Type1 and Type2 must be such that objects of types FwdIter1 and FwdIter2 can be dereferenced and then implicitly converted to Type1 and Type2 respectively

Returns

The equal algorithm returns a hpx::future<bool> if the execution policy is of type sequenced_task_policy or parallel_task_policy and returns bool otherwise. The equal algorithm returns true if the elements in the two ranges are equal, otherwise it returns false. If the length of the range [first1, last1) does not equal the length of the range [first2, last2), it returns false.

template<typename ExPolicy, typename FwdIter1, typename FwdIter2>
util::detail::algorithm_result_t<ExPolicy, bool> equal(ExPolicy &&policy, FwdIter1 first1, FwdIter1 last1, FwdIter2 first2, FwdIter2 last2)#

Returns true if the range [first1, last1) is equal to the range [first2, last2), and false otherwise. Executed according to policy.

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

The comparison operations in the parallel equal 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: O(min(last1 - first1, last2 - first2)) applications of the predicate std::equal_to.

Note

The two ranges are considered equal if, for every iterator i in the range [first1,last1), *i equals *(first2 + (i - first1)). This overload of equal uses operator== to determine if two elements are equal.

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.

  • FwdIter1 – The type of the source iterators used for the first range (deduced). This iterator type must meet the requirements of an forward iterator.

  • FwdIter2 – The type of the source iterators used for the second range (deduced). This iterator type must meet the requirements of an forward iterator.

Parameters

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

  • first1 – Refers to the beginning of the sequence of elements of the first range the algorithm will be applied to.

  • last1 – Refers to the end of the sequence of elements of the first range the algorithm will be applied to.

  • first2 – Refers to the beginning of the sequence of elements of the second range the algorithm will be applied to.

  • last2 – Refers to the end of the sequence of elements of the second range the algorithm will be applied to.

Returns

The equal algorithm returns a hpx::future<bool> if the execution policy is of type sequenced_task_policy or parallel_task_policy and returns bool otherwise. The equal algorithm returns true if the elements in the two ranges are equal, otherwise it returns false. If the length of the range [first1, last1) does not equal the length of the range [first2, last2), it returns false.

template<typename ExPolicy, typename FwdIter1, typename FwdIter2, typename Pred = detail::equal_to>
util::detail::algorithm_result_t<ExPolicy, bool> equal(ExPolicy &&policy, FwdIter1 first1, FwdIter1 last1, FwdIter2 first2, Pred &&op = Pred())#

Returns true if the range [first1, last1) is equal to the range starting at first2, and false otherwise. Executed according to policy.

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

The comparison operations in the parallel equal 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: O(min(last1 - first1, last2 - first2)) applications of the predicate op.

Note

The two ranges are considered equal if, for every iterator i in the range [first1,last1), *i equals *(first2 + (i - first1)). This overload of equal uses operator== to determine if two elements are equal.

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.

  • FwdIter1 – The type of the source iterators used for the first range (deduced). This iterator type must meet the requirements of an forward iterator.

  • FwdIter2 – The type of the source iterators used for the second range (deduced). This iterator type must meet the requirements of an forward iterator.

  • Pred – The type of an optional function/function object to use. Unlike its sequential form, the parallel overload of equal requires Pred to meet the requirements of CopyConstructible. This defaults to std::equal_to<>

Parameters

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

  • first1 – Refers to the beginning of the sequence of elements of the first range the algorithm will be applied to.

  • last1 – Refers to the end of the sequence of elements of the first range the algorithm will be applied to.

  • first2 – Refers to the beginning of the sequence of elements of the second range the algorithm will be applied to.

  • op – The binary predicate which returns true if the elements should be treated as equal. The signature of the predicate function should be equivalent to the following: 

    bool pred(const Type1 &a, const Type2 &b);
    The signature does not need to have const &, but the function must not modify the objects passed to it. The types Type1 and Type2 must be such that objects of types FwdIter1 and FwdIter2 can be dereferenced and then implicitly converted to Type1 and Type2 respectively

Returns

The equal algorithm returns a hpx::future<bool> if the execution policy is of type sequenced_task_policy or parallel_task_policy and returns bool otherwise. The equal algorithm returns true if the elements in the two ranges are equal, otherwise it returns false.

template<typename ExPolicy, typename FwdIter1, typename FwdIter2>
util::detail::algorithm_result_t<ExPolicy, bool> equal(ExPolicy &&policy, FwdIter1 first1, FwdIter1 last1, FwdIter2 first2)#

Returns true if the range [first1, last1) is equal to the range [first2, last2), and false otherwise. Executed according to policy.

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

The comparison operations in the parallel equal 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: At most last1 - first1 applications of the predicate op.

Note

The two ranges are considered equal if, for every iterator i in the range [first1,last1), *i equals *(first2 + (i - first1)). This overload of equal uses operator== to determine if two elements are equal.

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.

  • FwdIter1 – The type of the source iterators used for the first range (deduced). This iterator type must meet the requirements of an forward iterator.

  • FwdIter2 – The type of the source iterators used for the second range (deduced). This iterator type must meet the requirements of an forward iterator.

Parameters

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

  • first1 – Refers to the beginning of the sequence of elements of the first range the algorithm will be applied to.

  • last1 – Refers to the end of the sequence of elements of the first range the algorithm will be applied to.

  • first2 – Refers to the beginning of the sequence of elements of the second range the algorithm will be applied to.

Returns

The equal algorithm returns a hpx::future<bool> if the execution policy is of type sequenced_task_policy or parallel_task_policy and returns bool otherwise. The equal algorithm returns true if the elements in the two ranges are equal, otherwise it returns false. If the length of the range [first1, last1) does not equal the length of the range [first2, last2), it returns false.

template<typename FwdIter1, typename FwdIter2, typename Pred = detail::equal_to>
bool equal(FwdIter1 first1, FwdIter1 last1, FwdIter2 first2, FwdIter2 last2, Pred &&op = Pred())#

Returns true if the range [first1, last1) is equal to the range [first2, last2), and false otherwise.

Note

Complexity: At most min(last1 - first1, last2 - first2) applications of the predicate op.

Note

The two ranges are considered equal if, for every iterator i in the range [first1,last1), *i equals *(first2 + (i - first1)). This overload of equal uses operator== to determine if two elements are equal.

Template Parameters

  • FwdIter1 – The type of the source iterators used for the first range (deduced). This iterator type must meet the requirements of an forward iterator.

  • FwdIter2 – The type of the source iterators used for the second range (deduced). This iterator type must meet the requirements of an forward iterator.

  • Pred – The type of an optional function/function object to use. Unlike its sequential form, the parallel overload of equal requires Pred to meet the requirements of CopyConstructible. This defaults to std::equal_to<>

Parameters

  • first1 – Refers to the beginning of the sequence of elements of the first range the algorithm will be applied to.

  • last1 – Refers to the end of the sequence of elements of the first range the algorithm will be applied to.

  • first2 – Refers to the beginning of the sequence of elements of the second range the algorithm will be applied to.

  • last2 – Refers to the end of the sequence of elements of the second range the algorithm will be applied to.

  • op – The binary predicate which returns true if the elements should be treated as equal. The signature of the predicate function should be equivalent to the following: 

    bool pred(const Type1 &a, const Type2 &b);
    The signature does not need to have const &, but the function must not modify the objects passed to it. The types Type1 and Type2 must be such that objects of types FwdIter1 and FwdIter2 can be dereferenced and then implicitly converted to Type1 and Type2 respectively

Returns

The equal algorithm returns a bool . The equal algorithm returns true if the elements in the two ranges are equal, otherwise it returns false. If the length of the range [first1, last1) does not equal the length of the range [first2, last2), it returns false.

template<typename FwdIter1, typename FwdIter2>
bool equal(FwdIter1 first1, FwdIter1 last1, FwdIter2 first2, FwdIter2 last2)#

Returns true if the range [first1, last1) is equal to the range [first2, last2), and false otherwise.

Note

Complexity: At most min(last1 - first1, last2 - first2) applications of the predicate std::equal_to.

Note

The two ranges are considered equal if, for every iterator i in the range [first1,last1), *i equals *(first2 + (i - first1)). This overload of equal uses operator== to determine if two elements are equal.

Template Parameters

  • FwdIter1 – The type of the source iterators used for the first range (deduced). This iterator type must meet the requirements of an forward iterator.

  • FwdIter2 – The type of the source iterators used for the second range (deduced). This iterator type must meet the requirements of an forward iterator.

Parameters

  • first1 – Refers to the beginning of the sequence of elements of the first range the algorithm will be applied to.

  • last1 – Refers to the end of the sequence of elements of the first range the algorithm will be applied to.

  • first2 – Refers to the beginning of the sequence of elements of the second range the algorithm will be applied to.

  • last2 – Refers to the end of the sequence of elements of the second range the algorithm will be applied to.

Returns

The equal algorithm returns a bool . The equal algorithm returns true if the elements in the two ranges are equal, otherwise it returns false. If the length of the range [first1, last1) does not equal the length of the range [first2, last2), it returns false.

template<typename FwdIter1, typename FwdIter2, typename Pred = detail::equal_to>
bool equal(FwdIter1 first1, FwdIter1 last1, FwdIter2 first2, Pred &&op = Pred())#

Returns true if the range [first1, last1) is equal to the range [first2, first2 + (last1 - first1)), and false otherwise.

Note

Complexity: At most last1 - first1 applications of the predicate op.

Note

The two ranges are considered equal if, for every iterator i in the range [first1,last1), *i equals *(first2 + (i - first1)). This overload of equal uses operator== to determine if two elements are equal.

Template Parameters

  • FwdIter1 – The type of the source iterators used for the first range (deduced). This iterator type must meet the requirements of an forward iterator.

  • FwdIter2 – The type of the source iterators used for the second range (deduced). This iterator type must meet the requirements of an forward iterator.

  • Pred – The type of an optional function/function object to use. Unlike its sequential form, the parallel overload of equal requires Pred to meet the requirements of CopyConstructible. This defaults to std::equal_to<>

Parameters

  • first1 – Refers to the beginning of the sequence of elements of the first range the algorithm will be applied to.

  • last1 – Refers to the end of the sequence of elements of the first range the algorithm will be applied to.

  • first2 – Refers to the beginning of the sequence of elements of the second range the algorithm will be applied to.

  • op – The binary predicate which returns true if the elements should be treated as equal. The signature of the predicate function should be equivalent to the following: 

    bool pred(const Type1 &a, const Type2 &b);
    The signature does not need to have const &, but the function must not modify the objects passed to it. The types Type1 and Type2 must be such that objects of types FwdIter1 and FwdIter2 can be dereferenced and then implicitly converted to Type1 and Type2 respectively

Returns

The equal algorithm returns a bool . The equal algorithm returns true if the elements in the two ranges are equal, otherwise it returns false. If the length of the range [first1, last1) does not equal the length of the range [first2, last2), it returns false.