Use list init for test data in iterator docs (NVIDIA#4738)

Author: bernhardmgruber

thrust/thrust/iterator/constant_iterator.h

@@ -95,11 +95,7 @@ struct make_constant_iterator_base
 //!
 //! int main()
 //! {
-//!   thrust::device_vector<int> data(4);
-//!   data[0] = 3;
-//!   data[1] = 7;
-//!   data[2] = 2;
-//!   data[3] = 5;
+//!   thrust::device_vector<int> data{3, 7, 2, 5};
 //!
 //!   // add 10 to all values in data
 //!   thrust::transform(data.begin(), data.end(),

thrust/thrust/iterator/counting_iterator.h

@@ -134,15 +134,7 @@ struct make_counting_iterator_base
 //!  // this example computes indices for all the nonzero values in a sequence
 //!
 //!  // sequence of zero and nonzero values
-//!  thrust::device_vector<int> stencil(8);
-//!  stencil[0] = 0;
-//!  stencil[1] = 1;
-//!  stencil[2] = 1;
-//!  stencil[3] = 0;
-//!  stencil[4] = 0;
-//!  stencil[5] = 1;
-//!  stencil[6] = 0;
-//!  stencil[7] = 1;
+//!  thrust::device_vector<int> stencil{0, 1, 1, 0, 0, 1, 0, 1};
 //!
 //!  // storage for the nonzero indices
 //!  thrust::device_vector<int> indices(8);

thrust/thrust/iterator/discard_iterator.h

@@ -88,23 +88,8 @@ _CCCL_DIAG_SUPPRESS_MSVC(4244 4267) // possible loss of data
 //!
 //! int main()
 //! {
-//!   thrust::device_vector<int> keys(7), values(7);
-//!
-//!   keys[0] = 1;
-//!   keys[1] = 3;
-//!   keys[2] = 3;
-//!   keys[3] = 3;
-//!   keys[4] = 2;
-//!   keys[5] = 2;
-//!   keys[6] = 1;
-//!
-//!   values[0] = 9;
-//!   values[1] = 8;
-//!   values[2] = 7;
-//!   values[3] = 6;
-//!   values[4] = 5;
-//!   values[5] = 4;
-//!   values[6] = 3;
+//!   thrust::device_vector<int> keys{1, 3, 3, 3, 2, 2, 1};
+//!   thrust::device_vector<int> values{9, 8, 7, 6, 5, 4, 3};
 //!
 //!   thrust::device_vector<int> result(4);
 //!

thrust/thrust/iterator/permutation_iterator.h

@@ -98,21 +98,8 @@ struct make_permutation_iterator_base
 //! #include <thrust/iterator/permutation_iterator.h>
 //! #include <thrust/device_vector.h>
 //! ...
-//! thrust::device_vector<float> values(8);
-//! values[0] = 10.0f;
-//! values[1] = 20.0f;
-//! values[2] = 30.0f;
-//! values[3] = 40.0f;
-//! values[4] = 50.0f;
-//! values[5] = 60.0f;
-//! values[6] = 70.0f;
-//! values[7] = 80.0f;
-//!
-//! thrust::device_vector<int> indices(4);
-//! indices[0] = 2;
-//! indices[1] = 6;
-//! indices[2] = 1;
-//! indices[3] = 3;
+//! thrust::device_vector<float> values{10.0f, 20.0f, 30.0f, 40.0f, 50.0f, 60.0f, 70.0f, 80.0f};
+//! thrust::device_vector<int> indices{2, 6, 1, 3};
 //!
 //! using ElementIterator = thrust::device_vector<float>::iterator;
 //! using IndexIterator = thrust::device_vector<int>::iterator  ;

thrust/thrust/iterator/reverse_iterator.h

@@ -80,11 +80,7 @@ struct make_reverse_iterator_base
 //! #include <thrust/iterator/reverse_iterator.h>
 //! #include <thrust/device_vector.h>
 //! ...
-//! thrust::device_vector<float> v(4);
-//! v[0] = 0.0f;
-//! v[1] = 1.0f;
-//! v[2] = 2.0f;
-//! v[3] = 3.0f;
+//! thrust::device_vector<float> v{0.0f, 1.0f, 2.0f, 3.0f};
 //!
 //! using Iterator = thrust::device_vector<float>::iterator;
 //!
@@ -106,11 +102,7 @@ struct make_reverse_iterator_base
 //! \code
 //! #include <thrust/device_vector.h>
 //! ...
-//! thrust::device_vector<float> v(4);
-//! v[0] = 0.0f;
-//! v[1] = 1.0f;
-//! v[2] = 2.0f;
-//! v[3] = 3.0f;
+//! thrust::device_vector<float> v{0.0f, 1.0f, 2.0f, 3.0f};
 //!
 //! // we use the nested type reverse_iterator to refer to a reversed view of a device_vector and the method rbegin() to
 //! // create a reverse_iterator pointing to the beginning of the reversed device_vector
@@ -135,12 +127,7 @@ struct make_reverse_iterator_base
 //! #include <thrust/device_vector.h>
 //! #include <thrust/scan.h>
 //! ...
-//! thrust::device_vector<int> v(5);
-//! v[0] = 0;
-//! v[1] = 1;
-//! v[2] = 2;
-//! v[3] = 3;
-//! v[4] = 4;
+//! thrust::device_vector<int> v{0, 1, 2, 3, 4};
 //!
 //! thrust::device_vector<int> result(5);
 //!

thrust/thrust/iterator/transform_iterator.h

@@ -131,11 +131,7 @@ struct make_transform_iterator_base
 //!
 //! int main()
 //! {
-//!   thrust::device_vector<float> v(4);
-//!   v[0] = 1.0f;
-//!   v[1] = 4.0f;
-//!   v[2] = 9.0f;
-//!   v[3] = 16.0f;
+//!   thrust::device_vector<float> v{1.0f, 4.0f, 9.0f, 16.0f};
 //!
 //!   using FloatIterator = thrust::device_vector<float>::iterator;
 //!
@@ -173,11 +169,7 @@ struct make_transform_iterator_base
 //! int main()
 //! {
 //!   // initialize a device array
-//!   thrust::device_vector<float> v(4);
-//!   v[0] = 1.0f;
-//!   v[1] = 2.0f;
-//!   v[2] = 3.0f;
-//!   v[3] = 4.0f;
+//!   thrust::device_vector<float> v{1.0f, 2.0f, 3.0f, 4.0f};
 //!
 //!   float sum_of_squares =
 //!    thrust::reduce(thrust::make_transform_iterator(v.begin(), square()),
@@ -206,11 +198,7 @@ struct make_transform_iterator_base
 //!
 //! int main()
 //! {
-//!   thrust::device_vector<float> v(4);
-//!   v[0] = 1.0f;
-//!   v[1] = 4.0f;
-//!   v[2] = 9.0f;
-//!   v[3] = 16.0f;
+//!   thrust::device_vector<float> v{1.0f, 4.0f, 9.0f, 16.0f};
 //!
 //!   using FloatIterator = thrust::device_vector<float>::iterator;
 //!