thrust::sequence

Defined in thrust/sequence.h

template<typename DerivedPolicy, typename ForwardIterator, typename T>
void thrust::sequence(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, ForwardIterator first, ForwardIterator last, T init)

sequence fills the range [first, last) with a sequence of numbers.

For each iterator i in the range [first, last), this version of sequence performs the assignment *i = init + (i - first).

The algorithm’s execution is parallelized as determined by exec.

The following code snippet demonstrates how to use sequence to fill a range with a sequence of numbers starting from the value 1 using the thrust::host execution policy for parallelization:

#include <thrust/sequence.h>
#include <thrust/execution_policy.h>
...
const int N = 10;
int A[N];
thrust::sequence(thrust::host, A, A + 10, 1);
// A is now {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}

Note

Unlike the similar C++ STL function std::iota, sequence offers no guarantee on order of execution.

Parameters
  • exec – The execution policy to use for parallelization.

  • first – The beginning of the sequence.

  • last – The end of the sequence.

  • init – The first value of the sequence of numbers.

Template Parameters
  • DerivedPolicy – The name of the derived execution policy.

  • ForwardIterator – is a model of Forward Iterator, and ForwardIterator is mutable, and if x and y are objects of ForwardIterator's value_type, then x + y is defined, and if T is ForwardIterator's value_type, then T(0) is defined.

  • T – is a model of Assignable, and T is convertible to ForwardIterator's value_type.